GM Service Manual Online
For 1990-2009 cars only

Scan Tool Data List 4.2L

Use the scan tool data list under the following conditions:

    • The Diagnostic System Check - Vehicle in Vehicle DTC Information 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 Displayed

Typical Data Value

1-2 Shift Error

F2, F7/F0

Seconds

Varies

1-2 Shift Time

F0, F2, F7/F0

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 4-14

F7/F0

kPa/Psi

Varies

2-3 Shift Error

F3, F7/F1

Seconds

Varies

2-3 Shift Time

F0, F3, F7/F1

Seconds

Varies

2-3 Sol.

F0, F2, F3, F4

On/Off

On

2-3 Sol. Open/Short to GND

F3

Yes/No

No

2-3 Sol. Short to Volts

F3

Yes/No

No

2-3 TAP Cell 4-14

F7/F1

kPa/Psi

Varies

3-2 Downshift Sol.

F0, F5

On/Off

On

3-2 Sol. Open/Short to GND

F5

Yes/No

No

3-2 Sol. Short to Volts

F5

Yes/No

No

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

Commanded Gear

F0, F1, F2, F3, F4, F5, F6

1, 2, 3, 4

1

Cruise

F0

Enabled/Disabled

Disabled

Current TAP Cell

F7/F0, F7/F1

kPa/psi

Varies

ECT

F0, F1

°C (°F)

Varies

Engine Run Time

F0

Hr/Min/Sec

Varies

Engine Speed

F0, F1, F2, F3, F4, F5, F6

RPM

Varies

Engine Torque

F0

N·m (lb ft)

Varies

Estimated Gear Ratio

F0, F1, F2, F3, F4

Ratio

8.00:1

Ignition Voltage

F0

Volts

12-14 Volts

Last Shift Time

F0

Seconds

Varies

PC Sol. Actual Current

F0, F6

Amps

Varies (0.1-1.1 amps)

PC Sol. Duty Cycle

F0, F6

Percent

Varies

PC Sol. Ref. Current

F0, F6

Amps

Varies (0.1-1.1 amps)

Speed Ratio

F0, F1, F2, F3, F4, F5

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 Enable

F0, F1

Yes/No

No

TCC Enable Open/Short to GND

F1

Yes/No

No

TCC Enable Short to Volts

F1

Yes/No

No

TCC Slip Speed

F0, F1

RPM

+/-50 RPM from Engine Speed

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, F6

Volts

Varies

Torque Converter Efficiency

F0, F1, F2, F3, F4

Ratio

.00:1

TP Indicated Angle

F0, F1, F2, F3, F4, F5, F6

Percent

0%

TR Sw.

F0

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

Park/Neutral

TR Sw. A/B/C/P

F0

HI/LOW

LOW/HI/HI/LOW

Trans. Fluid Temp.

F0, F1, F5, F6

°C (°F)

Varies

Trans. Slip Counter

F0, F1

0, 1, 2

0

Transfer Case Ratio

F0, F2, F3, F4

Ratio

0.00:1

Transmission Hot Mode

F0, F1

On/Off

Off

Transmission OSS

F0, F1, F2, F3, F4, F5

RPM

0

Vehicle Speed

F0, F1, F2, F3, F4, F5

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: 3-2 Downshift Data
    • F6: PC Solenoid Data
    • F7: Transmission Adapts
    • F7/F0: 1-2 Adapt. Data
    • F7/F1: 2-3 Adapt. Data

Scan Tool Data List 5.3L and 6.0L

Use the scan tool data list under the following conditions:

    • The Diagnostic System Check - Vehicle in Vehicle DTC Information 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 Displayed

Typical Data Value

1-2 Shift Error

F2, F7/F0

Seconds

Varies

1-2 Shift Time

F0, F2, F7/F0

Seconds

Varies

1-2 Sol.

F0, F2, F3, F4

On/Off

On

1-2 Sol. CKT Status

F2

OK, Open/Short to GND, Short to Volts

OK

1-2 TAP Cell (4-14)

F7/F0

kPa/psi

Varies

2-3 Shift Error

F3, F7/F1

Seconds

Varies

2-3 Shift Time

F0, F3, F7/F1

Seconds

Varies

2-3 Sol.

F0, F2, F3, F4

On/Off

On

2-3 Sol. CKT Status

F3

OK, Open/Short to GND, Short to Volts

OK

2-3 TAP Cell (4-14)

F7/F1

kPa/psi

Varies

3-2 Downshift Sol.

F0, F5

On/Off

On

3-2 Sol. CKT Status

F5

OK, Open/Short to GND, Short to Volts

OK

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

Calc. Throttle Position

F0, F1, F2, F3, F4, F5, F6

Percent

Varies

Commanded Gear

F0, F1, F2, F3, F4, F5, F6

1, 2, 3, 4

1

Current TAP Cell

F7/F0, F7/F1

4-16

Varies

ECT

F0, F1

°C (°F)

Varies

Engine Speed

F0, F1, F2, F3, F4, F5, F6

RPM

Varies

Engine Torque

F0, F1

N·m (lb ft)

Varies

Estimated Gear Ratio

F0, F1, F2, F3, F4

Ratio

8.00:1

Ignition Voltage

F0

Volts

12-14 Volts

Last Shift Time

F0

Seconds

Varies

PC Sol. Actual Current

F0, F6

Amps

Varies (0.1-1.1 amps)

PC Sol. Duty Cycle

F0, F6

Percent

Varies

PC Sol. Ref. Current

F0, F6

Amps

Varies (0.1-1.1 amps)

Speed Ratio

F0, F1, F2, F3, F4, F5

Ratio

8.00:1

TCC Brake Switch

F0, F1

Open/Closed

Closed

TCC Duty Cycle

F0, F1

Percent

0%

TCC Duty Cycle CKT Status

F1

OK, Open/Short to GND, Short to Volts

OK

TCC Enable Sol.

F0, F1

On/Off

No

TCC Enable Sol. CKT Status

F1

OK, Open/Short to GND, Short to Volts

OK

TCC Slip Speed

F0, F1

RPM

+/-50 RPM from Engine Speed

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

Torque Converter Efficiency

F0, F1, F2, F3, F4

Ratio

.00:1

Tow/Haul Mode

F0

Active/Inactive

Inactive

TR Sw.

F0

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

Park/Neutral

TR Sw. A/B/C/P

F0

HI/LOW

LOW/HI/HI/LOW

Trans. Fluid Temp.

F0, F1, F5, F6

°C (°F)

Varies

Trans. Slip Counter

F0, F1

0, 1, 2

0

Transfer Case Ratio

F0, F2, F3, F4

Ratio

2.61:1

Transmission Hot Mode

F0, F1

On/Off

Off

Transmission ISS

F0, F1, F2, F3, F4, F5

RPM

0

Transmission OSS

F0, F1, F2, F3, F4, F5

RPM

0

Vehicle Speed

F0, F1, F2, F3, F4, F5

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: 3-2 Downshift Data
    • F6: PC Solenoid Data
    • F7: Transmission Adapts
    • F7/F0: 1-2 Adapt. Data
    • F7/F1: 2-3 Adapt. Data