Transmission Scan Tool Data Values
Use the scan tool data values 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
Scan Tool Data Value Examples (1999 Y-Car)
Code
Scan Tool Parameter
 Data List*
 Units
 Typical Data Value
 
1-2 Shift Error
 F2, F7
 Seconds
 Varies
 
1-2 Shift Time
 F0, F2
 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)
 F7
 kPa/Psi
 Varies
 
2-3 Shift Error
 F3, F8
 Seconds
 Varies
 
2-3 Shift Time
 F0, F3
 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 (4-16)
 F8
 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
 
A/C Clutch
 F0
 On/Off
 Off
 
Adaptable Shift
 F0, F7, F8
 Yes/No
 No
 
APP Average
 F0, F1, F2, F3, F4, F5
 Counts
 Varies
 
APP Indicated Angle
 F0, F1, F2, F3, F4, F5
 Percent
 0%
 
Cruise
 F0
 Enabled/Disabled
 Disabled
 
Current Gear
 F0, F1, F2, F3, F4, F5, F6
 1,2,3,4
 1
 
Current TAP Cell
 F7, F8
 4-16
 Varies
 
Current TAP Memory
 F7, F8
 -16 to +16
 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
 
IAT
 F0
 °C (°F)
 Varies
 
Ignition Voltage
 F0
 Volts
 12-14 Volts
 
PC Sol. Actual Current
 F0, F6
 Amps
 Varies (0.1-1.1 amps)
 
PC Solenoid Duty Cycle
 F0, F6
 Percent
 Varies
 
PC Sol. Ref. Current
 F0, F6
 Amps
 Varies (0.1-1.1 amps)
 
Speed Ratio
 F0, 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
 F0, F1
 Yes/No
 No
 
TCC Duty Cycle Short to Volts
 F0, F1
 Yes/No
 No
 
TCC Enable
 F0, F1
 Yes/No
 No
 
TCC Enable Open/Short to GND
 F0, F1
 Yes/No
 No
 
TCC Enable Short to Volts
 F0, F1
 Yes/No
 No
 
TCC Mode
 F0, F1
 0-5
 0
 
TCC Slip Speed
 F0, F1
 RPM
 +/-50 RPM from Engine Speed
 
TFP Switch A/B/C
 F0
 On/Off
 Off/On/Off
 
TFT Sensor
 F0, F1
 Volts
 Varies
 
TP Desired Angle
 F0, F1, F2, F3, F4, F5
 Percent
 0-10%
 
TP Indicated Angle
 F0, F1, F2, F3, F4, F5
 Percent
 0-10%
 
Trans. Fluid Temp.
 F0, F1, F5, F6
 °C (°F)
 Varies
 
Transmission Hot Mode
 F0, F1
 On/Off
 Off
 
Transmission OSS
 F0, F1, F2, F3, F4, F5, F6
 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 Down Shift Data
F6: PC Solenoid Data
F7: 1-2 Adapt Data
F8: 2-3 Adapt Data


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