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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISELECTRICALGAUGESDRIVER INFORMATION SYSTEMWARNING CHIMEKEY SWITCH AND IGNITION KNOB SWITCH SIGNAL INSPECTION (WITH INTELLIGENT KEY, WHEN MECHANICAL KEY IS USED)
2006 Infiniti FX35 AWD

Key Switch and Ignition Knob Switch Signal Inspection (With Intelligent Key, When Mechanical Key Is Used)

2006 Infiniti FX35 AWDSECTION Key Switch and Ignition Knob Switch Signal Inspection (With Intelligent Key, When Mechanical Key Is Used)
  1. CHECK BCM INPUT SIGNAL 

    With CONSULT-II 

    1. Select "BCM".
    2. With "DATA MONITOR" of "BUZZER", confirm "KEY ON SW" when the key is operated.

      "KEY ON SW" 

      When key is inserted to ignition key cylinder : ON 

      When key is removed from ignition key cylinder : OFF 

      Fig 1: Displaying Data Monitor
      G04078552Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    Check voltage between BCM harness connector M3 terminal 37 and ground.

    37 - Ground 

    When key is inserted to ignition key cylinder : Approx. 12 V 

    When key is removed from ignition key cylinder : Approx. 0 V 

    Fig 2: Identifying Voltage Between BCM Harness Connector M3 Terminal 37 And Ground
    G04078553Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : INSPECTION END

    NG : GO TO 2.

  2. CHECK KEY SWITCH AND IGNITION KNOB SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect key switch and ignition knob switch connector.
    3. Check key switch and ignition knob switch. Refer to "KEY SWITCH AND IGNITION KNOB SWITCH ".

    OK or NG 

    OK : GO TO 3.

    NG : Replace key switch and ignition knob switch.

  3. CHECK KEY SWITCH AND IGNITION KNOB SWITCH CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector M3 terminal 37 and key switch and ignition knob switch harness connector M22 terminal 4.

      37 - 4 : Continuity should exist. 

    3. Check continuity between BCM harness connector M3 terminal 37 and ground.

      37 - Ground : Continuity should not exist. 

    OK or NG 

    OK : GO TO 4.

    NG : Repair harness or connector.

    Fig 3: Identifying Continuity Between BCM Harness Connector M3 Terminal 37 And Ground
    G04078554Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 

    Check voltage between key switch and ignition knob switch harness connector M22 terminal 3 and ground.

    3 - Ground : Battery voltage 

    OK or NG 

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

    NG : Check harness between key switch and ignition knob switch and fuse.

    Fig 4: Identifying Voltage Between Key Switch And Ignition Knob Switch Harness Connector M22 Terminal 3 And Ground
    G04078555Courtesy of NISSAN MOTOR CO., U.S.A.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.