Owner manual

Retrieving ECM Codes
GM 2-6
will still affect it) before retrieving trouble codes. Refer to your
vehicle's service/repair manual for specifications and system
testing procedures which apply to your particular vehicle.
2.4 ERASING SERVICE CODES
•
Always observe safety precautions before and during
testing process.
1. Turn off ignition.
2. Remove ECM fuse from the fuse block or disconnect the
negative battery cable to disconnect power to the vehicle's
computer.
3. Wait fifteen seconds for codes to be erased from the
computer's memory.
4. Reconnect ECM fuse or reconnect negative battery cable.
NOTE: Once the computer's memory has been erased your
vehicle may run rough for up to 40 miles while new
information is being saved in the vehicle's computer.
If the battery cable is removed, you will have to
reprogram your radio, clock and memory seat
position.
2.5 ECM SERVICE CODES
•
Consult your vehicle's service manual for detailed
meanings or definitions related to your vehicle.
Refer to the appropriate service codes table for your vehicle:
2.5.1 GM Engine/Electronic Transmission Service Codes;
Saturn Engine Service Codes
2.5.2 Saturn Electronic Transmission Service Codes
Refer to the "Diagnostic Charts" and "Diagnostic Aids" in your
vehicle's service manual to further assist in the fault isolation
and elimination process.