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Key Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2006 Infiniti QX56. 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. 19, located in the fuse block (J/B)] is blown. Refer to "WIRING DIAGRAM - CHIME - ".

    Is the fuse blown? 

    1. YES : Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.
    2. NO : GO TO 2.
  2. CHECK WARNING CHIME OPERATION 

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

    Does warning chime sound? 

    1. YES : GO TO 3.
    2. 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.

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

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

    Fig 1: Consult-II Screen Display - Data Monitor
    G04136397Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

    VOLTAGE TERMINAL REFERENCE

    Terminals Condition Voltage (V)
    (+) (-)
    Connector Terminal
    M18 37 Ground Key is inserted Battery voltage
    Key is removed 0
    Fig 2: Identifying Voltage Between BCM Harness Connector M18 Terminal 37 And Ground
    G04136398Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace the BCM. Refer to "BCM ".
    2. NG : GO TO 4.
  4. CHECK KEY SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect key switch and key lock solenoid connector.
    3. Check continuity between key switch and key lock solenoid terminals 3 and 4.
      CONTINUITY TERMINAL REFERENCE

      Terminals Condition Continuity
      3 4 Key is inserted Yes
      Key is removed No
      Fig 3: Identifying Continuity Between Key Switch And Key Lock Solenoid Terminals 3 And 4
      G04136399Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO 5.
    2. NG : Replace the key switch and key lock solenoid.
  5. CHECK KEY SWITCH CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector M18 terminal 37 and key switch and key lock solenoid harness connector M27 terminal 4.

      Continuity should exist. 

    3. Check continuity between BCM harness connector M18 terminal 37 and ground.

      Continuity should not exist. 

      Fig 4: Identifying Continuity Between BCM Harness Connector M18 Terminal 37 And Ground
      G04136400Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO 6.
    2. NG : Repair harness or connector.
  6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 

    Check voltage between key switch and key lock solenoid harness connector M27 terminal 3 and ground.

    Battery voltage should exist. 

    Fig 5: Identifying Voltage Between Key Switch And Key Lock Solenoid Harness Connector M27 Terminal 3 And Ground
    G04136401Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace the BCM. Refer to "BCM ".
    2. NG : Check harness for open or short between fuse and key switch and key lock solenoid.
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