GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data list under the following conditions:

    • The Diagnostic System Check is complete.
    • The on-board diagnostics are functioning properly.
    • No diagnostic trouble codes (DTCs) are present.

The values below represent a typical display recorded from a properly functioning system.

Important: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values below were recorded under the following conditions:

    • Engine at Idle
    • Upper radiator hose hot
    • Closed throttle
    • Transmission in PARK
    • Closed Loop operation
    • Accessories OFF
    • Brake pedal not applied

Scan Tool Parameter

Data List*

Units Displayed

Typical Data Value

ABS System Disable

F7

Yes/No

No

AWD Circuit Status

F7

OK/Short/Open

OK

AWD Clutch Temp. Disable

F7

Yes/No

No

AWD Disable

F7

Yes/No

No

AWD Duty Cycle

F7

Percent

Varies

AWD Fluid Temp. Disable

F7

Yes/No

No

AWD Minispare Disable

F7

Yes/No

No

AWD Overtemp. Delay

F7

Yes/No

No

AWD Torque Management

F7

Active/Inactive

Inactive

AWD Voltage Disable

F7

Yes/No

No

AWD Wheel Speed Disable

F7

Yes/No

No

Calc. Throttle Position

F0, F1, F2, F3, F4, F5, F7

Percent

Varies

Commanded Gear

F0, F1, F2, F3, F4, F5, F7

1,2,3,4

1

ECT

F0, F1, F7

°C (°F)

Varies

Engine Speed

F0, F1, F2, F3, F4, F5, F7

RPM

650-750 RPM

Engine Torque

F0, F1, F7

N·m (lb ft)

Varies

Gear Ratio

F0, F1, F2, F3, F4, F7

Ratio

3.98

Ignition Voltage

F0, F7

Volts

12.5-13.5 Volts

IMS

F0, F7

Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Drive 2/Drive 1, Drive 1, Invalid, Open

Park

IMS A/B/C/P

F0, F7

HI/LOW

LOW/HI/HI/LOW

Last Disable Odometer

F7

km (miles)

Varies

Last Disable Reason

F7

Fluid Temp, Clutch Temp, Wheel Speed, Voltage, Mini Spare, ABS System, Output Controls

Varies

TP Angle

F0, F1, F2, F3, F4, F5, F7

Percent

0%

Trans. Fluid Temp.

F0, F1, F5, F7

°C (°F)

Varies

Transmission ISS

F0, F1, F2, F3, F4, F7

RPM

600-700 RPM

Transmission OSS

F0, F1, F2, F3, F4, F7

RPM

0 RPM

Vehicle Speed

F0, F1, F2, F3, F4, F7

km/h (mph)

0 km/h

*Data List Legend

    • F0: Transmission Data
    • F1: TCC Data
    • F2: 1-2 Shift Data
    • F3: 2-3 Shift Data
    • F4: 3-4 Shift Data
    • F5: PC Solenoid Data
    • F6: Transmission Adapts
    • F7: All-Wheel Drive Data