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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2093 (LAN System) >> Service Information >> Trouble Diagnosis >> BCM Branch Line Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and connector side).

    OK or NG 

    OK: GO TO 2.

    NG: Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of BCM.
    2. Check the resistance between the BCM harness connector terminals.
    HARNESS FOR OPEN CIRCUIT

    BCM harness connector Resistance (Ω)
    Connector No. Terminal No.
    M18 39 40 Approx. 54 - 66

    OK or NG 

    OK: GO TO 3.

    NG: Repair the BCM branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the BCM. Refer to "SCHEMATIC ".

    OK or NG 

    OK:

    • Present error: Replace the BCM. Refer to "REMOVAL AND INSTALLATION ".
    • Past error: Error was detected in the BCM branch line.

    NG: Repair the power supply and the ground circuit.

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