Communication System B

1. CHECK HARNESS CONNECTOR 

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

   OK or NG 

   • OK : GO TO 2.
   • NG : Repair the terminals and connectors.
2. CHECK LCU 

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

   OK or NG 

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

COMMUNICATION SYSTEM C 

1. CHECK HARNESS CONNECTOR 

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

   OK or NG 

   • OK : GO TO 2.
   • NG : Repair the terminals and connectors.
2. CHECK BCM 

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

   OK or NG 

   • OK : The harness and connector is checked, and it is normal, replace BCM
   • NG : Repair the harness between the LCU and BCM control.