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Home >> Infiniti >> 2010 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Security Control System) >> With Intelligent Key System >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Juke. 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  8.

  2. CHECK FUSE
    1. Turn power switch OFF.
    2. Check that the following fuse in IPDM E/R is not blown.
      FUSE REFERENCE CHART

      Signal name Fuse No.
      Ignition power supply 56 (10 A)

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Replace the blown fuse after repairing the cause of blowing.

  3. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY
    1. Disconnect transmission range switch connector.
    2. Turn ignition switch ON.
    3. Check voltage between transmission range switch harness connector and ground.
      CONNECTOR TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V)
      Transmission range switch
      Connector Terminal
      F27 1 Ground 6 - 16

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between transmission range switch harness connector and IPDM E/R harness connector.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      Transmission range switch IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F27 1 E15 58 Existed

      Is the inspection result normal? 

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

      NO: Repair or replace harness.

  5. CHECK BCM INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Connect transmission range switch harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between BCM harness connector and ground.
      CONNECTOR TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Condition Voltage (V) (Approx.)
      BCM
      Connector Terminal
      M70 102 Ground Selector lever P or N position Battery voltage
      Other than above 0

      Is the inspection result normal? 

      YES: GO TO  13.

      NO: GO TO 6.

  6. CHECK BCM INPUT SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect transmission range switch connector.
    3. Disconnect BCM connector.
    4. Check continuity between transmission range switch harness connector and BCM harness connector.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      Transmission range switch BCM Continuity
      Connector Terminal Connector Terminal
      F27 2 M70 102 Existed

      Is the inspection result normal? 

      YES: GO TO 7.

      NO: Repair or replace harness.

  7. CHECK TRANSMISSION RANGE SWITCH

    Refer to , "COMPONENT INSPECTION (TRANSMISSION RANGE SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO  12.

    NO: Replace transmission range switch. Refer to "REMOVAL AND INSTALLATION ".

  8. CHECK CVT SHIFT SELECTOR POWER SUPPLY
    1. Turn ignition switch OFF.
    2. Disconnect CVT shift selector (detention switch) connector.
    3. Check voltage between CVT shift selector (detention switch) harness connector and ground.
      CONNECTOR TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      CVT shift selector (detention switch)
      Connector Terminal
      M57 12 Ground 12

      Is the inspection result normal? 

      YES: GO TO  10.

      NO: GO TO 9.

  9. CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between CVT shift selector (detention switch) harness connector and BCM harness connector.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      CVT shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M57 12 M70 104 Existed
    3. Check continuity between CVT shift selector (detention switch) harness connector and ground.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      CVT shift selector (detention switch) Ground Continuity
      Connector Terminal
      M57 12 Not existed

      Is the inspection result normal? 

      YES: GO TO  12.

      NO: Repair or replace harness.

  10. CHECK CVT SHIFT SELECTOR CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between CVT shift selector (detention switch) harness connector and BCM harness connector.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      CVT shift selector (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M57 13 M68 37 Existed
    3. Check continuity between CVT shift selector (detention switch) harness connector and ground.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      CVT shift selector (detention switch) Ground Continuity
      Connector Terminal
      M57 13 Not existed

      Is the inspection result normal? 

      YES: GO TO 11.

      NO: Repair or replace harness.

  11. CHECK CVT SHIFT SELECTOR (DETENTION SWITCH)

    Refer to , "COMPONENT INSPECTION [CVT SHIFT SELECTOR (DETENTION SWITCH)] ".

    Is the inspection result normal? 

    YES: GO TO  13.

    NO: Replace CVT shift selector. Refer to "REMOVAL AND INSTALLATION ".

  12. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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

      For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

      INSPECTION END

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