Scan Tool Data List: Notes

Use the scan tool data list under the following conditions:

• The Diagnostic 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