Retrieving Codes
- Perform diagnostic circuit check before diagnosing vehicle using self-diagnostic system. See appropriate DIAGNOSTIC CIRCUIT CHECK chart under DIAGNOSTIC CODE CHARTS (EXCEPT GSI)
or DIAGNOSTIC CODE CHARTS (GSI)
.
- Ensure ignition is off. Using a jumper wire, connect jumper between diagnostic check connector terminals "TE1" and "E1". See Fig 1
. Connector is located on left strut tower. Turn ignition on and observe CHECK ENGINE light. Read fault code(s). Proceed to appropriate chart(s) under DIAGNOSTIC CODE CHARTS (EXCEPT GSI)
or DIAGNOSTIC CODE CHARTS (GSI)
to diagnose fault codes.
- If no fault codes are stored, CHECK ENGINE light will flash on and off rapidly until jumper wire is disconnected. Count the number of flashes and look for pauses in flashing to ensure no fault codes are overlooked. If fault codes are stored, code will flash 3 times starting with the lowest code.
Courtesy of GENERAL MOTORS CORP.