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MIL Circuit Troubleshooting

  1. Turn the ignition switch to ON (II).
Does the MIL indicator flash?
YES -
Go to Step 3 .
NO -
Substitute a known-good gauge control module, and recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module.
  1. Check the SCS in the DATA LIST with the HDS.
Is a short indicated?
YES -
Go to Step 5 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect ECM/PCM connector A (49P), then disconnect the HDS.
  1. Check for continuity between ECM/PCM connector terminal A32 and body ground.
Is there continuity?
YES -
Repair short in the wire between the ECM/PCM (A32) and the DLC.■
NO -