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Nissan Sentra B18 (2020-2025) Service Manual: Door Lock and Unlock Switch

Driver Side

Component Function Check

Component Function Check

  1. CHECK FUNCTION

    1. CONSULT

      1. Ignition switch ON.

      2. Select ″CDL LOCK SW″, ″CDL UNLOCK SW″ in ″Data Monitor″ mode of "BCM(BATTERY SAVER)".

      3. Check that the function operates normally according to the following conditions:

      Monitor item

      Condition

      Status

      CDL LOCK SW

      Door lock and unlock switch (driver door)

      LOCK

      On

      UNLOCK

      Off

      CDL UNLOCK SW

      LOCK

      Off

      UNLOCK

      On

    Is the inspection result normal?

    YES>>

    Door lock and unlock switch (driver door) is OK.

    NO>>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DOOR LOCK AND UNLOCK SWITCH INPUT SIGNAL

      1. Ignition switch OFF.

      2. Disconnect main power window and door lock/unlock switch connector.

      3. Check voltage between main power window and door lock/unlock switch harness connector and ground.

        (+)

        (–)

        Voltage

        (Approx.)

        Main power window and door lock/unlock switch

        Connector

        Terminal

        D5

        8

        Ground

        Battery voltage

        9

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    GO TO 2.

  2. CHECK DOOR LOCK ACTUATOR CIRCUIT

      1. Disconnect BCM connector.

      2. Check continuity between BCM harness connector and main power window and door lock/unlock switch harness connector.

        BCM

        Main power window and door lock/unlock switch

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M84

        11

        D5

        8

        Yes

        14

        9

      3. Check continuity between BCM harness connector and ground.

        BCM

        —

        Continuity

        Connector

        Terminal

        M84

        11

        Ground

        No

        14

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  3. CHECK DOOR LOCK AND UNLOCK SWITCH GROUND

    1. Check continuity between main power window and door lock/unlock switch harness connector and ground.

      Main power window and door lock/unlock switch

      —

      Continuity

      Connector

      Terminal

      D5

      13

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness.

  4. CHECK DOOR LOCK AND UNLOCK SWITCH

    1. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Replace main power window and door lock/unlock switch. Refer to Removal and Installation.

  5. CHECK INTERMITTENT INCIDENT

    1. Refer to Intermittent Incident.

    >>

    Inspection End.

Component Inspection

Component Inspection

  1. CHECK DOOR LOCK AND UNLOCK SWITCH

      1. Ignition switch OFF.

      2. Disconnect main power window and door lock/unlock switch connector.

      3. Check continuity between main power window and door lock/unlock switch terminals.

      Main power window and door lock/unlock switch

      Condition

      Continuity

      Terminals

      8

      13

      Door lock and unlock switch

      LOCK

      Yes

      UNLOCK

      No

      9

      LOCK

      No

      UNLOCK

      Yes

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Replace main power window and door lock/unlock switch. Refer to Removal and Installation.

Passenger Side

Component Function Check

Component Function Check

  1. CHECK FUNCTION

    1. CONSULT

      1. Ignition switch ON.

      2. Select ″CDL LOCK SW″, ″CDL UNLOCK SW″ in ″Data Monitor″ mode of "BCM(BATTERY SAVER)".

      3. Check that the function operates normally according to the following conditions:

      Monitor item

      Condition

      Status

      CDL LOCK SW

      Door lock and unlock switch (passenger door)

      LOCK

      On

      UNLOCK

      Off

      CDL UNLOCK SW

      LOCK

      Off

      UNLOCK

      On

    Is the inspection result normal?

    YES >>

    Door lock and unlock switch (passenger door) is OK.

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DOOR LOCK AND UNLOCK SWITCH INPUT SIGNAL

      1. Ignition switch OFF.

      2. Disconnect power window and door lock/unlock switch RH connector.

      3. Check voltage between power window and door lock/unlock switch RH harness connector and ground.

        (+)

        (–)

        Voltage

        (Approx.)

        Power window and door lock/unlock switch RH

        Connector

        Terminal

        D104

        1

        Ground

        Battery voltage

        2

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK DOOR LOCK ACTUATOR CIRCUIT

      1. Disconnect BCM connector.

      2. Check continuity between BCM harness connector and power window and door lock/unlock switch RH harness connector.

        BCM

        Power window and door lock/unlock switch RH

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M84

        11

        D104

        1

        Yes

        14

        2

      3. Check continuity between BCM harness connector and ground.

        BCM

        —

        Continuity

        Connector

        Terminal

        M84

        11

        Ground

        No

        14

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  3. CHECK DOOR LOCK AND UNLOCK SWITCH GROUND

    1. Check continuity between power window and door lock/unlock switch RH harness connector and ground.

      Power window and door lock/unlock switch RH

      —

      Continuity

      Connector

      Terminal

      D104

      3

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness.

  4. CHECK DOOR LOCK AND UNLOCK SWITCH

    1. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Replace power window and door lock/unlock switch RH. Refer to Removal and Installation.

  5. CHECK INTERMITTENT INCIDENT

    1. Refer to Intermittent Incident.

    >>

    Inspection End.

Component Inspection

Component Inspection

  1. CHECK DOOR LOCK AND UNLOCK SWITCH

      1. Ignition switch OFF.

      2. Disconnect power window and door lock/unlock switch RH connector.

      3. Check continuity between power window and door lock/unlock switch RH terminals.

      Power window and door lock/unlock switch RH

      Condition

      Continuity

      Terminals

      1

      3

      Door lock and unlock switch

      LOCK

      Yes

      UNLOCK

      No

      2

      LOCK

      No

      UNLOCK

      Yes

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Replace power window and door lock/unlock switch RH. Refer to Removal and Installation.

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