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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 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, Short to GND, Short to Volts, Indeterminate

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, F5

OK, Short to GND, Short to Volts, Indeterminate

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, Short to GND, Short to Volts, Indeterminate

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

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, 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, Short to GND, Short to Volts, Indeterminate

OK

TCC Enable Sol.

F0, F1

Yes/No

No

TCC Enable CKT Status

F1

OK, Short to GND, Short to Volts, Indeterminate

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

0.00:1

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 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

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

Indeterminate

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

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

Indeterminate

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

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

Indeterminate

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

Brake Switch

F0, F1

Applied/Released

Released

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

Gear Ratio

F0, F1, F2, F3, F4, F5

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)

TCC Duty Cycle

F0, F1

Percent

0%

TCC Duty Cycle CKT Status

F1

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

Indeterminate

TCC Enable Sol.

F0, F1

On/Off

No

TCC Enable Sol. CKT Status

F1

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

Indeterminate

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

TR Sw.

F0

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

Park

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

*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