Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Infiniti >> 2004 >> QX56 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1231 (Driver Information System) >> Warning Chime >> Key Warning Chime Does Not Operate

Key Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2005 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?

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

    Does warning chime sound?

  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 - KEY ON SW ON
      G02385859Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

    Fig 2: BCM Harness Connector M18 Terminal 37 (B/R) And Ground Voltage Specification Chart
    G02385860Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Checking Voltage Between BCM Harness Connector M18 Terminal 37 (B/R) And Ground
    G02385861Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

  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 connector M27 terminals 3 and 4.
    Fig 4: Key Switch And Key Lock Solenoid Connector Terminals Continuity Specification Chart
    G02385862Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 5: Checking Continuity Between Key Switch And Key Lock Solenoid Connector M27 Terminals 3 And 4
    G02385863Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK: GO TO 5.
    • 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 (B/R) and key switch and key lock solenoid harness connector M27 terminal 4 (B/R).
      • Continuity should exist. 
    3. Check continuity between BCM harness connector M18 terminal 37 (B/R) and ground.
      • Continuity should not exist. 

    OK or NG

    • OK: GO TO 6.
    • NG: Repair harness or connector.
    Fig 6: Checking Continuity Between BCM Harness Connector M18 terminal 37, Key Switch And Key Lock Solenoid Harness Connector M27 Terminal 4
    G02385864Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 

    Check voltage between key switch and key lock solenoid harness connector M27 terminal 3 (Y/R) and ground.

    • Battery voltage should exist. 

    OK or NG

    Fig 7: Checking Voltage Between Key Switch, Key Lock Solenoid Harness Connector M27 Terminal 3 And Ground
    G02385865Courtesy of NISSAN MOTOR CO., U.S.A.