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DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

The door lock assembly detects condition of the key cylinder switch and transmits to BCM as the LOCK or UNLOCK signal.

  1. CHECK DOOR KEY CYLINDER SWITCH 

    SYMBOL With CONSULT

    Check suspect door lock assembly (key cylinder switch) KEY CYL LK-SW and KEY CYL UN-SW in DATA MONITOR mode with CONSULT.

    • When key inserted in suspect key cylinder is turned to LOCK:

    KEY CYL LK-SW

    : ON
    • When key inserted in suspect key cylinder is turned to UNLOCK:

    KEY CYL UN-SW

    : ON

    Is the inspection result normal?

    YES

    Key cylinder switch signal is OK.

    NO

    GO TO 2.

  2. CHECK DOOR KEY CYLINDER SWITCH GROUND HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect suspect door lock assembly (key cylinder switch).
    3. With sliding door in the closed position, check continuity between door lock assembly (key cylinder switch) connector D14 terminal 4, D303 terminal 3 or D609 terminal 3 and body ground.

    Item

    Connector

    Condition

    Terminals

    Continuity

    Front door lock assembly LH

    D14

    Sliding door closed

    4 - Ground

    Yes

    Sliding door lock assembly

    D303

    3 - Ground

    Back door lock assembly

    D609

    3 - Ground

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace harness.

  3. CHECK DOOR KEY CYLINDER SWITCH 

    Check continuity between suspect door lock assembly (key cylinder switch) terminals.

    Item

    Terminals

    Condition

    Continuity

    Front door lock assembly LH

    5 - 4

    Key is turned to UNLOCK.

    Yes

    Key is turned to LOCK or neutral.

    No

    6 - 4

    Key is turned to LOCK.

    Yes

    Key is turned to UNLOCK or neutral.

    No

    Sliding door lock assembly

    4 - 3

    Key is turned to UNLOCK.

    Yes

    Key is turned to LOCK or neutral.

    No

    2 - 3

    Key is turned to LOCK.

    Yes

    Key is turned to UNLOCK or neutral.

    No

    Back door lock assembly

    2 - 3

    Key is turned to UNLOCK.

    Yes

    Key is turned to LOCK or neutral.

    No

    4 - 3

    Key is turned to LOCK.

    Yes

    Key is turned to UNLOCK or neutral.

    No

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Replace door lock assembly (key cylinder switch). Refer to Removal and Installation (front LH), Removal and Installation (sliding), Removal and Installation (back).

  4. CHECK DOOR KEY CYLINDER HARNESS 
    1. Disconnect BCM connector M18.
    2. Check continuity between BCM connector M18 terminals 7, 8 and suspect door lock assembly (key cylinder switch) connector D14 terminals 5, 6, D303 terminals 4, 2 or D609 terminals 2, 4.

      Connector

      Terminals

      Connector

      Terminals

      Continuity

      BCM M18

      7

      Front door lock assembly LH (key cylinder switch) D14

      5

      Yes

      8

      6

      7

      Sliding door lock assembly (key cylinder switch) D303

      4

      8

      2

      7

      Back door lock assembly (key cylinder switch) D609

      2

      8

      4
    3. Check continuity between BCM connector M18 terminals 7, 8 and ground.

      Connector

      Terminals

      Ground

      Continuity

      BCM M18

      7

      No

      8

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness.

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