Test E: Warning Indicator Off With Ignition On

Check Charging System Warning Indicator Operation

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition on. Enter the ACTIVE COMMANDS diagnostic mode on NGS tester. Using the ACTIVE COMMANDS, turn on the charging system warning indicator in the instrument cluster. Is the charging system warning indicator on? If yes, go to next step. If no, see appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT to diagnose the charging system warning indicator.

Check For Correct PCM Operation

Disconnect PCM connector. Check for corrosion and pushed-out pins. Connect PCM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? If yes, install a new PCM. See COMPUTERIZED ENGINE CONTROLS in appropriate REMOVAL & INSTALLATION article in ENGINE PERFORMANCE. Test the system for normal operation. If no, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. Clear the DTCs. Repeat the self-test. Test the system for normal operation.