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Key Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check if the key switch fuse (No. 25, located in the fuse and fusible link box) is blown. Refer to "WIRING DIAGRAM - CHIME - ".

    Is the fuse blown? 

    YES: Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.

    NO: GO TO 2.

  2. CHECK WARNING CHIME OPERATION 

    With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position.

    Does warning chime sound? 

    YES: GO TO 3.

    NO: Go to "ALL WARNING CHIMES DO NOT OPERATE " or "KEY WARNING CHIME AND LIGHT WARNING CHIME DO NOT OPERATE (SEAT BELT WARNING CHIME DOES OPERATE) ".

  3. CHECK BCM INPUT SIGNAL 

    With CONSULT-II 

    With "DATA MONITOR" of "BUZZER", confirm "KEY ON SW" changes when the key is inserted/removed from the ignition key cylinder.

    Fig 1: Identifying CONSULT II Display - DATA MONITOR
    G04903791

    When key is inserted in ignition key cylinder : KEY ON SW ON 

    When key is removed from ignition key cylinder : KEY ON SW OFF 

    Without CONSULT-II 

    Check voltage between BCM harness connector M18 terminal 37 and ground.

    TERMINAL VOLTAGE CHART

    Terminals Condition Voltage (V)
    (+) (-)
    Connector Terminal
    M18 37 Ground Key is inserted Battery voltage
    Key is removed 0V
    Fig 2: Checking Voltage Between BCM Connector M18 Terminal 37 And Ground
    G04903792

    OK or NG 

    OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION ".

    NG: GO TO 4.

  4. CHECK KEY SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector M27.
    3. Check continuity between key switch terminals 1 and 2.
      TERMINAL CONTINUITY CHART

      Key switch Terminals Condition Continuity
      1 2 Key is inserted Yes
      Key is removed No
      Fig 3: Checking Continuity Between Key Switch Terminals 1 And 2
      G04913954

    OK or NG 

    OK: GO TO 5.

    NG: Replace the key switch.

  5. CHECK KEY SWITCH CIRCUIT 
    1. Disconnect BCM connector M18.
    2. Check continuity between BCM harness connector M18 (A) terminal 37 and key switch harness connector M27 (B) terminal 1.
      CONTINUITY CHART

      A B Continuity
      Connector Terminal Connector Terminal
      BCM: M18 37 Key switch: M27 1 Yes
    3. Check continuity between BCM harness connector M18 (A) terminal 37 and ground.
      CONTINUITY CHART

      A Ground Continuity
      Connector Terminal
      BCM: M18 37 No
      Fig 4: Checking Continuity Between BCM Connector M18 Terminal 37 And Ground
      G04913955

    OK or NG 

    OK: GO TO 6.

    NG: Repair harness or connector.

  6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 

    Check voltage between key switch harness connector M27 terminal 2 and ground.

    TERMINAL VOLTAGE CHART

    Terminals Voltage (Approx.)
    (+) (-)
    Key switch connector Terminal
    M27 2 Ground Battery voltage
    Fig 5: Checking Voltage Between Key Switch Connector M27 Terminal 2 And Ground
    G04913956

    OK or NG 

    OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION ".

    NG: Check harness for open between fuse and key switch.

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