For 1990-2009 cars

Use the Typical Scan Tool Data Values table under the following conditions:

• | The Transmission On-Board Diagnostic (OBD) System Check is 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

#### Transmission Scan Tool Data Values

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
1-2/3-4 Solenoid | F0, F2 | On/Off | Off
2-3 Solenoid | F0, F2 | On/Off | On
Accelerator Pedal Posit | F0, F1, F2, F3 | % | 0
Band Apply Solenoid | F0, F2 | % | 0
Battery Voltage | F0 | Volts | 12.0-14.7
Brake Switch | F0, F1 | Applied/Released | Released
Commanded Gear | F0, F1, F2, F3 | 1-2-3-4 | 1
DTC #1 | F0 | Code Number | 0
DTC #2 | F0 | Code Number | 0
Default Mode | F0 | Active/Inactive | Inactive
ECT | F0, F1 | °C/°F | 85-115°C (185-239°F)
Engine Speed | F0, F1, F2, F3 | RPM | 650-800 RPM
Engine Torque | F0, F1 | N·m/lb ft | 0-13 N·m(lb ft)
Engine Torque Reduction | F0 | N·m/lb ft | 0
MIL Request | F0 | Active/Inactive | Inactive
Number of DTCs | F0 | 1-20 | 0
PC Sol. Actual Current | F0, F3 | Amps | Varies
PRNDL A | F0 | High/Low | High
PRNDL B | F0 | High/Low | Low
PRNDL C | F0 | High/Low | Low
PRNDL P | F0 | High/Low | High
Power Relay Status | F0, F2 | On/Off | On
Shift Pattern Mode | F0, F2 | Economy/Sport | Economy
Sport Mode Lamp | F0 | On/Off | Off
Sport Mode Switch | F0 | On/Off | Off
TCC Slip Speed | F0, F1 | RPM | Varies
TCC Solenoid | F0 | On/Off | Off
TCM Torque Red. Req. | F0 | Yes/No | No
TFT Sensor | F0, F1, F3 | Volts | Approx 2.70 volts
TP Angle | F0, F1, F3 | % | 0
TR Switch P/A/B/C | F0 | On/Off | On/On/Off/Off
Trans. Fluid Temp | F0, F1, F3 | °C/°F | Approx 81°C (177°F)
Transmission OSS | F0, F1, F2 | RPM | 0
Transmission Range | F0, F2 | Park, Reverse, Neutral, Drive, 3rd, 2nd, 1st | Park
Vehicle Speed | F0, F1, F2 | KM/h/MPH | 0
WOT Switch | F0 | On/Off | Off
Winter Mode Lamp | F0 | On/Off | Off
Winter Mode Switch | F0 | On/Off | Off