For 1990-2009 cars

Use the Typical Scan Data Values table only after the Powertrain On-Board Diagnostic System Check has been completed, no DTC(s) were noted and you have determined the on-board diagnostics are functioning properly. Scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Typical Scan Data values represent values that would be seen on a normally running engine.

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

Only the parameters listed below are referred to in this service manual for use in diagnosis. For further information on using the scan tool to diagnose the PCM and related sensors, refer to the applicable reference section listed below. If all values are within the typical range described below, refer to Symptoms section for diagnosis. The Typical Scan Data Values table contains all the parameters included in the following data lists arranged in alphabetical order:

#### Engine Data

• | ENG 1- Contains general information regarding fuel delivery and basic engine operating conditions.

• | ENG 2 - Contains general information regarding IC, A/C, and basic engine operating conditions.

#### Specific Engine Data

• | EGR - Contains information specific to the Exhaust Gas Recirculation system flow diagnostics and the EGR valve pintle position sensor diagnostics. Also displays parameters required to verify proper EGR system operation.

• | EVAP - Contains information specific to the EVAP system diagnostics. Also displays parameters required to verify proper EVAP system operation.

• | CATALYST - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation.

• | HO2S - Contains information specific to the Heated Oxygen Sensor diagnostics and parameters required to verify proper HO2S operation.

• | MISFIRE - Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire.

#### Typical Scan Tool Data Values

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference
--- | --- | --- | --- | ---
A/C High Side Pressure | Engine 2 | Volts | Varies with refrigerant temperature | DTC P0530 A/C Refrigerant Pressure Sensor Circuit
A/C Press. Out Of Range | Engine 2 | Yes / No | No (Yes with low or high A/C refrigerant pressure) | PCM Controlled Air Conditioning Diagnosis
A/C Request | Engine 2 | Yes / No | No (Yes with A/C ON) | PCM Controlled Air Conditioning Diagnosis
Actual EGR Position | Engine 1 EGR Misfire | Percent | 0% | DTC P1404 EGR Valve Stuck Open
Air/Fuel Ratio | Engine 1 HO2S | Ratio | 14.2:1 - 14.7:1 | DTC P0171 Fuel Trim System Lean
BARO | Engine 1 Engine 2 EGR EVAP | kPa / Volts | 65 - 110 kPa (Depends on altitude and barometric pressure). | DTC P0107 MAP Sensor Circuit Low Voltage
Boost Solenoid PWM | Engine 2 | Percent | 100% | Boost Control System Check
Cam Signal Present | Misfire | Yes/No | Yes | DTC P0341 CMP Sensor Circuit Performance
Change Oil Lamp | Engine 2 | On / Off | Off | Information Sensors / Switches
Commanded A/C | Engine 2 | On / Off | Off (On with A/C compressor engaged) | PCM Controlled Air Conditioning Diagnosis
Commanded Fan 1/Commanded Fan 2 | Engine 2 | On / Off | Off (On with fans running) | Electric Cooling Fan Diagnosis
Commanded Gen | Engine 1 | On / Off | On | DTC P0560 System Voltage
Cruise | Engine 1 | Engaged / Disengaged | No | DTC P1554 Cruise Control Status Circuit
Cruise Inhibited | Engine 1 | Yes / No | Yes | DTC P1554 Cruise Control Status Circuit
Current Gear | Engine 1 | 1 / 2 /3 / 4 | 1 | 4T65-E Automatic Transaxle Diagnosis
Decel Fuel Mode | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Desired EGR Position | Engine 1 EGR Misfire | Percent | 0% | DTC P1404 EGR Valve Stuck Open
Desired Idle Speed | Engine 1 Engine 2 | RPM | PCM commanded idle speed (varies with temperature). | Idle Air Control System Check
ECT | Engine 1 Engine 2 EGR EVAP Catalyst

HO2S

Misfire

°C, °F

85°C - 105°C / 185°F - 220°F (varies with temperature).

DTC P0117 ECT Sensor Circuit Low Voltage

EGR Closed Val.Pintle Pos | EGR | Volts | 0.14-1.0 volt | DTC P1404 EGR Valve Stuck Open
EGR Duty Cycle | EGR | Percent | 0% | EGR System Description
EGR Feedback | EGR | Volts | 0.14 - 1.0 volt | EGR System Description
EGR Flow Test Count | EGR | Counts | 0 - 10 | EGR System Description
EGR Position Error | EGR | Percent | 0% - 9% | EGR System Description
Engine Load | Engine 1 Engine 2 Catalyst Misfire | Percent | 2% - 5% at idle 7% - 10% at 2500 RPM | --
Engine Oil Level | Engine 2 | Ok / Low | Ok | Engine Oil Level Switch Diagnosis
Engine Oil Life | Engine 2 | Percent | 0%-100%(varies)
Engine Run Time | Engine 1 Engine 2 EVAP Catalyst | Hr: Min: Sec | Depends on time since startup. | --
Engine Speed | Engine 1 Engine 2 EVAP | RPM | ±100 RPM from Desired Idle | --
EVAP Canister Purge | EVAP HO2S | Percent | 0% - 25% (varies) | EVAP Control System
EVAP Fault History | EVAP | Fault / No Fault | No Fault | --
EVAP Vent Solenoid | EVAP | Open / Closed | Open | EVAP Control System
Fuel Level | EVAP | Percent | varies with the amount of fuel | --
Fuel Pump | Engine 2 | On / Off | On | Fuel Supply Components
Fuel Pump Speed | Engine 2 | Normal / High | Normal | Fuel Supply Components
Fuel Tank Pressure | EVAP | in H20 / Volts | 0 in H20 / 1.5 volts | DTC P0452 Fuel Tank Pressure Sensor Low Voltage DTC P0453 Fuel Tank Pressure Sensor High Voltage
Fuel Trim Cell | Engine 1 | Cell # | 0 | DTC P0171 Fuel Trim System Lean
Fuel Trim Learn | Engine 1 | Disabled / Enabled | Enabled | --
Generator PWM | Engine 2 | Percent | Varies | Charging System
HO2S Sen. 1 | Engine 1 HO2S | Not Ready / Ready | Ready | DTC P0135 HO2S Heater Circuit Sensor1
HO2S Sen. 1 | Engine 1 HO2S Catalyst | millivolts | 0 - 1000, constantly varying | Information Sensors
HO2S Sen. 2 | Engine 1 HO2S Catalyst | mIllivolts | 0 - 1000,varies | Information Sensors
HO2S Warm Up Sensor 1 / HO2S Warm Up Sensor 2 | HO2S | Min: Sec | Depends on startup intake air temperature, startup engine coolant temperature, and time to HO2S activity. | DTC P0135 HO2S Heater Circuit Sensor1
HO2S XCounts | HO2S | Counts | Varies | --
IAC Position | Engine 1 Engine 2 EGR Catalyst Misfire | Counts | 10 - 40 | Idle Air Control System Check
IAT | Engine 1 Engine 2 EVAP Catalyst HO2S | °C, °F | Varies with ambient air temperature. | DTC P0112 IAT Sensor Circuit Low Voltage
Ignition 1 | Engine 1 Engine 2 EGR HO2S | Volts | 13 (Varies) | DTC P0560 System Voltage
Ignition Mode | Engine 2 | IC / Bypass | IC | Electronic Ignition System
Injector Pulse Width | Engine 1 | milliseconds | 1.5 - 3.5 (Varies with engine load) | --
Knock Retard | Engine 2 | Degrees | 0° | Knock Sensor System
Long Term Fuel Trim | Engine 1 Misfire | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean
Loop Status | Engine 1 Catalyst HO2S Misfire | Open / Closed | Closed | DTC P0125 ECT Excessive Time to Closed Loop
Low Oil Lamp | Engine 2 | On / Off | Off | PCM Controlled Warning Lamps Diagnosis
MAF | Engine 1 Engine 2 Catalyst HO2S | gm/s | 3 - 6 gm/s at idle 13 - 16 gm/s at 2500 RPM (Depends on engine load and barometric pressure) | Information Sensors
MAF Frequency | Engine 1 | Hz | 1200 - 3000 (Depends on engine load and barometric pressure) | DTC P0102 MAF Sensor Circuit Low Frequency
MAP | Engine 1 Engine 2 EGR EVAP | kPa / Volts | 29 - 48 kPa / 1 - 2 Volts (Depends on engine load and barometric pressure). | DTC P0108 MAP Sensor Circuit High Voltage
MIL | Engine 2 | On / Off | Off | No Malfunction Indicator Lamp
Misfire Current Cylinder # | Misfire | Counts | 0 - 4 | DTC P0300 Engine Misfire Detected
Misfire History Cylinder # | Misfire | Counts | 0 | DTC P0300 Engine Misfire Detected
Misfiring Cylinder | Misfire | 0 - 6 | 0 | DTC P0300 Engine Misfire Detected
Oil Life Reset | Engine 2 | Released / Pressed | Released | --
Power Enrichment | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Rich/Lean Status | Engine 1 | Rich / Lean | Constantly changing | Fuel Metering Modes of Operation
Short Term Fuel Trim | Engine 1 Misfire | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean
Spark | Engine 2 | Degrees | -20° (varies) | Electronic Ignition System
Start Up ECT | EVAP HO2S | °C, °F | Depends on engine coolant temperature at time of startup | DTC P0135 HO2S Heater Circuit Sensor1
Start Up IAT | EVAP HO2S | °C, °F | Depends on intake air temperature at time of startup | DTC P0135 HO2S Heater Circuit Sensor1
Throttle at Idle | Engine 1 | Yes / No | Yes | --
Total Misfire Current Count | Misfire | Counts | 0 - 5 | DTC P0300 Engine Misfire Detected
Total Misfire Failures Since First Fail | Misfire | Counts | 0 | DTC P0300 Engine Misfire Detected
Total Misfire Passes Since First Fail | Misfire | Counts | 0 | DTC P0300 Engine Misfire Detected
TP Angle | Engine 1 Engine 2 EGR Catalyst HO2S

Misfire

Percent

0%

DTC P0121 TP Sensor Performance

TP Sensor | Engine 1 | Volts | 0.20 - 0.74 | DTC P0122 TP Sensor Circuit Low Voltage
Traction Control | Engine 2 | Active / Inactive | Inactive | ABS/TCS
Traction Control Desired Torque | Engine 2 | Percent | 80% - 95% | ABS/TCS
Traction Control Torque | Engine 2 | Percent | 5% - 20% (Varies with load) | ABS/TCS
Transmission Range | Engine 2 | Park / Reverse / Neutral / Drive 4 / Drive 3 / Drive 2 / Low | Park | DTC P0706 Transaxle Range Switch Performance
TR Switch P / A / B / C | Engine 2 | High / Low | Low / Low / High / High | DTC P0705 Trans Range Switch Circuit
TWC Protection | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Vehicle Speed | Engine 1 Engine 2 EGR Catalyst Misfire | MPH, Km/h | 0 | 4T65-E Automatic Transaxle Diagnosis
VTD Fuel Disable | Engine 2 | Active / Inactive | Inactive | DTC P1629 Theft Deterrent Crank Signal Malfunction
3X Crank Sensor | Misfire | Engine RPM | varies with engine RPM | Information Sensors / Switches
18X Crank Sensor | Misfire | Engine RPM | varies with engine RPM | Information Sensors / Switches