GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data values under the following conditions:

    â€¢ The Diagnostic System Check - Vehicle is complete.
    â€¢ The on-board diagnostics (OBDs) are functioning properly.
    â€¢ 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:

    â€¢ Engine at idle
    â€¢ Upper radiator hose hot
    â€¢ Closed throttle
    â€¢ Transmission in Neutral
    â€¢ Closed Loop operation
    â€¢ Accessories OFF
    â€¢ 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

    â€¢ Engine Data (1)
    â€¢ Air Data (2)
    â€¢ CMP Data (3)
    â€¢ Evap Data (4)
    â€¢ Fuel Trim Data (5)
    â€¢ HO2S Data (6)
    â€¢ Ignition Data (7)
    â€¢ Induction Data (8)
    â€¢ Misfire Data (9)
    â€¢ TAC Data (10)
    â€¢ Cooling/HVAC Data (11)
    â€¢ Cruise Control Data (12)
    â€¢ Electrical/Theft Data (13)
    â€¢ IPC Data (14)
    â€¢ I/M Data (15)