GM Service Manual Online
For 1990-2009 cars only

Use the Scan Tool Data List under the following conditions:

    • The Diagnostic System Check - Vehicle has been completed
    • The On-Board Diagnostics are functioning properly
    • No DTCs are present

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 service 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 is 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 Error

F2, F7/F0

Seconds

Varies

1-2 Shift Time

F0, F2, F7/F0

Seconds

Varies

1-2 Sol.

F0, F2, F3, F4, F5

On/Off

Off

1-2 Sol. CKT Status

F2

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

OK

1-2 TAP Cell (4-16)

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, F5

On/Off

On

2-3 Sol. CKT Status

F3

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

OK

2-3 TAP Cell (4-16)

F7/F1

kPa (psi)

Varies

3-4 Shift Error

F4, F7/F2

Seconds

Varies

3-4 Shift Time

F0, F4, F7/F2

Seconds

Varies

3-4 TAP Cell (4-16)

F7/F2

kPa (psi)

Varies

4-5 Shift Error

F5, F7/F3

Seconds

Varies

4-5 Shift Time

F0, F5, F7/F3

Seconds

Varies

4-5 Sol.

F0, F2, F3, F4, F5

On/Off

Off

4-5 Sol. CKT Status

F5

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

OK

4-5 TAP Cell (4-16)

F7/F3

kPa (psi)

Varies

A/C Clutch

F0

On/Off

Off

Commanded Gear

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

1,2,3,4,5

1

Cruise

F0

Enabled/Disabled

Disabled

Current TAP Cell

F7/F0, F7/F1, F7/F2, F7/F3

4-16

Varies

Driver Shift Control

F0

Active, Inactive

Inactive

Driver Shift Request

F0

Upshift, Downshift, Invalid, None

None

ECT

F0, F1

°C (°F)

85-115°C (185-239°F)

Engine Speed

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

RPM

650-800 RPM

Engine Torque

F0, F1

N·m(lb ft)

0-13 N·m (lb ft)

Gear Ratio

F0, F1, F2, F3, F4, F5

Ratio

Varies

High Side Driver 1

F6

Enabled/Disabled

Enabled

High Side Driver 1 CKT Status

F6

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

OK

High Side Driver 2

F1, F2, F3, F4, F5

Enabled/Disabled

Enabled

High Side Driver 2 CKT Status

F1, F2, F3, F4, F5

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

OK

Ignition Voltage

F0

Volts

12.0-14.7 Volts

IMS A/B/C/P

F0

HI/LOW

HIGH/LOW/LOW/HIGH

IMS

F0

Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 5, Drive 5, Drive 5/Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Invalid

Park

Last Shift Time

F0

Seconds

Varies

PC Sol. Actual Current

F0, F6

Amps

Varies

PC Solenoid Duty Cycle

F0, F6

%

Varies

PC Sol. Ref. Current

F0, F6

Amps

Varies

Steady State TAP 1 GR

F7/F4

kPa (psi)

Varies

Steady State TAP 1 GR/TCC

F7/F4

kPa (psi)

Varies

Steady State TAP 2 GR

F7/F4

kPa (psi)

Varies

Steady State TAP 2 GR/TCC

F7/F4

kPa (psi)

Varies

Steady State TAP 3 GR

F7/F4

kPa (psi)

Varies

Steady State TAP 3 GR/TCC

F7/F4

kPa (psi)

Varies

Steady State TAP 4 GR

F7/F4

kPa (psi)

Varies

Steady State TAP 4 GR/TCC

F7/F4

kPa (psi)

Varies

Steady State TAP 5 GR

F7/F4

kPa (psi)

Varies

Steady State TAP 5 GR/TCC

F7/F4

kPa (psi)

Varies

Steady State TAP Reverse

F7/F4

kPa (psi)

Varies

TCC Brake Switch

F0, F1

Open/Closed

Closed

TCC Duty Cycle

F0, F1

%

0%

TCC Duty Cycle CKT Status

F1

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

OK

TCC Slip Speed

F0, F1

RPM

0 RPM

TP Angle

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

%

0

Traction Control

F0

Active/Inactive

Inactive

Trans. Fluid Temp.

F0, F1, F6

°C (°F)

85-110°C (185-239°F)

Trans. Oil Life

F0

0-100%

Varies

Transmission Hot Mode

F0, F1

On/Off

Off

Transmission ISS

F0, F1, F2, F3, F4, F5

RPM

650-800 RPM

Transmission OSS

F0, F1, F2, F3, F4, F5

RPM

0 RPM

*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: 4-5 Shift Data
    • F6: PC Solenoid Data
    • F7/F0: Transmission Adapts/1-2 Adapt. Data
    • F7/F1: Transmission Adapts/2-3 Adapt. Data
    • F7/F2: Transmission Adapts/3-4 Adapt. Data
    • F7/F3: Transmission Adapts/4-5 Adapt. Data
    • F7/F4: Transmission Adapts/Steady State Data