Retrieving Diagnostic Trouble Codes

Connect New Generation Star (NGS) tester to Data Link Connector (DLC) and retrieve charging system Diagnostic Trouble Codes (DTCs). See POWERTRAIN CONTROL MODULE (PCM) DTC INDEX  . If any other DTCs are present, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE to diagnose fault. After repair is complete, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  . If no DTCs are present, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.