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 Engine Controls Diagnostic Check is completed.

• | No diagnostic trouble codes (DTCs)

• | 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 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.
Eng 1: Engine Data 1 List
Eng 2: Engine Data 2 List
EE: Enhanced Evaporative Emission (EVAP) Data
FF/FR: Freeze Frame/Failure Records
FT: Fuel Trim Data List
MF: Misfire Data List
TAC: Throttle Actuator Control (TAC) Data

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
APP Average | TAC | Counts | Varies
APP Indicated Angle | Eng 1, Eng 2, EE, EGR, FT, TAC, CC | 0-100% | 0%
APP Sensor 1 | TAC | 0-100% | 0%
APP Sensor 1 | TAC | 0-5 V | 0.4-0.9 V
APP Sensor 2 | TAC | 0-100% | 0%
APP Sensor 2 | TAC | 5-0 V | 4.5-4.1 V
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree
APP Sensor 1 and 3 | TAC | Agree/Disagree | Agree
APP Sensor 2 and 3 | TAC | Agree/Disagree | Agree
APP Sensor 3 | TAC | 0-100% | 0%
APP Sensor 3 | TAC | 5-0 V | 4.2-3.7 V
Auxiliary Fan Request-if equipped | Eng 2 | ON/OFF | OFF
BARO | Eng 1, EE, FT | kPa | 65-104 kPa varies w/altitude
CMP Sensor-High to Low | Eng 2 | Counts | Varies
CMP Sensor-Low to High | Eng 2 | Counts | Varies
Cold Startup | Eng 2, EE | Yes/No | Varies
Coolant Level Switch | Eng 2 | OK/Low | OK
Cruise Control Active | Eng 1, TAC, CC | Yes/No | No
Cruise Disengage 1-8 History | CC | Applied/Released | Varies
Cruise On/Off Switch | TAC, CC | ON/OFF | OFF
Cruise Release Brake Pedal Switch | CC | Applied/Released | Released
Cruise Resume/Accel Switch | TAC, CC | ON/OFF | OFF
Cruise Set/Coast Switch | TAC, CC | ON/OFF | OFF
Current Gear-4 speed only | Eng 1, Eng 2, FT | 0-4 | 1
Cycles of Misfire Data | MF | 0-100 Counts | Varies
Desired Idle Speed | Eng 1, Eng 2, TAC, EE, FF/FR | RPM | PCM Controlled
DTC Set This Ignition | Eng 1, Eng 2, EE, FT, CC | Yes/No | No
ECT Sensor | Eng 1, Eng 2, EE, FT, MF | -39 to +140°C (-38 to +284°F) | 88-105°C (190-221°F)
Engine Load | All | 0-100% | 1-4% @ Idle 7-10% @ 2,500 RPM
Engine Oil Level Switch-if equipped | Eng 2 | OK/Low | OK
Engine Oil Life Remaining | Eng 2 | 0-100% | Varies
Engine Run Time | All | Hrs, Min, Sec | Varies
Engine Speed | All | 0-10,000 RPM | 500-700 RPM
EVAP Purge Solenoid Command | Eng 1, EE, FT | 0-100% | 0-25%
EVAP Test Result | EE | Passed/Failed/No Result | Varies
EVAP Vent Solenoid Command-if equipped | Eng 1, EE, FT | Not Venting/Venting | Venting
Fuel Level Sensor | EE | 0-5 V | 0.7-2.5 V
Fuel Level Sensor Rear Tank-if equipped | EE, Eng 1 | 0-5 V | 0.7-2.5 V
Fuel Tank Level Remaining | EE | Gal/L | Varies
Fuel Tank Level Remaining | EE | 0-100% | Varies
Fuel Tank Pressure (FTP) Sensor-if equipped | Eng 1, EE | -32.7 to +13.96 mm/Hg (-17.4 to +7.5 in/H2O) | Varies
FTP Sensor-if equipped | EE | 0-5 V | Varies
Fuel Tank Rated Capacity | EE | 98 L (25.9 Gal) or 128 L (34 Gal) | Varies with fuel tank option
Fuel Trim Cell | Eng 1, EE, FT | 0-23 | 16, 20
Fuel Trim Learn | Eng 1, EE, FT | Enabled/Disabled | Enabled-may toggle
Generator F Terminal Signal | Eng 2 | % | Varies
Generator L Terminal Signal Command | Eng 2 | ON/OFF | ON
HO2S Bank 1 Sensor 1 | Eng 1, EE, FT | mV | 10-1,000 mV and Varying
HO2S Bank 1 Sensor 2-if equipped | Eng 1, EE, FT | mV | 10-1,000 mV and Varying
HO2S Bank 2 Sensor 1 | Eng 1, EE, FT | mV | 10-1,000 mV and Varying
HO2S Bank 2 Sensor 2-if equipped | Eng 1, EE, FT | mV | 10-1,000 mV and Varying
IAT Sensor | Eng 1, Eng 2, EE, FT | -39 to +140°C (-38 to +284°F) | Depends on ambient temperature
Ignition 1 Signal | Eng 1, Eng 2, EE, FT, TAC | 0-25.5 V | 11.5-14.5 V
Inj. PWM Bank 1 Average | Eng 2, FT, MF | ms | 2-6 ms
Inj. PWM Bank 2 Average | Eng 2, FT, MF | ms | 2-6 ms
Knock Retard | Eng 1 | 0-16° | 0°
Long Term FT Avg. Bn1 | FT | % | Near 0%
Long Term FT Avg. Bn2 | FT | % | Near 0%
Long Term FT Bank 1 | Eng 1, Eng 2, EE, FT | % | Near 0%
Long Term FT Bank 2 | Eng 1, Eng 2, EE, FT | % | Near 0%
Loop Status | Eng 1, Eng 2, EE, FT | Open/Closed | Closed
Low Oil Lamp Command-if equipped | Eng 2 | ON/OFF | OFF
MAF Sensor | Eng 1, Eng 2, FT, MF, EE, TAC | 0-665 g/s | 1-9 g/s @ Idle-depends on altitude 15-26 g/s @ 2,500 RPM-depends on altitude
MAF Sensor | Eng 2 | 0-31,999 Hz | 2,000-3,000 Hz
MAP Sensor | Eng 1, Eng 2, FT, MF, EE, TAC | 10-105 kPa | 20-48 kPa
MAP Sensor | Eng 1, Eng 2 | 0-5 V | 1.0-2.0 V Varies with altitude
MIL Command | Eng 2 | ON/OFF | OFF
Mileage Since DTC Cleared | Eng 2 | Miles/Km | Varies
Misfire Current Cyl. 1-8 | MF | 0-255 Counts | 0
Misfire History Cyl. 1-8 | MF | 0-65,535 Counts | 0
PCM Reset | Eng 1, Eng 2, EE, FT | Yes/No | No
PCM/VCM in VTD Fail Enable-if equipped | Eng 1 | Yes/No | No
PNP Switch-5 speed only | Eng 2, FT | Park/Neutral/In gear | Varies
Power Enrichment | Eng 2 | Yes/No | No
PTO Enable-if equipped | TAC | Yes/No | No
Reduced Engine Power | Eng 1, TAC, CC | Active/Inactive | Inactive
Short Term FT Avg. Bn1 | FT | % | Near 0%
Short Term FT Avg. Bn2 | FT | % | Near 0%
Short Term FT Bank 1 | Eng 1, Eng 2, EE, FT | % | Near 0%
Short Term FT Bank 2 | Eng 1, Eng 2, EE, FT | % | Near 0%
Spark | Eng 1, Eng 2, FT, MF | Degrees | 15-20°
Start Up ECT | Eng 2, EE, FT | °C/°F | Varies
Stop Lamp Pedal Switch | Eng 2, TAC, CC | Applied/Released | Released
TAC/PCM Communication Signal | Eng 1, TAC, CC | OK/Fault | OK
TCC Brake Pedal Switch | Eng 1, Eng 2 | Applied/Released | Released
TCC Enable Solenoid Command-4L80E only | Eng 1, Eng 2, MF, FF/FR | ON/OFF | OFF
TCC PWM Solenoid Command-4L80E only | Eng 2 | ON/OFF | OFF
TFP Sw-4L80E only | Eng 2, FT | Transmission Gear Position | Varies
TP Desired Angle | Eng 1, Eng 2, EE, TAC, CC | 0-100% | 3-4.5%
TP Indicated Angle | All | 0-100% | 3-7%
TP Sensor 1 | TAC | 0-100% | 3%
TP Sensor 1 | TAC | 0-5 V | 0.4-0.9 V
TP Sensor 2 | TAC | 0-100% | 3%
TP Sensor 2 | TAC | 5-0 V | 4.8-4.3 V
TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree
TR Switch (4L80E only) | Eng 2, FT | Transmission Gear Position | Park
Vehicle Speed Sensor | All | km/h mph | 0
VTD Auto Learn Timer (if equipped) | Eng 1 | Active/Inactive | Inactive
VTD Fuel Disable (if equipped) | Eng 1 | Active/Inactive | Inactive
VTD Fuel Disable Until Ign. Off (if equipped) | Eng 1 | Yes/No | No
Warm-Ups w/o Emission Faults | Eng 2 | 0-255 Counts | Varies
Warm-Ups w/o Non-Emission Faults | Eng 2 | 0-255 Counts | Varies