Communication System B

Check the 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 DIAGNOSIS  ".

OK or NG? 

1. OK >> Replace LCU
2. NG >> Perform the following.
   • Repair or replace communication harness between LCU and BCM.
   • Replace with the previously installed LCU.