Copyright © 1998 General Motors Corp. 6–121
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
Main code 69 indicates the ECU has malfunctioned. To assist in tracking ECU reliability, the subcode has been
included to indicate the cause of the ECU malfunction. Most codes, except Code 69 34, can be cleared; but they
will probably recur. Replacing the ECU corrects the problem.
NOTE: A “cateyes” display may occur with subcode 32.
A “cateyes” display may occur with subcode 33 if a remote ECU is used, or a blank display may occur if the ECU
is integral to the shift selector.
Active Indicator Clearing Procedure:
• Power down
• Manual — except subcodes 32, 33, 35, 36, 41
• Self-clearing — subcode 32 after an ECU reset
NOTE: Subcode 34 cannot be cleared.
Main
Code
Subcode Meaning
69 12 ECU, open driver, A solenoid circuit
69 13 ECU, open driver, B solenoid circuit
69 14 ECU, open driver, C solenoid circuit
69 15 ECU, open driver, D solenoid circuit
69 16 ECU, open driver, E solenoid circuit
69 21 ECU, open driver, F solenoid circuit
69 22 ECU, open driver, G solenoid circuit
69 23 ECU, open driver, H solenoid circuit
69 24 ECU, open driver, J solenoid circuit
69 25 ECU, open driver, K solenoid circuit
69 26 ECU, open driver, N solenoid circuit
69 32 ECU, SPI communications link fault
69 33 ECU, central operating processor timeout
69 34 ECU, EEPROM write timeout
69 35 ECU, EEPROM checksum
69 36 ECU, RAM self-check failure
69 41 ECU, I/O ASIC addressing test
CODE 69 XX — ECU MALFUNCTION
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