Communication System B

Check terminals (at the control unit and harness) on the malfunctioning LCU for disconnection, bend, loose connection, and other malfunctions.

OK or NG 

1. OK: GO TO 2.
2. NG: Repair the terminals and connectors.

Replace the malfunctioning LCU with a known-good one, and carry out the communication diagnosis. Refer to "IVMS COMMUNICATION INSPECTION. ".

OK or NG 

1. OK: The harness and connector is checked, and it is normal, replace LCU
2. NG: Repair the harness between the indicated LCU and BCM.