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 connectors.

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

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

OK or NG 

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