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Home >> Infiniti >> 2014 >> QX60 Base, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Door & Lock (Except Hybrid) >> DTC/Circuit Diagnosis >> DTC B26FD: Shift Lock Solenoid >> Diagnosis Procedure

Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK POWER SOURCE (STOP LAMP SWITCH) 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch connector.
    3. Check voltage between stop lamp switch connector E38 terminal 1 and ground.
      Stop lamp switch Ground Voltage (Approx.)
      Connector Terminal
      E38 1 Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Check the following:

      • Harness for short or open between fuse block (J/B) and stop lamp switch
      • 10A fuse (No. 10, located in fuse block [J/B])
  2. CHECK STOP LAMP SWITCH 

    Check stop lamp switch. Refer to "COMPONENT INSPECTION (STOP LAMP SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Replace stop lamp switch. Refer to "EXPLODED VIEW ".

  3. CHECK GROUND CIRCUIT (BCM) 
    1. Disconnect BCM connector M81.
    2. Check continuity between BCM connector M81 terminals 134, 143 and ground.
      BCM Ground Continuity
      Connector Terminal (+)
      M81 134 Yes
      143

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair or replace damaged parts.

  4. CHECK HARNESS BETWEEN BCM AND STOP LAMP SWITCH FOR OPEN 
    1. Disconnect BCM connector M18.
    2. Check continuity between BCM connector M18 terminal 27 and stop lamp switch connector E38 terminal 2.
      BCM Stop lamp switch Continuity
      Connector Terminal Connector Terminal
      M18 27 E38 2 Yes

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace damaged parts.

  5. CHECK HARNESS BETWEEN BCM AND STOP LAMP SWITCH FOR SHORT CIRCUIT 

    Check continuity between BCM connector M18 terminal 27 and ground.

    BCM Ground Continuity
    Connector Terminal
    M18 27 No

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Repair or replace damaged parts.

  6. CHECK HARNESS BETWEEN BCM AND CVT SHIFT SELECTOR FOR OPEN 
    1. Disconnect CVT shift selector connector M78 and BCM connector M80.
    2. Check continuity between BCM connector M80 terminal 108 and CVT shift selector connector M78 terminal 3.
      BCM CVT shift selector Continuity
      Connector Terminal Connector Terminal
      M80 108 M78 3 Yes

      Is the inspection result normal? 

      YES: GO TO 7.

      NO: Repair or replace damaged parts.

  7. CHECK HARNESS BETWEEN BCM AND CVT SHIFT SELECTOR FOR SHORT CIRCUIT 

    Check continuity between BCM connector M80 terminal 108 and ground.

    BCM Ground Continuity
    Connector Terminal
    M80 108 No

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Repair or replace damaged parts.

  8. CHECK GROUND CIRCUIT (CVT SHIFT SELECTOR) 

    Check continuity between CVT shift selector connector M78 terminal 4 and ground.

    CVT shift selector Ground Continuity
    Connector Terminal
    M78 4 Yes

    Is the inspection result normal? 

    YES: Replace shift lock solenoid. Refer to "EXPLODED VIEW ".

    NO: Repair or replace damaged parts.