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 Neutral |
| • | Closed Loop operation |
| • | Accessories OFF |
| • | Brake pedal not applied |
Scan Tool Parameter | Data List* | Units Displayed | Typical Data Values | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Clutch Pedal Switch | F0, F1 | Applied/Released | Released | ||||||||||||
Vehicle Speed Sensor | ALL | km/h (mph) | 0 | ||||||||||||
*Data List Legend
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