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Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit

Main Power Window and Door Lock/unlock Switch

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that any of the following fuses are not blown (open):

        Signal name

        Fuse No.

        Capacity

        Ignition power supply

        52

        20 A

        53

        30 A

    Is the fuse blown (open)?

    YES >>

    Repair the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

    NO >>

    GO TO 2.

  2. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY

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

      2. Ignition switch ON.

      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

        11

        Ground

        Battery voltage

        12

    Is the inspection result normal?

    YES >>

    GO TO 7.

    NO >>

    GO TO 3.

  3. CHECK POWER WINDOW RELAY POWER SUPPLY

      1. Ignition switch OFF.

      2. Remove power window relay.

      3. Check voltage between fuse block (J/B) harness connector and ground.

        (+)

        (–)

        Voltage

        (Approx.)

        Fuse block (J/B)

        Terminal

        Power window relay

        1

        Ground

        Battery voltage

        5

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness.

  4. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY CIRCUIT

    1. Check continuity between fuse block (J/B) harness connector and main power window and door lock/unlock switch harness connector.

      Fuse block (J/B)

      Main power window and door lock/unlock switch

      Continuity

      Terminal

      connector

      Terminal

      Power window relay

      3

      D5

      11

      Yes

      12

    Is the inspection result normal?

    YES >>

    GO TO 5

    NO >>

    Repair or replace harness.

  5. CHECK POWER WINDOW RELAY CONTROL CIRCUIT

      1. Disconnect BCM connector.

      2. Check continuity between BCM harness connector and fuse block (J/B) harness connector.

        BCM

        Fuse block (J/B)

        Continuity

        Connector

        Terminal

        Terminal

        M84

        32

        Power window relay

        2

        Yes

      3. Check continuity between BCM harness connector and ground.

        BCM

        —

        Continuity

        Connector

        Terminal

        M84

        32

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair or replace harness.

  6. CHECK POWER WINDOW RELAY

    1. Check power window relay.

      Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    Replace power window relay.

  7. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH GROUND CIRCUIT

      1. Ignition switch OFF.

      2. 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 >>

    Inspection End.

    NO >>

    Repair or replace harness.

Power Window and Door Lock/unlock Switch Rh

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that the following fuse is not blown (open):

        Signal name

        Fuse No.

        Capacity

        Ignition power supply

        52

        20 A

    Is the fuse blown (open)?

    YES>>

    Repair the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

    NO>>

    GO TO 2.

  2. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH POWER SUPPLY

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

      2. Ignition switch ON.

      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

      8

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace harness.

  3. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH GROUND

      1. Ignition switch OFF.

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

      (+)

      (–)

      Continuity

      Power window and door lock/unlock switch RH

      Connector

      Terminal

      D104

      3

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Repair or replace harness.

Rear Power Window Switch

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that the following is not blown (open):

        Signal name

        Fuse No.

        Capacity

        Ignition power supply

        53

        30 A

    Is the inspection result normal?

    YES >>

    Repair the blown (open) fuse repairing the affected circuit if a fuse blown (open).

    NO >>

    GO TO 2.

  2. CHECK REAR POWER WINDOW SWITCH POWER SUPPLY

      1. Disconnect rear power window switch connector.

      2. Ignition switch ON.

      3. Check voltage between rear power window switch harness connector and ground.

        (+)

        (-)

        Voltage

        (Approx.)

        Rear power window switch

        Connector

        Terminal

        LH

        D203

        6

        Ground

        Battery voltage

        RH

        D303

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Repair or replace harness.

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