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Home >> Infiniti >> 2009 >> M45 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Body, Lock & Security System >> Service Information >> Intelligent Key System/Engine Start Function >> DTC B2013: STRG Comm 1 >> Diagnostic Procedure
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Diagnostic Procedure

  1. CHECK STEERING LOCK UNIT POWER SUPPLY
    1. Turn ignition switch OFF.
    2. Disconnect steering lock unit connector.
    3. Check voltage between steering lock unit connector and ground.
    VOLTAGE REFERENCE CHART

    Terminals Voltage (V) (Approx.)
    (+) (-)
    Steering lock unit connector Terminal
    M35 7 Ground Battery voltage
    Fig 1: Checking Voltage Between Steering Lock Unit Connector And Ground
    G05212315Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  3.

    NG: GO TO  2.

  2. CHECK HARNESS CONTINUITY 1
    1. Disconnect Intelligent Key unit connector.
    2. Check continuity between Intelligent Key unit connector and steering lock unit connector.
      CONTINUITY REFERENCE CHART

      A B Continuity
      Intelligent Key unit connector Terminal Steering lock unit connector Terminal
      M32 15 M35 7 Yes
    3. Check continuity between Intelligent Key unit connector and ground.
    Fig 2: Checking Continuity Between Intelligent Key Unit And Steering Lock Unit Connector
    G05212316Courtesy of NISSAN MOTOR CO., U.S.A.
    CONTINUITY REFERENCE CHART

    A Ground Continuity
    Intelligent Key unit connector Terminal
    M32 15 No

    OK or NG 

    OK: Check the condition of harness and connector.

    NG: Repair or replace harness.

  3. CHECK STEERING LOCK UNIT SIGNAL
    1. Connect steering lock unit connector.
    2. Check voltage between steering lock unit connector and ground.
    VOLTAGE REFERENCE CHART

    Terminals Condition Voltage (V) (Approx.)
    (+) (-)
    Steering lock unit connector Terminal
    M35 4 Ground When turn ignition switch to START with Intelligent Key in the car Battery voltage
    ↓
    0
    ↓
    Battery voltage
    Fig 3: Checking Voltage Between Steering Lock Unit Connector And Ground
    G05212317Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: Replace steering lock unit.

    NG: GO TO  4.

  4. CHECK HARNESS CONTINUITY 2
    1. Turn ignition switch OFF.
    2. Disconnect Intelligent Key unit and steering lock unit connector.
    3. Check continuity between Intelligent Key unit connector and steering lock unit connector.
      CONTINUITY REFERENCE CHART

      A B Continuity
      Intelligent Key unit connector Terminal Steering lock unit connector Terminal
      M32 16 M35 4 Yes
    4. Check continuity between Intelligent Key unit connector and ground.
    Fig 4: Checking Continuity Between Intelligent Key Unit Connector And Ground
    G05212318Courtesy of NISSAN MOTOR CO., U.S.A.
    CONTINUITY REFERENCE CHART

    A Ground Continuity
    Intelligent Key unit connector Terminal
    M32 16 No

    OK or NG 

    OK: Check the condition of harness and connector. If it is OK, check the self-diagnosis results using CONSULT-III again.

    NG: Repair or replace harness.

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