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
| • | CATALYST - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation. |
| • | 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 Evaporative Emissions (EVAP) control system. Also displays parameters required to verify proper EVAP 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. |
Important: Use the Typical Scan Data Value only after the following conditions
are met:
• The Powertrain On-Board Diagnostic System Check has been completed. • The engine is idling unless checking a value at a specified RPM. • The lower radiator hose is hot. • The throttle is closed unless checking a value at a specified
RPM. • The vehicle is in PARK or NEUTRAL. • The vehicle is operating in Closed Loop. • The vehicle accessories are turned off.
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 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit |
A/C Pressure Out Of Range | Engine 2 | 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 | Engine 2 Catalyst Misfire | Yes / No | No (Yes with A/C ON) | Powertrain Control Module Controlled Air Conditioning (A/C) Circuit Diagnosis |
Actual EGR Position | Engine 1 Engine 2 EGR Misfire | Percent | 0% | DTC P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance |
Air/Fuel Ratio | Engine 1 Catalyst HO2S | Ratio | 14.2:1 - 14.7:1 | |
Boost Solenoid PWM | Engine 2 | Percent | 0% | |
BARO | Engine 1 Engine 2 EGR EVAP Catalyst` | kPa / Volts | 65 - 110 (Depends on altitude and barometric pressure). | DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage |
Commanded A/C | Engine 2 Catalyst Misfire | 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 | Engine 2 Catalyst | On / Off | Off (On with fans running) | |
Commanded Gen | Engine 1 | On / Off | On | |
Commanded Starter | Engine 2 | Enabled / Disabled | Disabled | |
Cruise | Engine 1 | Engaged / Disengaged | No | |
Cruise Inhibited | Engine 1 | Yes / No | Yes | |
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 | |
Desired EGR Position | Engine 1 EGR Misfire | Percent | 0% | DTC P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance |
Desired Idle Speed | Engine 1 Engine 2 EVAP Catalyst | RPM | PCM commanded idle speed (varies with temperature). | |
ECT | All | °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 | EGR | Volts | 0.14-1.0 volt | DTC P1404 Exhaust Gas Recirculation (EGR) Closed Position Performance |
EGR Duty Cycle | EGR | Percent | 0% | |
EGR Feedback | EGR | Volts | 0.14 - 1.0 volt | DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage |
EGR Flow Test Count | EGR | Counts | 0 - 10 | |
EGR Position Error | EGR | Percent | 0% - 9% | DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance |
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 Life | Engine 2 | Percent | 0%-100% (varies) | -- |
EOP Sensor | Engine 2 | Volts | 2 - 3V | DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage |
Engine Run Time | Engine 1 Engine 2 EVAP Catalyst | Hr: Min: Sec | Depends on time since startup. | -- |
Engine Speed | All | RPM | ±100 RPM from Desired Idle | -- |
EVAP Canister Purge | EVAP HO2S | Percent | 0% - 25% (varies) | |
EVAP Fault History | EVAP | Fault / No Fault | No Fault | -- |
Fuel Pump | Engine 2 | On / Off | On | |
Fuel Pump Speed | Engine 2 | Normal / High | Normal | |
Fuel Level | EVAP | Percent | Depends on the amount of fuel in the tank | -- |
Fuel Tank Pressure | EVAP | in H2O / Volts | 0 in H2O / 1.5V | |
Fuel Trim Cell | Engine 1 | Cell # | 0 | |
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 | |
HO2S Sen. 1 | Engine 1 HO2S Catalyst | millivolts | 0 - 1000, constantly varying | |
HO2S Sen. 2 | Engine 1 HO2S Catalyst | millivolts | 0 - 1000,varies | |
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. | |
HO2S XCount | HO2S | Counts | Varies | -- |
IAC Position | Engine 1 Engine 2 EGR Catalyst Misfire | Counts | 10 - 40 | |
IAT | Engine 1 Engine 2 EVAP Catalyst HO2S | °C, °F | Varies with ambient air temperature. | DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage |
Ignition 1 | Engine 1 Engine 2 EGR HO2S | Volts | 13 (Varies) | |
Ignition Mode | Engine 2 | IC / Bypass | IC | |
Injector Pulse Width | Engine 1 Catalyst | milliseconds | 1.5 - 3.5 (Varies with engine load) | -- |
Long Term Fuel Trim | Engine 1 Misfire | Percent | -10% to 10% | |
Loop Status | Engine 1 Catalyst HO2S Misfire | Open / Closed | Closed | DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control |
Knock Retard | Engine 2 | Percent | 0% | |
MAF | Engine 1 Engine 2 Catalyst HO2S | g/s | 3 - 6 g/s at idle 13 - 16 g/s at 2500 RPM (Depends on engine load and barometric pressure) | |
MAF Frequency | Engine 1 | Hz | 1200 - 3000 (Depends on engine load and barometric pressure) | |
MAP | Engine 1 Engine 2 EGR EVAP | kPa / Volts | 29 - 48 kPa / 1 - 2 Volts (Depends on engine load and barometric pressure). | |
MIL | Engine 2 | On / Off | Off | |
Misfire Current Cylinder # | Misfire | Counts | 0 - 4 | |
Misfire History Cylinder # | Misfire | Counts | 0 | |
Misfiring Cylinder | Misfire | 0 - 6 | 0 | |
Power Enrichment | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | |
Rich/Lean | Engine 1 | Rich / Lean | Constantly changing | |
Short Term Fuel Trim | Engine 1 Catalyst Misfire | Percent | -10% -to 10% | |
Spark | Engine 2 | Degrees | -20° (varies) | |
Start Up ECT | EVAP HO2S | °C, °F | Depends on engine coolant temperature at time of startup | |
Start Up IAT | EVAP HO2S | °C, °F | Depends on intake air temperature at time of startup | |
Throttle at Idle | Engine 1 | Yes / No | Yes | -- |
Total Misfire Current Count | Misfire | Counts | 0 - 5 | |
Total Misfire Failures Since First Fail | Misfire | Counts | 0 | |
Total Misfire Passes Since First Fail | Misfire | Counts | 0 | |
TP Angle | Engine 1 Engine 2 EGR Catalyst HO2S Misfire | Percent | 0% | |
TP Sensor | Engine 1 | Volts | 0.20 - 0.74 | |
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 Catalyst | Park / Reverse / Neutral / Drive 4 / Drive 3 / Drive 2 / Low | Park | |
TR Switch P / A / B / C | Engine 2 | High / Low | Low / Low / High / High | |
TWC Diagnostic | Catalyst | Enabled / Disabled | Enabled | |
TWC Monitor Test Counter | Catalyst | Counts | 0 | |
TWC Protection | Engine 1 Engine 2 Catalyst HO2S Misfire | Active / Inactive | Inactive | |
Vehicle Speed | Engine 1 Engine 2 EGR Catalyst Misfire | MPH, Km/h | 0 | 4T65-E Automatic Transaxle Diagnosis |
