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 - Engine Controls is completed. |
| • | No DTCs |
| • | On-board diagnostics (OBDs) are functioning properly. |
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 normal running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool problem 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:
AIR: Secondary Air Injection Reaction DataAll: The Parameter is in all of the data lists indicated below.
CC: Cruise Control Data
CMP: Camshaft Position Data
COOL: Cooling/HVAC Data
ED: Engine Data
ET: Electrical/Theft Data
EVAP: EVAP Data
FT: Fuel Trim Data
HO2S: Heated Oxygen Sensor Data
ID: Ignition Data
IM: IM Data
IPC: IPC Data
MF: Misfire Data
TAC: Throttle Actuated Control Data
Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values |
|---|---|---|---|
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off | |||
5-Volt Reference 1 | AIR, EVAP, COOL, ID, IND, TAC | Volts | 5 Volts |
5-Volt Reference 2 | AIR, EVAP, COOL, ID, IND, TAC | Volts | 5 Volts |
5-Volt Reference 1 Circuit Status | AIR, EVAP, COOL, ID, IND, TAC | Fault/OK | OK |
5-Volt Reference 2 Circuit Status | AIR, EVAP, COOL, ID, IND, TAC | Fault/OK | OK |
A/C High Side Pressure | COOL | Volts | 1.33 Volts |
A/C High Side Pressure | COOL | psi | 109 psi |
A/C Off for WOT | COOL | Yes/No | No |
A/C Pressure Disable | COOL | Yes/No | No |
A/C Relay Circuit Status | COOL | Closed/Incomplete | Incomplete |
A/C Relay Command | Air, COOL, ED, IND, MF, TAC | On/Off | Off |
A/C Request Signal | COOL | Yes/No | No |
Air Fuel Ratio | AIR, ED, FT, HO2S, IND | Ratio | 14.7:1 |
Air Indicated Pressure | AIR | kPa/psi | 0 kPa/0 psi |
Air Pressure Sensor | AIR | kPa/psi | 96 kPa/13 psi |
Air Pressure Sensor | AIR | Volts | 2.59 Volts |
Air Pressure Sensor Variance | AIR | kPa/psi | 0 kPa/0 psi |
Air Pump Relay Circuit | AIR | OK/Indeterminate | OK |
Air Pump Relay Command | AIR | On/Off | Off |
Air Solenoid Circuit Status | AIR | OK/Indeterminate | Indeterminate |
Air Solenoid Command | AIR | On/Off | Off |
Ambient Air Temperature | ED | Degrees | 23°C (73°F) |
APP Indicated Angle | AIR, CC, CMP, ED, ET, EVAP, FT, HO2S, ID, IND, MF, TAC | 0-96% | 0% |
APP Sensor 1 | TAC | %/Volts | 0%/0.96 Volts |
APP Sensor 2 | TAC | %/Volts | 0%/4.51 Volts |
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
APP Sensors | TAC | % | 0% |
APP Sensor 1 Indicated Position | TAC | % | 0% |
APP Sensor 2 Indicated Position | TAC | % | 0% |
BARO | ED, EVAP, ID, EE, FT, IM, IND, AIR, HO2S | kPa | 65-104 kPa/Varies w/Altitude |
Calc. TWC Temp. | FT, MF | Degrees | 531°C (982°F) |
Catalytic Converter Projection Active | FT, HO2S | Yes/No | No |
CKP Active Counter | ID | Counts | 11-241 |
CKP Sensor | ID | RPM | 599-619 RPM |
CMP Active Counter | CMP, ID | Counts | Varies |
CMP Command | CMP | % | 0% |
CMP Sensor | CMP, ED, ID, MF | RPM | Varies |
Cold Start-Up | AIR, ED, EVAP, IM | Yes/No | Yes |
Crank Request Signal | ET | Yes/No | No |
Cruise Control Active | ED | Active/Inactive | Inactive |
Cruise Control Active | CC, TAC, IPC | Yes/No | No |
Cruise Disengage 1 History | CC | Varies | Varies |
Cruise Disengage 2 History | CC | Varies | Varies |
Cruise Disengage 3 History | CC | Varies | Varies |
Cruise Disengage 4 History | CC | Varies | Varies |
Cruise Disengage 5 History | CC | Varies | Varies |
Cruise Disengage 6 History | CC | Varies | Varies |
Cruise Disengage 7 History | CC | Varies | Varies |
Cruise Disengage 8 History | CC | Varies | Varies |
Cruise On/Off Switch | CC | On/Off | Off |
Cruise Resume/Accel Switch | CC | Active/Inactive | Inactive |
Cruise Set/Coast Switch | CC | Active/Inactive | Inactive |
Cycles of Misfire Data | MF | Counts | Varies |
Decel Fuel Cutoff | ED, FT, HO2S | Active/Inactive | Inactive |
Desired Exh. CMP | CMP | Degrees | 0 Degrees |
Desired Idle Speed | CMP, EVAP, TAC | RPM | 600 RPM |
EC Ignition Relay Feedback Signal | ED, ET, EVAP, TAC | Volts | B+ |
ECT Sensor | ALL | -40 to +151°C (-40 to +303°F) | 88-105°C (190-221°F) Depends on ambient temperature |
Engine Load | AIR, CMP, HO2S, IND, ED, FT, MF, TAC, ID, EVAP | 0-100% | 23-24% @ Idle 7-42% @ 2,500 RPM |
Engine OFF Time | EVAP | Time | Varies |
Engine Oil Pressure Switch | CMP, ET, ED, IPC | OK/Low | OK |
Engine Oil Temperature Calculated | COOL, CMP, IPC | Degrees | 82°C (170°F) |
Engine Run Time | All | Hrs, Min, Sec | Varies |
Engine Speed | All | RPM | 500-700 RPM |
EVAP Fault History | EVAP | Fault/No Fault | No Fault |
EVAP Purge Solenoid Circuit Status | EVAP | OK/Indeterminate | Indeterminate |
EVAP Purge Solenoid Command | ED, EVAP, FT, HO2S | % | 18% |
EVAP Vent Solenoid Circuit Status | EVAP | OK/Incomplete | Incomplete |
EVAP Vent Solenoid Command | ED, EVAP | Not Venting/Venting | Not Venting |
Exh. CMP Angle | CMP | Degrees | 0 Degrees |
Extended Travel Brake Pedal Switch | TAC | Applied/Released | Applied |
Fuel Pump Relay Circuit | ED | Fault/OK | OK |
Fuel Tank Pressure Sensor | ED | mm/Hg/In H2O | Varies |
Fuel Tank Pressure Sensor | EVAP | mm/Hg/In H2O/Volts | 1.5 Volts |
Fuel Tank Pressure Sensor | EVAP | mm/Hg/in H20 | 11.2 mm/Hg /5.9 in H2O |
Fuel Trim Cell | FT | 0-23 | 16, 17, 21 |
Fuel Level Sensor | IPC, EVAP | Volts | 2.2 Volts |
Fuel Pump Relay Command | ED | On/Off | On |
Fuel Tank Level Remaining | FT, MF, ED, EVAP, IM, IPC | % | Varies |
Fuel Trim Learn | ED, FT | Enable/Disable | Disable |
Generator F-Terminal Signal | ET | Percent | Varies |
Generator L-Terminal Signal Command | ET | ON/OFF | ON |
HO2S 1 | ED, EVAP, FT, HO2S, AIR, IND | mV | 0-725 mV and Varying |
HO2S 1 Heater | HO2S | Amps | 1.12-1.14 Amps |
HO2S 1 Heater Circuit Status | HO2S | Fault/OK | OK |
HO2S 1 Heater Command | HO2S | % | 0% |
HO2S 1 Heater Current | FT | Amps | Varies |
HO2S 2 | ED, FT, HO2S | mV | 10-1,000 mV and Varying |
HO2S 2 Heater | HO2S | Amps | Varies |
HO2S 2 Heater Circuit Status | HO2S | Fault/OK | OK |
HO2S 2 Heater Command | HO2S | % | 0% |
Hot Open Loop | FT, HO2S, COOL | Active/Inactive | Inactive |
Ignition Accessory Signal | ET, ED, IPC | On/Off | Off |
IAT Sensor | ED, EVAP, ID, FT, MF, CMP, AIR, HO2S, COOL | -40 to +151°C (-40 to +303°F) | Depends on ambient temperature |
Ignition 1 Signal | ALL | 0-25 Volts | 11.5-14.5 Volts |
Injector PWM | ED, FT, MF | Milliseconds | 2-6 ms |
Knock Retard | COOL, ID | 0-16° | 0° |
Long Term FT | AIR, HO2S, ED, EVAP, FT | % | 3-6% |
Long Term FT Avg | FT | Lambda | 1.06 |
Long Term FT Test Avg. w/o Purge | FT | Lambda | 1.02 |
Loop Status | ED, EVAP, FT, HO2S | Open/Closed | Closed |
Low EOP Indicator Command | IPC | On/Off | Off |
MAF Sensor | AIR, CMP, ED, EVAP, FT, HO2S, ID, IND, MF, TAC | g/s | Varies |
MAF Sensor | EVAP, FT, IND | Hz | Varies |
MAP Sensor | AIR, CMP, ED, EVAP, FT, ID, IND, TAC, MF | kPa | 27-78 kPa |
MAP Sensor | IND, CMP | Volts | 0.53 Volts |
Distance Since DTC Cleared | ED | Miles/Km | Varies |
MIL Command | ED, IM, IPC | Off/On | Off |
MIL Requested By DTC | AIR, CMP, ED, ET, EVAP, HO2S, ID, IND, MF, TAC | Yes/No | No |
Misfire Current Cyl #1 | MF | Varies | 0 |
Misfire Current Cyl #2 | MF | Varies | 0 |
Misfire Current Cyl #3 | MF | Varies | 0 |
Misfire Current Cyl #4 | MF | Varies | 0 |
Misfire Current Cyl #5 | MF | Varies | 0 |
Misfire History Cyl #1 | MF | Varies | 0 |
Misfire History Cyl #2 | MF | Varies | 0 |
Misfire History Cyl #3 | MF | Varies | 0 |
Misfire History Cyl #4 | MF | Varies | 0 |
Misfire History Cyl #5 | MF | Varies | 0 |
PCM/VCM in VDT Fail Enable | ET | Yes/No | Yes |
Power Enrichment | ED, FT, HO2S, MF | Active/Inactive | Inactive |
Reduced Engine Power | ED, TAC, CC | Active/Inactive | Inactive |
Short Term FT | AIR, ED, EVAP, FT | % | 0-3% |
Short Term FT Avg | FT | Lambda | 1.01-1.02 |
Spark | CC, COOL, ED, FT, HO2S, ID, IND, MF | Degrees | 11-20° |
Start Up ECT | AIR, COOL, ED, EVAP, FT, HO2S, IM | °C/°F | Varies |
Starter Relay Circuit Status | ET, IM | OK/Indeterminate | Indeterminate |
Starter Relay Command | ED | On/Off | Off |
Start-up IAT | AIR, COOL, EVAP, FT, HO2S, IM | Degrees | Varies |
TAC Forced Engine Shutdown | TAC | Yes/No | No |
TAC Motor | TAC | Enabled/Disabled | Enabled |
TCC Enable Solenoid Command | ED | ON/OFF | OFF |
Total Misfire | MF | Counts | 0 |
TP Desired Angle | TAC, CC | % | 4.2% |
TP Indicated Angle | ED, EVAP, FT, ID, HO2S, TAC, MF, CC, CMP | % | 3% |
TP Sensor 1 Learned Minimum | TAC | Volts | 0.49 Volt |
TP Sensor 2 Learned Minimum | TAC | Volts | 0.47 Volt |
TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
TP Sensor 1 Indicated Angle | TAC | 0-100% | 3% |
TP Sensor 2 | TAC | 0-100% | 3% |
TP Sensor 1 | TAC | 0-5 Volts | 4.37 Volts |
TP Sensor 2 | TAC | 0-5 Volts | 0.59 Volt |
Traction Control Status | CC, TAC | Active/Inactive | Inactive |
Vehicle Speed Sensor | All | km/h mph | 0 |
VTD Fuel Disable | ED, ET | Active/Inactive | Inactive |
VTD Auto. Learn Timer | ED, ET | Active/Inactive | Inactive |
VTD Fuel Disable Until Ignition Off | ED, ET | Yes/No | No |
Warm-up W/O Non-Emission Faults | ED | Numeric | Varies |
Warm-up W/O Emission Faults | ED | Numeric | Varies |
Wide Open Throttle | TAC | Yes/No | No |
