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Home >> Infiniti >> 2011 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Security Control System -- G37 Convertible) >> DTC/Circuit Diagnosis >> DTC B210A: Steering Lock Unit >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2010 Infiniti G37. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECTION START

    Perform inspection in accordance with procedure that confirms DTC.

    Which procedure confirms DTC? 

    DTC confirmation procedure 1: GO TO 2.

    DTC confirmation procedure 2: GO TO  6.

  2. CHECK BCM OUTPUT SIGNAL-1
    1. Turn ignition switch OFF.
    2. Disconnect steering lock unit connector and IPDM E/R connector.
    3. Check voltage between steering lock unit harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      Steering lock unit
      Connector Terminal
      M40 3 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  4.

      NO: GO TO 3.

  3. CHECK STEERING LOCK UNIT CIRCUIT-1
    1. Disconnect BCM connector.
    2. Check continuity between steering lock unit harness connector and BCM harness connector.
      CONTINUITY SPECIFICATION

      Steering lock unit BCM Continuity
      Connector Terminal Connector Terminal
      M40 3 M122 97 Existed
    3. Check continuity between steering lock unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Steering lock unit Ground Continuity
      Connector Terminal
      M40 3 Not existed

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  4. CHECK IPDM E/R OUTPUT SIGNAL-1
    1. Connect IPDM E/R connector.
    2. Disconnect BCM connector.
    3. Check voltage between steering lock unit harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      Steering lock unit
      Connector Terminal
      M40 3 Ground Battery voltage

      Is the inspection result normal? 

      YES: Replace steering lock unit.

      NO: GO TO 5.

  5. CHECK STEERING LOCK UNIT CIRCUIT-2
    1. Disconnect IPDM E/R connector.
    2. Check continuity between steering lock unit harness connector and IPDM E/R harness connector.
      CONTINUITY SPECIFICATION

      Steering lock unit IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M40 3 E5 32 Existed
    3. Check continuity between steering lock unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Steering lock unit Ground Continuity
      Connector Terminal
      M40 3 Not existed

      Is the inspection result normal? 

      YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  6. CHECK BCM OUTPUT SIGNAL-2
    1. Turn ignition switch OFF.
    2. Disconnect steering lock unit connector and IPDM E/R connector.
    3. Check voltage between steering lock unit harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      Steering lock unit
      Connector Terminal
      M40 8 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: GO TO 7.

  7. CHECK STEERING LOCK UNIT CIRCUIT-3
    1. Disconnect BCM connector.
    2. Check continuity between steering lock unit harness connector and BCM harness connector.
      CONTINUITY SPECIFICATION

      Steering lock unit BCM Continuity
      Connector Terminal Connector Terminal
      M40 8 M122 98 Existed
    3. Check continuity between steering lock unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Steering lock unit Ground Continuity
      Connector Terminal
      M40 8 Not existed

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  8. CHECK IPDM E/R OUTPUT SIGNAL-2
    1. Connect IPDM E/R connector.
    2. Disconnect BCM connector.
    3. Check voltage between steering lock unit harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      Steering lock unit
      Connector Terminal
      M40 8 Ground Battery voltage

      Is the inspection result normal? 

      YES: Replace steering lock unit.

      NO: GO TO 9.

  9. CHECK STEERING LOCK UNIT CIRCUIT-4
    1. Disconnect IPDM E/R connector.
    2. Check continuity between steering lock unit harness connector and IPDM E/R harness connector.
      CONTINUITY SPECIFICATION

      Steering lock unit IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M40 8 E5 33 Existed
    3. Check continuity between steering lock unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Steering lock unit Ground Continuity
      Connector Terminal
      M40 8 Not existed

      Is the inspection result normal? 

      YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

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