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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISBODY & FRAMEEXTERIOR BODY PANELSBODY, LOCK & SECURITY SYSTEMINTELLIGENT KEY SYSTEMCHECK STEERING LOCK UNIT
2006 Infiniti FX35 AWD

Check Steering Lock Unit

2006 Infiniti FX35 AWDSECTION Check Steering Lock Unit
  1. CHECK STEERING LOCK UNIT POWER SUPPLY 
    1. Turn ignition knob LOCK position.
    2. Disconnect steering lock unit connector.
    3. Check voltage between steering lock unit connector M26 terminal 1 (L/R) and ground.

      1 (L/R) - Ground : Battery voltage 

    OK or NG 

    OK : GO TO 2.

    NG : Repair or replace steering lock unit power supply circuit.

    Fig 1: Identifying Voltage Between Steering Lock Unit Connector M26 Terminal 1 (L/R) And Ground
    G04077075Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK STEERING LOCK UNIT GROUND CIRCUIT 

    Check continuity between steering lock unit connector M26 terminal 4 (Y/B) and ground.

    4 (Y/B) - Ground : Continuity should exist. 

    Fig 2: Identifying Continuity Between Steering Lock Unit Connector M26 Terminal 4 (Y/B) And Ground
    G04077076Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 3.

    NG : GO TO  4.

  3. CHECK STEERING LOCK COMMUNICATION CIRCUIT 
    1. Connect steering lock unit connector.
    2. Check voltage between Intelligent Key unit connector M34 terminal 1 (R/W) and ground.

      1 (R/W) - Ground : Approx. 5V 

      Fig 3: Identifying Voltage Between Intelligent Key Unit Connector M34 Terminal 1 (R/W) And Ground
      G04077077Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Immediately after pushing ignition knob, use an oscilloscope to check voltage waveform between Intelligent Key unit connector M34 terminal 32 (R/B) and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Terminal (Wire color) Condition Signal (Reference value)
      (+) (-)
      32 (R/B) Ground Immediately after ignition knob pushing.
      G04077078
      Fig 4: Identifying Voltage Waveform Between Intelligent Key Unit Connector M34 Terminal 32 (R/B) And Ground
      G04077079Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 4.

    NG : Replace Intelligent Key unit.

  4. CHECK STEERING LOCK UNIT COMMUNICATION CIRCUIT 
    1. Disconnect Intelligent Key unit and steering lock unit connectors.
    2. Check continuity between Intelligent Key unit connector M34 terminals 1, 31, 32 and steering lock unit connector M26 terminals 2, 3, 4.

      1 (R/W) - 2 (R/W) : Continuity should exist. 

      31 (Y/B) - 4 (Y/B) : Continuity should exist. 

      32 (R/B) - 3 (R/B) : Continuity should exist. 

    3. Check continuity between steering lock unit connector M26 terminals 2, 3, 4 and ground.

      2 (R/W) - Ground : Continuity should not exist. 

      3 (R/B) - Ground : Continuity should not exist. 

      4 (Y/B) - Ground : Continuity should not exist. 

      Fig 5: Identifying Continuity Between Steering Lock Unit Connector M26 Terminals 2, 3, 4 And Ground
      G04077080Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Replace steering lock unit.

    • After replacing steering lock unit, perform registration procedure.

    NG : Repair or replace harness between steering lock unit and Intelligent Key unit.

RENDER: 1.0x

NO RELATED

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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.