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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 187 (Security Control System) >> DTC/Circuit Diagnosis >> DTC B2601: Shift Position >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan 370Z. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK A/T SHIFT SELECTOR POWER SUPPLY
    1. Turn ignition switch OFF.
    2. Disconnect A/T shift selector (detention switch) connector.
    3. Check voltage between A/T shift selector (detention switch) harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      A/T shift selector (detention switch)
      Connector Terminal
      M137 9 Ground Battery voltage

      Is the inspection result normal? 

      YES: Go to  3.

      NO: Go to 2.

  2. CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.
      CONTINUITY SPECIFICATION

      A/T shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 9 M122 96 Existed
    3. Check continuity between A/T shift selector (detention switch) harness connector and ground.
      CONTINUITY SPECIFICATION

      A/T shift selector (detention switch) Ground Continuity
      Connector Terminal
      M137 9 Not existed

      Is the inspection result normal? 

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

      NO: Repair or replace harness.

  3. CHECK A/T SHIFT SELECTOR CIRCUIT (BCM)
    1. Disconnect BCM connector and IPDM E/R connector.
    2. Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.
      CONTINUITY SPECIFICATION

      A/T shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 10 M122 99 Existed
    3. Check continuity between A/T shift selector (detention switch) harness connector and ground.
      CONTINUITY SPECIFICATION

      A/T shift selector (detention switch) Ground Continuity
      Connector Terminal
      M137 10 Not existed

      Is the inspection result normal? 

      YES: Go to 4.

      NO: Repair or replace harness.

  4. CHECK A/T SHIFT SELECTOR CIRCUIT (IPDM E/R)

    Check continuity between A/T shift selector (detention switch) harness connector and IPDM E/R harness connector.

    CONTINUITY SPECIFICATION

    A/T shift selector (detention switch) IPDM E/R Continuity
    Connector Terminal Connector Terminal
    M137 10 E6 43 Existed

    Is the inspection result normal? 

    YES: Go to 5.

    NO: Repair or replace harness.

  5. CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Go to 6.

    NO: Replace A/T shift selector. Refer to "REMOVAL AND INSTALLATION ".

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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