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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Security Control System) >> DTC/Circuit Diagnosis >> DTC B2602: Shift Position >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OF COMBINATION METER 

    Check DTC in "Self Diagnostic Result" mode of "METER/M&A" using CONSULT.

    Is DTC detected? 

    YES: Perform the trouble diagnosis related to the detected DTC. Refer to "DTC INDEX ".

    NO: GO TO 2.

  2. 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 (V) (Approx.)
      A/T shift selector (detention switch)
      Connector Terminal
      M137 7 Ground 12

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 3.

  3. 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.
      A/T shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 7 M123 104 Existed
    3. Check continuity between A/T shift selector (detention switch) harness connector and ground.
      A/T shift selector (detention switch) Ground Continuity
      Connector Terminal
      M137 7 Not existed

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair or replace harness.

  4. REPLACE BCM 
    1. Replace BCM. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

      : INSPECTION END

  5. CHECK A/T SHIFT SELECTOR CIRCUIT 
    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.
      A/T shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 8 M120 37 Existed
    3. Check continuity between A/T shift selector (detention switch) harness connector and ground.
      A/T shift selector (detention switch) Ground Continuity
      Connector Terminal
      M137 8 Not existed

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace harness.

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

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace A/T shift selector. Refer to "2WD: REMOVAL AND INSTALLATION " (2WD), "AWD: REMOVAL AND INSTALLATION " (AWD).

  7. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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