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Malfunction Indicator Lamp Remains ON after Engine Starts: Troubleshooting

DIAGNOSIS PROCEDURE

Step Action YES NO
1  DTC check 
  1. Check DTC referring to DTC CHECK .

Is there any DTC(s)? 		 Go to Step 2 of ENGINE AND EMISSION CONTROL SYSTEM CHECK . Go to Step 2.
2  DTC check 
  1. Start engine and recheck DTC while engine running.

Is there any DTC(s)? 		 Go to Step 2 of ENGINE AND EMISSION CONTROL SYSTEM CHECK . Go to Step 3.
3  MIL circuit check 
  1. Turn ignition switch to OFF position.
  2. Remove combination meter referring to COMBINATION METER REMOVAL AND INSTALLATION .
  3. Disconnect connectors from ECM.
  4. Measure resistance between "PPL/YEL" wire terminal of combination meter connector and body ground.

Is resistance infinity? 		 Go to Step 4. "PPL/YEL" wire circuit shorted to ground.
4  MIL circuit check 
  1. Connect connectors to combination meter.

Does MIL turn ON at ignition switch turned ON? 		 Replace combination meter. Substitute a known-good ECM and recheck.
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