Self-Diagnostic System

Connect Worldwide Diagnostic System (WDS) tester or New Generation Star (NGS) tester to Data Link Connector (DLC). See Figure. DLC is located below steering column. See Figure. Turn ignition switch to RUN position. Using WDS or NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in appropriate MODULE COMMUNICATIONS NETWORK article. If WDS or NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See appropriate MODULE COMMUNICATIONS NETWORK article. If WDS or NGS tester displays NO RESP/NOT EQUIP for Powertrain Control Module (PCM), repair powertrain control concern. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

If WDS or NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using WDS or NGS tester, perform PCM self-test. Perform appropriate test in accordance with DTC retrieved. See POWERTRAIN CONTROL MODULE DTC INDEX  table. Codes listed in this table are only for testing covered in this article. For complete DTC listing, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.