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Test B: Charge Indicator Always On

  1. If diagnostic system check was not performed, perform ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. If diagnostic system check was performed, go to next step.
  2. Start engine. If Charge System Fault message remains on, go to next step. If Charge System Fault message does not remain on, problem is intermittent. Check wiring and connections.
  3. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel. Using scan tool, observe Ignition 1 Signal parameter in Powertrain Control Module (PCM) data list. If voltage is 11-15.5 volts, go to next step. If voltage is not 11-15.5 volts, perform TEST A: CHARGING SYSTEM TEST  .
  4. Turn ignition switch to OFF position. Disconnect PCM harness connector. Turn ignition switch to RUN position. If Charge System Fault message is on, go to next step. If Charge System Fault message is off, go to step  7 .
  5. Inspect Instrument Panel Cluster (IPC) harness connector for poor connections. If problem exists, repair as necessary. After repair, go to step  9 . If connections are okay, go to next step.
  6. Replace IPC. See ANALOG INSTRUMENT PANELS - CORVETTE article in ACCESSORIES & EQUIPMENT. After repair, go to step  9 .
  7. Inspect PCM harness connector for poor connections. If problem exists, repair as necessary. After repair, go to step  9 . If problem does not exist, go to next step.
  8. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article in ENGINE PERFORMANCE. Program PCM. After repair, go to next step.
  9. Operate system to verify repair. If system is not operating correctly, repeat test beginning at step  2 .
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