GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data values under the following conditions:

    • The Diagnostic System Check - Vehicle in Vehicle DTC Information 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 Value

CPP Switch (If Equipped)

1, 8, 10, 14

APPLIED/RELEASED

RELEASED

Reverse Inhibit Solenoid Circuit Status

14

  

Reverse Inhibit Solenoid Command

14

ON/OFF

OFF

Skip Shift Lamp Command

12

  

Skip Shift Solenoid Circuit Status

14

  

Skip Shift Solenoid Command

14

SKIP/NO SKIP

NO SKIP

TFT Sensor (If Equipped)

9, 14

°C/°F

85-115°C (185-239°F)

Vehicle Speed Sensor

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14

km/h (mph)

0

*Data List Legend

    • (1) Engine Data
    • (2) EVAP Data
    • (3) Fuel Trim Data
    • (4) H02S Data
    • (5) Ignition Data
    • (6) Misfire Data
    • (7) ODM Data
    • (8) TAC Data
    • (9) Cooling/HVAC Data
    • (10) Cruise Control Data
    • (11) Electrical/Theft Data
    • (12) IPC Data
    • (13) Automatic Trans.
    • (14) Manual Trans.