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Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Driver Controls / Wiper & Washer :: Dtc/circuit Diagnosis / Front Washer Motor Circuit / Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FRONT WASHER MOTOR FUSE

      1. Ignition switch OFF.

      2. Check that the following fuse is not blown:

      Unit

      Location

      Fuse No.

      Capacity

      Front washer motor

      Fuse block (J/B)

      45

      10 A

    Is the fuse blown?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 2.

  2. CHECK FRONT WASHER MOTOR POWER SUPPLY

      1. Disconnect front washer motor.

      2. Ignition switch ON.

      3. Check voltage between front washer motor harness connector and ground.

      (+)

      (–)

      Voltage

      (Approx.)

      Front washer motor

      Connector

      Terminal

      E8

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace the harness or connectors.

  3. CHECK FRONT WASHER MOTOR CIRCUIT CONTINUITY

      1. Ignition switch OFF.

      2. Disconnect combination switch (wiper and washer switch) connector.

      3. Check continuity between combination switch (wiper and washer switch) harness connector and front washer motor harness connector.

      Combination switch (wiper and washer switch)

      Front washer motor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M28

      16

      E8

      2

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace the harness or connectors.

  4. CHECK COMBINATION SWITCH (WIPER AND WASHER SWITCH) GROUND CIRCUIT

    1. Check continuity between combination switch (wiper and washer switch) harness connector and ground.

      Combination switch (wiper and washer switch)

      (–)

      Continuity

      Connector

      Terminal

      M28

      9

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace the harness or connectors.

  5. CHECK COMBINATION SWITCH (WIPER AND WASHER SWITCH)

    1. Check combination switch (wiper and washer switch). Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    Replace front washer motor. Refer to Removal and Installation.

    NO >>

    Replace combination switch (wiper and washer switch). Refer to Removal and Installation.

Front Washer Motor Circuit
...

Washer Switch
...

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