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BCM: Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE AND FUSIBLE LINK

    Check if the following BCM fuses or fusible link are blown.

    FUSE AND FUSIBLE LINK REFERENCE

    Terminal No. Signal name Fuse and fusible link No.
    1 Battery power supply H
    11 10
    24 7

    Is the fuse or fusible link blown? 

    YES: Replace the blown fuse or fusible link after repairing the affected circuit.

    NO: GO TO 2

  2. CHECK POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect BCM.
    3. Check voltage between BCM harness connector and ground.
    VOLTAGE SPECIFICATION

    Terminals Voltage (Approx.)
    (+) (-)
    BCM Ground
    Connector Terminal
    M16 (A) 1 Battery voltage
    M17 (B) 11
    M18 (C) 24

    Is the measurement normal? 

    YES: GO TO 3

    NO: Repair or replace harness.

    3. Fig 1: Checking Voltage Between BCM Harness Connector And Ground
    G05910986Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK GROUND CIRCUIT

    Check continuity between BCM harness connector and ground.

    CONTINUITY SPECIFICATION

    BCM Ground Continuity
    Connector Terminal
    M17 13 Yes

    Does continuity exist? 

    YES: Inspection End.

    NO: Repair or replace harness.

Fig 2: Checking Continuity Between BCM Harness Connector And Ground
G05910987Courtesy of NISSAN MOTOR CO., U.S.A.


  1. CHECK FUSE AND FUSIBLE LINK

    Check if the following BCM fuses or fusible link are blown.

    FUSE AND FUSIBLE LINK REFERENCE

    Terminal No. Signal name Fuse and fusible link No.
    1 Battery power supply H
    11 10
    24 7

    Is the fuse or fusible link blown? 

    YES: Replace the blown fuse or fusible link after repairing the affected circuit.

    NO: GO TO 2

  2. CHECK POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect BCM.
    3. Check voltage between BCM harness connector and ground.
    VOLTAGE SPECIFICATION

    Terminals Voltage (Approx.)
    (+) (-)
    BCM Ground
    Connector Terminal
    M16 (A) 1 Battery voltage
    M17 (B) 11
    M18 (C) 24
    Fig 1: Checking Voltage Between BCM Harness Connector And Ground
    G05911349Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the measurement normal? 

    YES: GO TO 3

    NO: Repair or replace harness.

  3. CHECK GROUND CIRCUIT

    Check continuity between BCM harness connector and ground.

    CONTINUITY SPECIFICATION

    BCM Ground Continuity
    Connector Terminal
    M17 13 Yes

    Does continuity exist? 

    YES: Inspection End.

    NO: Repair or replace harness.

Fig 2: Checking Continuity Between BCM Harness Connector And Ground
G04888296Courtesy of NISSAN MOTOR CO., U.S.A.
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