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Home >> Infiniti >> 2013 >> EX37 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position Status >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DTC WITH TCM 

    Check "Self diagnostic result" with CONSULT. Refer to "DTC INDEX ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace the malfunctioning parts.

  2. CHECK TRANSMISSION RANGE SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector and BCM connector.
    3. Check continuity between TCM harness connector and BCM harness connector.
      TCM BCM Continuity
      Connector Terminal Connector Terminal
      F51 9 M123 140 Existed
    4. Check continuity between TCM harness connector and ground.
      TCM Ground Continuity
      Connector Terminal
      F51 9 Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness or connector.

  3. CHECK A/T SHIFT SELECTOR POWER SUPPLY 
    1. Disconnect A/T shift selector (detention switch) connector.
    2. 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 10 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. 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 10 M122 96 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 10 Not existed

      Is the inspection result normal? 

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

      NO: Repair or replace harness or connector.

  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 11 M122 99 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 11 Not existed

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace harness or connector.

  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 "REMOVAL AND INSTALLATION ".

  7. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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