Reading and Clearing Diagnostic Trouble Codes

NOTE: OE doesn't provide a procedure to extract or clear trouble codes without a NGS tester.

1. Connect the New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

2. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
3. Carry out the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
- CKT914, CKT915 or CKT70-ALL ECUS NO RESP/NOT EQUIP, For additional information, refer to Module Communications Network.
- NO RESP/NOT EQUIP for anti-lock brake control module, go to Pinpoint Test A.A Check Central Junction Box (CJB)
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the anti-lock brake control module.

4. If the DTCs retrieved and related to the concern, go to Anti-Lock Brake Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.Diagnostic Trouble Code Descriptions
5. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.Symptom Related Diagnostic Procedures