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Home >> Oldsmobile >> 2002 >> Intrigue GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 3.5L >> System Tests >> Mil Inoperative >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Inspect the Instrument Panel Cluster (IPC) fuse. Is fuse open? If yes, go to step  10. If no, go to next step.
  3. Turn ignition off. Disconnect PCM. Turn ignition on, with engine off. Connect a 3-amp fuse jumper wire between the MIL control circuit and a good ground. Observe MIL. Is MIL illuminated? If yes, go to step  9. If no, go to next step.
  4. Did fuse in jumper wire open? If yes, go to step  11. If no, go to next step.
  5. Remove the Instrument Panel Cluster (IPC). Test the MIL control circuit for an open between the PCM and IPC. See WIRING DIAGRAMS article. Did you find and correct the condition? If yes, go to step  14. If no, go to next step.
  6. Probe MIL battery positive voltage circuit at IPC harness connector with a test light connected to a good ground. Does test light illuminate? If yes, go to step  8. If no, go to next step.
  7. Repair open in MIL ignition positive voltage circuit. After repairs, go to step  14.
  8. Inspect for poor connections at the IPC harness connector. Did you find and correct the condition? If yes, go to step  14. If no, go to step  12.
  9. Inspect for poor connections at PCM harness connector. Did you find and correct the condition? If yes, go to step  14. If no, go to step  13.
  10. Repair short to ground in MIL battery positive voltage circuit. Replace fuse. After repairs, go to step  14.
  11. Repair short to voltage in MIL control circuit. After repairs, go to step  14.
  12. Replace IPC. After repairs, go to step  14.
  13. Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. When complete, go to next step.
  14. Operate system in order to verify repair. Did you correct the condition? If yes, system is okay. If no, go to step  2.
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