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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Automatic Transmission) >> DTC/Circuit Diagnosis >> Selector Lever Position Indicator >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MALFUNCTIONING ITEM 

    Which item is abnormal? 

    Position indicator lamp: GO TO 2.

    Illumination lamp: GO TO  11.

  2. CHECK POWER SOURCE 
    1. Turn ignition switch OFF.
    2. Disconnect A/T shift selector connector.
    3. Turn ignition switch ON.
    4. Check voltage between A/T shift selector vehicle side harness connector terminals.
      A/T shift selector vehicle side harness connector Ground Voltage (Approx.)
      Connector Terminal
      M137 10 Battery voltage

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: GO TO  8.

  3. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check continuity between A/T shift selector vehicle side harness connector terminal and ground.
      A/T shift selector vehicle side harness connector Ground Continuity
      Connector Terminal
      M137 4 Existed

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair or replace damaged parts.

  4. CHECK SHIFT POSITION SWITCH 
    1. Disconnect shift position switch connector.
    2. Check continuity between A/T shift selector harness connector terminals and shift position switch connector terminals.
      A/T shift selector harness connector Shift position switch connector Condition Continuity
      Connector Terminal Connector Terminal
      M137 4 M221 7 Selector lever in "D" position. Existed
      2, 3, 4, 5, 6, 9, 10, 11 No existed
      9 Selector lever in "M" position. Existed
      2, 3, 4, 5, 6, 7, 10, 11 No existed
      10 2, 6 Selector lever in "N" and "M" position. Existed
      3, 4, 5, 7, 9, 10, 11 No existed
      3, 6 Selector lever in "D" position. Existed
      2, 4, 5, 7, 9, 10, 11 No existed
      4, 6 Selector lever in "R" position. Existed
      2, 3, 5, 7, 9, 10, 11 No existed
      5, 6 Selector lever in "P" position. Existed
      2, 3, 4, 7, 9, 10, 11 No existed

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace damaged parts. Refer to "EXPLODED VIEW ".

  5. CHECK HARNESS BETWEEN SHIFT POSITION SWITCH AND SELECTOR LEVER POSITION INDICATOR (PART 1) 
    1. Disconnect selector lever position indicator connector.
    2. Check continuity between shift position switch harness connector terminals and selector lever position indicator connector terminals.
      Shift position switch harness connector Selector lever position indicator harness connector Continuity
      Connector Terminal Connector Terminal
      M221 2 M223 3 Existed
      3 4
      4 5
      5 7
      6 6
      7 8
      9 2

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace damaged parts. Refer to "EXPLODED VIEW ".

  6. CHECK HARNESS BETWEEN SHIFT POSITION SWITCH AND SELECTOR LEVER POSITION INDICATOR (PART 2) 

    Check harness cladding between shift position switch connector and selector lever position indicator connector for damage.

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Repair or replace damaged parts. Refer to "EXPLODED VIEW ".

  7. CHECK SELECTOR LEVER POSITION INDICATOR 

    Check selector lever position indicator. Refer to "COMPONENT INSPECTION (SELECTOR LEVER POSITION INDICATOR) ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Replace damaged parts.

  8. CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND BCM (PART 1) 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check continuity between A/T shift selector vehicle side harness connector terminal and BCM vehicle side harness connector terminal.
      A/T shift selector vehicle side harness connector BCM vehicle side harness connector Continuity
      Connector Terminal Connector Terminal
      M137 10 M122 96 Existed

      Is the inspection result normal? 

      YES: GO TO 9.

      NO: Repair or replace damaged parts.

  9. CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND BCM (PART 2) 

    Check continuity between A/T shift selector vehicle side harness connector terminal and ground.

    A/T shift selector vehicle side harness connector Ground Continuity
    Connector Terminal
    M137 10 Not existed

    Is the inspection result normal? 

    YES: GO TO 10.

    NO: Repair or replace damaged parts.

  10. CHECK BCM INPUT/OUTPUT SIGNAL 

    Check BCM input/output signal. Refer to "REFERENCE VALUE ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Repair or replace damaged parts.

  11. CHECK POWER SOURCE 
    1. Turn ignition switch OFF.
    2. Disconnect A/T shift selector connector.
    3. Turn ignition switch ON.
    4. Check voltage between A/T shift selector vehicle side harness connector terminals.
      A/T shift selector vehicle side harness connector Condition Voltage (Approx.)
      Connector Terminal
      + -
      M137 7 9 Lighting switch 1ST Battery voltage

      Is the inspection result normal? 

      YES: GO TO 12.

      NO: Check illumination circuit. Refer to "WIRING DIAGRAM - ILLUMINATION - ".

  12. CHECK SHIFT POSITION SWITCH 
    1. Disconnect shift position switch connector.
    2. Check continuity between A/T shift selector harness connector terminals and shift position switch connector terminals.
      A/T shift selector harness connector Shift position switch connector Continuity
      Connector Terminal Connector Terminal
      M137 7 M221 10 Existed
      2, 3, 4, 5, 6, 7, 9, 11 No existed
      9 11 Existed
      2, 3, 4, 5, 6, 7, 9, 10 No existed

      Is the inspection result normal? 

      YES: GO TO 13.

      NO: Repair or replace damaged parts. Refer to "EXPLODED VIEW ".

  13. CHECK HARNESS BETWEEN SHIFT POSITION SWITCH AND SELECTOR LEVER POSITION INDICATOR (PART 3) 
    1. Disconnect selector lever position indicator connector.
    2. Check continuity between shift position switch harness connector terminals and selector lever position indicator connector terminals.
      Shift position switch harness connector Selector lever position indicator harness connector Continuity
      Connector Terminal Connector Terminal
      M221 10 M223 1 Existed
      11 9

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: Repair or replace damaged parts. Refer to "EXPLODED VIEW ".

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