GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data values under the following conditions:

    • The Diagnostic System Check - Vehicle is complete.
    • The on-board diagnostics (OBDs) 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

Vehicle Speed Sensor

ALL

km/h (mph)

0

*Data List Legend

    • F0: Engine Data 1
    • F1: Engine Data 2
    • F2: Engine Data 3
    • F3: Evap Data
    • F4: Fuel Trim Data
    • F5: Misfire Data
    • F6: TAC Data
    • F7: Cruise Control Data