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 given 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 is determined:
| • | The Diagnostic System Check - Vehicle in Vehicle DTC Information is completed |
| • | No diagnostic trouble codes (DTCs). |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
The column labeled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:
Cooling/HVAC:: Cooling HVAC DataCruise/Traction: Cruise Control/Traction Data
Electrical Theft: Electrical/Theft Data
Eng: Engine data
EGR: Exhaust gas recirculation (EGR) data
EVAP: Evaporative emission (EVAP) data
FUEL TRIM: Fuel trim data
HO2S: Heated Oxygen Sensor (HO2S) data
Ignition: Ignition System data
IPC: IPC Data
Misfire: Misfire data
ODD: Output driver data
TAC Output: Throttle Actuator Control Data
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
A/C Disengage Reason | Cooling/HVAC | Swithed off/Pressure too high/pressure too low | Switched Off |
A/C High side Pressure | Cooling/HVAC | PSI | varies |
A/C High side Pressure | Cooling/HVAC | volts | varies |
A/C Off for WOT | Cooling/HVAC | Yes/No | No |
A/C Pressure Disable | Cooling/HVAC | Yes/No | No |
A/C Relay Circuit Status | ODD | OK/Fault/Invalid State | OK |
A/C Relay Circuit History | ODD, Cooling/HVAC | OK/Fault/Invalid State | OK |
A/C Relay Command | Eng, Misfire, EGR, Cooling/HVAC, TAC | On/Off | Off |
A/C Request Signal | Cooling/HVAC | Yes/No | No |
Air Fuel Ratio | Eng, Fuel Trim, HO2S | Ratio | 14.2:1-14.7:1 |
APP Indicated Angle | Cruise/Traction, Eng, EGR, EVAP, HO2S, Ignition, Misfire, TAC, Fuel Trim | Percent | 0 |
APP Sensor 1 | TAC | Volts | Varies |
APP Sensor 1 Circuit Status | TAC | OK/Not OK | OK |
APP Sensor 2 | TAC | Volts | Varies |
APP Sensor 2 Circuit Status | TAC | OK/Not OK | OK |
APP Sensor 1 | TAC | Percent | Varies |
APP Sensor 2 | TAC | Percent | Varies |
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
BARO | Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition | kPa | 65-110 kPa |
Catalytic Converter Protection Active | Fuel Trim, HO2S | Yes/No | No |
CKP Sensor | Ignition Data | RPM | varies |
CMP Sensor | Ignition | RPM | Varies |
CMP Sensor Signal Present | Ignition, Misfire | Yes/No | Yes |
Crank Request Signal | Electrical/Theft | Yes/No | No |
Cruise On/Off switch | Cruise/Traction | On/Off | Off |
Cruise Control Active | Cruise/Traction, IPC, TAC | Yes/No | No |
Cruise Disengage 1-6 History | Cruise/Traction | engage/disengage | -- |
Cruise Mode Signal | Cruise/Traction | Volts | varies |
Cruise Resume/Accel. Switch | Cruise/Traction | On/Off | Off |
Cruise Set/Coast Switch | Cruise/Traction | On/Off | Off |
Cycles of Misfire Data | Misfire | Counts | 0-99 |
Cyl. 1-6 Injector Circuit Status | ODD | OK/Stuck Low (Open)/Stuck High | OK |
Cylinder 1 and 4 IC Circuit Status | ODD | OK/Not OK | OK |
Cylinder 2 and 5 IC Circuit Status | ODD | OK/Not OK | OK |
Cylinder 3 and 6 IC Circuit Status | ODD | OK/Not OK | OK |
Cylinder 1-6 Injector Circuit History | ODD | OK/Stuck Low (Open)/Stuck High | OK |
Decel Fuel Cut-off | Eng, EGR, Fuel Trim, HO2S | Active/Inactive | Inactive |
Desired EGR Position | EGR, Misfire | Percent | 0 |
Desired Idle Speed | Cruise/Traction, Eng, EVAP, TAC | RPM | Varies |
Driver Module 1 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled |
Driver Module 2 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled |
Driver Module 3 Status | ODD | Enabled/Off-High Volts/Off High Temp/Invalid State | Enabled |
EC Ignition Relay Circuit Status | ODD | OK/ Fault/ Invalid State | OK |
EC Ignition Relay Circuit History | Electrical Theft, ODD | OK/ Fault/ Invalid State | OK |
ECT Sensor | Cooling/HVAC, Eng, EGR, EVAP, HO2S, IPC, Ignition, Misfire, Fuel Trim, TAC | °C/°F | Varies |
EGR Flow Test Count | EGR | Counts | 0 |
EGR Learned Minimum Position | EGR | Volts | 0.14-1.0 |
EGR Position Sensor | Eng, EGR, Misfire | Percent | 0% |
EGR Position Sensor | EGR | Volts | 0.6--0.7 volts |
EGR Position Variance | EGR | Percent | 0 |
EGR Solenoid Circuit History | ODD | OK/Open/Fault/ Invalid State | OK |
EGR Solenoid Circuit Status | ODD | OK/Fault/ Invalid State | OK |
EGR Solenoid Command | EGR | Percent | 0 |
Engine Hot Lamp Command | Cooling/HVAC | On/Off | Off |
Engine Load | Cooling/HVAC, Eng, Misfire, Fuel Trim, EVAP, EGR, HO2S, Ignition, TAC | Percent | Varies |
Engine Oil Life Remaining | IPC | Percent | Varies |
Engine Oil Pressure Switch | Eng, IPC | Low/OK | OK |
Engine Run Time | Cruise/Traction, Cooling/HVAC, Eng, EVAP, Misfire, Fuel Trim, EGR, HO2S, Ignition, TAC, ODD | Hr: Min: Sec | Varies |
Engine Speed | Cooling/HVAC, Cruise/TractionEng, EGR, Electrical/Theft, EVAP, Fuel Trim, HO2S, Ignition, IPC, Misfire, TAC | RPM | Varies |
EVAP Fault History | EVAP | Fault/No Fault | No Fault |
EVAP Purge Solenoid Circuit History | ODD | OK/Open/Short | OK |
EVAP Purge Solenoid Circuit Status | ODD | OK/Open/Short | OK |
EVAP Purge Solenoid Command | Eng, EVAP, Fuel Trim, HO2S | Percent | Varies |
EVAP Vent Solenoid Circuit History | ODD | OK/Open/Short | OK |
EVAP Vent Solenoid Circuit Status | ODD | OK/Open/Short | OK |
EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Venting |
FC Relay 1 Circuit History | Cooling/HVAC, ODD | OK/Fault/Invalid State | OK |
FC Relay 1 Command | Cooling/HVAC | On/Off | Off |
FC Relay 1 Circuit Status | ODD | OK/Fault/Invalid State | OK |
FC Relay 2 and 3 Circuit History | Cooling/HVAC, ODD | OK/Fault/Invalid State | OK |
FC Relay 2 and 3 Circuit Status | ODD | OK/Fault/Invalid State | OK |
FC Relay 2 and 3 Command | Cooling/HVAC | On/Off | Off |
Fuel Level Sensor | EVAP, IPC | Volts | Varies |
Fuel Pump Relay Circuit History | ODD | OK/Fault/Invalid State | OK |
Fuel Pump Relay Circuit Status | ODD | OK/Fault/Invalid State | OK |
Fuel Pump Relay Command | Eng | On/Off | On |
Fuel Tank Level Remaining | EVAP, IPC | Percent | 0-104 |
Fuel Tank Pressure Sensor | Eng, EVAP | mm Hg/in H2O | Varies |
Fuel Tank Pressure Sensor | EVAP | Volts | Varies |
Fuel Trim Cell | EVAP, Eng, Fuel Trim | 0-4 | 0 |
Fuel Trim Learn | Eng, EVAP, Fuel Trim | Enabled/Disabled | Enabled |
Generator L-Terminal Signal Command | Electrical/Theft | On/Off | On |
Generator Lamp Command | IPC Data, Electrical/Theft | On/Off | Off |
HO2S 1 | EVAP, Eng, Fuel Trim, HO2S | millivolts | 0-1000 and Varying |
HO2S 1 Ready | HO2S | Yes/No | Yes |
HO2S 2 | Eng, Fuel Trim, HO2S | millivolts | 0-1000 and Varying |
HO2S 1 Heater Command | HO2S | On/Off | On |
HO2S 2 Heater Command | HO2S | On/Off | On |
HO2S 1 Heater | HO2S | Amps | Varies |
HO2S 2 Heater | HO2S | Amps | Varies |
HO2S 1 Heater Circuit History | ODD | OK/Fault/ Invalid State | OK |
HO2S 2 Heaster Circuit History | ODD | OK/Fault/ Invalid State | OK |
HO2S 1 Heater Circuit Status | ODD | OK/Fault/ Invalid State | OK |
HO2S 2 Heater Circuit Status | ODD | OK/Fault/ Invalid State | OK |
Hot Open Loop | Cooling/HVAC, Fuel Trim, HO2S | Active/Inactive | Inactive |
IAT Sensor | Cooling/HVAC, Eng, EVAP, EGR, Fuel Trim, HO2S, Ignition, Misfire, TAC | °C/°F | Varies |
Ignition 1 Signal | Cooling/HVAC, Cruise/Traction, Electical/Theft, EVAP, Eng, EGR, Fuel Trim, HO2S, Ignition, IPC, Misfire, TAC | Volts | 12.6 volts or more (varies) |
Ignition Off Time | EVAP, Eng | Minutes/ Varies | Varies |
Initial Brake Apply Signal | TAC | Released/ Applied | Released |
Injector PWM | Fuel Trim, HO2S, Misfire | milliseconds | Varies |
Knock Retard | EGR, Ignition | Degrees | 0 |
KS Activity | Ignition | Yes/No | No |
Long Term FT | Eng, EVAP, Fuel Trim, HO2S | Percent | -10 to +10% |
Long Term FT Average | Fuel Trim | Percent | varies |
Loop Status | Eng, Fuel Trim, EVAP, HO2S | Open/Closed | Closed |
MAF Sensor | Eng, EGR, Misfire, EVAP, Fuel Trim, HO2S, Ignition, TAC | g/s | 3-6 (Varies with altitude) |
MAF Sensor | EVAP, Fuel Trim, HO2S, Misfire, TAC | Hz | 1,200-3,000 (Depends on altitude) |
MAP Sensor | Eng, EGR, Fuel Trim, HO2S, Misfire, TAC | Volts | 0.4-2.0 Volts |
MAP Sensor | Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, EGR, TAC | kPa | 20-48 kPa (Varies with altitude) |
MIL Circuit History | IPC, ODD | OK/Fault/Invalid State | OK |
MIL Command | EVAP, Eng, EGR, Ignition, IPC | On/Off | Off |
MIL Circuit Status | ODD | OK/Fault/Invalid State | OK |
Mileage Since DTC Cleared | Eng | km/h /mph | Varies |
Misfire Current Cyl. 1-6 | Misfire | Counts | 0 |
Misfire History Cyl. 1-6 | Misfire | Counts | 0 |
Moderate Brake Apply Signal | TAC | Applied/Released | Released |
Number of DTCs | Eng | Number | 0 |
PCM Reset | EGR, Eng, EVAP, Ign, ODD | Yes/No | No |
Power Enrichment | Eng, Fuel Trim, HO2S, Misfire | Active/Inactive | Inactive |
Reduced Engine Power | HO2S, TAC | Active/Inactive | Inactive |
Short Term FT | Eng, EVAP, Fuel Trim, HO2S, | Percent | -10 to +10% |
Spark | Cooling/HVAC, Cruise/Traction, Eng, Misfire, Fuel Trim, HO2S, Ignition | Degrees | 16° (varies) |
Start Up ECT | Cooling/HVAC, EVAP, Fuel Trim, HO2S | °C/°F | Varies |
Start Up IAT | EVAP, Fuel Trim, HO2S | °C/°F | Varies |
Starter Relay Circuit Status | ODD | OK/ Fault | OK |
Starter Relay Circuit History | Electrical/Theft, ODD | OK/ Fault/ Invalid State | OK |
Starter Relay Command | Electrical/Theft | On/Off | Off |
Stop Lamp Pedal Switch | Cruise/Traction, Eng, Electrical/Theft, TAC | Released/Applied | Released |
Stop Lamp Switch Signal | Electrical/Theft, Cruise/Traction, TAC | volts | Varies |
TAC/PCM Communications Signal | Cruise/Traction, TAC | OK/ Fault | OK |
TAC Stop Lamp Pedal Switch | Cruise/Traction, Electrical/Theft, TAC | Applied/Released | Released |
TAC Vehicle Speed Signal | TAC | OK/Fault | OK |
TCS Delivered Torque Circuit Status | ODD | OK/ Fault | OK |
Torque Request Signal | Cruise/Traction, TAC | Percent | 100% |
Torque Delivered Signal | TAC | Percent | 75% |
Total Misfire Count | Misfire | 1-255 | 0 |
TP Desired Angle | Cruise/Traction, TAC | Percent | Varies |
TP Indicated Angle | Cruise/Traction, EGR, Eng , Fuel Trim, HO2S, Ignition, EVAP, Misfire, TAC | Percent | % |
TP Sensor 1 | TAC | Percent | Varies |
TP Sensor 1 | TAC | Volts | Varies |
TP Sensors 1 and 2 | TAC | Agree/ Disagree | Agree |
TP Sensor 1 Circuit Status | TAC | OK/Not OK | OK |
TP Sensor 2 | TAC | Percent | Varies |
TP Sensor 2 | TAC | Volts | Varies |
TP Sensor 2 Circuit Status | TAC | OK/Not OK | OK |
Traction Control Status | Cruise/Traction, TAC | Active/Inactive | Inactive |
TWC Temperature Calculated | Fuel Trim, Misfire | °C/°F | varies |
Vehicle Security Status | Electrical/Theft | OK/Not OK | OK |
Vehicle Speed Circuit History | ODD | OK/ Fault/ Invalid State | OK |
Vehicle Speed Circuit Status | ODD | OK/ Fault/ Invalid State | OK |
Vehicle Speed Sensor | Cooling HVAC, Cruise/Traction, Eng, EGR, EVAP, HO2S, Ignition, IPC, Fuel Trim, Misfire, TAC | mph/ km/h | 0 |
Warm-ups w/o Emission Faults | Eng | 1-10 | varies |
Warm-ups w/o Non-Emission Faults | Eng | 1-10 | varies |
