Use the Typical Scan Data Values table only after the Powertrain On-Board Diagnostic System Check has been completed, no DTCs 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
| • | ENGINE 1 DATA - Contains general information regarding fuel delivery and basic engine operating conditions. |
| • | ENGINE 2 DATA - Contains general information regarding IC, KS, A/C, and basic engine operating conditions. |
Specific Engine Data
| • | EGR DATA - 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 DATA - Contains information specific to the EVAP system diagnostics. Also displays parameters required to verify proper EVAP system operation. |
| • | CATALYST DATA - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation. |
| • | HO2S DATA - Contains information specific to the Heated Oxygen Sensor diagnostics and parameters required to verify proper HO2S operation. |
| • | MISFIRE DATA - Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire. |
| • | CRUISE CONTROL DATA - Contains information specific to the cruise control diagnostics and parameters to verify proper cruise control operation. |
| • | TAC DATA - Contains information specific to the electronic throttle control system and parameters to verify proper Throttle Actuation Control operation. |
Typical Scan Tool Data Values
Engine Idling, Radiator Hose Hot, Closed Throttle, Park or Neutral, Closed Loop, Brake Pedal Released, Accessories Off
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference |
|---|---|---|---|---|
3X Crank Sensor | Misfire | RPM | Varies | DTC P1374 3X Reference Signal |
18X Crank Sensor | Misfire | RPM | Varies | DTC P0336 18X Reference Signal Circuit |
A/C High Side Pressure | Engine 2 | Volts | Varies with refrigerant temperature | DTC P0530 A/C Refrigerant Pressure Sensor Circuit or PCM controlled Air Conditioning Diagnosis |
A/C Pressure Out Of Range | Engine 2 | Yes / No | No (Yes with low or high A/C refrigerant pressure) | DTC P0530 A/C Refrigerant Pressure Sensor Circuit or PCM controlled Air Conditioning Diagnosis |
A/C Request | Engine 2 Catalyst Misfire | Yes / No | No (Yes with A/C ON) | DTC P1546 A/c Relay Control Circuit or PCM Controlled Air Conditioning Diagnosis |
Actual EGR Position | Engine 1 Engine 2 EGR Misfire | Percent | 0% | DTC P1404 EGR Valve Closed Pintle Position |
Air/Fuel Ratio | Engine 1 Catalyst HO2S | Ratio | 14.2:1-14.7:1 | Fuel Metering Modes of Operation |
APP Average | Engine 1 Engine 2 EGR Catalyst HO2S Cruise TAC | Counts | Varies | Electronic Throttle Control System |
APP Indicated Angle | Engine 1 Engine 2 EGR Catalyst HO2S Cruise TAC | Percent | 0 | DTC P1125 APP System |
APP Sensor 1 / 2 / 3 | TAC | Volts | 0.8-1.0 V | DTC P1275, P1280 or P1285 |
APP Sensor Angle 1 / 2 / 3 | TAC | Percent | 0 | DTC P1275, P1280 or P1285 |
APP Sen. 1 and 2 / 1 and 3 / 2 and 3 Disagree | TAC | Yes / No | No | DTC P1276, P1281 or P1286 |
APP Sensor 1 / 2 / 3 Out of Range | TAC | Yes / No | No | DTC P1275, P1280 or P1285 |
BARO | Engine 1 Engine 2 EGR EVAP Catalyst | kPa / Volts | 65 - 110 kPa (Depends on barometric pressure). | Information Sensors |
Cam Signal Present | Misfire | Yes / No | Yes | DTC P0341 CMP Sensor Circuit Performance |
Clutch Anticipate Switch | Cruise (with Manual Transmission) | Applied / Released | Released | DTC P0704 Clutch Switch Circuit |
Commanded A/C | Engine 2 Catalyst Misfire | On / Off | Off (On with A/C compressor engaged) | PCM Controlled Air Conditioning |
Commanded Fan 1/ Commanded Fan 2 | Engine 2 Catalyst | On / Off | Off (On with fans running) | Electric Cooling Fan Diagnosis |
Commanded Gen | Engine 1 | On / Off | On | DTC P0560 System Voltage |
Cruise | Cruise TAC | Engaged/Disengaged | Disengaged | DTC P0567, P0568, P0571 or Cruise Control Diagnosis |
Cruise Disengage Hist. 1 / 2 / 3 / 4 / 5 / 6 | Cruise | Go to Cruise Control Disengage Definitions | None | DTC P0567, P0568, P0571 or Cruise Control Diagnosis |
Cruise Release Switch | Cruise TAC | Applied/Released | Released with brake pedal and/or clutch pedal released | DTC P0571 Cruise Brake Switch Circuit or Cruise Control Diagnosis |
Cruise Resume/Accel | Cruise TAC | On / Off | Off | DTC P0567 Cruise Resume Circuit or Cruise Control Diagnosis |
Cruise Set Coast | Cruise TAC | On / Off | Off | DTC P0568 Cruise Set Circuit or Cruise Control Diagnosis |
Cruise Switch | Cruise TAC | On / Off | Off | DTC P0567 or P0568 or Cruise Control Diagnosis |
Current Gear | Engine 1 | 1 / 2 / 3 / 4 | 1 | Automatic/Manual Transmission Diagnosis |
Decel Fuel Mode | Engine 1 Engine 2 Catalyst HO2S Misfire Cruise TAC | Active / Inactive | Inactive | Fuel Metering Modes of Operation |
Desired EGR Position | Engine 1 Engine 2 EGR Misfire | Percent | 0% | DTC P1404 EGR Valve Closed Pintle Position |
Desired Idle Speed | Engine 1 Engine 2 EVAP Cruise TAC | RPM | PCM commanded idle speed (varies with temperature). | DTC P0506 or P0507 |
ECT | Engine 1 Engine 2 EGR EVAP Catalyst HO2S Misfire | °C, °F | 85°C - 105°C / 185°F - 220°F (varies with temperature) | P0117, P0118 or P0125 |
EGR Closed Valve Pintle Position | EGR | Volts | 0.14-1.0 volt | DTC P1404 EGR Valve Closed Pintle Position |
EGR Duty Cycle | EGR | Percent | 0% | DTC P1404 EGR Valve Closed Pintle Position |
EGR Feedback | EGR | Volts | 0.14 - 1.0 volt | DTC P1404 EGR Valve Closed Pintle Position |
EGR Flow Test Count | EGR | Counts | 0 - 10 | DTC P1404 EGR Valve Closed Pintle Position |
EGR Position Error | EGR | Percent | 0% - 100% | DTC P1404 EGR Valve Closed Pintle Position |
Engine Load | Engine 1 Engine 2 Catalyst Misfire Cruise TAC | Percent | 2% - 5% | Engine Load |
Engine Run Time | Engine 1 Engine 2 EVAP Catalyst Cruise TAC | Hr: Min: Sec | Depends on time since startup. | Engine Run Time |
Engine Speed | Engine 1 Engine 2 EGR EVAP Catalyst HO2S Misfire Cruise TAC | RPM | ± 100 RPM from Desired Idle Speed | Engine Speed |
EVAP Canister Purge | EVAP HO2S | Percent | 0% - 25% (varies) | DTC P0443 or EVAP Control System Diagnosis |
EVAP Fault History | EVAP | No Fault / Excess Vacuum / Purge Valve Leak / Small Leak / Weak Vacuum | No Fault | EVAP Control System Diagnosis |
EVAP Vent Solenoid | EVAP | Open / Closed | Varies | DTC P0449 or EVAP Control System Diagnosis |
Fuel Level | EVAP | Percent | Varies | DTC P0462, P0463 or Fuel System Diagnosis |
Fuel Pump | Engine 2 | On / Off | On | DTC P0230 or Fuel Pump Relay Diagnosis |
Fuel Tank Pressure | EVAP | in H2O / Volts | Varies | DTC P0452, P0453 or EVAP Control System Diagnosis |
Fuel Trim Cell | Engine 1 Misfire | Cell # | 0 | DTC P0171, P0172, P0174 or P01752 |
Fuel Trim Learn | Engine 1 Catalyst | Enabled / Disabled | Varies | Fuel Metering Modes of Operation |
HO2S Bank 1 Sensor 1 / HO2S Bank 2 Sensor 1 | Engine 1 Catalyst HO2S | Not Ready / Ready | Ready | Information Sensors |
HO2S Bank 1 Sensor 1 / HO2S Bank 2 Sensor 1 | Engine 1 Catalyst HO2S | millivolts | 0 - 1000, constantly varying | Information Sensors |
HO2S Bank 1 Sensor 3 | Engine 1 Catalyst HO2S | millivolts | 0 - 1000 (Varies) | Information Sensors |
HO2S Warm-Up Bank 1 Sensor 1 / Bank 2 Sensor 1 / Bank 1 Sensor 3 | HO2S | Min: Sec | Depends on startup intake air temperature, startup engine coolant temperature, and time to HO2S activity. | Information Sensors |
HO2S X Counts Bank 1 / HO2S X Counts Bank 2 | HO2S | Counts | Varies | -- |
IAT | Engine 1 Engine 2 EVAP Catalyst HO2S | °C, °F | Varies with ambient air temperature. | DTC P0112 or P0113 |
Ignition 1 | Engine 1 Engine 2 EGR HO2S Cruise TAC | Volts | Varies | DTC P0560 System Voltage |
Ignition Mode | Engine 2 | IC / Bypass | IC | Electronic Ignition System |
Injector Pulse Width | Engine 1 Catalyst | milliseconds | 1.5 - 3.5 (Varies with engine load) | DTC P0201, P0202, P0203, P0204, P0205 or P0206 |
Knock Retard | Engine 2 | Degrees | 0° | DTC P0325, P0327 or P0332 |
Long Term Fuel Trim BN1 | Engine 1 Misfire | Percent | -10% - 10% | DTC P0171 or P0172 |
Long Term Fuel Trim BN2 | Engine 1 Misfire | Percent | -10% - 10% | DTC P0174 or P0175 |
Loop Status | Engine 1 Catalyst HO2S Misfire | Open / Closed | Closed | Fuel Metering Modes of Operation |
MAF | Engine 1 Engine 2 Catalyst HO2S TAC | gm/s | 3 - 6 gm/s at idle (Depends on barometric pressure) | DTC P0102 or P0103 |
MAF Frequency | Engine 1 | Hz | 1200 - 3000 (Depends on barometric pressure) | DTC P0102 or P0103 |
MAP | Engine 1 Engine 2 EGR EVAP TAC | kPa / Volts | 20 - 48 kPa / 0.75 - 2 Volts (Depend on barometric pressure). | DTC P0107 or P0108 |
MIL | Engine 2 | On / Off | Off | P0650 MIL Control Circuit or No Malfunction Indicator Lamp |
Misfire Current Cylinder 1 / 2 / 3 / 4 / 5 / 6 | Misfire | Counts | 0 | DTC P0300 Engine Misfire Detected |
Misfire History Cylinder 1 / 2 / 3 / 4 / 5 / 6 | Misfire | Counts | 0 | DTC P0300 Engine Misfire Detected |
Misfiring Cylinder Primary | Misfire | 0 / 1 / 2 / 3 / 4 / 5 / 6 | 0 | DTC P0300 Engine Misfire Detected |
Misfiring Cylinder Secondary | Misfire | 0 / 1 / 2 / 3 / 4 / 5 / 6 | 0 | DTC P0300 Engine Misfire Detected |
Power Enrichment | Engine 1 Engine 2 Catalyst HO2S Misfire Cruise TAC | Active / Inactive | Inactive | Fuel Metering Modes of Operation |
Reduced Engine Power | Engine 1 Engine 2 EGR Catalyst HO2S Misfire Cruise TAC | Active / Inactive | Inactive | Active indicates either a ETC system Problem or drivetrain abuse protection |
Rich/Lean Bn1 | Engine 1 | Rich / Lean | Constantly changing | Fuel Metering Modes of Operation |
Rich/Lean Bn2 | Engine 1 | Rich / Lean | Constantly changing | Fuel Metering Modes of Operation |
Short Term Fuel Trim BN1 | Engine 1 Catalyst Misfire | Percent | -10% - 10% | DTC P0171 or P0172 |
Short Term Fuel Trim BN2 | Engine 1 Catalyst Misfire | Percent | -10% - 10% | DTC P0174 or P0175 |
Spark | Engine 2 | Degrees | 20° (varies) | Electronic Ignition System |
Starter Inhibit | Engine 2 | Active / Inactive | Inactive | Theft Deterrent System |
Start Up ECT | EVAP HO2S | °C, °F | Varies | DTC P0125 ECT Excessive Time to Closed Loop |
Start Up IAT | EVAP HO2S | °C, °F | Depends on intake air temperature at time of startup | DTC P0125 ECT Excessive Time to Closed Loop |
TAC Brake Switch | Cruise TAC | Applied / Released | Released | DTC P1574 Stoplamp Control Circuit |
TAC/PCM Communication | Engine 1 Engine 2 EGR Catalyst HO2S Cruise TAC | OK/Fault | OK | DTC P1518 PCM to TAC Module Serial Data Circuit |
Total Misfire Current Count | Misfire | Counts | 0 | 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 Desired Angle | Engine 1 Engine 2 EGR Catalyst HO2S Cruise TAC | Percent | 1-4 % | DTC P1120, P1220 or P1221 |
TP Indicated Angle | Engine 1 Engine 2 EGR Catalyst HO2S Misfire Cruise TAC | Percent | 1-4 % | information Sensors |
TP Sensor 1 / 2 | TAC | Volts | 0.5-1.2 V | DTC P1120 or P1220 |
TP Sensor 1 /2 Angle | TAC | Percent | 2-4 % | DTC P1120 or P1220 |
TP Sensors Disagree | TAC | Yes / No | No | DTC P1221 TP Sensor 1-2 Performance |
TP Sensor 1 / 2 Out of Range | TAC | Yes / No | No | DTC P1120 or P1220 |
Transmission Range | Cruise (wit Auto Transmission) | Park / Reverse / Neutral / Drive 4 / Drive 3 / Drive 2 / Low | Park | Automatic Transmission Diagnosis |
TR Switch A / B / C | Cruise (with Auto Transmission) | Low/High | Varies depending on gear selected | Automatic Transmission Diagnosis |
TWC Protection | Engine 1 Engine 2 Catalyst HO2S Misfire Cruise TAC | Active / Inactive | Inactive | Fuel Metering Modes of Operation |
Vehicle Speed | Engine 1 Engine 2 EGR Catalyst Misfire Cruise TAC | MPH , Km/h | 0 | Automatic/ Manual Transmission Diagnosis |
VTD Fuel Disable | Engine 2 | Active / Inactive | Inactive | DTC P1629 Theft Deterrent Crank Signal Malfunction |
