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 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:
Eng: Engine DataAIR: AIR Data (L26 and NU3 only)
EGR: EGR Data
EVAP: EVAP Data
FUEL TRIM: Fuel trim Data
HO2S: HO2S Data
Ignition: Ignition Data
Misfire: Misfire Data
TAC: Throttle Actuator Control Data
ODD: Output driver data
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
AIR Indicated Pressure | AIR | psi/kPa | Varies |
AIR Pressure Sensor | AIR | PSI/kPa | Varies |
Air Pressure Sensor | AIR | volts | Varies |
AIR Pump Relay Circuit Status | ODD | OK/Fault | Fault |
AIR Pump Relay Command | AIR | On/Off | Off |
AIR Solenoid Circuit Status | ODD | OK/Fault | Fault |
AIR Solenoid Command | AIR | On/Off | Off |
AIR Test State | AIR | Test Disabled, Phase 1, Phase 2, Phase 3, Result Avail, Test Completed | Varies |
AIR Test Result | AIR | Test Running, Aborted, Passed, Fail-DTC Set, Fail-DTC Set, Fail-DTC Set, No Result, Error | Varies |
APP Indicated Angle | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | Percent | 0 |
APP Sensor 1 | TAC | Volts | Varies |
APP Sensor 1 | TAC | Percent | Varies |
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
APP Sensor 1 Circuit Status | TAC | OK/Fault | OK |
APP Sensor 2 | TAC | Volts | Varies |
APP Sensor 2 | TAC | Percent | Varies |
APP Sensor 2 Circuit Status | TAC | OK/Fault | OK |
BARO | AIR, Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition | kPa | 60-104 kPa |
Catalytic Converter Protection Active | Fuel trim, HO2S | Yes/No | No |
CMP Sensor | Ignition, Misfire | RPM | varies |
CMP Sensor Signal Present | Ignition | Yes/No | Yes |
Cmnd. A/F Equivalence Ratio | HO2S, Eng, Fuel Trim, AIR | -- | 1 |
Crankshaft Position Sensor A | Ignition | counts | varies |
Crankshaft Position Sensor B | ignition | counts | varies |
Cruise Control Active | TAC | Yes/No | No |
Cycles of Misfire Data | Misfire | Counts | 0-99 |
Cylinder 1 and 4 IC Circuit Status | ODD | OK/Fault/Invalid State | OK |
Cylinder 2 and 5 IC Circuit Status | ODD | OK/Fault/Invalid State | OK |
Cylinder 3 and 6 IC Circuit Status | ODD | OK/Fault/Invalid State | OK |
Cyl. 1-6 Injector Circuit Status | ODD | OK/Stuck Low (open)/Stuck High | OK |
Cyl. 1-6 Injector Circuit History | ODD | OK/Stuck Low (open)/Stuck High | OK |
Decel Fuel Cut-off | EGR, Eng, Fuel Trim, HO2S | Active/Inactive | Inactive |
Desired EGR Position | EGR, | Percent | 0 |
Desired Idle Speed | Eng, EVAP, TAC | RPM | Varies |
Distance Since DTC Cleared | Eng | Miles/Kilometers | 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 History | ODD | OK/ Fault/ Invalid State | OK |
EC Ignition Relay Circuit Status | ODD | OK/ Fault/ Invalid State | OK |
ECT Sensor | AIR, Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | °C/°F | Varies |
EGR Flow Test Count | EGR | Counts | 0-12 |
EGR Learned Minimum Position | EGR | Volts | 0.14-1.0 |
EGR Position Sensor | Eng, EGR, Misfire | Percent | Varies |
EGR Position Sensor | EGR | Volts | 0 |
EGR Position Variance | EGR | Percent | 0 |
EGR Solenoid Circuit History | ODD | OK/Fault/ Invalid State | OK |
EGR Solenoid Circuit Status | ODD | OK/Fault/ Invalid State | OK |
EGR Solenoid Command | EGR | Percent | 0 |
Engine Load | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | Percent | 0 |
Engine Oil Level Switch | Eng | OK/Low | OK |
Engine Oil Pressure Switch | Eng, Misfire | Low/OK | OK |
Engine Run Time | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, ODD, TAC | Hr: Min: Sec | Varies |
Engine Speed | AIR, Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | RPM | Varies |
Engine Speed Circuit Status | ODD | OK/Fault | OK |
EVAP Fault History | EVAP | Fault/No Fault | No Fault |
EVAP Purge Solenoid Circuit Status | ODD | OK/Fault/Invalid State | OK |
EVAP Purge Solenoid Circuit History | ODD | OK/Fault/Invalid State | OK |
EVAP Purge Solenoid Command | Eng, EVAP, Fuel Trim, HO2S | Percent | Varies |
EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Varies |
EVAP Vent Solenoid Circuit Status | ODD | OK/Fault/Invalid State | OK |
EVAP Vent Solenoid Circuit History | ODD | OK/Fault/Invalid State | OK |
Fuel Level Sensor | EVAP | 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, Fuel Trim | Percent | 0-104 |
Fuel Tank Pressure Sensor | Eng, EVAP | mm Hg/in H2O | Varies |
Fuel Tank Pressure Sensor | EVAP | Volts | Varies |
Fuel Trim Cell | Eng, EVAP, Fuel Trim | 0-4 | 0 |
Fuel Trim Learn | Eng, EVAP, Fuel Trim | Enabled/Disabled | Varies |
HO2S 1 | AIR, Eng, EVAP, Fuel Trim, HO2S | millivolts | 0-1000 and Varying |
HO2S 1 Heater | HO2S | Amps | Varies |
HO2S 1 Heater Circuit History | ODD | OK/Fault/Invalid State | OK |
HO2S 1 Heater Circuit Status | ODD | OK/ Fault | OK |
HO2S 1 Heater Command | HO2S | On/Off | On |
HO2S 1 Ready | Fuel Trim, HO2S | Yes/No | Yes |
HO2S 2 | Eng, Fuel Trim, HO2S | millivolts | 0-1000 and Varying |
HO2S 2 Heater | HO2S | Amps | Varies |
HO2S 2 Heater Circuit History | ODD | OK/Fault/Invalid State | OK |
HO2S 2 Heater Circuit Status | ODD | OK/ Fault | OK |
HO2S 2 Heater Command | HO2S | On/Off | On |
Hot Open Loop | Fuel Trim, HO2S | Active/Inactive | Inactive |
IAT Sensor | AIR, Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | °C/°F | Varies |
Ignition 1 Signal | AIR, Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition, Misfire, ODD | Volts | Varies |
Ignition Off Time | Eng, EVAP | Minutes | Varies |
Ignition Mode | Ignition | IC/Bypass | IC |
Injector PWM | Eng, Fuel Trim, HO2S, Misfire | milliseconds | Varies |
Knock Retard | EGR, Ignition | Degrees | 0 |
KS Active Counter | Ignition | Yes/No | No |
Long Term FT | AIR, Eng, EVAP, Fuel Trim, HO2S | Percent | -10% to +10% |
Loop Status | AIR, Eng, EVAP, Fuel Trim, HO2S | Open/Closed | Closed |
MAF Sensor | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | g/s | 3-6 (Varies with altitude) |
MAF Sensor | Eng | Hz | 1,200-3,000 (depends on altitude) |
MAP Sensor | AIR, Eng | Volts | 0.4-2.0 Volts |
MAP Sensor | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | kPa | 20-48 kPa (Varies with altitude) |
MIL Command | Eng | On/Off | Off |
MIL Circuit Status | ODD | OK/Fault/Invalid State | OK |
MIL Circuit History | ODD | OK/Fault/Invalid State | OK |
Misfire Current Cyl. 1-6 | Misfire | Counts | 0-4 |
Misfire History Cyl. 1-6 | Misfire | Counts | 0 |
Power Enrichment | Eng, Fuel Trim, HO2S, Misfire | Active/Inactive | Inactive |
Short Term FT | AIR, Eng, EVAP, Fuel Trim, HO2S | Percent | -10 to +10 |
Spark | Eng, Fuel Trim, HO2S, Ignition, Misfire | Degrees | 22 (varies) |
Starter Relay Circuit Status | ODD | OK/ Fault | OK |
Starter Relay Circuit History | ODD | OK/ Fault | OK |
Start Up ECT | AIR, EVAP, HO2S | °C/°F | Varies |
Start Up IAT | AIR, EVAP, HO2S | °C/°F | Varies |
Stop Lamp Pedal Switch | TAC | Applied/Released | Released |
TAC/PCM Communications Signal | TAC | OK/ Fault | OK |
TAC Stop Lamp Pedal Switch | TAC | Applied/Released | Released |
TAC Vehicle Speed Signal | TAC | OK/Not OK | OK |
Total Misfire | Misfire | counts | Varies |
TP Desired Angle | TAC | Percent | Varies |
TP Indicated Angle | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | Percent | Varies |
TP Sensor 1 | TAC | Volts | Varies |
TP Sensor 1 | TAC | Percent | Varies |
TP Sensor 1 and 2 | TAC | Agree/ Disagree | Agree |
TP Sensor 1 Circuit Status | TAC | OK/Fault/Invalid State | OK |
TP Sensor 2 | TAC | Volts | Varies |
TP Sensor 2 | TAC | Percent | Varies |
TP Sensor 2 Circuit Status | TAC | OK/Fault/Invalid State | OK |
Traction Control Status (If Equipped) | TAC | Active/Inactive | Inactive |
TWC Temperature Calculated | Fuel Trim, Misfire | Degrees | Varies |
Vehicle Speed Circuit History | ODD | OK/Fault | OK |
Vehicle Speed Circuit Status | ODD | OK/Fault | OK |
Vehicle Speed Sensor | AIR, EGR, Eng, EVAP, Fuel Trim, HO2S, Ignition, Misfire, TAC | mph/ km/h | 0 |
Warm-ups Since DTC Cleared | Eng | Counts | Varies |
Warm-ups w/o Emission Faults | Eng | 0-9 | 0 |
Warm-ups w/o Non-Emission Faults | Eng | 0-9 | 0 |
