For 1990-2009 cars

## Engine Control Module Scan Tool Information V6

Table 1: | Engine Control Module Scan Tool Data
Table 2: | Engine Control Module (ECM) Scan Tool Output Controls

The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following is determined:

• | The Diagnostic System Check - Vehicle is completed.

• | No diagnostic trouble codes (DTCs)

• | On-board diagnostics are functioning properly

The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

Note: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis.

#### Engine Control Module Scan Tool Data

Parameter | System State | Expected Value | Description
--- | --- | --- | ---
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop
5V Reference 1 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5V Reference 2 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5V Reference 3 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
A/C Disengage 1-8 History | A/C ON | Reason for A/C Disengagement | The parameter displays the last 8 air conditioning (A/C) compressor disengages in order from 1 to 8 with 8 being the most recent. There are about 8 possible causes for the A/C compressor to disengage.
A/C High Side Pressure Sensor | A/C OFF | 1.24 Volts | This parameter displays the voltage from the A/C high side pressure sensor signal circuit to the control module.
A/C ON | 1.45 Volts
A/C High Side Pressure Sensor | A/C OFF | 500-2,200 kPa (72-319 psi) | This parameter displays the pressure from the A/C high side pressure sensor signal circuit to the control module.
A/C ON | 300-1,200 kPa (43-174 psi)
A/C Off for WOT | A/C ON | No | This parameter displays whether the control module is commanding the A/C compressor clutch relay off for wide open throttle (WOT).
A/C Disable - A/C Pressure Out of Range | A/C ON | No | This parameter displays whether the A/C pressure is out of range for normal operation as determined by the control module.
A/C Compressor Clutch Relay Control Circuit Low Voltage Test Status | A/C ON or OFF | OK/Not Run | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the A/C clutch relay control circuit is shorted to ground.
A/C Compressor Clutch Relay Control Circuit Open Test Status | A/C ON or OFF | OK/Not Run | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the A/C clutch relay control circuit is open.
A/C Compressor Clutch Relay Control Circuit High Voltage Test Status | A/C ON or OFF | OK/Not Run | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the A/C clutch relay control circuit is shorted to voltage.
A/C Compressor Clutch Relay Command | A/C ON | On | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit as commanded by the control module.
A/C Request Signal | A/C ON | Yes | This parameter displays the state of the A/C request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls.
Air/Fuel Equivalence Ratio Command | -- | Varies | This parameter displays the ratio of air to fuel as calculated by the control module based on various sensor inputs. The scan tool will display a lower air fuel ratio when a richer air to fuel mixture is commanded. The scan tool will display a higher air fuel ratio when a leaner air to fuel mixture is commanded. In closed loop operation the air fuel ratio should normally be approximately 14.7 to 1.
Ambient Air Temperature | -- | °C °F Varies | This parameter displays the surrounding air temperature, at any given altitude.
Accelerator Pedal Position | Accelerator pedal not actuated | 0% | This parameter displays the angle of the accelerator pedal position (APP) as calculated by the control module using the signals from the APP sensors.
Accelerator pedal fully actuated | 100%
APP Sensor 1 | Accelerator pedal not actuated | 0.7-1.2 Volts | This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 1 signal circuit as measured by the control module.
Accelerator pedal fully actuated | 4.2-4.5 Volts
APP Sensor 2 | Accelerator pedal not actuated | 0.3-0.5 Volts | This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 2 signal circuit as measured by the control module.
Accelerator pedal fully actuated | 2.2-2.5 Volts
APP Sensor 1 and 2 | -- | Agree | This parameter displays Disagree if the control module detects the signal voltage from APP sensor 1 is not in correct relationship to APP sensor 2. The scan tool displays Agree under the normal operating conditions.
APP Sensors | -- | Varies | This parameter displays the average of the APP sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in counts.
Average Total Fuel Trim Bank 1 and 2 | -- | -100 to +100% | This parameter displays the overall fuel trim from the Long Term idle/decel parameter and the Long Term Fuel Trim cell.
BARO | -- | 65-104 kPa (8-16 psi) | This parameter displays the barometric pressure. The control module uses the barometric pressure sensor input for fuel control to compensate for altitude differences.
BARO Sensor | -- | 2.5-4.0 Volts | This parameter displays the barometric pressure sensor voltage.
Boost Pressure Sensor | -- | kPa | This parameter displays the turbo charger boost sensor pressure.
Boost Pressure Sensor | -- | Volts | This parameter displays the turbo charger boost sensor voltage.
Brake Lamps Brake Pedal Switch Signal | Brake pedal not actuated | Released | This parameter displays the position of the stop lamp pedal switch input to the control module.
Brake pedal fully actuated | Applied
Brake Pedal Position Circuit Signal | Released | Applied/Released | This parameter displays the serial data message of the brake signal from the electronic brake control module (EBCM).
Brake Pedal Position Signal | Released | Applied/Released/Invalid | This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).
Calculated Air Flow | -- | g/s Varies | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s).
Calculated Catalyst Temperature | -- | 414°C (773°F) | This parameter displays the catalytic converter temperature as calculated by the control module.
Calculated ECT - Closed Loop Fuel Control | -- | -39 to +40°C (-38 to +104°F) | This parameter displays the modeled temperature that the control module calculates from air entering the engine, coolant temperature, and ambient air temperature. If the actual engine coolant temperature does not reach this calculated temperature within a predetermined amount of time, a DTC will set.
Calculated ECT - Thermostat Diagnosis | -- | -39 to +140°C (-38 to +284°F) | This parameter displays the modeled temperature that the control module calculates from air entering the engine, coolant temperature, and ambient air temperature. If the actual engine coolant temperature does not reach this calculated temperature within a predetermined amount of time, a DTC will set.
Calculated Engine Oil Temperature | -- | -39 to +140°C (-38 to +284°F) | This parameter displays the engine oil temperature.
Camshaft Position Sensor | -- | RPM | This parameter displays the speed of the engine as calculated by the signal from the camshaft position (CMP) sensor, shown in RPM.
Catalyst Monitor Complete This Ignition Cycle | -- | Yes | This parameter displays the monitor completion status during the current driving/monitoring cycle.
Catalyst Monitor Enabled this Ignition Cycle | -- | Yes | This parameter displays the monitor enable status during the current driving/monitoring cycle.
Clutch Pedal Starter Inhibit Switch (If Equipped) | Clutch pedal not actuated | Released | This parameter displays the state of the clutch pedal as determined by the control module from the clutch start switch.
Clutch pedal fully actuated | Applied
Clutch Pedal Switch (If Equipped) | Clutch pedal not actuated | Released | This parameter displays the state of the clutch pedal as determined by the control module from the clutch pedal switch.
Clutch pedal fully actuated | Applied
Cold Startup | -- | Yes/No | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle.
Control Module Voltage Signal | -- | 14.25 volts | This parameter displays the state of the ignition system voltage available at the control module.
Cooling Fan Relay 1 Command | Engine coolant less than 108°C (226°F) A/C Off | Off | This parameter displays the control module commanded state of the fan relay control circuit.
Engine coolant greater than 108°C (226°F) A/C On | On
Cooling Fan Relay Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to a voltage.
Cooling Fan Relay Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Cooling Fan Relay Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Cooling Fan Relays 2 and 3 Command | Engine coolant less than 108°C (226°F) A/C Off | Off | This parameter displays the control module commanded state of the fan relay control circuit.
Engine coolant greater than 108°C (226°F) A/C On | On
Cooling Fan Relays 2 and 3 Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to a voltage.
Cooling Fan Relays 2 and 3 Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Cooling Fan Relays 2 and 3 Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Crank Request Signal | Ignition switch not in the crank position | No | This parameter displays whether the ignition switch has been cycled to the crank position requesting the control module to activate the starter relay.
Ignition switch in the crank position | Yes
Crankshaft Position Active Counter | -- | Counts | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position sensor (CKP).
Crankshaft Position Resync Counter | -- | 0 Counts | This parameter displays the number of times the control module re-syncs with the CKP sensor.
Cruise Control | -- | Inactive | This parameter displays the status of the cruise control system as determined by the control module.
Cruise Control Disengage History 1-8 | Cruise ON | Reason for Cruise Disengagement | The parameter displays the last 8 cruise control disengages in order from 1 to 8, with 8 being the most recent. There are about 33 possible causes for the cruise control to disengage
Cruise Control Inhibit Reason | -- | Reason for Cruise Inhibit | The parameter displays the reason why the cruise control system is inhibited.
Cruise Control Inhibit Signal Command | -- | Yes/No | The parameter displays if the cruise control system is inhibited.
Cruise Control On/Off Switch | -- | On/Off | The engine control module (ECM) monitors the signal circuit of the cruise control switch. A closed switch is displayed as On.
Cruise Control Resume/Acceleration Switch | -- | Active/Inactive | The scan tool displays On, when the cruise On/Off switch is ON and the resume/accel (+) button is pressed, the ECM detects a predetermined voltage value for the resume/accel. switch.
Cruise Control Set/Coast Switch | -- | Active/Inactive | The scan tool displays On, when the cruise on/off switch is ON and the ECM detects a predetermined voltage value for the set/coast (-) switch.
Current Gear | Transmission in Park/Neutral | P/N | This parameter displays the transmission gear commanded by the transmission control module.
Transmission not in Park/Neutral | Reverse/1st-6th
Cycles of Misfire Data | -- | 0-200 counts | This parameter displays the number of misfire tests during 200 engine revolutions.
Cylinder 1-6 Current Misfire Counter | -- | 0 | The scan tool displays a range of 0-200 counts. This parameter displays the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.
Cylinder 1-6 History Misfire Counter | -- | 0 | The scan tool displays a range of 0-65,535 counts. The misfire history counters display the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire DTC P0300 has become active. The misfire history counters will update every 200 cylinder firing events.
Cylinder 1-6 Injector Command | Engine idling | 0.82-1.20 ms | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.
Cylinder 1-6 Injector Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is shorted to voltage.
Cylinder 1-6 Injector Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is shorted to ground.
Cylinder 1-6 Injector Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is open.
Cylinder 1-6 Injector Disabled - Misfire Detected | Engine idling | No | This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.
Cylinder 1-6 Knock Detected | -- | No | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event.
Cylinder 1-6 Knock Retard | -- | 0 Degrees | This parameter displays the knock retard as commanded by the control module for cylinders 1-6. Each cylinder is controlled individually based on both knock sensor signal inputs.
Deceleration Fuel Cut-Off | -- | Inactive | This parameter displays the status of the operating mode of the control module used to turn off the fuel injectors and the EVAP canister purge valve during certain deceleration conditions.
Desired Exhaust Camshaft Position Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays the desired exhaust camshaft angle as commanded by the control module.
Engine speed at 2000 RPM | 10 Degrees
Desired Idle Speed | -- | Approximately 650 RPM | This parameter displays the desired engine idle speed as commanded by the control module.
Desired Intake Camshaft Position Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays the desired intake camshaft angle as commanded by the control module.
Engine speed at 2000 RPM | 10 Degrees
Desired Throttle Position | -- | 0-100% | This parameter displays the desired TP angle commanded by the control module.
Distance Since DTC Cleared | -- | km - miles | This parameter displays the mileage that has elapsed since any diagnostic trouble code (DTC) has been cleared from the control modules memory.
Distance Since First Malfunction | -- | km - miles | This parameter displays the mileage that has elapsed since the first emission failure.
Distance Since Last Malfunction | -- | km - miles | This parameter displays the mileage that has elapsed since the last emission failure.
ECM in Immobilizer Fail Enable Mode | -- | No | This parameter indicates whether or not the engine control module (ECM) is in failure enable mode for the vehicle theft deterrent (VTD) system.
ECT Sensor | -- | 88 to 105°C (190 to 221°F) | This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor.
Electric Power Management Inhibit Reason | -- | Reason | This parameter displays the source of the Regulated Voltage Control (RVC) override command. RVC lowers system operating voltage to reduce system electrical load and improve fuel economy performance. The RVC command will be overridden if the voltage commanded is below the minimum system voltage required to ensure that the fuel demand, Powertrain OBD diagnostics, airflow measurement, or Transmission Control Module functions will execute properly. The RVC function can also be overridden through device controls.
Engine Controls Ignition Relay Command | -- | On | This parameter displays the state of the control circuit for control module power relay as commanded by the control module.
Engine Controls Ignition Relay Control Circuit High Voltage Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to voltage.
Engine Controls Ignition Relay Control Circuit Low Voltage Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Engine Controls Ignition Relay Control Circuit Open Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Engine Controls Ignition Relay Feedback Signal | -- | 12.0-14.5 Volts | This parameter displays the voltage available at the EC ignition relay pin of the control module.
Engine Load | Engine Idling | 25-45% | This parameter displays the calculated engine load in percent based on inputs to the control module from various engine sensors.
Engine speed at 2,500 RPM | 40-60%
Engine Off Time | Engine OFF | 0:00:00 Seconds - Varies | This parameter displays the amount of time that has elapsed since the engine was last cycled OFF.
Engine Oil Level Switch | -- | OK | This parameter displays if the level of the engine oil is within range as determined by the control module from information received from the engine oil level switch.
Engine Oil Life Remaining | -- | 0-100% | This parameter displays the percent of engine oil life remaining. The controller calculates the engine oil life by monitoring engine load, coolant temperature, and engine speed.
Engine Oil Pressure Sensor | -- | 103 kPa (15 psi) to 241 kPa (35 psi) | This parameter displays the engine oil pressure.
Engine Oil Pressure Sensor | -- | Varies | This parameter displays the engine oil pressure sensor voltage.
Engine Run Time | Engine Operating | 0:00:00 Increments when the engine is operating | This parameter displays the time elapsed since the engine was started.
Engine Speed | Engine Cranking | Greater than 60 RPM | This parameter displays the speed of the engine crankshaft rotation from information received from the crankshaft position (CKP) sensor. If there is a CKP sensor DTC, the ECM calculates the engine speed from one of the camshaft position (CMP) sensors.
Engine Idling | 550-700 RPM
EVAP Purge Solenoid Valve Command | -- | 0-100% | This parameter displays the on-time or duty cycle of the EVAP canister purge solenoid commanded by the control module. Zero percent indicates no purge. One hundred percent indicates full purge.
EVAP Purge Solenoid Valve Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is shorted to voltage.
EVAP Purge Solenoid Valve Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is shorted to ground.
EVAP Purge Solenoid Valve Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is open.
Exhaust Camshaft Position Active Counter Bank 1 or Bank 2 | -- | 0-255 | This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position (CMP) sensor.
Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage.
Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground.
Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open.
Exhaust Camshaft Position Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays the actual exhaust camshaft position in degrees.
Engine speed at 2000 RPM | 10 Degrees
Exhaust Camshaft Position Command Bank 1 or 2 | Engine Idling | 20% | This parameter displays the exhaust camshaft position in percent of range as commanded by the control module.
Engine speed at 2000 RPM | 50%
Exhaust Camshaft Position Variance Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position.
Engine speed at 2000 RPM | 10 Degrees
Extended Travel Brake Pedal Position Signal | -- | Released | This parameter will display the state of the brake pedal.
Fuel Control Loop Status Sensor 1 or 2 | -- | Closed Loop | This parameter displays the state of the fuel control system as commanded by the control module. Closed Loop operation indicates that the control module is controlling the fuel delivery based off the oxygen sensors input signal. In Open Loop operation the control module ignores the oxygen sensor input signal and bases the amount of fuel to be delivered on other sensor inputs.
Fuel Enrichment - Hot Catalyst | -- | No | This parameter displays if the control module is commanding catalytic converter protection.
Fuel Level Sensor | -- | 0-100% | This parameter displays the amount of fuel in the fuel tank in percent of range, as calculated by the control module.
Fuel Level Sensor Left Tank (Secondary) or Fuel Level Sensor Right Tank (Primary) | -- | 0-5 Volts | This parameter displays the voltage signal received by the control module from the fuel level sensors.
Fuel Pump Enable Command | Ignition ON, engine OFF | Fuel pump on for 2 seconds | This parameter displays the control modules commanded state of the fuel pump control circuit.
Engine idling | On
Fuel Pump Enable Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the fuel pump relay control circuit. The parameter displays Fault if the fuel pump relay control circuit is shorted to voltage.
Fuel Pump Enable Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the fuel pump relay control circuit. The parameter displays Fault if the fuel pump relay control circuit is shorted to ground.
Fuel Pump Enable Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the fuel pump relay control circuit. The parameter displays Fault if the fuel pump relay control circuit is open.
Fuel Tank Rated Capacity | -- | 17.8 Gallons (67.3 Liters) | This parameter displays the capacity of the fuel tank in liters or gallons.
Fuel Trim Learn | -- | Enabled | This parameter displays Enabled when conditions are appropriate for enabling long term fuel trim corrections. This indicates that the long term fuel trim is adapting continuing amounts of short term fuel trim. If the scan tool displays Disabled, then long term fuel trim will not respond to changes in short term fuel trim.
Generator F-Terminal Signal | -- | 0-100% | This parameter displays the amount of generator on-time as commanded by the control module. The higher the percentage the greater the generator output.
Generator L-Terminal Circuit High Voltage Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to voltage.
Generator L-Terminal Circuit Low Voltage Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Generator L-Terminal Circuit Open Test Status | -- | OK/Fault/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Generator L-Terminal Command | -- | 0-100% | This parameter displays the control modules commanded state of the voltage regulator on the generator.
HO2S 1 | -- | 50-900 mV - Varies | This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust.
HO2S 2 | -- | 400-700 mV - Varies | This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust.
HO2S 1 or 2 Heater Command | -- | 0-100% | This parameter displays the HO2S heater ON time in percentage, as commanded by the control module.
HO2S 1 or 2 Heater Command | -- | ON/OFF | This parameter display the state of the HO2S heater control circuit as commanded by the control module.
HO2S Heater Control Circuit High Voltage Test Status Sensor 1 or 2 | -- | OK/Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is shorted to voltage.
HO2S Heater Control Circuit Low Voltage Test Status Sensor 1 or 2 | -- | OK/Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is shorted to ground.
HO2S Heater Control Circuit Open Test Status Sensor 1 or 2 | -- | OK/Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is open.
HO2S Heater Monitor Complete This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.
HO2S Heater Monitor Enabled This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.
HO2S Module Signal Sensor 1 | -- | 1-5 Volts | This parameter displays the voltage of the HO2S control transistor, which is internal to the ECM.
HO2S Sensing Element Sensor 1 | -- | 70-90 Ohms Depends on Temperature | This parameter displays the resistance of the sensing element within the control module.
HO2S Sensing Element Sensor 2 | -- | 20-300 Ohms Depends on Temperature | This parameter displays the resistance of the sensing element within the control module.
IAT Sensor | -- | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the air entering the air induction system based on input to the control module from the intake air temperature (IAT) sensor.
Ignition 1 Signal | -- | B+ | This parameter displays B+ when the control module detects a voltage at the ignition 1 input terminal.
Ignition 1 Signal | -- | On | This parameter displays On when the control module detects a voltage at the ignition 1 input terminal.
Ignition Accessory Signal | -- | On | This parameter displays On when the control module detects a voltage at the ignition 0 input terminal.
Ignition Coil 1-6 Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is shorted to voltage.
Ignition Coil 1-6 Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is shorted to ground.
Ignition Coil 1-6 Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is open.
Ignition Off Time | -- | Varies | This parameter displays the time that the ignition has been off prior to the result of the high sided coolant rationality diagnostic being reported. This parameter will read zero and will be updated only if the High Side Coolant Rationality test is enabled. The enable criteria is based on engine soak time, engine coolant temperature and engine intake air temperature.
Immobilizer Automatic Learn Timer | -- | Inactive | This parameter indicates that either the auto learn timer, used in the auto learn procedure to enable the immobilizer password learning, or the seed and key timer (used in the seed and key procedure to enable immobilizer password learning) is active.
Immobilizer Fuel Disable | -- | Inactive | This parameter indicates the immobilizer system has disabled fuel.
Immobilizer Fuel Disable Until Ignition Off | -- | No | This parameter indicates the immobilizer system has disabled fuel for the remainder of the ignition cycle.
Immobilizer Fuel Enable | -- | No | The fuel enable indicates that the immobilizer system has decided not to disable fuel for the remainder of the ignition cycle based upon the receipt of the correct immobilizer password.
Immobilizer Password Learned | -- | Yes | This indicates learning of the password received from the platform electronics is enabled. immobilizer password learning is first enabled in assembly plant (prior to the manufacturer’s enable counter being set to zero) may be re-enabled using 1 of 2 procedures.
Intake Camshaft Position Active Counter Bank 1 or 2 | -- | 0-255 | This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor.
Intake Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage.
Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground.
Intake Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status Bank 1 or Bank 2 | -- | OK/Not Run | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open.
Intake Camshaft Position Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays the actual intake camshaft position in degrees.
Engine speed at 2000 RPM | 10 Degrees
Intake Camshaft Position Command Bank 1 or 2 | Engine Idling | 20% | This parameter displays the intake camshaft position in percent of range as commanded by the control module.
Engine speed at 2000 RPM | 50%
Intake Camshaft Position Variance Bank 1 or 2 | Engine Idling | 0 Degrees | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual exhaust camshaft position.
Engine speed at 2000 RPM | 0 Degrees
Knock Retard | -- | 0 Degrees | This parameter indicates the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensors.
KS 1 or 2 Signal | -- | 3.86-5.02 Volts | This parameters displays the voltage input to the control module from the knock sensor (KS).
Low Engine Oil Level Indicator Command | -- | Off | This parameter displays the commanded state of the low engine oil level lamp control circuit by the control module.
Low Engine Oil Pressure Indicator Command | -- | Off | This parameter displays the commanded state of the low engine oil pressure lamp control circuit by the control module.
Long Term Fuel Trim | -- | 0% | This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for cruise and acceleration conditions.
Long Term Fuel Trim Idle/Deceleration | -- | 0% | This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for idle and deceleration conditions.
MAF Performance Test | -- | OK | This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAF Sensor | Engine Idling | 3.4-6.3 g/s Varies with altitude | This parameter displays the measured quantity of air flowing into the engine.
Engine speed at 2,500 RPM | 11.88 g/s Varies with altitude
MAF Sensor | Engine Idling | 2,000-2,500 Hz Varies with altitude | The scan tool displays a range of 0-65,535 hertz. This parameter displays the frequency signal input to the control module, and represents measured quantity of air flowing into the engine.
MIL Command | -- | Off | This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module.
MIL Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is shorted to voltage.
MIL Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is shorted to ground.
MIL Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is open.
MIL Requested by DTC | -- | No | This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs.
Moderate Brake Apply Signal | Brake pedal not actuated | Released | This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).
Brake pedal fully actuated | Applied
Not Run Counter | -- | 0 | This parameter indicates the number of ignition cycles without a pass or a failure reported since the first ignition cycle with a failure reported.
Number of DTC(s) | -- | 0 | This parameter indicates the number of diagnostic trouble codes (DTCs)
O2S/HO2S Monitor Complete This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.
O2S/HO2S Monitor Enabled This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.
Park/Neutral Switch (If Equipped) | Transmission in Park/Neutral | Park/Neutral | This parameter displays whether the transmission range selector is in park or neutral.
Transmission not in Park/Neutral | In Gear
Pass Counter | -- | 0 | This parameter indicates the number of ignition cycles with a pass reported and no failures reported since the first ignition cycle with a failure reported.
Power Enrichment | -- | Inactive | This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions.
Power Mode | -- | Off, Accessory, Run, Crank Request | This parameter displays the position of the ignition switch.
PRNDL | -- | Varies | This parameter displays the transmission range determined directly from the decoding of the PRNDL A, B, C, and P inputs that are based upon an internal mode switch.
Reduced Engine Power | -- | Inactive | This parameter displays whether the control module is commanding reduced engine power due to a throttle actuator control (TAC) system condition.
Remaining Fuel in Tank | -- | Liter/Gallon/percent - Varies | This parameter displays the amount of fuel in liters/gallons/percent that remains in the fuel tank as determined by the control module from information received from the fuel level sensors.
Replicated Transmission OSS Signal | -- | 0 | This parameter displays the replicated transmission output speed received from the transmission control module. Replicated output speed results from hardware in the TCM that re-transmits the transmission output speed sensor pulses to the ECM.
Reverse Position Switch | -- | OFF | This parameter displays whether the transmission range selector is reverse.
Secondary Air Injection Monitor Complete This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.
Secondary Air Injection Monitor Enabled This Ignition Cycle | -- | Yes | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.
Secondary Air Injection Pressure Sensor | -- | kPa | This parameter displays the secondary air injection system pressure.
Secondary Air Injection Pressure Sensor | -- | Volts | This parameter displays the secondary air injection system pressure input as a percentage of its reference voltage.
Secondary Air Injection Pump Relay Command | -- | OFF | This parameter displays the state of the control circuit as commanded by the control module.
Short Term Fuel Trim | -- | -3% to +3% | This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor 1 or 2. If the oxygen sensor indicates a lean air/fuel mixture, the control module will add fuel increasing the short term fuel trim above 0. If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce fuel decreasing the short term fuel trim below 0.
Spark | -- | 2-10 Degrees | This parameter displays the amount of spark advance the control module is commanding on the ignition control circuits. The control module determines the desired advance.
Starter Relay Command | Ignition switch not in the crank position | Off | This parameter indicates whether the control module is commanding the starter relay ON or OFF.
Ignition switch in the crank position | On
Starter Relay Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is shorted to voltage. This parameter may not change if the scan tool is used to command the relay control circuit ON.
Starter Relay Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is shorted to ground. This parameter may not change if the scan tool is used to command the relay control circuit ON.
Starter Relay Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is open. This parameter may not change if the scan tool is used to command the relay control circuit ON.
Start-Up ECT | -- | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the engine coolant on start up based on input to the control module from the ECT sensor.
Start-Up IAT | -- | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the intake air at start in the air induction system based on input to the control module from the IAT sensor.
TAC Forced Engine Shutdown | -- | No | This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled.
TAC System Learned Counter | -- | 0 | This parameter displays the steps counted in learning the throttle actuator control parameters. The last step learned is 11.
TCC/Cruise Control Brake Pedal Switch | -- | Released | This parameter displays that the state of the redundant discrete brake switch input to the controller indicates that the brake is applied.
TCC Status | -- | Unlocked | This parameter displays the commanded status of the torque convertor clutch.
TCM Requested Torque | -- | N·m/lb ft | This parameter displays the calculated amount torque requested of the controller.
TCM Torque Increase | -- | No | This parameter displays whether or not the controller has responded to a request for a torque increase.
TCM Torque Reduction | -- | No | This parameter displays whether EBTCM has determined a reduction in torque took place.
Throttle Position | -- | 0-100% | This parameter displays the percent of throttle opening as calculated by the control module using information from the TP sensors.
Throttle Position Performance Test | -- | OK | This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
Throttle Position Sensor 1 | -- | 0.5-0.8 Volts | This parameter displays the actual voltage on the TP sensor 1 signal circuit as measured by the control module.
Throttle Position Sensor 1 Learned Minimum | -- | 0-0.6 Volts | This parameter displays the learned minimum value of throttle position (TP) sensor 1 as recorded by the control module during the last learn procedure.
Throttle Position Sensor 2 | -- | 4.7-4.1 Volts | This parameter displays the actual voltage on the TP sensor 2 signal circuit as measured by the control module.
Throttle Position Sensor 2 Learned Minimum | -- | 5.0-3.7 Volts | This parameter displays the learned minimum value of TP sensor 2 as recorded by the control module during the last learn procedure.
Throttle Position Sensors 1 and 2 | -- | Agree | This parameter displays Disagree when the control module detects that TP sensor 1 voltage signal is not within the correct relationship to TP sensor 2. The scan tool displays Agree under the normal operating conditions.
Torque Delivered Signal | -- | 0-100% | This is the calculated torque output from the engine to the transmission used by the EBTCM for the traction control system operation.
Torque Request Signal | -- | 0-100% | The EBTCM sends a Desired Torque Level signal request to the control module. This decreases torque from the powertrain in order to reduce wheel slip during acceleration for the traction control.
Total Misfire Count | -- | 0 | This parameter displays the total number of cylinder firing events that the control module detected as misfires for the last 200 crankshaft revolution sample period.
Total Knock Retard | -- | Degree | This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.
Total Misfire | -- | 0 | This parameter displays the number of possible misfires during the last 200 cylinder firing events detected on all cylinders as calculated by the control module. The misfires are calculated based on engine crankshaft rotation speed variations. The scan tool displays an incrementing counter.
Traction Control Status | -- | Inactive | This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control.
Traction Control Torque Delivered Signal | -- | Varies | This parameter indicates the torque delivered from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.
Traction Control Torque Increase | -- | No | This parameter displays whether or not the controller has responded to a request for a torque increase.
Traction Control Torque Reduction | -- | No | This parameter displays whether the transmission control module (TCM) is reducing torque.
Traction Control Torque Request Signal | -- | Varies | This parameter indicates the torque requested from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.
Turbocharger Bypass Solenoid Valve Command | -- | OFF | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Turbocharger Bypass Solenoid Valve Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to voltage.
Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Turbocharger Bypass Solenoid Valve Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Turbocharger Wastegate Solenoid Valve Command | -- | ON/OFF | This parameter displays the state of the control circuit as commanded by the control module.
Turbocharger Wastegate Solenoid Valve Control Circuit High Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to voltage.
Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is shorted to ground.
Turbocharger Wastegate Solenoid Valve Control Circuit Open Test Status | -- | OK/Not Run | This parameter displays the state of the control circuit. The parameter displays Fault if the control circuit is open.
Vehicle Speed Sensor | -- | Km/h mph | This parameter displays the speed of the vehicle as calculated by the transmission control module (TCM) from information received from the vehicle speed sensor (VSS).
Volumetric Efficiency | Engine Idling | 5-25% | This parameter displays the calculated volumetric efficiency of the engine as calculated by the control module.
Engine speed at 2,500 RPM | 5-25%
Warm Ups Since DTC Cleared | -- | Counts | This parameter indicates the number of warm up cycles that have occurred Since DTCs were cleared. The scan tool will display a higher counts as more warm up cycles have occurred since the DTCs were cleared.

#### Engine Control Module (ECM) Scan Tool Output Controls

Output Control | Description
--- | ---
A/C Compressor Clutch Relay | The engine must be running and the ECM must receive an A/C request from the HVAC control module in order to enable the output control. The ECM de-energizes the A/C compressor clutch relay when you select OFF. The relay remains de-energized until you select ON.
Compression Test | This device control is used to set-up the engine for a compression test. The fuel pump, fuel injectors, and spark are all disabled. The throttle is opened to a wide open throttle (WOT) position. The extended crank feature is not active. The scan tool initiates the test when the following conditions are met:

• | Transmission in Park or Neutral

• | No transmission range switch DTCs set

• | There are no throttle actuator control system DTCs set

• | The engine speed is 0 RPM.

• | There are no CKP sensor DTCs set

• | The vehicle speed is 0 km/h (0 mph)

• | There are no VSS sensor DTCs set

Cooling Fan Relay 1 | This function activates the cooling fan relay 1. The normal commanded state of the fan relay is NONE. The ECM allows cooling fan relay control when the following conditions are met:

• | The ignition is ON or the engine is running

• | A/C compressor operation is not requested.

• | The engine coolant temperature is less than 106°C (224°F)

Cooling Fan Relay 2 & 3 | This function activates the cooling fan relay 2 and relay 3. The normal commanded state of the fan relays is NONE. The ECM allows cooling fan relay control when the following conditions are met:

• | The ignition is ON or the engine is running

• | A/C compressor operation is not requested.

• | The engine coolant temperature is less than 106°C (224°F).

Cylinder Power Balance | Note: The Misfire Current and Misfire History parameters may not increment when using this function. This function disables the selected fuel injector. The normal commanded state is None. The scan tool initiates the test when the following conditions are met:

• | The engine is operating and the engine idle is stable.

• | The vehicle speed is 0 km/h (0 mph).

• | There are no DTCs set for the vehicle speed sensor.

If the fuel injector was disabled for 30 seconds, fuel injector control is not allowed again on the same fuel injector for 60 seconds.

Engine Speed | This function controls the idle speed override in 25 RPM, 100 RPM, and 500 RPM increments, from the base idle speed to 1,400 RPM. The scan tool initiates the test when the following conditions are met:

• | The transmission is in park or neutral.

• | The engine speed is less than 1,000 RPM.

The engine speed will remain in the commanded state until cancelled by the scan tool.

EVAP Purge Solenoid | Note: The EVAP Purge Solenoid Command parameter may not change states when using this output control. This function controls the evaporative emission (EVAP) purge solenoid valve. The normal commanded state is NONE. The system will increase or decrease the amount of purge by changing the duty cycle of the purge valve in 10 percent increments within a range of 0-100 percent. The system remains in the commanded state until cancelled by the scan tool.
Exhaust Camshaft Position Actuator Bank 1 or 2 | This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 40 crankshaft degrees. The scan tool initiates the test when the following conditions are met:

• | The vehicle speed is 0 km/h (0 mph).

• | The transmission is in park or neutral.

• | The engine speed is between 1,000-1,400 RPM.

The system remains in the commanded state until cancelled by the scan tool.

Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 or 2 | This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:

• | The ignition is ON with the engine OFF.

• | No engine speed is detected.

The system remains in the commanded state until cancelled by the scan tool.

Fuel Control Loop Status | This function controls the heated oxygen sensor (HO2S) loop status. The commanded states include NONE, OPEN, and CLOSED. The normal commanded state is NONE. The loop status changes as commanded, OPEN or CLOSED. The system remains in the commanded state until cancelled by the scan tool.
Fuel Injector Balance (If equipped) | This function enables the fuel injector in order to verify the correct fuel injector flow. The ECM will pulse the selected fuel injector when the following conditions are met:

• | All instruction on the scan tool is complete.

• | A fuel injector is selected.

• | The ignition is ON with the engine OFF.

The selected fuel injector can only be flowed/pulsed once per ignition cycle.

Fuel Pump Relay | This function controls the fuel pump relay. The normal commanded state is NONE. The scan tool initiates the test when the following conditions are met:

• | There are no vehicle speed sensor DTCs set.

• | The vehicle speed is 0 km/h (0 mph).

When commanded ON/OFF, the engine control module (ECM) turns the fuel pump relay ON/OFF. If the engine is running and the fuel pump relay is commanded OFF, the engine will stall. The system remains in the commanded state for about 2 seconds or until cancelled by the scan tool or the ECM detects a vehicle speed.

Fuel Trim Enable | This function enables or disables the ECM fuel trim learning. The normal commanded state is None.
Fuel Trim Reset | This function resets the fuel trim data and the learned values for the rear heated oxygen sensors.
Generator L-Terminal | This function is used to override the state of the generator L terminal output. The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. The scan tool initiates the test when the following conditions are met:

• | The engine is operating to turn OFF the component

• | The vehicle speed is 0 km/h (0 mph)

• | Transmission in Park or Neutral

• | In the correct power mode

• | The output control timer has not expired

Idle Learn | This function allows the throttle position and the idle speed to be relearned by the ECM, once the following conditions have been met.

• | The ignition is ON with the engine OFF.

• | The ECT is between 5-85°C (41-185°F).

• | No throttle actuator control (TAC) system DTCs are set.

Idle Spark | Disables and enables idle spark advance with the engine running.
Intake Camshaft Position Actuator Bank 1 or 2 | This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 40 crankshaft degrees. The scan tool initiates the test when the following conditions are met:

• | The vehicle speed is 0 km/h (0 mph).

• | The transmission is in park or neutral.

• | The engine speed is between 1,000-1,400 RPM.

The system remains in the commanded state until cancelled by the scan tool.

Intake Camshaft Position Actuator Solenoid Valve Bank 1 or 2 | This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:

• | The ignition is ON with the engine OFF.

• | No engine speed is detected.

The system remains in the commanded state until cancelled by the scan tool.

Malfunction Indicator Lamp (MIL) | This function controls the malfunction indicator lamp (MIL). The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the MIL ON/OFF. The system remains in the commanded state until cancelled by the scan tool.
Secondary Air Injection Pump Relay | This function controls the secondary air injection pump relay. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the pump relay ON/OFF. The system remains in the commanded state until cancelled by the scan tool. The scan tool initiates the test when the following conditions are met:

• | The engine coolant temperature is greater than a predetermined temperature.

• | The AIR pump has not been enabled for greater than 30 seconds.

Starter Relay | This function is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON. The scan tool initiates the test when the following conditions are met:

• | The engine speed is 0 RPM

• | There are no CKP sensor DTCs set

• | The vehicle speed is 0 km/h (0 mph)

• | There are no VSS sensor DTCs set

• | There are no theft deterrent DTCs set

• | Transmission is in Park or Neutral

• | No transmission range switch DTCs set

• | There are no TAC system DTCs set

• | The ignition voltage is within range

• | In the correct power mode

• | Not enough time has elapsed since the last time the starter has been enabled with a scan tool

Throttle Position | This function controls the throttle valve in 10 percent increments. The scan tool initiates the test when the following conditions are met:

• | There are no vehicle speed sensor DTCs set.

• | The vehicle speed is 0 km/h (0 mph).

• | The ignition is ON, with the engine OFF.

• | The ECM is not commanding a throttle learn.

The system remains in the commanded state until cancelled by the scan tool.

Turbocharger Bypass Solenoid Valve | This function controls the duty cycle of the turbocharger bypass valve. The normal commanded state is NONE. The system will increase or decrease the on time by changing the duty cycle of the solenoid in 10 percent increments within a range of 0-100 percent. The scan tool initiates the test when the following conditions are met:

• | The ignition switch is in the Run/crank position.

• | The control is not allowed during boost

• | The output control timer has not expired.

Turbocharger Wastegate Solenoid Valve | This function controls the duty cycle of the turbocharger wastegate valve. The normal commanded state is NONE. The system will increase or decrease the on time by changing the duty cycle of the solenoid in 10 percent increments within a range of 0-100 percent. The scan tool initiates the test when the following conditions are met:

• | The ignition switch is in the Run/crank position.

• | An over boost condition is not detected.

• | The output control timer has not expired.

## Engine Control Module Scan Tool Information 2.0L LDK

Table 1: | Engine Control Module Scan Tool Data Parameters
Table 2: | Engine Control Module Scan Tool Output Controls

The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following is determined:

• | The Diagnostic System Check - Vehicle is completed.

• | No diagnostic trouble codes (DTCs)

• | On-board diagnostics are functioning properly.

The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for the 2.0L engine for diagnosis.

#### Engine Control Module Scan Tool Data Parameters

Parameter | System State | Expected Value | Description
--- | --- | --- | ---
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released
5-Volt Reference 1 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5-Volt Reference 2 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5-Volt Reference 3 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+, or open circuit is present.
A/C Disengage 1-8 History | -- | Varies | This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot.
A/C High Side Pressure Sensor | -- | 1.43 Volts | The scan tool displays 0-5 volts. This is the A/C refrigerant pressure sensor voltage signal.
A/C On | 2.39 Volts
A/C High Side Pressure Sensor | -- | 868 kPa (125 psi) | The scan tool displays -103 to +3,119 kPa (-14 to +452 psi). This is the A/C refrigerant pressure sensor voltage signal converted to pressure.
A/C On | 1568 kPa (227 psi)
A/C Off for WOT | -- | No | This parameter indicates if the A/C system was commanded off for a wide open throttle event.
A/C Pressure Disable | -- | No | The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi).
A/C Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
A/C Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
A/C Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
A/C Relay Command | -- | Off | The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor clutch relay.
With A/C Selected | On
A/C Request Signal | -- | No | This parameter displays the state of the air conditioning (A/C) request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls. The scan tool will display Yes or No. Yes indicates the control module is receiving a request from the HVAC system to ground the A/C clutch relay control circuit, engaging the A/C compressor clutch. No indicates the control module is not receiving a request from the HVAC system to ground the A/C clutch relay control circuit.
With A/C Selected | Yes
Actual Fuel Rail Pressure | -- | -- | This parameter displays the fuel rail pressure as calculated by the control module using the signal from the fuel rail pressure (FRP) sensor. The actual fuel rail pressure is a range of values indicating a low pressure when the fuel rail pressure is low to a high pressure when the fuel rail pressure is high.
Air Flow Calculated | -- | 3-6 g/s | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s).
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle, in percent, of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
Accelerator pedal fully actuated | 100%
APP Sensors | -- | 0% | This parameter displays the average of the accelerator pedal position (APP) sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in percent.
APP Sensor 1 | Accelerator pedal not actuated | 0.94 Volts | This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
Accelerator pedal fully actuated | 4.27 Volts
APP Sensor 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2. The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions.
APP Sensor 2 | Accelerator pedal not actuated | 0.47 Volts | This parameter displays the voltage signal sent to the control module from APP sensor 2 of the APP sensor assembly. APP sensor 2 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
Accelerator pedal fully actuated | 2.10 Volts
Average Injector PWM | -- | 1 ms | This parameter indicates the average base pulse width modulation (PWM) or average ON time of the fuel injectors in milliseconds. When the engine load is increased, the injector pulse width will increase.
BARO | -- | 60-104 kPa (varies with altitude) | This parameter displays the barometric pressure that is received from the BARO sensor that is integrated within the ECM in kPa.
BARO Sensor | -- | 3 Volts | This parameter shows the barometric pressure in volts.
Boost Pressure Sensor | -- | 98 kPa | This parameter shows the TC boost pressure in kPa.
Boost Pressure Sensor | -- | 1.78 Volts | This parameter shows the Turbo Charger Boost sensor voltage.
Brake Booster Pressure Sensor | -- | 26 kPa | This parameter shows the brake booster pressure in kPa.
Brake Pedal Signal Status | -- | Released | The scan tool displays Applied, Valid, Released, or Invalid. This parameter shows the position of the brake pedal position sensor through the serial data bus.
Brake pedal depressed | Applied
Brake Pedal Signal Status | -- | -- | This parameter displays the serial data message of the brake signal from the electronic brake and traction control module (EBTCM).
Calc. TWC Temp. | -- | 446°C (834°F) | Calculated catalytic converter temperature.
Calculated ECT - Closed Loop Fuel Control | -- | Varies | This parameter shows the calculated temp used for closed loop control.
Calculated ECT - Thermostat Diagnosis | -- | Varies | This parameter shows the calculated temp for thermostat diagnosis.
Catalyst Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No
Catalyst Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
Catalytic Converter Protection Active | -- | No | This parameter displays the state of the Catalytic Converter Protection mode.
CKP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position (CKP) sensor.
CKP Resync Counter | -- | 0 Counts | This parameter displays the number of times the control module has to resynchronize the CKP sensor.
Clutch Start Switch (if equipped) | -- | Varies | This parameter displays the current state of the clutch pedal as determined by the control module. The scan tool will display Applied when the clutch pedal is depressed, and Released when the clutch pedal is not depressed.
Cmmd. A/F Equivalence Ratio | -- | 1.0:1 | Equivalence numbers greater than one represent excess fuel in the fuel air mix. Equivalence numbers less than one represent a deficiency of fuel in the fuel air mix for complete combustion. The equivalence ratio will be reported as one when the vehicle is in Closed Loop.
CMP Sensor | -- | RPM | This parameter will read zero unless there is a fault with the sensor. Then the value will increase to 255 and stop.
Cold Startup | -- | Varies | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle.
Control Module Voltage Signal | -- | 14.1 Volts | This parameter shows the control module voltage.
Cooling Fan Motor Command | -- | 0% | This parameter shows the percent of the pulse width modulated (PWM) duty cycle that the cooling fan motor is commanded.
CPP Learned Apply Position | -- | Volts | This parameter contains the position learned for the clutch pedal position sensor when the clutch pedal is fully applied during the associated learn procedure.
CPP Learned Release Position | -- | Volts | This parameter contains the position learned for the clutch pedal position sensor when the clutch pedal is released.
CPP Switch (If equipped) | -- | Released | This parameter displays the current state of the clutch pedal as determined by the control module.
Crank Request Signal | -- | No | This parameter shows the power mode status of the starter motor. When Yes is displayed, a request to engage the starter has been received by the ECM.
Ignition switch in the crank position | Yes
Cruise Disengage 1-8 History | -- | Varies | These parameters indicate the last 8 reasons the ECM disengaged the cruise control. Reason 1 contains the most recent reason. The reasons include the following: Brake Pedal Initialize, Cancel, Clutch, Coast Disengage, Coast Speed Low, TAC Inhibit, Accel Rate, Decel Rate, High Speed, Illegal Mode, Low Speed, None, Cruise Sw OFF, Over Set Speed, S/C On Speed Hi, ECM Inhibit, Simul S/C-R/A, TCS, Under Set Speed, DLC Override, Memory DTC, Eng Run Time, Engine Speed, DTC Set, RPM Limit, First Gear, APP Override, Low Voltage, D Whl Spd Low, D Whl Spd Hi, Cruise S/S, Cruise Sw Data, ECT Overtemp, VSES, Trans. DTC, BPP Data, BPP DTC, Park Brake, ACC Inhibit, ACC Brake DTC, ACC Option, ACC Brake Inop, PTO Active.
Cruise Control Active | -- | No | This parameter displays the status of the cruise control system as determined by the control module. The scan tool will display Yes when the cruise control system is in control of vehicle speed. The scan tool will display No when the cruise control system is not operating.
Cruise Inhibit Reason | -- | OFF | This parameter contains one of the last eight reasons that powertrain has disengaged cruise control. A FIFO history buffer, which retains its contents over a battery disconnect, is used to store these reasons with reason 1 containing the most recent reason.
Cruise Inhibited | -- | Yes | This parameter indicates the state of the cruise signal.
Cruise On/Off Switch | -- | Off | The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM).
Switch pressed | On
Cruise Resume/Accel. Switch | -- | OFF | The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM).
Switch pressed | ON
Cruise Set/Coast Switch | -- | OFF | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM).
Switch pressed | ON
Cycles of Misfire Data | -- | 0-100 Counts incrementing | This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the control module.
Cyl. 1-4 Inj. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 1-4 Inj. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 1-4 Inj. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Cyl. 1-4 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 1-4 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 1-4 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Cyl. 1-4 Knock Retard | -- | -- | This parameter displays the knock retard as commanded by the control module for cylinders 1-4. Each cylinder is controlled individually based on both knock sensor signal inputs.
Decel. Fuel Cutoff | -- | Inactive | This parameter displays the status of the operating mode used to turn off the fuel injectors during certain deceleration conditions. When the scan tool displays Active, the control module has turned off the fuel injectors. When the scan tool displays Inactive, the fuel system is operating normally.
Desired Exh. CMP | -- | 0 Degrees | This parameter displays the desired exhaust camshaft position, as determined by the control module. The scan tool will display a higher value for more advanced exhaust valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced exhaust valve timing, such as at idle.
Desired Fuel Rail Pressure | -- | 3.8 MPa | This parameter displays the desired fuel rail pressure as calculated by the control module. This value is calculated based on engine speed, engine load, and sensor inputs. The scan tool will display a higher value at higher engine speeds and loads, and a lower value at idle.
Desired HO2S 1 | -- | Varies | This parameter displays the desired heated oxygen sensor (HO2S) lambda value as commanded by the control module.
Desired Idle Speed | -- | 768 RPM | This parameter displays the engine idle speed in RPM commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine RPM at idle. This parameter is not valid unless the engine is running.
Desired Int. CMP | -- | 0 Degrees | This parameter displays the desired intake camshaft position, as determined by the control module. The scan tool will display a higher value for more advanced intake valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced intake valve timing, such as at idle.
Desired TC Boost | -- | 48 kPa | This parameter displays the desired turbocharger boost pressure as determined by the control module.
Distance Since DTC Cleared | -- | Varies | This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven.
EC Ign. Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EC Ign. Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EC Ign. Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EC Ignition Relay Feedback Signal | -- | 13.0-14.2 Volts | This parameter displays the voltage signal sent to the control module from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF.
EC Ignition Relay Command | -- | On | This parameter displays the commanded state of the EC ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module.
ECM in VTD Fail Enable | -- | No | This parameter indicates whether or not the engine control module (ECM) is in failure enable mode for the vehicle theft deterrent (VTD) system.
ECT Sensor | -- | 96-103°C (204-217°F) | This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature sensor. When the coolant temperature is low, the scan tool will display a low temperature. When the coolant temperature is high, the scan tool will display a high temperature.
Engine Load | -- | Varies | This parameter displays the engine load in percent based on inputs to the control module from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load.
Engine OFF EVAP Test Conditions Met | -- | -- | This parameter displays Yes if the Conditions for Running the engine OFF EVAP diagnostics are met.
Engine Oil Pressure Switch | -- | -- | This parameter displays the state of the engine oil pressure as determined by the control module. The control module monitors the engine oil pressure switch to determine if the engine oil pressure is sufficient. The scan tool will display low when the engine oil pressure is below a predetermined value.
Engine Oil Temperature Calculated | -- | 109°C (228°F) | This parameter displays the engine oil temperature.
Engine Off Time | -- | Varies | This parameter displays the time elapsed since the engine was shut OFF.
Engine Run Time | -- | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running.
Engine Speed | -- | 750-800 RPM | This parameter displays the speed of the crankshaft as determined by the control module using an input from the crankshaft position (CKP) sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds.
EVAP Fault History | -- | No Fault | This parameter displays the result of the evaporative emission (EVAP) system diagnostic. Scan tool displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK, WEAK VACUUM, or NO TEST RESULT. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM.
EVAP Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
EVAP Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
EVAP Purge Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EVAP Purge Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EVAP Purge Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EVAP Purge Solenoid Command | -- | 10-15% | This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the control module expressed as a percent. The scan tool will display a high percentage when the control module is commanding the EVAP purge solenoid to be open a large amount. The scan tool will display a low percentage when the control module is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the control module is commanding the EVAP purge solenoid closed.
EVAP Vent Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EVAP Vent Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EVAP Vent Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EVAP Vent Solenoid Command | -- | Venting | This parameter displays the state of the EVAP vent solenoid commanded by the control module expressed as Venting or Not Venting. The scan tool will display Venting when the control module is commanding the EVAP vent solenoid to be open. The scan tool will display Not Venting when the control module is commanding the EVAP vent solenoid to be closed.
Exh. CMP Active Counter | -- | 1-255 Counts | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor.
Exh. CMP Angle | -- | 0 Degrees | This parameter displays the degrees of advanced exhaust camshaft angle related to crankshaft position as determined by the control module based on input from the exhaust CMP sensor. The scan tool will display a higher value for a more advanced exhaust camshaft position. The scan tool will display a lower value when the exhaust camshaft is not being advanced, such as at idle.
Exh. CMP Command | -- | 6% | This parameter displays the exhaust camshaft position in percent of range as commanded by the control module.
Exh CMP Sol Bn 1 Ckt Open Test Status | -- | OK/Indeterminate | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open. The parameter displays Indeterminate until the circuit has been commanded ON.
Exh CMP Sol Bn 1 Ckt Short Gnd Test Status | -- | OK/Indeterminate | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground. The parameter displays Indeterminate until the circuit has been commanded ON.
Exh CMP Sol Bn 1 Ckt Short Volts Test Status | -- | OK/Indeterminate | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.
Exh. CMP Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position.
Extended Travel Brake Pedal Switch | -- | -- | This parameter will display the state of the brake pedal, applied or released.
FC Relay 1 Ckt Open Test Status | -- | OK/Indeterminate | This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open. The parameter displays Indeterminate until the circuit has been commanded ON.
FC Relay 1 Ckt Short Gnd Test Status | -- | OK/Indeterminate | This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to ground. The parameter displays Indeterminate until the circuit has been commanded ON.
FC Relay 1 Ckt Short Volts Test Status | -- | OK/Indeterminate | This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.
FRP Regulator Command | -- | 125 Degrees | This parameter displays the portion of the high fuel pressure pump stroke that delivers fuel to the fuel rail. The scan tool will display a higher value for a higher commanded pressure, and a lower value for a lower commanded pressure.
Fuel Level Sensor | -- | Varies | This parameter displays the approximate fuel level in the fuel tank as a voltage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full.
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Fuel Pump Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Fuel Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Fuel Pump Relay Command | -- | On | This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be ON when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be off when the scan tool indicates the Fuel Pump Relay Command is Off.
Fuel Rail Pressure Sensor | -- | 1.2-1.5 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the pressure inside the fuel rail. The scan tool will display a low voltage when the pressure in the fuel rail is low. The scan tool will display a high voltage when the pressure in the fuel rail is high.
Fuel Tank Level Remaining | -- | Varies 0-100% | This parameter displays the amount of fuel remaining in the fuel tank as a percentage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full.
0-61 Liters (0-16.2 gallons)
Fuel Tank Pressure Sensor | -- | -19.8 to +12.52 mm Hg/-10.5 to +6.17 in H2O | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high.
Fuel Tank Pressure Sensor | -- | 0.2-4.0 V | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low.
Fuel Tank Rated Capacity | -- | 61.2 Liters (16.2 Gallons) | This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle.
Fuel Trim Learn | -- | Enabled | This parameter indicates if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled.
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.
GEN F-Terminal Signal | -- | 45% Varies with electrical load | This parameter is an ECM input of the generator field duty cycle. This is an indication of generator load on the engine.
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
GEN L-Terminal Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
GEN L-Terminal Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
GEN L-Terminal Signal Command | -- | On | This parameter indicates the generator commanded state by the ECM.
HO2S Heater Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
HO2S Heater Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
HO2S / O2S Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
HO2S / O2S Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include Yes or No.
HO2S 1 Heater Command | -- | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON.
HO2S 1 Heater Command | -- | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded ON, and OFF if the heater is not commanded ON.
HO2S 1 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
HO2S 1 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
HO2S 1 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
HO2S 1 Sensing Element | -- | 300 Ohms | This parameter displays the resistance of the sensing element within the control module. The front sensors are normally regulated to 80 ohms. The rear sensors are normally regulated between 20-300 ohms which depends on temperature.
HO2S 2 | -- | 50-850 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop.
HO2S 2 Heater Command | -- | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON.
HO2S 2 Heater Command | -- | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded ON, and OFF if the heater is not commanded ON.
HO2S 2 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
HO2S 2 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
HO2S 2 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
HO2S 2 Sensing Element | -- | 100 Ohms | This parameter displays the resistance of the sensing element within the control module. The front sensors are normally regulated to 80 ohms. The rear sensors are normally regulated between 20-300 ohms which depends on temperature.
HO2S Sensor 1 Module Signal | -- | Varies | This parameter displays the voltage of the HO2S control transistor, which is internal to the control module.
IAT Sensor | -- | Varies | The scan tool displays °C/F. The ECM converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. The scan tool displays a range of -40 to +132°C (-40 to +270°F).
IAT Sensor 2 | -- | 15-60 °C (59-140°F) | This parameter displays the temperature of the air after the turbocharger and the charge air cooler, before it enters the intake manifold. Intake air temp is used by the ECM to adjust fuel delivery and spark timing according to incoming air density.
Ignition 1 Signal | -- | ON | This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position.
Ignition Off Time | -- | Varies | This parameter displays the time elapsed since the ignition was last turned off. The scan tool will display the time in hours, minutes, and seconds.
Initial Brake Apply Signal | -- | -- | This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).
Inj. 1-4 Disabled Due to Misfire | -- | No | This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.
Injector 1 Command | -- | Varies | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.
Injector 2 Command | -- | Varies | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.
Injector 3 Command | -- | Varies | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.
Injector 4 Command | -- | Varies | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.
Int CMP Sol Bn 1 Ckt Open Test Status | -- | OK/Indeterminate | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open. The parameter displays Indeterminate until the circuit has been commanded ON.
Int CMP Sol Bn 1 Ckt Short Gnd Test Status | -- | OK/Indeterminate | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground. The parameter displays Indeterminate until the circuit has been commanded ON.
Int CMP Sol Bn 1 Ckt Short volts Test Status | -- | OK/Indeterminate | This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.
Int. CMP Active Counter | -- | 0-255 Counts | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor.
Int. CMP Angle | -- | 0 Degrees | This parameter displays the actual intake camshaft position in degrees.
Int. CMP Command | -- | 6% | This parameter displays the intake camshaft position in percent of range as commanded by the control module.
Int. CMP Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position.
Knock Detected Cyl. 1-4 | -- | No | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event.
Knock Retard | -- | 0 Degrees | The scan tool displays Degrees. Indicates the amount of spark the PCM is removing from ignition control (IC) spark advance in response to the signal from the knock sensors. The traction control system desired torque signal from the electronic brake and traction control module (EBTCM) may cause knock retard to display a value more than 0.0 degrees if traction control is active.
KS 1 Signal | -- | Varies | This parameter displays the voltage input to the control module from the knock sensor (KS).
KS 2 Signal | -- | Varies | This parameter displays the voltage input to the control module from the knock sensor (KS).
Long Term FT | -- | -10 to +10% | The scan tool range is -99 to +99 percent. This parameter indicates the Long Term fuel trim (FT) correction for bank 1 as commanded by the ECM. A change made to the fuel delivery will be indicated by the Long and Short Term FT values. The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition.
Loop Status Sensor 1 | -- | Varies | Closed loop indicates that the ECM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the ECM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and mass air flow (MAF) sensor inputs only.
Loop Status Sensor 2 | -- | Varies | Closed loop indicates that the ECM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the ECM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and mass air flow (MAF) sensor inputs only.
LT FT Idle/Decel. | -- | 0% | This parameter displays the commanded Long Term Fuel Trim correction by the control module for idle and deceleration conditions.
MAF Sensor | -- | 3-6 g/s (varies with altitude) | The scan tool displays g/s. The scan tool displays a range of 0.0-655 g/s. The mass air flow (MAF) is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine.
MAF Sensor | -- | 1,200-1,300 Hz (varies with altitude) | The scan tool displays a range of 0-65,555 Hz. The MAF sensor is a hot wire type air flow sensor. The ECM converts current draw needed by the MAF to keep the hot wires at a constant temperature into a frequency signal. The scan tool displays this frequency in a hertz signal.
MAP Sensor | -- | 20-42 kPa (varies with altitude) | The scan tool displays kPa. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required.

The scan tool displays a range of 10-240 kPa.

MAP Sensor | -- | 0.80-1.30 Volts (varies with altitude) | The scan tool displays Volts. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required.

The scan tool displays a range of 0-5 volts.

MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
MIL Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
MIL Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
MIL Command | -- | Off | This parameter displays the commanded state of the MIL control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check.
MIL Requested by DTC | -- | No | This parameter shows if the illumination of the MIL has been requested by a failed diagnostic trouble code (DTC).
Misfire Current Cyl. 1-4 | -- | 0 Counts | The scan tool displays 0-255 counts. The display shows the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.
Misfire History Cyl. 1-4 | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
PNP Switch | -- | Park / Neutral | The scan tool displays the position of the transmission selection as Park/Neutral or In Gear.
Post Inj. Cyl. 1 Command | -- | 0 ms | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module for catalyst heating.
Post Inj. Cyl. 2 Command | -- | 0 ms | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module for catalyst heating.
Post Inj. Cyl. 3 Command | -- | 0 ms | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module for catalyst heating.
Post Inj. Cyl. 4 Command | -- | 0 ms | This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module for catalyst heating.
Power Enrichment | -- | Inactive | The scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the ECM has detected conditions appropriate to operate in Power Enrichment mode. The ECM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the ECM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occurring during acceleration.
Reduced Engine Power | -- | Inactive | The scan tool displays Active or Inactive. The scan tool displays Active when the ECM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The ECM limits the engine power.
Reverse Switch | -- | OFF | Manual Transmission Reverse Switch On indicates that the reverse switch hardwire input to the ECM is active.
Short Term FT | -- | -10 to +10% | The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition.
Spark | -- | 18-24 Degrees | The scan tool displays a range of -64 to +64°. The scan tool displays the amount of degrees the ECM commands. The ECM computes the desired spark advance using the following: (1) ECT, (2) engine speed (RPM), (3) load, (4) vehicle speed. The ECM adjusts the timing.

A negative (-) value indicates degrees before top dead center (BTDC) or spark advance; a positive value indicates degrees after top dead center (ATDC) or spark retard.

Starter Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Starter Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Starter Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Starter Relay Command | -- | Off | The scan tool displays ON or OFF. This displays the commanded state of the starter relay by the ECM.
Ignition switch in the crank position | On
Start-up ECT | -- | Varies | Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -40 to +150°C (-40 to +302°F). The scan tool displays the engine ECT at the time the engine was started. The ECM uses start-up ECT for certain DTCs.

Used to determine if the last startup was a cold start.

Start-up IAT | -- | Varies | Indicates the IAT at the time that the vehicle was started. Used to determine if the last startup was a cold start. The scan tool range is -40 to +132°C (-40 to +270°F).
System Power Mode | -- | Run | This parameter displays the position of the ignition switch.
TAC Forced Engine Shutdown | -- | No | This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled.
TC Bypass Sol Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger bypass solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open on the circuit.
TC Bypass Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger bypass solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is a short to ground on the circuit.
TC Bypass Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger bypass solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is a short to voltage on the circuit.
TC Bypass Solenoid Command | -- | On | This parameter shows the state of the turbocharger bypass solenoid. The scan tool shows either commanded on or off.
TC Wastegate Sol Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger wastegate solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open on the circuit.
TC Wastegate Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger wastegate solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is a short to ground on the circuit.
TC Wastegate Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the turbocharger wastegate solenoid. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is a short to voltage on the circuit.
TCM Requested Torque | -- | -- | Represents the PWM signal from the EBTCM. The EBTCM reduces the traction control desired torque signal pulse width when a drive wheel slippage situation is detected. The ECM monitors the traction control desired torque signal and reduces drive wheel slippage as necessary by retarding spark timing.
TCM Torque Reduction Active | -- | No | This parameter displays whether EBTCM has determined a reduction in torque took place.
TCS Torque Delivered Signal | -- | % | Represents the PWM signal which indicates the available torque the engine is delivering to the drive wheels. The EBTCM monitors the Traction Control Torque signal to ensure that the ECM is responding properly to the Traction Control Desired Torque signal.
TCS Torque Request Signal | -- | 0% | Scan tool range 0-100 percent. Represents the PWM signal from the electronic brake and traction control module (EBTCM). The EBTCM reduces the Traction Control Desired Torque signal pulse width when a drive wheel slippage situation is detected. The ECM monitors the Traction Control Desired Torque signal and reduces drive wheel slippage as necessary by retarding spark timing, decreasing boost sol. PWM, or increasing air/fuel ratio. The ECM can also turn OFF up to three fuel injectors if the Traction Control Desired Torque signal indicates a large enough amount of drive wheel slippage.
TCS Torque Reduction Active | -- | No | This parameter displays whether the transmission control module (TCM) is reducing torque.
Total Fuel Trim Average | -- | Varies | This parameter displays the overall fuel trim from the idle/decel cell and the cruise/accel cell.
Total Knock Retard | -- | 0 Degrees | This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.
Total Misfire | -- | -- | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
TP Desired Angle | -- | 6% | The scan tool displays %. The scan tool displays 0-100 percent. The ECM indicates the desired throttle angle commanded by the vehicle operator. The scan tool indicates the desired throttle angle commanded by the vehicle operator.
With Ignition On, Engine Off, Accelerator pedal not actuated | 11%
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100%
TP Indicated Angle | -- | 6% | This parameter displays the angle of the TP in percent. This information is calculated by the control module using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plate is closed. The scan tool will display a high percentage when the throttle plate is fully open.
With Ignition On, Engine Off, Accelerator pedal not actuated | 29%
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100%
TP Sensor 1 | -- | 4.06 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plate. This parameter is for sensor 1 of the TP sensor assembly. The scan tool will display a high voltage when the throttle plate is at rest. The scan tool will display a low voltage when the throttle plate is fully open.
With Ignition On, Engine Off, Accelerator pedal not actuated | 3.27 Volts
With Ignition On, Engine Off, Accelerator pedal fully actuated | 0.80 Volts
TP Sensor 1 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle.
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2. The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2.
TP Sensor 2 | -- | 0.90 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plate. This parameter is for sensor 2 of the TP sensor assembly. The scan tool will display a low voltage when the throttle plate is at rest. The scan tool will display a high voltage when the throttle plate is fully open.
With Ignition On, Engine Off, Accelerator pedal not actuated | 1.71 Volts
With Ignition On, Engine Off, Accelerator pedal fully actuated | 4.16 Volts
TP Sensor 2 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle.
Traction Control Status | -- | Inactive | This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control.
Vehicle Speed Sensor | -- | 0 km/h/mph | The scan tool range is 0-200 km/h (0-125 mph). This parameter displays the vehicle speed. The ECM receives reference pulses from the vehicle speed sensor (VSS) and converts them into km/h and mph for display.
Volumetric Efficiency | -- | 15-22% | This parameter displays the calculated volumetric efficiency of the engine as calculated by the control module.
VTD Auto Learn Timer | -- | Inactive | This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system.
VTD Fuel Disable | -- | Inactive | This parameter indicates the VTD system has disabled fuel.
VTD Fuel Disable Until Ign. Off | -- | No | This parameter indicates the VTD system has disabled fuel for the remainder of the ignition cycle.
VTD Fuel Enabled | -- | Yes | This parameter indicates that the VTD system has enabled the fuel system.
VTD Password Learned | -- | No | This parameter indicates if learning of the immobilizer secret information is enabled.
Warm-ups Since DTC Cleared | -- | Varies | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles since a DTC was cleared from memory. The scan tool displays counts.
Wastegate Solenoid Command | -- | 0% | This parameter shows the percent of the pulse width modulated (PWM) duty cycle that the wastegate solenoid is commanded.
Wide Open Throttle | -- | No | This parameter indicates the throttle status commanded by the control module. The scan tool will display YES if the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100%.

#### Engine Control Module Scan Tool Output Controls

Output Control | Description
--- | ---
A/C Relay | Air Conditioning Compressor Clutch Enable; Air Conditioning Compressor Clutch ON
CMP Actuator System | Exhaust Cam Phase Solenoid Bank 1 Enable; Exhaust Cam Phase Solenoid ON
CMP Actuator System | This function controls the exhaust camshaft position (CMP) actuator. The normal commanded state is 0 degrees. The system will INCREASE or DECREASE the exhaust camshaft timing by changing the duty cycle of the actuator in 5 degree increments up to 50 degrees. This also affects Desired Exh. CMP Angle.
CMP Actuator System | Intake Cam Phase Solenoid Bank 1 Enable; Intake Cam Phase Solenoid Bank 1 ON
CMP Actuator System | This function controls the intake CMP actuator. The normal commanded state is 0 degrees. The system will INCREASE or DECREASE the intake camshaft timing by changing the duty cycle of the actuator in 5 degree increments up to 40 degrees. This also affects Desired Int. CMP Angle.
Cooling Fan | Cooling Fan Speed Enable; Cooling Fan Speed
Cylinder Power Balance | Fuel Injector Enable; Fuel Injector ON
Engine Speed Control | Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 400-2,000 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool.
EVAP Service Bay Test | EVAP Service Test Trigger
EVAP System | Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -27 mm Hg (-14 in H2O).
EVAP System | Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -27 mm Hg (-14 in H2O).
EVAP System | Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -27 mm Hg (-14 in H2O).
Fuel Pump | Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running.
Fuel System | High Pressure Fuel Supply System Control - Demanded High Pressure
Fuel System | High Pressure Fuel Supply System Control - MSV Control At Engine Running "High Pressure Test"
Fuel Trim Enable | Disables the ECMs ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool.
Fuel Trim Reset | Activates the reset of fuel trim data in all fuel trim cells.
GEN L-Terminal | Generator L-Terminal Enable; Generator L-Terminal ON
Loop Status | Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool.
Malfunction Indicator Lamp | Malfunction Indicator Lamp Enable; Malfunction Indicator Lamp ON
Spark Control | Enables or disables idle spark command. When commanded ON, the idle spark will be controlled to 13 degrees before top dead center. The normal commanded state is OFF.
Special Durations | Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph.
Starter Relay Control | Starter Relay Enable Starter Relay ON
TC Bypass Solenoid | TC Bypass Solenoid Command ON/OFF
TC Wastegate Solenoid | Wastegate Solenoid Command 0-100%
Throttle Position | Operates TAC motor in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF.

## Engine Control Module Scan Tool Information 1.6L (LDE) and 1.8L (2H0)

Table 1: | Engine Control Module Scan Tool Data Parameters
Table 2: | Engine Control Module (ECM) Scan Tool Output Controls

The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following is determined:

• | The Diagnostic System Check - Vehicle is completed.

• | No diagnostic trouble codes (DTCs)

• | On-board diagnostics are functioning properly

The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

Note: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for engine diagnosis.

#### Engine Control Module Scan Tool Data Parameters

Parameter | System State | Expected Value | Description
--- | --- | --- | ---
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released
5 Volt Reference 1, 2, 3, or 4 | Ignition ON | 5 Volts | This parameter displays the voltage sensed on the 5-volt reference circuits at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage.
5 Volt Reference 1, 2, 3, or 4 | Ignition ON | OK | This parameter displays OK if there is no 5-volt reference circuit condition. If the circuit is shorted to ground or shorted to B+, fault is displayed.
A/C Disengage 1-8 History | A/C ON | Reason for A/C Disengagement | The parameter displays the last 8 air conditioning (A/C) compressor disengage reasons. The scan tool displays None, A/C Pressure, Engine Speed, Batt Voltage, Anti Stall, RPM Unstable, WOT, Launch Perf., or Coolant Hot.
A/C High Side Pressure | A/C OFF | 0.75 to 1.5 V* | This parameter displays the voltage from the A/C high side pressure sensor signal circuit to the control module. *Varies with temperature and relative humidity.
A/C ON | 1.3 to 2.5 V*
A/C High Side Pressure | A/C OFF Engine Speed at 2000 RPM | 450 to 650 kPa (65 to 95 (PSI) 1117 to 2350 kPa* (162 to 341 PSI)* | This parameter displays the pressure from the A/C high side pressure sensor signal circuit to the control module. *Varies with temperature and relative humidity.
A/C Off For WOT | A/C ON | No | This parameter displays whether the control module is commanding the A/C compressor clutch relay OFF for wide open throttle (WOT).
A/C Pressure Disable | A/C ON | No | This parameter displays whether the A/C pressure is out of range for normal operation as determined by the control module.
A/C Relay Ckt Open Test Status | A/C ON | Not Run | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
A/C Relay Ckt Short Gnd Test Status | A/C ON | Not Run | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
A/C Relay Ckt Short Volts Test Status | A/C ON | OK | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
A/C Relay Command | A/C ON | On | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit as commanded by the control module.
A/C Request Signal | A/C ON | Yes | This parameter displays the state of the A/C request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls.
Air Flow Calculated | -- | g/s Varies | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s).
Ambient Air Temp. | -- | °C °F Varies | This parameter displays the surrounding air temperature, at any given altitude.
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle of the accelerator pedal position (APP) as calculated by the control module using the signals from the APP sensors.
Accelerator pedal fully actuated | 100%
APP Sensor 1 | Accelerator pedal not actuated | 0.88 to 1.08 V | This parameter displays the actual voltage on the accelerator pedal position (APP) Sensor 1 signal circuit as measured by the control module.
Accelerator pedal fully actuated | 4.17 to 4.37 V
APP Sensor 2 | Accelerator pedal not actuated | 0.39 to 0.59 V | This parameter displays the actual voltage on the accelerator pedal position (APP) Sensor 2 signal circuit as measured by the control module.
Accelerator pedal fully actuated | 2.02 to 2.22 V
APP Sensor 1 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2. The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions.
APP Sensors | -- | 0% | This parameter displays the average of the APP sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
BARO | -- | 65 to 104 kPa (8 to 16 PSI) - Varies with altitude | This parameter displays the barometric pressure. The control module uses the barometric pressure sensor input for fuel control to compensate for altitude differences.
Calc. TWC Temp. | -- | °C °F Varies | This parameter displays the catalytic converter temperature as calculated by the control module.
Catalyst Monitor Complete This Ignition | -- | Yes / No | This parameter displays the monitor completion status during the current driving/monitoring cycle.
Catalyst Monitor Enabled This Ignition | -- | Yes / No | This parameter displays the monitor enable status during the current driving/monitoring cycle.
Catalytic Converter Protection Active | -- | No | This parameter displays if the control module is commanding catalytic converter protection.
CKP Active Counter | -- | Incrementing | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position sensor (CKP).
CKP Resync Counter | -- | Varies | This parameter displays the number of times the control module re-syncs with the CKP sensor.
CKP Sensor | -- | Engine Speed | This parameter displays the engine speed as calculated by the control module using the signal from the CKP sensor.
Cmmd. A/F Equivalence Ratio | -- | Ratio 1.0:1 | This parameter displays the air to fuel ratio based on throttle state. The control module changes the ratio for acceleration or deceleration.
CMP Active Counter | -- | 0 to 255 Counts | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position sensors (CMP).
CMP Sensor | -- | Engine Speed | This parameter displays the speed of the engine as calculated by the signal from the camshaft position (CMP) sensor, shown in RPM.
Control Module Voltage Signal | -- | B+ | This parameter displays the state of the ignition system voltage available at the control module.
CPP Learned Apply Position | -- | Volts | This parameter displays the position learned for the clutch pedal position sensor when the clutch pedal is fully applied during the associated learn procedure.
CPP Learned Release Position | -- | Volts | This parameter displays the position learned for the clutch pedal position sensor when the clutch pedal is released.
CPP Sensor | -- | % | This parameter displays the displacement of the clutch pedal (corrected and normalized based upon its learned released and fully applied positions), where 0 % corresponds to the clutch pedal being released and 100% corresponds to the clutch pedal being fully applied.
CPP Sensor | -- | Volts | This parameter displays the clutch pedal position sensor analog input as a percentage of its reference voltage.
Crank Request Signal | -- | No | This parameter displays whether the ignition switch has been cycled to the crank position requesting the control module to activate the starter relay.
Cruise Disengage 1-8 History | Cruise Control ON | Reason for Cruise Disengagement | The parameter displays the last 8 cruise control disengages in order from 1 to 8, with 8 being the most recent.
Cruise Inhibit Reason | Cruise Control ON | Varies | The parameter displays the reason why the cruise control system is inhibited.
Cycles of Misfire Data | -- | Incrementing 0 to 100 | This parameter displays the number of cylinder firing events recorded by the control module.
Cyl. 1-4 Injector Ckt Open Test Status | -- | OK | This parameter displays the state of the injector control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Cyl. 1-4 Injector Ckt Short Gnd Test Status | -- | OK | This parameter displays the state of the injector control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Cyl. 1-4 Injector Ckt Short Volts Test Status | -- | OK | This parameter displays the state of the injector control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Cylinder 1-4 IC Ckt Open Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Cyl. 1-4 IC Ckt Short Gnd Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Cyl. 1-4 IC Ckt Short Volts Test Status | -- | OK/Not Run | This parameter displays the state of the Ignition control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Decel Fuel Cut Off | -- | Inactive | This parameter displays the status of the operating mode of the control module used to turn off the fuel injectors during certain deceleration conditions.
Desired ECT | -- | Varies | This parameter displays the desired engine coolant temperature in degrees.
Desired Exh. CMP | -- | 3 to 7° | This parameter displays the desired exhaust camshaft angle as commanded by the control module.
Desired Idle Speed | -- | 600 to 950 RPM | This parameter displays the desired engine idle speed as commanded by the control module.
Desired Int. CMP | -- | 11 to 15° | This parameter displays the desired intake camshaft angle as commanded by the control module.
Distance Since DTC Cleared | -- | Varies | This parameter displays the mileage that has elapsed since the DTC cleared.
Distance Since Last Failure | -- | Varies | This parameter displays the distance accumulated when the emission diagnostic trouble code last failed.
EC Ign. Relay Ckt Open Test Status | -- | Not Run | This parameter displays the state of the EC Ignition Relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EC Ign. Relay Ckt Short Gnd Test Status | -- | Not Run | This parameter displays the state of the EC Ignition Relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EC Ign. Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the state of the EC Ignition Relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EC Ignition Relay Command | -- | ON | This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded ON by the control module.
EC Ignition Relay Feedback Signal | -- | Battery Voltage | This parameter displays the voltage available at the EC ignition relay pin of the control module.
ECT Sensor | -- | -39 to +140°C (-38 to +284°F) | This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor.
ECT/IAT Sen. Temp at Last ECT/RCT Fault Detected | -- | Agree | This parameter displays that the temperature values of the ECT and IAT sensors did not agree at the time of the most recent failure of the ECT/RCT performance diagnostic.
Eng Clnt Therm Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the control circuit for the engine coolant thermostat heater. The scan tool will display OK , Fault or Not Run. OK indicates that no circuit faults are detected during the current test.
Eng Clnt Therm Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the control circuit for the engine coolant thermostat heater. The scan tool will display OK , Fault or Not Run. OK indicates that no circuit faults are detected during the current test.
Eng Clnt Therm Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the control circuit for the engine coolant thermostat heater. The scan tool will display OK , Fault or Not Run. OK indicates that no circuit faults are detected during the current test.
Eng Clnt Therm Htr Command | -- | 0 to 100% | This parameter displays the commanded duty cycle for the engine coolant thermostat.
Engine Load | Engine Idling | 25 to 40% | This parameter displays the calculated engine load in percent based on inputs to the control module from various engine sensors.
Engine speed at 2,500 RPM | 25 to 40%
Engine Off Time | Ignition Switch in the OFF Position | Varies | This parameter displays the amount of time that has elapsed since the engine was last cycled OFF. The scan tool displays the time in hours, minutes, and seconds.
Engine Oil Level Switch | -- | OK | This parameter displays if the level of the engine oil is within range as determined by the control module from information received from the engine oil level switch.
Engine Oil Pressure Switch | -- | OK | This parameter displays the state of the EOP as determined by the control module. The control module monitors the EOP switch to determine if the EOP is sufficient. The scan tool displays Low when the EOP is below a predetermined value.
Engine Oil Temperature Calculated | -- | Varies | This parameter displays the temperature of the engine oil as calculated by the control module using various sensor inputs. The engine oil temperature calculated has a range of values indicating a low value when the oil temperature is low to a high value when the oil temperature is high.
Engine Run Time | Engine Operating | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running.
Engine Speed | Engine Cranking | Greater than 60 RPM | This parameter displays the speed of the engine crankshaft rotation from information received from the crankshaft position (CKP) sensor.
Engine Idling | Approximately 650 to 950 RPM
EVAP Purge Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the evaporative emission (EVAP) purge solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EVAP Purge Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the evaporative emission (EVAP) purge solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EVAP Purge Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the evaporative emission (EVAP) purge solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
EVAP Purge Solenoid Command | -- | 10 to 20% | This parameter displays the on-time or duty cycle of the EVAP canister purge solenoid commanded by the control module. Zero percent indicates no purge. One hundred percent indicates full purge.
Exh CMP Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the exhaust camshaft actuator solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Exh CMP Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the exhaust camshaft actuator solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Exh CMP Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the exhaust camshaft actuator solenoid control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Exh. CMP Active Counter | -- | Varies in counts | This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position (CMP) sensor.
Exh. CMP Angle | -- | 2 to 8° | This parameter displays the retard position of the camshaft in degrees of camshaft rotation from the parked position. Zero indicates the camshaft is in the parked position.
Exh. CMP Command | -- | 45 to 75% | This parameter displays the commanded duty cycle for the exhaust camshaft as commanded by the control module.
Exh. CMP Variance | -- | 0° | This parameter indicates the difference between the actual camshaft angle and the desired camshaft angle.
Fail Counter | -- | Counts | This parameter displays the number of times a DTC failed.
FC Relay 1 Ckt Open Test Status | -- | OK/Not Run | This parameter displays the status of the fan relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
FC Relay 1 Ckt Short Gnd Test Status | -- | OK/Not Run | This parameter displays the status of the fan relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
FC Relay 1 Ckt Short Volts Test Status | -- | OK/Not Run | This parameter displays the status of the fan relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
FC Relay 1 Command | -- | Varies | This parameter displays the commanded state of the cooling fan relay 1 control circuit. The cooling fan relay 1 should be ON when the scan tool indicates the FC relay 1 command is ON. The cooling fan relay 1 should be OFF when the scan tool indicates the FC Relay 1 Command is OFF.
FC Relay 2 Ckt Open Test Status | -- | OK/Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open.
FC Relay 2 Ckt Short Gnd Test Status | -- | OK/Not Run | This parameter displays the status of the fan relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
FC Relay 2 Ckt Short Volts Test Status | -- | OK/Not Run | This parameter displays the status of the fan relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
FC Relay 2 Command | -- | Varies | This parameter displays the commanded state of the cooling fan relay 2 control circuit. The cooling fan relay 2 should be ON when the scan tool indicates the FC Relay 2 command is ON. The cooling fan relay 2 should be OFF when the scan tool indicates the FC Relay 2 command is OFF.
Fuel Level Sensor | -- | Varies | This parameter displays the voltage from the sensor used to monitor the fuel level inside the fuel tank.
Fuel Pump Relay Ckt Open Test Status | -- | Not Run | This parameter displays the status of the fuel pump relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the fuel pump relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Fuel Pump Relay Ckt Short Volts Test Status | -- | Not Run | This parameter displays the status of the fuel pump relay control circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Fuel Pump Relay Command | Ignition ON, engine OFF | Fuel pump on for 2 s | This parameter displays the control modules commanded state of the fuel pump relay control circuit.
Engine idling | On
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as measured in liters/gallons. The control module determines the amount of fuel remaining in the tank by using information from the fuel level sensor. The scan tool will display a higher value with a full fuel tank, and a lower value with an empty fuel tank.
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as measured in percentage. The control module determines the amount of fuel remaining in the tank by using information from the fuel level sensors. The scan tool will display a higher value with a full fuel tank, and a lower value with an empty fuel tank.
Fuel Tank Rated Capacity | -- | 44.9 L (11.9 Gal) | This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle.
Fuel Trim Cell | -- | 6 | This parameter displays what fuel trim cell that is currently active.
Fuel Trim Learn | -- | Enabled | This parameter displays Enabled when conditions are appropriate for enabling long term fuel trim corrections. This indicates that the long term fuel trim is adapting continuing amounts of short term fuel trim. If the scan tool displays Disabled, then long term fuel trim will not respond to changes in short term fuel trim.
Fuel Trim System Test State | -- | Monitoring | This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test.
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.
GEN F-Terminal Signal | -- | 40 to 70% | This parameter indicates the generator field duty cycle as commanded by the voltage regulator or control module. The scan tool will display a higher value for a higher commanded generator output, and a lower value for a lower commanded generator output.
GEN L-Terminal Ckt Open Test Status | -- | Not Run | This parameter displays the status of the Gen-L Terminal circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the Gen-L Terminal circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
GEN L-Terminal Ckt Short Volts Test Status | -- | Not Run | This parameter displays the status of the Gen-L Terminal circuit. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
GEN L-Terminal Command | -- | 0 to 100% | This parameter displays the control modules commanded state of the voltage regulator on the generator.
GEN L-Terminal Signal Command | -- | ON | This parameter displays the commanded state of the generator L-terminal output.
HO2S 1 or HO2S 2 | Ignition ON, Engine OFF | 1275 mV | This parameter indicates the heated oxygen sensor (HO2S) sensor 1 or 2, output voltage as measured by the control module. The scan tool will display a higher value during a rich condition, and a lower value during a lean condition.
Engine Operating | Varies
HO2S 1 or HO2S 2 Heater | -- | 0.42 to 0.62 Amps | This parameter displays the amperage of the HO2S heater commanded by the control module.
HO2S 1 or HO2S 2 Heater Command | -- | ON | This parameter displays the commanded state of the HO2S 1 or HO2S 2 heater circuit by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF.
HO2S 1 or HO2S 2 Heater Command | -- | 0 to 99% | This parameter displays the commanded state of the Bank 1 Sensor 2 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON.
HO2S 1 or HO2S 2 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the control circuit for the HO2S 1 or HO2S 2. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
HO2S 1 or HO2S 2 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the control circuit for the HO2S 1 or HO2S 2. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
HO2S 1 or HO2S 2 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the control circuit for the HO2S 1 or HO2S 2. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
HO2S Heater Monitor Complete This Ignition | -- | Yes/No | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.
HO2S Heater Monitor Enabled This Ignition | -- | Yes/No | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.
HO2S/O2S Monitor Complete This Ignition | -- | Yes/No | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.
HO2S/O2S Monitor Enabled This Ignition | -- | Yes/No | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.
Hot Open Loop | -- | Inactive | This parameter displays the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature condition. The scan tool will display Inactive if the fuel system is operating normally.
IAT Sensor | -- | -39 to +140°C ( -38 to +284°F) | This parameter displays the temperature of the air entering the air induction system based on input to the control module from the intake air temperature (IAT) sensor.
Ignition 1 Signal | -- | B+ | This parameter displays B+ when the control module detects a voltage at the ignition 1 input terminal.
Ignition Accessory Signal | -- | ON | This parameter displays the state of the ignition 0 input to the control module from the ignition switch.
IMT Valve Command | -- | Off | This parameter displays the state of the IMT Valve solenoid control circuit as commanded by the control module.
IMT Valve Sol CKT Open Test Status | -- | OK | This parameter displays the status of the control circuit for the IMT Valve solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
IMT Valve Sol CKT GND Test Status | -- | OK | This parameter displays the status of the control circuit for the IMT Valve solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
IMT Valve Sol CKT Volts Test Status | -- | OK | This parameter displays the status of the control circuit forthe IMT Valve solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Inj. 1-4 Disabled Due to Misfire | -- | No | This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.
Injector PWM | -- | 2 to 3 ms | This parameter displays the average pulse width of the fuel injectors as determined by the control module.
Int CMP Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the control circuit for the Int CMP solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Int CMP Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the control circuit for the Int CMP solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Int CMP Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the control circuit for the Int CMP solenoid. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Int. CMP Active Counter | -- | Varies in counts | This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor.
Int. CMP Angle | -- | 8 to 18° | This parameter displays the advance position of the camshaft in degrees of camshaft rotation from the parked position. Zero indicates the camshaft is in the parked position.
Int. CMP Command | -- | 45 to 75% | This parameter displays the commanded duty cycle for the intake camshaft as commanded by the control module.
Int. CMP Variance | -- | 0 Degrees | This parameter indicates the difference between the actual camshaft angle and the desired camshaft angle.
Intake Manifold Pressure | -- | 32 to 53 kPa (4.6 to 7.6 PSI) | This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module.
Knock Detected Cyl. 1-4 | -- | NO | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event.
Knock Retard | -- | 0° | This parameter displays the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensors.
Long Term FT | -- | -5 to +5% | This parameter displays the commanded Long Term Fuel Trim correction by the control module.
Loop Status | -- | Closed Loop | This parameter displays the state of the fuel control system as commanded by the control module. Closed Loop operation indicates that the control module is controlling the fuel delivery based off the oxygen sensors input signal. In Open Loop operation the control module ignores the oxygen sensor input signal and bases the amount of fuel to be delivered on other sensor inputs.
LT FT Test Avg. | -- | 0.98% | This parameter displays the long term closed loop fuel correction. This value is compared to predetermined thresholds to determine if the fuel trim diagnostic is passing or failing.
LT FT Test Avg. w/o Purge | -- | 0.98 % | This parameter displays the non purge long term closed loop fuel correction This value is compared to predetermined thresholds to determine if the fuel trim diagnostic is passing, failing, or indeterminate during normal purge-off operation as well as during the intrusive excess purge vapor test.
MAF Performance Test | -- | OK | This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no condition is detected. The scan tool will display Fault if the control module detects a condition during the test.
MAF Sensor | Engine Idling | 1.7 to 3.7 g/s | This parameter indicates the quantity calculated by the control module based on a signal from the MAF sensor. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds.
Engine speed at 2,500 RPM | 5.5 to 7.5 g/s
MAP Performance Test 1 | -- | OK | This parameter displays the status of the MAP performance test 1 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAP Performance Test 2 | -- | OK | This parameter displays the status of the MAP performance test 2 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAP Sensor | -- | 26 to 52 kPa | This parameter displays the pressure from the MAP sensor to the control module.
MAP Sensor | -- | 0.98 to 1.42 V | This parameter displays the signal voltage from the MAP sensor to the control module.
MIL Ckt Open Test Status | -- | OK | This parameter displays the status of the control circuit for the malfunction indicator lamp control (MIL). The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the control circuit for the malfunction indicator lamp control (MIL). The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
MIL Ckt Short Volts Test Status | -- | Not Run | This parameter displays the status of the control circuit for the malfunction indicator lamp control (MIL). The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
MIL Command | -- | Off | This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module.
MIL Requested by DTC | -- | No | This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs.
Misfire Current Cyl. 1-4 | -- | 0 Counts | This parameter displays the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.
Misfire History Cyl. 1-4 | -- | 0 Counts | The misfire history counters display the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire DTC P0300 00 has become active. The misfire history counters will update every 200 cylinder firing events.
Not Run Counter | -- | Counts | This parameter displays the number of times a DTC does not run.
Pass Counter | -- | Counts | This parameter displays the number of times a DTC passed.
Power Enrichment | -- | Inactive | This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions.
Radiator Clnt. Temp. Sensor | -- | -39 to +140°C (-38 to +284°F) | This parameter displays the status of the radiator coolant temperature Sensor.
RCT/IAT Sen. Temp at Last ECT/RCT Fault Detected | -- | Agree | This parameter displays that the temperature values of the ECT and IAT sensors did not agree at the time of the most recent failure of the ECT/RCT performance diagnostic.
Reduced Engine Power | -- | Inactive | This parameter displays the status of the operating mode of the control module used to reduce engine power to prevent catalytic converter or engine damage or due to a Throttle Actuator Control (TAC) system failure.
Reduced Engine Power History | -- | OK | This parameter displays the last reason that ECM has Commanded Reduced Engine Power. The scan tool displays one of the following when Reduced Engine Power is commanded: · TAC DTC · FC DTC · ECT Overtemp · Eng Oil Overtemp
Reverse Switch | -- | OFF | Manual Transmission Reverse Switch On indicates that the reverse switch hard wire input to the ECM is active.
Short Term FT | -- | -5% to +5% | This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor. If the oxygen sensor indicates a lean air/fuel mixture, the control module will add fuel increasing the short term fuel trim above 0. If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce fuel decreasing the short term fuel trim below 0.
Spark | -- | -2 to +2° | This parameter displays the amount of spark advance the control module is commanding. The control module determines the desired advance.
ST FT Test Avg. | -- | 0.99% | This parameter displays the short term closed loop fuel correction. This value is compared to predetermined thresholds to determine if the fuel trim diagnostic is passing or failing.
Start Up ECT | -- | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the engine coolant on start up based on input to the control module from the ECT sensor.
Start Up IAT | -- | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the intake air at start in the air induction system based on input to the control module from the IAT sensor.
Starter Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the control circuit for the starter relay. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Starter Relay Ckt Short Gnd Test Status | -- | Not Run | This parameter displays the status of the control circuit for the starter relay. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Starter Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the control circuit for the starter relay. The scan tool displays OK , Fault, or Not Run. OK indicates that no circuit faults are detected during the current test.
Starter Relay Command | -- | OFF | The scan tool displays ON/OFF. The scan tool displays OFF until the ignition is placed into the CRANK position.
TAC Forced Engine Shutdown | -- | NO | This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled.
TAC Motor Command | -- | Varies | This parameter displays the percentage of the commanded state of the TAC motor by the control module.
TB Idle Airflow Compensation | -- | Varies | This parameter displays the amount of airflow compensation in response to engine intake air flow restrictions. For example, throttle plate coking.
TCC/Cruise Brake Pedal Switch | -- | Released | This parameter displays that the state of the redundant discrete brake switch input to the controller indicates that the brake is applied.
TCS Torque Delivered Signal | -- | 0 to 3% | This parameter displays the estimated engine torque delivered by the powertrain, as a percentage of maximum engine torque, that is provided to the ABS/TCS module via the delivered torque PWM output from the ECM.
TCS Torque Request Signal | -- | 0 ft-lbs | This parameter displays the estimated engine torque delivered by the powertrain, as a percentage of maximum engine torque, that is provided to the ABS/TCS module via the delivered torque PWM output from the ECM.
Torque Delivered Signal | -- | 1- to 5 ft-lbs | This parameter displays the torque delivered from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.
Torque Management Spark Retard | -- | 15 to 25° | This parameter displays how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving.
Total Knock Retard | -- | 0° | This parameter displays how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.
Total Misfire | -- | 0 Counts | This parameter displays the total number of cylinder firing events that the control module detected as misfires for the last 200 crankshaft revolution sample period.
TP Desired Angle | -- | 2 to 6% | This parameter displays the desired TP angle commanded by the control module.
TP Indicated Angle | -- | 2 to 6% | This parameter displays the actual TP angle indicated by the control module using information from the two TP sensors.
TP Performance Test | -- | OK | This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
TP Sensor 1 | Accelerator pedal not actuated | 4.14 to 4.34 V | This parameter displays the voltage signal sent to the control module from TP sensor 1 of the throttle assembly. The TP sensor 1 is a range of values indicating a high voltage when the throttle is closed to a low voltage when the throttle plate is fully open.
Accelerator pedal fully actuated | 3.50 to 3.37 V
TP Sensor 1 Indicated Position | -- | 2 to 6% | This parameter displays the angle of the throttle position (TP) sensor 1 as calculated by the control module using the signal from the TP sensor 1. The TP sensor 1 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open.
TP Sensor 1 Learned Minimum | -- | 0.51 to 0.71 V | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle.
TP Sensor 2 | Accelerator pedal not actuated | 0.68 to 0.88 V | This parameter displays the voltage signal sent to the control module from TP sensor 2 of the throttle assembly. The TP sensor 2 is a range of values indicating a low voltage when the throttle is closed to a high voltage when the throttle plate is fully open.
Accelerator pedal fully actuated | 1.35 to 1.55 V
TP Sensor 2 Indicated Position | -- | 2 to 6% | This parameter displays the angle of the TP sensor 2 as calculated by the control module using the signal from the TP sensor 2. The TP sensor 2 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open.
TP Sensor 2 Learned Minimum | -- | 0.55 to 0.75 V | This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle.
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2. The scan tool will display Agree or Disagree. Agree indicates that TP sensor 1 and TP sensor 2 voltages correspond to the same throttle position. Disagree indicates that TP sensor 1 and TP sensor 2 voltages correspond to different throttle positions.
Traction Control Status | -- | Inactive | This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control.
TWC Mon. Test Count | -- | 0 Counts | This parameter displays the number of iterations of the catalyst monitor diagnostic test that have been performed since a code clear for bank 1 (used to determine if a sufficient number of tests have run to report a passing condition).
TWC Mon. Off Idle Test Conditions Met | -- | Yes/No | This parameter displays the status of the catalyst monitor diagnostic. Off Idle Conditions Met indicates if the off idle conditions for the catalyst monitor diagnostic have been met. Once the Off Idle Conditions are met the vehicle can return to idle and allow the catalyst monitor diagnostic test to run.
TWC Monitor Test Result | -- | Varies | This parameter displays the status of the catalyst monitor diagnostic.
TWC Monitor Test State | -- | Varies | This parameter displays when the catalyst monitor diagnostic is actively running a test. This condition will only be true when the vehicle is at idle.
Vehicle Speed Sensor | -- | 0 Km/h (0 MPH) | This parameter displays the speed of the vehicle as calculated by the transmission control module (TCM) from information received from the vehicle speed sensor (VSS).
Warm-ups Since DTC Cleared | -- | Varies | This parameter displays the number of warm-ups since the DTC was cleared.
Warm-ups w/o Emission Faults | -- | Varies | This parameter displays the number of warm up cycles that have occurred without an emission fault present. The scan tool will display a 0 if a fault has occurred. The scan tool will display a higher count if a number of warm up cycles have occurred without an emission fault.
Warm-ups w/o Non-Emission Faults | -- | Varies | This parameter displays the number of warm up cycles that have occurred without a non-emission fault present. The scan tool will display a 0 if a fault has occurred. The scan tool will display a higher count if a number of warm up cycles have occurred without a non-emission fault.
Wide Open Throttle | -- | NO | This parameter displays the throttle status commanded by the control module. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100%.

#### Engine Control Module (ECM) Scan Tool Output Controls

Output Control | Description
--- | ---
A/C Relay | This function activates the A/C compressor relay. The normal commanded state of the A/C relay is None. The A/C compressor will turn ON/OFF when commanded ON/OFF. The system remains in the commanded state until cancelled by the scan tool. The scan tool initiates the test when the following conditions are met: · In the correct power mode · A/C high side pressure is in range · Engine speed is in range · Ignition voltage is in range · There are no A/C pressure sensor DTCs set.
Clutch Pedal Position Learn | This device control is used to trigger the procedure to learn the clutch pedal fully applied position.
Crankshaft Pos. Variation Learn | This device control is used to activate the crankshaft position variation learn algorithm which calculates the reference pulse correction factors for the misfire diagnostic.
Cylinder Power Balance | This function disables the selected fuel injector. The normal commanded state is None. The scan tool initiates the test when the following conditions are met: · The engine is operating and the engine idle is stable. · The vehicle speed is 0 km/h (0 MPH). · There are no vehicle speed sensor DTCs set. If the fuel injector is disabled after 30 seconds, fuel injector control is not allowed again on the same fuel injector for 60 seconds.
Engine Controls Ignition Relay | This function controls the engine control (EC) ignition relay or main relay. The normal commanded state is None. When commanded ON or OFF, the engine control module (ECM) turns the relay ON or OFF. The system remains in the commanded state until cancelled by the scan tool. The scan tool initiates the test when the following conditions are met: · The ignition is ON with the engine OFF. · There are no CKP or VSS sensor DTCs set. · The vehicle speed is 0 km/h (0 mph). · In the correct power mode
Engine Coolant Thermostat Heater | This function controls the engine coolant thermostat heater. The normal commanded state is None. The system will increase or decrease the amount of thermostat opening by changing the duty cycle in 10% increments within a range of 0 to 100%.
Engine Speed Control | This function controls the idle speed override in 25 RPM, 100 RPM, and 500 RPM increments, from the base idle speed to 1950 RPM. The scan tool initiates the test when the following conditions are met: · The vehicle speed is 0 km/h (0 MPH) · There are no VSS sensor DTCs set · Transmission in Park or Neutral · No transmission range switch DTCs set
EVAP Purge Solenoid | This function controls the EVAP purge solenoid valve. The normal commanded state is None. The system will increase or decrease the amount of purge by changing the duty cycle of the purge valve in 10% increments within a range of 0 to 100%. The scan tool initiates the test when the following conditions are met: · The vacuum level in the EVAP purge system is within range · There are no EVAP DTCs set · The EVAP system test is not in progress In the correct Power Mode
Exhaust CMP Actuator | This function controls the selected camshaft actuator solenoid. The normal commanded state is None. The system will increase or decrease the angle of the selected camshaft in 5 degree increments. The scan tool initiates the test when the following conditions are met: · The engine is operating. · The commanded camshaft position is not out of range. · There are no CKP or CMP sensor DTCs set. · Engine oil temperature is not out of range. · In the correct power mode If the actuator is disabled after 30 s, the actuator control is not allowed again on the same actuator for 60 s.
Fan Relay 1 | This function controls the cooling fan relay 1. The normal commanded state of the fan relay is None. The scan tool initiates the test when the following conditions are met: · Engine coolant temperature is not out of range. · In the correct power mode
Fan Relay 1 & 2 | This function controls the cooling fan relay 1 & 2. The normal commanded state of the fan relay is None. The scan tool initiates the test when the following conditions are met: · Engine coolant temperature is not out of range. · In the correct power mode
Fuel Injector Balance | This function enables the fuel injector in order to verify proper fuel injector flow. The ECM will pulse the selected injector when the following conditions are met: · All instruction on the scan tool completed · Fuel injector selected · Key ON, engine OFF The selected fuel injector can only be flowed/pulsed once per ignition cycle.
Fuel Pump Relay | This function controls the fuel pump relay. The normal commanded state is None. When commanded ON/OFF, the ECM turns the fuel pump ON/OFF. The scan tool initiates the test when the following conditions are met: · The engine speed is 0 RPM. · In the correct power mode · The output control timer has not expired · The ignition voltage is within range
Fuel Trim Enable | This function enables or disables the ECM fuel trim learning. The normal commanded state is None.
Fuel Trim Reset | This function is used to reset the learned fuel trim values to their initial values.
GEN L-Terminal | This function is used to override the state of the generator L terminal output. The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. · The engine is operating to turn OFF the component · The vehicle speed is 0 km/h (0 MPH) · Transmission in Park or Neutral · In the correct power mode · The output control timer has not expired
HO2S Heater Learn | This function is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine OFF time.
HO2S Heater Sensor 1 & 2 | This function controls the selected HO2S heater. The normal commanded state is None. Commanding the HO2S heater ON turns on the heater driver. The scan tool initiates the test when the following conditions are met: · The engine is operating · The exhaust temperature is within range · In the correct power mode · The HO2S heaters are not over temperature · The ignition voltage is not out of range while commanding the heaters ON
Idle Learn Reset | This function is used to reset the learned airflow adaptive values to the initial values. The scan tool initiates the test when the following conditions are met: · The vehicle speed is 0 km/h (0 MPH). · In the correct power mode · The transmission is in Park or Neutral. · There are no throttle actuator control system DTCs set
IMT Valve | This device control is used to override the state of the intake manifold tuning valve output. A output test is used to select whether commanding the intake manifold tuning valve output on or off results in the valve being commanded closed or open.
Intake CMP Actuator | This function controls the selected camshaft actuator solenoid. The normal commanded state is None. The system will increase or decrease the angle of the selected camshaft in 5 degree increments. The scan tool initiates the test when the following conditions are met: · The engine is operating. · The commanded camshaft position is not out of range. · There are no CKP or CMP sensor DTCs set. · Engine oil temperature is not out of range. · In the correct power mode If the actuator is disabled after 30 seconds, the actuator control is not allowed again on the same actuator for 60 seconds.
Loop Status | This device control is used to enable or disable closed loop fuel control.
Malfunction Indicator Lamp | This function controls the malfunction indicator lamp (MIL). The normal commanded state is None. When commanded ON/OFF, the ECM turns the malfunction indicator lamp (MIL) ON/OFF. This output can also be monitored on the scan tool data parameter MIL Command. The system remains in the commanded state until cancelled by the scan tool.
Misfire Graphic | This function is used to graph the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph.
Oil Life Reset | This function is used to reset the engine oil life. The engine oil remaining life is determined from engine revolutions and the distance driven since the last oil change.
Spark Retard | This function is used to control the amount of spark retard. The normal commanded state is None. The system will increase or decrease the amount of spark retard by 1 degree increments within a range of 0-10 degrees maximum retard. The system remains in the commanded state until cancelled by the tool.
Starter Relay | This function is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON. The scan tool initiates the test when the following conditions are met: · The engine speed is 0 RPM. · There are no CKP sensor DTCs set · The vehicle speed is 0 km/h (0 MPH) · There are no VSS sensor DTCs set · There are no theft deterrent DTCs set · Transmission is in Park or Neutral · No transmission range switch DTCs set · There are no TAC system DTCs set · The ignition voltage is within range · In the correct power mode · Not enough time has elapsed since the last time the starter has been enabled with a scan tool.
Throttle Position | This function controls the throttle valve in 10% increments. The scan tool initiates the test when the following conditions are met: · The engine speed is 0 RPM. · The vehicle speed is 0 km/h (0 MPH). The system remains in the commanded state until cancelled by the scan tool.