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Communication System B

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  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 

    1. OK: GO TO  2.
    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 

    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.