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Malfunction Indicator Lamp Remains On After Engine Starts: Troubleshooting

NOTE:
  • Before performed troubleshooting, be sure to read the Precautions of ECM Circuit Inspection.
  • When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the special tool to ECM and/or the ECM connectors referring to INSPECTION OF ECM AND ITS CIRCUITS .
TROUBLESHOOTING CHART

Step Action YES NO
1  DTC check 
  1. Start engine and recheck DTC of ECM and TCM (for A/T model) while engine running.

Is there any DTC(s)? 		 Go to Step 2 of Engine and Emission Control System Check  , Step 2 of A/T System Check  . Go to Step 2.
2  CAN communication line circuit check 
  1. Check CAN communication line circuit between control modules for open, short, high resistance and connections referring to Step 9 to 15 DTC U0073: CONTROL MODULE COMMUNICATION BUS OFF .

Is circuit in good condition? 		 Substitute a known-good combination meter and recheck. If MIL still remains ON, substitute a known-good ECM and recheck. Repair or replace CAN communication circuit.
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