For 1990-2009 cars

## Scan Tool Data List Except Holden

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A 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 conditions are determined:

• | The Diagnostic System Check - Engine Controls is completed.

• | There are no diagnostic trouble codes (DTCs).

• | The on-board diagnostics are functioning correctly.

Scan tool values from an engine that is operating correctly may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents the values that would be seen on a normal operating engine.

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

Only the parameters listed below are referenced in this service information for use in diagnosis. If all values are within the typical range described below, refer to Testing for Intermittent Conditions and Poor Connections for diagnosis.

The column labeled Data List indicates where a parameter is located on the scan tool. Review the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

All: The Parameter is in all data lists indicated below.
Eng: Engine Data
EGR: EGR Data
EVAP: EVAP Data
FT: Fuel Trim Data
HO2S: O2S/HO2S Data
MF: Misfire Data
CH: Cooling/HVAC Data
IPC: IPC Data
FF: Freeze Frame Data
FR: Failure Records Data

#### Scan Tool Data List

Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values
--- | --- | --- | ---
Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories Off
5 Volt Reference 1 | EGR, EVAP, CH | 0-5 Volts | 5.0 Volts
A/C High Side Pressure Sensor | CH | 0-5 Volts | Varies
A/C High Side Pressure Sensor | CH | kPa/psi | Varies
A/C Relay Command | Eng, EGR, MF, CH | On/Off | Off
A/C Request Signal | CH | Yes/No | No
Air Flow Calculated | Eng , FT, HO2S, MF, FF, FR | g/s | 3-6 g/s
Air Fuel Ratio | Eng, FT, HO2S, FF, FR | Ratio | 14.7:1
BARO | Eng , EGR, EVAP, HO2S, FT, FF, FR, MF | 65-104 kPa | Varies with altitude
Catalytic Converter Protection Active | HO2S, FT, MF | Yes/No | No
CMP Active Counter | Eng, MF | 1-3 Counts | Varies
Coolant Hot Lamp (If Equipped) | IPC | On/Off | Off
Decel. Fuel Cutoff | EGR, FT, HO2S | Active/Inactive | Inactive
Desired EGR Position | EGR | % | Varies
Desired IAC Position | Eng | Counts | Varies
Desired Idle Speed | Eng, EVAP, FF, FR | 0-7,000 RPM | 800-950 RPM
ECT Sensor | Eng , EGR, EVAP, FT, HO2S, MF, CH, IPC, FF, FR | -39°C to +140°C (-38°F to +284°F) | Varies
EGR Flow Test Count | EGR | Counts | Varies
EGR Learned Minimum | EGR | Volts | Varies
EGR Position Sensor | Eng, EGR, FT, MF | % | Varies
EGR Position Sensor | EGR | Volts | Varies
EGR Position Variance | EGR | Counts | Varies
EGR Solenoid Command | EGR | % | Varies
Engine Load | Eng , EGR, EVAP, FT, HO2S, MF, CH, FF, FR | 0-99% | 25-40% - Idle 25-40% - 2500 RPM
Engine Run Time | ALL | 0:00:00 | Varies
Engine Speed | ALL | RPM | 750-950 RPM
EVAP Purge Solenoid Command (If Equipped) | Eng, EVAP, FT, HO2S | 0-100% | Varies
EVAP Vent Solenoid Command (If Equipped) | Eng, EVAP | Venting/Not Venting | Venting
Fail Counter | FF, FR | Counts | Varies
Fans High Speed | CH | ON/OFF | Varies
Fans Low Speed | CH | ON/OFF | Varies
Fuel Level to Cluster | EVAP, IPC | % | Varies
Fuel Level Sensor | Eng, EVAP, FT, IPC | 0-5 Volts | Varies
Fuel Level Sensor | Eng, EVAP, FT, IPC | % | Varies
Fuel Pump Relay Command | Eng, FT | On/Off | On
Fuel Tank Pressure Sensor (If Equipped) | Eng, EVAP | in H2O/mm Hg | Varies
Fuel Tank Pressure Sensor (If Equipped) | Eng, EVAP, FF, FR | 0-5 Volts | Varies
Fuel Trim Cell | Eng, FT, FF, FR | Cell Number | 20
Fuel Trim Learn | Eng, FT, FF, FR | Enabled/Disabled | Enabled
O2S/HO2S 1 | Eng, EVAP, FT, HO2S, FF, FR | 0-1,006 mV | Varies 400-800 mV
O2S/HO2S 1 Ready | HO2S | Yes/No | Yes
O2S/HO2S 2 | Eng, EVAP, FT, HO2S, FF, FR | 0-1,006 mV | Varies 400-800 mV
IAC Position | Eng, EGR, FT, HO2S, CH, FF, FR | Counts | 15-40 Counts
IAT Sensor | Eng, EGR, EVAP, FT, HO2S, MF, CH, FF, FR | -39° to +140°C (-38° to +284°F) | Varies
Ignition 1 Signal | Eng, EGR, EVAP, FT, HO2S, MF, CH, IPC | Volts | 12.0-14.5 Volts
IMT Valve Command (If Equipped) | Eng | On/Off | Off
Injector PWM | Eng, FT, HO2S, MF, FF, FR | 0-9 ms | 4.6-5.4 ms
Knock Retard | Eng, EGR, CH | Degrees | Varies
KS Active Counter | Eng | Counts | Varies
Long Term FT | Eng, EVAP, FT, HO2S, FT, FF, FR | -100% to +100% | 0%
Long Term FT Avg. | FT | -100% to +100% | 0%
Loop Status | Eng, EVAP, FT, HO2S, FF, FR | Open Loop/Closed Loop | Closed Loop
Low Fuel Lamp Command (If Equipped) | IPC | On/Off | Off
MAP Sensor | Eng, EGR, EVAP, FT, HO2S, MF, FF, FR | kPa | 38-50 kPa Varies with Altitude
MAP Sensor | Eng, MF, FF, FR | 0-5 Volts | 0.9-1.7 Volts
MIL Command | Eng, IPC | On/Off | Off
Mileage Since First Failure | FF, FR | km - miles | Varies
Mileage Since Last Failure | FF, FR | km - miles | Varies
Misfire Current Cyl. 1-4 | MF | 0-255 Counts | 0
Misfire History Cyl. 1-4 | MF | 0-65,535 Counts | 0
Not Run Counter | FF, FR | Counts | Varies
Pass Counter | FF, FR | Counts | Varies
PNP Switch | Eng, EGR, IPC | Park/Neutral/In Gear | Park/Neutral
Power Enrichment | FT, HO2S, MF, FF, FR | Active/Inactive | Inactive
Power Steering Switch (If Equipped) | Eng, CH | High Pressure/Normal Pressure | Normal Pressure
Rich/Lean to Lean/Rich Ratio Sensor 1 | FT, HO2S | Counts | Varies
Rich/Lean Transition Sensor 1 | FT, HO2S | Counts | Varies
Rough Road Sensor (If Equipped) | MF | 0-5 Volts | 2-3 Volts
Short Term FT Avg. | FT | -25% to +25% | -3% to +3%
Short Term FT | Eng, EVAP, FT, HO2S, FF, FR | -25% to +25% | -3% to +3%
Spark | Eng, FT, HO2S, MF, CH | -20 to +40 Degrees | 2-10 Degrees
Start Up ECT | EVAP, HO2S, CH, FF, FR | -39° to +140°C (-38° to +284°F) | Varies
Start Up IAT | EVAP, HO2S, CH, FF, FR | -39° to +140°C (-38° to +284°F) | Varies
SVS Lamp Command (If Equipped) | IPC | On/Off | Off
TCC Enable Solenoid Command (If Equipped) | Eng, MF | On/Off | Off
Total Fuel Trim Average | EVAP, FT, HO2S | -100 to +100% | Varies
Total Misfire | MF | Counts | 0
TP Sensor | Eng, EGR, EVAP, FT, HO2S, MF, FF, FR | 0-5 Volts | 0.0-0.3 Volts
TP Sensor | Eng, EGR, EVAP, FT, HO2S, MF, FF, FR | % | 5-15 %
TWC Temperature Calculated | MF | Temperature | Varies
Vehicle Security Status (If Equipped) | Eng, IPC | Enabled/Disabled | Disabled
Vehicle Speed Sensor | Eng, EGR, EVAP, FT, HO2S, MF, CH, IPC, FF, FR | Km/h mph | 0 km/h (0 mph)

## Scan Tool Data List Holden

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A 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 conditions are determined:

• | The Diagnostic System Check - Engine Controls is completed.

• | There are no diagnostic trouble codes (DTCs).

• | The on-board diagnostics are functioning correctly.

Scan tool values from an engine that is operating correctly may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents the values that would be seen on a normal operating engine under the conditions specified in the first row of the Scan Tool Data List table.

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

Only the parameters listed below are referenced in this service information for use in diagnosis. If all values are within the typical range described below, refer to Testing for Intermittent Conditions and Poor Connections for diagnosis.

#### Scan Tool Data List

Scan Tool Parameter | System State | Expected Value | Description
--- | --- | --- | ---
Engine Idling / Operating Temperature / Closed Throttle / Park or Neutral / Closed Loop / Accessories Off
5V Reference Voltage | - | Voltage | This parameter displays the diagnostic state of the output driver for the 5 volt reference circuit.
A/C Clutch (Air Conditioning) | On Off | - | This parameter displays the state of the air conditioning (A/C) clutch relay control circuit as commanded by the control module.
A/C Pressure (Air Conditioning) | - | Voltage | This parameter displays the voltage from the A/C high side pressure sensor signal circuit to the control module.
A/C Request (Air Conditioning) | No 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 Ratio | - | 14.6:1 | This parameter displays the ratio of air to fuel as calculated by the control module based on various sensor inputs.
B1 LTFT Average (Bank 1 Long Term Fuel Trim) | - | % | This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 for cruise and acceleration conditions.
B1 STFT Average (Bank 1 Short Term Fuel Trim) | - | % | This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor 1.
B1S1 O2 Sensor Ready (Bank 1 Sensor 1) | No Yes | - | This parameter displays that the HO2S 1 is at operating temperature.
B1S1 O2 Sensor Rich/Lean to Lean/Rich Response Ratio (Bank 1 Sensor 1) | - | 1:1 | This parameter displays the lambda output from the HO2S to the control module. A lambda below 1.0 indicates a rich exhaust, while a lambda above 1.0 indicates a lean exhaust.
B1S1 O2S Rich/Lean Switches (Bank 1 Sensor 1) | - | Counts | This parameter displays the oxygen sensor rich/lean and lean/rich switches.
Barometric Pressure | kPa | 102 | This parameter displays the barometric pressure. The control module uses the barometric pressure sensor input for fuel control to compensate for altitude differences.
Battery Voltage | - | Battery Voltage | The scan tool displays the voltage measured between the module’s battery positive voltage circuit and ground circuit.
Calculated Airflow | - | g/s | This parameter displays the calculated air flow into the engine that is based on manifold absolute pressure. The calculation is used in several diagnostics to determine when to run the diagnostics.
Calculated Catalyst Temperature | - | °C | This parameter displays the catalytic converter temperature as calculated by the control module
Camshaft Active Counter | - | Counts | This parameter displays the CMP active counts.
Catalyst Protection Mode | Inactive Active | - | This parameter displays if the control module is commanding catalytic converter protection.
Closed Loop | Yes No | - | This parameter displays the Closed Loop Active (Yes) or Inactive (No).
Coolant Temperature | - | °C | This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor.
Cooling Fan High Speed | On Off | - | This parameter displays the control module commanded state of the fan relay control circuit.
Cooling Fan Low Speed | On Off
Deceleration Fuel Cutoff | Inactive Active | - | 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 EGR Position | - | % | This parameter displays the desired EGR position as commanded by the control module.
Desired Engine Idle Speed | - | RPM | This parameter displays the desired engine idle speed as commanded by the control module.
Desired IAC Position (Idle Air Control) | - | Steps | This parameter displays the desired IAC position as commanded by the control module.
EGR Duty Cycle | - | % | This parameter displays the EGR pintle position in percent of range as commanded by the control module.
EGR Feedback | - | V | This parameter displays the actual EGR pintle position in volts.
EGR Flow Test Count (Exhaust Gas Recirculation) | - | Counts | This parameter displays the number of EGR flow test samples collected during the current ignition cycle.
EGR Learned Minimum Position (Exhaust Gas Recirculation) | - | V | This parameter displays the learned minimum value of the EGR valve as recorded by the control module during the last learn procedure.
EGR Position Sensor | - | % | This parameter displays the EGR pintle position in percent of range as commanded by the control module.
EGR Position Variance (Exhaust Gas Recirculation) | - | Counts | This parameter displays the difference between the actual command of the EGR valve to the desired position of the EGR valve.
Engine Load | - | % | This parameter displays the calculated engine load in percent based on inputs to the control module from various engine sensors.
Engine Runtime | - | h:m:s | This parameter displays the time elapsed since the engine was started.
Engine Speed | - | RPM | This parameter displays the speed of the engine crankshaft rotation from information received from the crankshaft position (CKP) sensor.
Fuel Level Input | - | V | This parameter displays the voltage signal received by the control module from the fuel level sensor.
Fuel Level Output | - | % | Sensor: This parameter displays the percentage signal received by the control module from the fuel level sensor.
Fuel Pump | On Off | - | This parameter displays the control modules commanded state of the fuel pump relay control circuit.
Fuel Trim Cell | - | Counts | This parameter displays what fuel trim cell that is currently active.
Fuel Trim Learn | Yes No | - | This parameter displays Yes when conditions are appropriate for enabling long term fuel trim corrections.
Heated O2 Sensor | - | mV | This parameter displays the voltage output from the HO2S to the control module.
Hot Mode Lamp | On Off | - | This parameter displays the Hot Mode Lamp Active (On) or Inactive (Off).
Idle Air Control | - | Steps | This parameter displays the ECM command for the idle air control (IAC) pintle position in steps.
Injector PWM Average | - | ms | This parameter displays the average pulse width of the fuel injectors as determined by the control module.
Intake Air Temperature | - | °C | 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.
Knock Retard | - | °CA | 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.
Knock Sensor Active Counter | - | Counts | This parameters displays the number of times the control module detects activity from the knock sensor.
Long Term Fuel Trim | - | % | This parameter displays the commanded Long Term Fuel Trim correction by the control module.
Low Fuel Lamp | On Off | - | This parameter displays the control modules commanded state of the low fuel lamp.
Manifold Absolute Pressure | - | kPa | This parameter displays the pressure from the manifold absolute pressure (MAP) sensor to the control module.
MIL Request | On Off | - | This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module.
Misfire Current Cyl. #1 | - | Counts | This parameter displays the number of misfires that have been detected during the last 200 cylinder firing events.
Misfire Current Cyl. #2
Misfire Current Cyl. #3
Misfire Current Cyl. #4
Misfire History Cyl. #1 | - | Counts | The misfire history counters display the total level of misfire that has been detected on each cylinder.
Misfire History Cyl. #2
Misfire History Cyl. #3
Misfire History Cyl. #4
O2 Sensor | - | mV | This parameter displays the voltage output from the HO2S to the control module.
Park/Neutral Switch | P N R 1,2,3,4 | P/N | This parameter displays whether the transmission range selector is in park/neutral or in gear.
Power Enrichment | Inactive Active | - | This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions.
Power Steering Switch | On Off | - | This parameter displays the state of the power steering pressure switch.
Purge Solenoid | - | % | This parameter displays the percentage of Purge at the Purge Solenoid.
Rough Road Sensor | - | V | This parameter displays the voltage from the rough road sensor.
Short Term Fuel Trim | - | % | This parameter displays percentage. This parameter indicates the average of the short term fuel trim cells The short fuel trim cells are rated, or weighted for the amount of which they are used.
Spark Advance | - | °CA | This parameter displays the amount of spark advance the control module is commanding on the ignition control circuits.
Start Up ECT (Engine Coolant Temperature) | - | °C | 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 (Intake Air Temperature) | - | °C | 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.
SVS Lamp (Service Vehicle Soon) | On Off | - | This parameter displays the control modules commanded state of the service vehicle soon lamp.
TCC Engaged | No Yes | - | This parameter displays the control module commanded state of the TCC solenoid.
Throttle Position Sensor | - | V | This parameter displays the actual voltage on the TP sensor signal circuit as measured by the control module.
Throttle Position Sensor Signal | - | % | This parameter displays the percent of throttle opening as calculated by the control module using information from the TP sensor.
Total Misfire | - | 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.
Vehicle Speed | - | km/h | This parameter displays the speed of the vehicle. received from the vehicle speed sensor (VSS).
Vehicle Theft Deterrent | Disabled Enabled | - | This parameter displays the status of the vehicle theft deterrent system.
VGIS Enable | Disabled Enabled | - | This parameter displays the control modules commanded state of the VGIS (Variable Geometry Induction System) solenoid.