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GM CCC Trouble Codes
Retrieving and Deciphering GM Computer Command Control Trouble Codes.
Retrieving Computer Command Control Trouble Codes Assembly Line Diagnostic Link (ALDL)location: 1981 Model Procedure: If
you have the distinct honor of having one of the first Computer Command
Control (CCC) systems put into an El Camino, use this method. I think
it was first introduced in California in 80 and the rest of the U.S. got
it in 81. The 80/81 CCC system is different from all other 5th
Generation El Camino CCC systems. This is the 1981 Assembly Line Diagnostic Link (ALDL) In order to pull the stored codes do this: 1. With the ignition off, jumper the two far right terminals as shown in the picture. "D" is the diagnostic terminal and "E" is ground. 2. Turn on the ignition but do not start the engine. 3. The SES light will begin to flash a Trouble code 12. One flash, a short pause, and two flashes. There will be a longer pause and the Code 12 will repeat two more times. 4. The stored Trouble Codes will now flash. Each Code will be repeated three times. Write them down. 5. When Code 12 flashes again that indicates that there are no more stored Trouble Codes. Diagnostic
trouble codes may be cleared by disconnecting the battery, or removing
the ECM fuse for at least 20 seconds. Reconnect and recheck codes to
confirm the repair. Ernie G. 87ElCamino 1982 And Later Model Procedure:
Diagnostic trouble codes may be cleared by
disconnecting the battery, or removing the ECM fuse for at least 20
seconds. Reconnect and recheck codes to confirm the repair.
Diagnostic trouble codes may be cleared by disconnecting the battery, or removing the ECM fuse for at least 20 seconds. Reconnect and recheck codes to confirm the repair. Information compiled by Ernie G. and Robert More
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