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Test E: Warning Indicator Is Off With Ignition On

  1. Check The Fault Codes In The PCM

    Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition switch to RUN position. Using NGS tester, perform Powertrain Control Module (PCM) self-test. If no DTCs exist, go to next step. If any DTCs exist, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE in ENGINE PERFORMANCE.

  2. Check The Charging System Warning Indicator Operation

    Turn ignition off. Disconnect the New Generation Star (NGS) tester. Disconnect generator 3-pin connector. Turn ignition on. With the engine off, connect a fused (15A), jumper wire between the generator connector terminal No. 1 (Brown/Pink wire) and ground. See Figure. Does the charging system warning indicator illuminate? If yes, install a new generator. See GENERATOR  under REMOVAL & INSTALLATION. Test the system for normal operation. If no, go to next step.

  3. Check For Correct PCM Operation

    Check for corrosion and pushed-out pins. Connect any disconnected connectors. Make sure all other system connectors are fully seated. 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 REMOVAL & INSTALLATION article in ENGINE PERFORMANCE. Repeat the PCM self-test. If no, the system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. Clear the DTCs. Repeat the self-test.
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