GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data list under the following conditions:

    • The Powertrain On-Board Diagnostic (OBD) System Check is complete
    • The On-Board Diagnostics are functioning properly
    • No 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

Transmission Scan Tool Data List

Scan Tool Parameter

Data List*

Units

Typical Data Values

1-2 Shift Error

F2,F6

Seconds

Varies

1-2 Shift Time

F0,F2,F6

Seconds

Varies

1-2 Sol.

F0,F2,F3,F4

On/Off

On

1-2 Sol. Open/Short to GND

F2

Yes/No

No

1-2 Sol. Short to Volts

F2

Yes/No

No

1-2 TAP Cell (4-16)

F6

kPa/Psi

Varies

2-3 Shift Error

F3,F7

Seconds

Varies

2-3 Shift Time

F0,F3,F7

Seconds

Varies

2-3 Sol.

F0,F2,F3,F4

On/Off

Off

2-3 Sol. Open/Short to GND

F3

Yes/No

No

2-3 Sol. Shorted to Volts

F3

Yes/No

No

2-3 TAP Cell (4-16)

F7

kPa/Psi

Varies

3-4 Shift Error

F4

Seconds

Varies

3-4 Shift Time

F0,F4

Seconds

Varies

4WD

F0

Enabled/Disabled

Disabled

4WD Low

F0

Enabled/Disabled

Disabled

A/C Clutch

F0

On/Off

Off

Cruise

F0

Enabled/Disabled

Disabled

Current Gear

F0,F1,F2,F3,F4,F5

1,2,3,4

1

Current TAP Cell

F6,F7

0-16

Varies

ECT

F0,F1

°C (°F)

Varies

Engine Run Time

F0

Hr:Min:Sec

Varies

Engine Speed

F0,F1,F2,F3,F4,F5

RPM

600-800

Engine Torque

F0,F1

N·m (lb ft)

10

Gear Ratio

F0,F2,F3,F4

Ratio

3.98:1

Ignition Voltage

F0

Volts

13.5-14.5

P1870 Slip Counter

F0,F1

Counts

Varies

Last Shift Time

F0

Seconds

Varies

PC Sol. Actual Current

F0,F5

Amps

0.92 amps

PC Sol. Duty Cycle

F0,F5

Percent On Time

Varies

PC Sol. Ref. Current

F0,F5

Amps

0.92 amps

Power Take Off

F0,F1

On/Off

Off

Speed Ratio

F0,F1,F2,F3,F4

Ratio

8.00:1

TCC Brake Switch

F0,F1

Open/Closed

Closed

TCC Duty Cycle

F0,F1

Percent

0%

TCC Duty Cycle Open Short to GND

F1

Yes/No

No

TCC Duty Cycle Short to Volts

F1

Yes/No

No

TCC Slip Speed

F0,F1

RPM

+/- 150

TFP Sw.

F0

Park/Neutral, Reverse, Drive4, Drive3, Drive2, Drive1 or Invalid

Park/Neutral

TFP Sw. A/B/C

F0

HI/LOW

HI/LOW/HI

TFT Sensor

F0,F1,F5

Volts

Varies

Tow/Haul Mode

F0

Active/Inactive

Inactive

TP Angle

(Vehicles w/o Traction Control)

F0,F1,F2,F3,F4,F5

Percent

0%

TP Indicated Angle

(Vehicles with Traction Control)

F0,F1,F2,F3,F4,F5

Percent

0-10%

TP Sensor

(Vehicles w/o Traction Control)

F0,F1,F2,F3,F4

Volts

0.3-0.9 V

Traction Control

(6.0 L only)

F0

Active/Inactive

Inactive

TR Sw.

F0

Park, Reverse, Neutral, Drive4, Drive3, Drive2, Drive1, Invalid

Park

TR Sw. A/B/C/P

F0

HI/LOW

LOW/HI/HI/LOW

Transfer Case Ratio

F0,F2,F3,F4

Ratio

3.22:1

Trans. Fluid Temp.

F0,F1,F5

°C (°F)

Varies

Transmission Hot Mode

F0,F1

On/Off

Off

Transmission ISS

F0,F1,F2,F3,F4

RPM

600-800

Transmission OSS

F0,F1,F2,F3,F4

RPM

0

Turbine Speed

F0,F1,F2,F3,F4

RPM

600-800

Vehicle Speed

F0,F1,F2,F3,F4

km/h (mph)

0

*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: 1-2 Adapt Data
    • F7: 2-3 Adapt Data