GM Service Manual Online
For 1990-2009 cars only

Use the Scan Tool Data List under the following conditions:

    • The Diagnostic System Check - Vehicle 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

1-2 Shift Time

F0, F2

Seconds

Varies

2-3 Shift Time

F0, F2

Seconds

Varies

3-4 Shift Time

F0, F2

Seconds

Varies

4-5 Shift Time

F0, F2

Seconds

Varies

5-6 Shift Time

F0, F2

Seconds

Varies

Brake Switch

F0, F1, F2

Applied/Released

Released

Calc. Throttle Position

F0, F1, F2

%

0%

Commanded Gear

F0, F1, F2, F3

1, 2, 3, 4 or 1, 2, 3, 4, 5 or Park/Neutral, Reverse, 1, 2, 3, 4, 5

1 (First)

Driver Shift Control

F0

Active/Inactive

Inactive

Driver Shift Request

F0

Upshift/ Downshift/ None/ Invalid

None

ECT

F0, F1, F2

°C (°F)

Varies

Engine Speed

F0, F1, F2

RPM

Varies

Engine Torque

F0, F1, F2

N·m (lb ft)

Varies

Gear Ratio

F0, F1, F2, F3

Ratio

Varies

High Side Driver 2

F1, F2, F3

Enabled/Disabled

Enabled

High Side Driver 2 CKT Status

F1, F2, F3

OK, Open/Short to Volts, Short to GND, Indeterminate

OK

Ignition Voltage

F0, F2, F3

Volts

12-14

IMS

F0, F2

Park-Drive 1, Open, Invalid

Park

IMS A/B/C/P

F0, F2

HI/LOW

L-H-H-L

ISS/OSS Supply Voltage

F0, F1, F2

OK, Out of Range

OK

Last Shift Time

F0, F2

Seconds

Varies

Line PC Sol. CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

PC Sol. 2 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

PC Sol. 2 Pressure Comm

F0, F3

Yes/No

No

PC Sol. 3 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

PC Sol. 3 Pressure Comm

F0, F3

Yes/No

Yes

PC Sol. 4 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

PC Sol. 4 Pressure Comm

F0, F3

Yes/No

No

PC Sol. 5 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

PC Sol. 5 Pressure Comm

F0, F3

Yes/No

No

Shift Sol. 1 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

Shift Solenoid 1

F0, F2, F3

On/Off

On

Shift Sol. 2 CKT Status

F3

OK, Open/Short to GND, Short to Volts, Indeterminate

OK

Shift Solenoid 2

F0, F2, F3

On/Off

On

TCC PC Sol. Pressure Comm

F0, F1, F3

Yes/No

No

TCC Slip Speed

F0, F1, F2

RPM

Varies

TCM Temperature

F0, F1, F2

°C (°F)

Varies

TFP Switch 1

F0

HI/LOW

LOW

TFP Switch 3

F0

HI/LOW

HI

TFP Switch 4

F0

HI/LOW

HI

TFP Switch 5

F0

HI/LOW

HI

Trans. Fluid Temp.

F0, F1, F2

°C (°F)

Varies

Transmission ISS

F0, F1, F2

RPM

Engine RPM

Transmission OSS

F0, F1, F2

RPM

0 RPM

*Data List Legend

    • F0: Transmission Data
    • F1: TCC Data
    • F2: Shift Data
    • F3: Solenoid Data