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Inspection For Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSES AND FUSIBLE LINK 
    • Check for blown BCM fuses or fusible link.
    BCM FUSES OR FUSIBLE LINK SPECIFICATION CHART

    Unit Power source Fuse or fusible link No.
    BCM Battery f
    21
    Ignition switch ON or START position 1

    Refer to "WIRING DIAGRAM - ROOM/L -  ".

    OK or NG

    1. OK : GO TO 2.
    2. NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .
  2. CHECK POWER SUPPLY CIRCUIT 
    1. Disconnect bum connector.
    2. Check voltage between BCM connector and ground.
    Fig 1: Checking Voltage Between BCM Connector & Ground
    G03495269Courtesy of NISSAN MOTOR CO., U.S.A.
    TERMINALS SPECIFICATIONS CHART

    Terminals Ignition switch position
    (+) (-) OFF ON
    Connector Terminal (Wire color)
    M19 42 (Y/R) Ground Battery voltage Battery voltage
    55 (W/B) Battery voltage Battery voltage
    M18 38 (G) 0V Battery voltage
    1. OK: GO TO 3.
    2. NG: Check harness for open between BCM and fuse.
  3. CHECK GROUND CIRCUIT 

    Check continuity between BCM and ground.

    Fig 2: Checking Continuity Between BCM & Ground
    G03495270Courtesy of NISSAN MOTOR CO., U.S.A.
    CONTINUITY SPECIFICATION CHART

    Terminals Continuity
    (+) (-)
    Connector Terminal (Wire color)
    M19 49 (B) Ground Yes
    52 (B)

    OK or NG

    1. OK: INSPECTION END
    2. NG: Check harness ground circuit.
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