LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1096 (Warning Chime) >> Warning Chime >> Key Warning Chime Does Not Operate
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check if the key switch fuse [fuse 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 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 form the ignition key cylinder.

    1. When key is inserted in ignition key cylinder: KEY ON SW ON 
    2. When key is removed from ignition key cylinder: KEY ON SW OFF 

    Without CONSULT-II 

    Check voltage between BCM harness connector M18 terminal 37 (B/ R) and ground.

    VOLTAGE CHART

    Terminals Condition Voltage (V)
    (+) (-)
    Connector Terminal (Wire color)
    M18 37 (B/R) Ground Key is inserted Battery voltage
    Key is removed 0
    Fig 1: Data Monitor Display
    G03500718Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Checking Voltage Between BCM Harness Connector M18 Terminal 37 (B/ R) And Ground
    G03500719Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
    2. NG: GO TO 4.
  4. CHECK KEY SWITCH 
    1. Disconnect key switch connector.
    2. Check continuity between key switch M27 terminals 1 and 2.
      CONTINUITY CHART

      Terminals Condition Continuity
      1 2 Key is inserted Yes
      Key is removed No

      OK or NG

      1. OK: GO TO 5.
      2. NG: Replace the key switch.
      Fig 3: Checking Continuity Between Key Switch M27 Terminals 1 And 2
      G03500720Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK KEY SWITCH CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector M18 terminal 37 (B/R) and key switch harness connector M27 terminal 2 (B/ R).
      1. Continuity should exist. 
    3. Check continuity between BCM harness connector M18 terminal 37 (B/R) and ground.
      1. Continuity should not exist. 

      OK or NG

      1. OK: GO TO 6.
      2. NG: Repair harness or connector.
        Fig 4: Checking Continuity Between BCM Harness Connector M18 Terminal 37 (B/R) And Ground
        G03500721Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 

    Check voltage between key switch harness connector M27 terminal 1 (Y/R) and ground.

    1. Battery voltage should exist. 

    OK or NG

    1. OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
    2. NG: Check harness for open or short between key switch and fuse.
      Fig 5: Checking Voltage Between Key Switch Harness Connector M27 Terminal 1 (Y/R) And Ground
      G03500722Courtesy of NISSAN MOTOR CO., U.S.A.
scientia non olet · About LEMON Manuals