W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
6–122
Copyright © 1998 General Motors Corp.
DIAGNOSTIC CODES
NOTE:
Code 69 XX can be generated by low solenoid resistance, approximately 1–2 Ohms.
For subcodes 12 through 26, 34, and 36:
1.
Replace ECU and note diagnostic code on paperwork accompanying the ECU being returned.
For subcode 32:
1.
Turn off vehicle ignition and restart the ECU. If the code recurs, replace the ECU.
For subcodes 33 through 41, except 34 and 36:
1.
Remove the ECU core cover or shift selector.
2.
Reseat the EPROM.
3.
Reinstall the core cover or shift selector.
4.
If problem recurs, reload the calibration in the EEPROM.
5.
If problem recurs, replace the ECU and note diagnostic code(s) on paperwork accompanying the ECU
being returned.
CAUTION:
Static electricity can destroy the EEPROM. If the ECU must be opened, use Anti-Static
Wrist Strap BT 8639-B to prevent a static electricity discharge to the EEPROM.
CODE 69 XX — ECU MALFUNCTION
