MAIN LINE BETWEEN BCM AND M&A CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
• ECM
• BCM
• Combination meter
4. Check the continuity between the BCM harness connector and the combination meter harness connector.
   

   BCM harness connector		Combination meter harness connector		Continuity
   Connector No.	Terminal No.	Connector No.	Terminal No.
   M122	91	M53	21	Existed
   	90		22	Existed

   
   

YES (Present error)>>Connect all the connectors and diagnose again. Refer to Trouble Diagnosis Flow Chart.

YES (Past error)>>Error was detected in the main line between the BCM and the combination meter.

NO>>Repair the main line between the BCM and the combination meter.