Communication System B

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

OK or NG 

1. OK: GO TO 2.
2. NG: Repair terminals and connections.

Replace the LCU with a known-good one, and perform the communication diagnosis.

Refer to IVMS COMMUNICATION INSPECTION  (with CONSULT-II) or COMMUNICATION DIAGNOSIS  (without CONSULT-II).

OK or NG 

1. OK: Replace LCU.
2. NG: Repair communication harness between the indicated LCU and BCM.