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, KS, EVAP, 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.

• | 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 | Units Displayed | Typical Data Value | Reference
--- | --- | --- | ---
A/C Off For WOT | Yes / No | No | --
A/C Refrigerant Pressure | Volts | Varies with refrigerant temperature | DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit
A/C Pressure Out Of Range | Yes / No | No (Yes with low or high A/C refrigerant pressure) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis
A/C Request | Yes / No | No (Yes with A/C ON) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis
A/C Slugging | Active / Inactive | Inactive | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis
Actual EGR Position | Percent | 0% | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
Air/Fuel Ratio | Ratio | 14.2:1 - 14.7:1 | DTC P0171 Fuel Trim System Lean
BARO | kPa | 65 - 110 (Depends on altitude and barometric pressure). | DTC P0106 Manifold Absolute Pressure (MAP) System Performance
Boost Sol. PWM | Percent | 100% | Boost Control System Check
Commanded A/C | On / Off | Off (On with A/C compressor engaged) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis
Commanded Fan 1/Commanded Fan 2 | On / Off | Off (On with low speed fans running) | Electric Cooling Fan Diagnosis
Commanded Gen | On / Off | On | DTC P0560 System Voltage
Commanded TCC | Engaged / Disengaged | Disengaged | 4T60-E Automatic Transaxle Diagnosis
Cruise Engaged | Yes / No | No | DTC P1554 Cruise Control Feedback Circuit
Cruise Inhibited | Yes / No | Yes | DTC P1554 Cruise Control Feedback Circuit
Current Gear | 1 / 2 /3 / 4 | 1 | 4T60-E Automatic Transaxle Diagnosis
Decel Fuel Mode | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Delivered Torque | Percent | 5% - 20% (Varies with load) | ABS/TCS
Desired EGR Position | Percent | 0% | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
Desired Idle | RPM | PCM commanded idle speed (varies with temperature). | DTC P0506 Idle Speed Low
Desired Torque | Percent | 80% - 95% | ABS/TCS
ECT | °C, °F | 85°C - 105°C / 185°F - 220°F (varies with temperature). | DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
EGR Closed Valve Pintle Position | Volts | 0.14-1.0 volt | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
EGR Duty Cycle | Percent | 0% | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
EGR Feedback | Volts | 0.14 - 1.0 volt | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
EGR Position Error | Percent | 0% - 9% | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
EGR Test Count | Counts | 0 - 10 | DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
Engine Load | Percent | 2% - 5% at idle 7% - 10% at 2500 RPM | --
Engine Oil Level | Ok / Low | Ok | Information Sensors
Engine Oil Life | Percent | 0%-100% (varies) | --
Engine Run Time | Hr: Min: Sec | Depends on time since startup. | --
Engine Speed | RPM | ±100 RPM from Desired Idle | --
EVAP Canister Purge / EVAP Purge PWM | Percent | 0% - 25% (varies) | Evaporative Emission Control System Evaporative Emission Control System
EVAP Vacuum Switch | Purge / No Purge | No Purge (Purge if over 25% EVAP Purge PWM is commanded). | Evaporative Emission Control System
EVAP Vent Sol. | Open / Closed | Open | Evaporative Emission Control System
Fuel Level Sen. | Percent | 0%-100% (varies) | Evaporative Emission Control System
Fuel Pump | On / Off | On | Fuel Supply Components
Fuel Pump Speed | Normal / High | Normal | Fuel Supply Components
Fuel Tank Pressure | In. H2O | 0 | Evaporative Emission Control System
Fuel Trim Cell | Cell # | 0 | DTC P0171 Fuel Trim System Lean
Fuel Trim Learn | Disabled / Enabled | Enabled | --
Gen PWM / Gen F Terminal | Percent | Varies | Charging System
Generator Lamp | On / Off | Off | Powertrain Control Module Controlled Warning Lamps
HO2S Sen. 1 | Not Ready / Ready | Ready | DTC P0135 HO2S Heater Performance Sensor 1
HO2S Sen. 1 | millivolts | 0 - 1000, constantly varying | Information Sensors
HO2S Sen. 2 | mIllivolts | 0 - 1000,varies | Information Sensors
HO2S Warm-Up Sensor 1 / HO2S Warm-Up Sensor 2 HO2S Warm Up Time | Min: Sec | Depends on startup intake air temperature, startup engine coolant temperature, and time to HO2S activity. | DTC P0135 HO2S Heater Performance Sensor 1
HO2S XCount | Counts | Varies | --
IAC Position | Counts | 10 - 40 | DTC P0506 Idle Speed Low
IAT | °C, °F | Varies with ambient air temperature. | DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
Idle Speed Error | RPM | Less than 100 | DTC P0506 Idle Speed Low
Ignition 1 | Volts | 13 (Varies) | DTC P0560 System Voltage
Ignition Mode | IC / Bypass | IC | Electronic Ignition (EI) System
Injector Pulse Width | milliseconds | 1.5 - 3.5 (Varies with engine load) | --
Knock Retard | Degrees | 0° | Knock Sensor (KS) System
KS Active Counter / KS Activity | Yes / No | No | Knock Sensor (KS) System
KS Minimum Learned Noise | Volts | 0.1 - 3.0 (varies) | Knock Sensor (KS) System
KS Noise Channel | Volts | 0.1 - 3.0 (varies) | Knock Sensor (KS) System
Long Term Fuel Trim | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean
Loop Status | Open / Closed | Closed | DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
Low Oil Lamp | On / Off | Off | Powertrain Control Module Controlled Warning Lamps
MPH / km/h | MPH, Km/h | 0 | 4T60-E Automatic Transaxle Diagnosis
MAF | 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 | Hz | 1200 - 3000 (Depends on engine load and barometric pressure) | DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
MAP | kPa / Volts | 29 - 48 kPa / 1 - 2 Volts (Depends on engine load and barometric pressure). | Information Sensors
MIL | On / Off | Off | Malfunction Indicator Lamp (MIL) Inoperative
Misfire Cur. #1-#6 | Counts | 0 - 4 | DTC P0300 Engine Misfire Detected
Misfire Failures Since First Fail | Counts | 0 | DTC P0300 Engine Misfire Detected
Misfire Hist. #1-#6 | Counts | 0 | DTC P0300 Engine Misfire Detected
Misfire Passes Since First Fail | Counts | 0 | DTC P0300 Engine Misfire Detected
Oil Level | Ok / Low | Ok | Information Sensors
Oil Life Switch | Pressed/Released | Released | DTC P1619 Engine Oil Life Monitor Reset Switch Circuit
Park/Neutral Position | P-N / R-DL | P-N | DTC P0706 Trans Range Switch Performance
Power Enrichment | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Rich/Lean | Rich / Lean | Constantly changing | Fuel Metering Modes of Operation
Shift Mode Sw. | Normal / Performance | Normal | 4T60-E Automatic Transaxle Diagnosis
Short Term Fuel Trim | Percent | -10% - 10% | DTC P0171 Fuel Trim System Lean
Spark | Degrees | -20° (varies) | Modes of Operation - General Description
Start Up ECT | °C, °F | Depends on engine coolant temperature at time of startup | Evaporative Emission Control System
Start Up IAT | °C, °F | Depends on intake air temperature at time of startup | Evaporative Emission Control System
TCC Enable | On / Off | Off | 4T60-E Transaxle Diagnosis
Throttle at Idle | Yes / No | Yes | --
Total Misfire Current Count | Counts | 0 - 5 | DTC P0300 Engine Misfire Detected
Total Misfire Failures Since First Fail - refer to Misfire Failures Since First Fail | Counts | 0 | DTC P0300 Engine Misfire Detected
Total Misfire Passes Since First Fail - refer to Misfire Passes Since First Fail | Counts | 0 | DTC P0300 Engine Misfire Detected
TP Angle | Percent | 0% | DTC P0121 Throttle Position (TP) Sensor Performance
TP Sensor | Volts | 0.20 - 0.74 | DTC P0121 Throttle Position (TP) Sensor Performance
Traction Control | Active / Inactive | Inactive | ABS/TCS
Transmission Range | Park / Reverse / Neutral / Drive 4 / Drive 3 / Drive 2 / Low | Park | DTC P0706 Trans Range Switch Performance
TR P A B C | X / 0 | 0 0 X X | DTC P0705 Trans Range Switch Circuit
Traction Control Desired Torque | Percent | 80% - 95% | ABS/TCS
Traction Control Torque | Percent | 5% - 20% (Varies with load) | ABS/TCS
Trans Hot Mode | Active / Inactive On/Off | Inactive Off | 4T60-E Transaxle Diagnosis
TWC Diagnostic | Enabled / Disabled | Enabled | DTC P0420 Catalyst System Low Efficiency
TWC Monitor Test Counter | Counts | 0 | DTC P0420 Catalyst System Low Efficiency
TWC Protection | Active / Inactive | Inactive | Fuel Metering Modes of Operation
Vehicle Speed | MPH, Km/h | 0 | 4T60-E Automatic Transaxle Diagnosis
VTD Fuel Disable | Active / Inactive | Inactive | DTC P1629 Theft Deterrent Fuel Enable Signal Not Received