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Home >> Infiniti >> 2009 >> G37 Base, 4D Sedan >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Security Control System -- Convertible) >> DTC/Circuit Diagnosis >> DTC B210A: Steering Lock Unit >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  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 CHART

      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 CHART

      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 CHART

      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 CHART

      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 CHART

      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 CHART

      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 CHART

      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 CHART

      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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