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Home >> Infiniti >> 2007 >> M35 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Body, Lock & Security System >> 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.
      TERMINAL VOLTAGE CHART

      Terminals Voltage (V) (Approx.)
      (+) (-)
      Steering lock unit connector Terminal
      M35 7 Ground Battery voltage

    OK or NG 

    OK: GO TO  3.

    NG: GO TO 2.

    Fig 1: Checking Voltage Between Steering Lock Unit Connector Terminal 7 And Ground
    G05212315
  2. CHECK HARNESS CONTINUITY 1 
    1. Disconnect Intelligent Key unit connector.
    2. Check continuity between Intelligent Key unit connector and steering lock unit connector.
      TERMINAL CONTINUITY 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.
      TERMINAL CONTINUITY CHART

      A Ground Continuity
      Intelligent Key unit connector Terminal
      M32 15 No
      Fig 2: Checking Continuity Between Intelligent Key Unit Connector And Steering Lock Unit Connector
      G05212316

    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.
      TERMINAL VOLTAGE 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

    OK or NG 

    OK: Replace steering lock unit.

    NG: GO TO 4.

    Fig 3: Checking Voltage Between Steering Lock Unit Connector Terminal 4 And Ground
    G05212317
  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.
      TERMINAL CONTINUITY 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.
      TERMINAL CONTINUITY CHART

      A Ground Continuity
      Intelligent Key unit connector Terminal
      M32 16 No
      Fig 4: Checking Continuity Between Intelligent Key Unit Connector And Steering Lock Unit Connector
      G05212318

    OK or NG 

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

    NG: Repair or replace harness.

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