Use the scan tool data list 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 Parameter | Data List* | Units Displayed | Typical Data Value | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1-2 Shift Error | F2, F7 | Seconds | Varies | ||||||||||||||||||
1-2 Shift Time | F0, F2, F7 | 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, F8 | 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 | ||||||||||||||||||
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, F8 | 4-16 | 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 | ||||||||||||||||||
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 | ||||||||||||||||||
P1870 Slip Counter | F0, F1 | 0, 1, 2 | 0 | ||||||||||||||||||
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) | ||||||||||||||||||
Power Take Off | F0 | On/Off | On | ||||||||||||||||||
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 | ||||||||||||||||||
Tow/Haul Mode | F0 | Active/Inactive | Inactive | ||||||||||||||||||
TP Angle (Vehicles w/o Traction Control) | F0, F1, F2, F3, F4, F5, F6 | Percent | 0% | ||||||||||||||||||
TP Indicated Angle (Vehicles with Traction Control) | F0, F1, F2, F3, F4, F5, F6 | Percent | 0-10% | ||||||||||||||||||
TP Sensor (Vehicles w/o Traction Control) | F0, F1, F2, F3, F4, F5 | Volts | 0.3-0.9 V | ||||||||||||||||||
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 | ||||||||||||||||||
Traction Control | F0 | Active/Inactive | Inactive | ||||||||||||||||||
Trans. Fluid Temp. | F0, F1, F5, F6 | °C (°F) | Varies | ||||||||||||||||||
Transfer Case Ratio | F0, F2, F3, F4 | Ratio | 2.61:1 | ||||||||||||||||||
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
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