Retrieving Codes
- Perform diagnostic circuit check before diagnosing vehicle using self-diagnostic system. See appropriate DIAGNOSTIC CIRCUIT CHECK chart under DIAGNOSTIC CODE CHARTS
.
- Ensure ignition is off. Using a jumper wire, connect jumper between Data Link Connector (DLC) terminals TE1 and E1. See Fig 1
. Connector is located on left strut tower. Turn ignition on and observe Malfunction Indicator Light (MIL). Read fault code(s). Proceed to appropriate chart(s) under DIAGNOSTIC CODE CHARTS
to diagnose fault codes.
- If no fault codes are stored, MIL 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. Proceed to appropriate chart(s) under DIAGNOSTIC CODE CHARTS
to diagnose fault codes.
Courtesy of GENERAL MOTORS CORP.