For 1990-2009 cars

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:

All: The Parameter is in all of the data lists indicated below.
ED: Engine Data
EVAP: EVAP Data
FT: Fuel Trim Data List
HO2S: Heated Oxygen Sensor Data
ID: Ignition Data
MF: Misfire Data List
TAC: Throttle Actuated Control Data List
CC: Cruise Control Data List

Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values
--- | --- | --- | ---
Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off
A/C Relay Command | ED, MF | On/Off | Off
A/C Request Signal | ED | Yes/No | No
Air Fuel Ratio | ED, FT | Ratio | 14.7:1
APP Average | TAC | Counts | Counts
APP Indicated Angle | ED, ID, FT, TAC, CC, EVAP | 0-96% | 0%
APP Sensor 1 | TAC | %/Volts | 0%/1.02 Volts
APP Sensor 1 Circuit Status | TAC | OK | OK
APP Sensor 2 | TAC | %/Volts | 0%/4.04 Volts
APP Sensor 2 Circuit Status | TAC | OK | OK
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree
BARO | ED, EVAP, ID, EE, FT | kPa | 65-104 kPa/Varies w/Altitude
Cam Phase Angle Actual | ED | Degrees | 0°
Cam Phase Angle Desired | ED | Degrees | 0°
Cam Phase Angle Variance | ED | Degrees | 0°
Camshaft Phase Solenoid | ED | % | Varies
Catalytic Converter Projection Active | FT, HO2S | Yes/No | No
CKP Active Counter | ED | 1-250 | 9-250
CMP Active Counter | ED, ID | Counts | Varies
CMP Sensor | ED, ID | RPM | Varies
Cold Start-Up | ED, EVAP | Yes/No | Varies
Crank Request Signal | ED | Yes/No | No
Cruise Control Active | ED, TAC, CC | 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 | TAC, CC | On/Off | Off
Cruise Release Clutch/TCC Pedal Switches | ED, TAC, CC | Engaged/Released | Released
Cruise Resume/Accel Switch | TAC, CC | On/Off | Off
Cruise Set/Coast Switch | TAC, CC | On/Off | Off
Cycles of Misfire Data | MF | 0-100 Counts | Varies
Decel Fuel Cutoff | ED, FT, HO2S | Active/Inactive | Inactive
Desired Idle Speed | ED, EE, TAC | RPM | PCM Controlled
EC Ignition Relay Feedback | ED, EVAP | Volts | B+
ECT Sensor | ED, EVAP, FT, ID, MF | -40 to +151°C (-40 to +303°F) | 88-105°C (190-221°F) Depends on ambient temperature
Engine Load | ED, FT, MF, TAC, CC, ID, EVAP | 0-100% | 23-24% @ Idle 7-42% @ 2,500 RPM
Engine OFF Time | EVAP | Time | Varies
Engine Oil Level Switch | ED | OK/Low | OK
Engine Oil Pressure Switch | ED | OK/Low | OK
Engine Run Time | All | Hrs, Min, Sec | Varies
Engine Speed | All | 0-10,000 RPM | 500-700 RPM
Engine Torque | TAC | N·m/lb ft | 16-24 N·m/11-17 lb ft
EVAP Fault History | EVAP | Fault/No Fault | No Fault
EVAP Purge Solenoid Command | ED, EVAP | 0-100% | 10-30%
EVAP Test Abort Reason | EVAP | -- | Lost Enable
EVAP Test Result | EVAP | -- | No Result
EVAP Test State | EVAP | -- | Test Complete
EVAP Vent Solenoid Command | ED, EVAP | Not Venting/Venting | Venting
Fuel Tank Pressure Sensor | ED | mm/Hg/In H2O | Varies
Fuel Tank Pressure Sensor | EVAP | mm/Hg/In H2O/Volts | Varies
Fuel Tank Pressure Sensor | EVAP | mm/Hg/in H20 | --
Fuel Trim Cell | ED, EVAP, FT | 0-23 | 16, 17, 21
Fuel Level Sensor | ED, EVAP | 0-100 % | Varies
Fuel Pump Relay Command | ED | On/Off | On
Fuel Tank Level Remaining | ED, EVAP | % | Varies
Fuel Trim Learn | ED, FT | Enable/Disable | Enable
Generator F-Terminal Signal | ED | Percent | Varies
Generator L-Terminal Signal Command | ED | ON/OFF | OFF
HO2S 1 | ED, EVAP, FT | mV | 10-1,000 mV and Varying
HO2S 2 | ED, FT | mV | 10-1,000 mV and Varying
HO2S 1 Heater | HO2S | AMP | Varies
HO2S 1 Heater Current | FT | Amps | Varies
HO2S 2 Heater | HO2S | AMP | Varies
HO2S 2 Heater Current | FT | Amps | Varies
IAT Sensor | ED, EVAP, ID, FT | -40 to +151°C (-40 to +303°F) | Depends on ambient temperature
Ignition 1 Signal | ED, EVAP, FT, ID, TAC, CC | 0-25 volts | 11.5-14.5 Volts
Initial Brake Apply Signal | ED | Applied/Released | Released
Injector PWM | ED, FT, MF | Milliseconds | 2-6 ms
Knock Retard | ED, ID | 0-16° | 0°
Long Term FT | ED, EVAP, FT | % | Near 0%
Long Term FT Avg | FT | % | Varies
Loop Status | ED, EVAP, FT | Open/Closed | Closed
MAF Sensor | ED, EVAP, FT, ID, MF, TAC | g/s | Varies
MAF Sensor | EVAP, FT | Hz | Varies
MAP Sensor | ED, EVAP, FT, ID, TAC, MF | kPa | 20-48 kPa
Medium Resolution Resync Counter | ED, ID | Counts | 0
Mileage Since DTC Cleared | ED | Miles | Varies
MIL Command | ED, ID | Off/On | Off
MIL Command Requested By DTC | ED, ID | 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
Non-driven Wheel Speed | CC | MPH | Varies
PCM reset | ED, EVAP, ID | Yes/No | No
Power Enrichment | ED, FT, MF | Active/Inactive | Inactive
Reduced Engine Power | ED, TAC, CC | Active/Inactive | Inactive
Reference Voltage 1 Signal | TAC, ID | Volts | 5.03 V
Reference Voltage 2 Signal | TAC, ID | Volts | 5.03 V
Short Term FT | ED, EVAP, FT | % | Near 0%
Short Term FT Avg | FT | % | Varies
Spark | ED, FT, ID, MF | Degrees | 11-20°
Start Up ECT | ED, FT | °C/°F | Varies
Stop Lamp Pedal Switch | CC | Applied/Released | Released
Starter Relay Command | ED | On/Off | Off
Start-up IAT | EVAP, FT, HO2S | Degrees | Varies
TCC Enable Solenoid Command | ED, MF, CC | ON/OFF | OFF
Torque Delivered Signal | TAC | ft. lbs. | --
Torque Request Signal | TAC | ft. lbs. | --
Total Misfire Count | ED, MF | Numeric | 0
TP Desired Angle | ED, EVAP, TAC, CC | % | 4.2%
TP Indicated Angle | ED, EVAP, FT, ID, TAC, MF, CC | % | 4.2%
TP Sensor 1 Learn Minimum | TAC | Volts | --
TP Sensor 2 Learn Minimum | TAC | Volts | --
TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree
TP Sensor 1 | TAC | 0-100% | 4%
TP Sensor 2 | TAC | 0-100% | 4%
TP Sensor 1 | TAC | 0-5 Volts | 4.24 Volts
TP Sensor 2 | TAC | 0-5 Volts | 0.78 Volt
Traction Control Signal | TAC, CC | Active/Inactive | Inactive
Traction Control Signal | CC | Active/Inactive | Inactive
TWC Temperature Calculated | FT | C/F | 350°C
VCM/PCM in VTD Fail Enable | ED | Yes/No | No
Vehicle Speed Sensor | All | km/h mph | 0
VTD Fuel Disable | ED | Active/Inactive | Inactive
VTD Password | ED | Fault/OK | OK
VTD Auto. Learn Timer | ED | Active/Inactive | Inactive
VTD Fuel Disable Until Ignition Off | ED | Yes/No | No
Warm-up W/O Non-Emission Faults | ED | Numeric | Varies
Warm-up W/O Emission Faults | ED | Numeric | Varies