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Communication System A

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 BCM 

    Replace the BCM 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 BCM.
    2. NG: GO TO  2.
  2. CHECK LCU 
    1. Replace with the previously installed BCM.
    2. Replace the 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 or replace harness between the LCU and BCM.

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