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Nissan Sentra B18 (2020-2025) Service Manual / Driver Controls / Wiper & Washer :: Symptom Diagnosis

Nissan Sentra B18 (2020-2025) Service Manual: Wiper & Washer :: Symptom Diagnosis

Wiper and Washer System Symptoms. Symptom Table. Symptom Table

Symptom Table

Note:

Perform the self-diagnosis with CONSULT before the symptom diagnosis. Perform the trouble diagnosis if any DTC is detected.

Symptom

Possible cause

Inspection item

Front wiper does not operate

HI only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Front wiper motor

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. Front wiper motor (HI) circuit

    Refer to Component Function Check.

LO and INT

  • BCM

  • IPDM E/R

  • Front wiper motor

  • Harness between IPDM E/R and front wiper motor

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. Front wiper motor (LO) circuit

    Refer to Component Function Check.

LO only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. IPDM E/R

    Refer to Removal and Installation.

INT only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. IPDM E/R

    Refer to Removal and Installation.

HI, LO and INT

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Front wiper motor

  • Harness between combination switch (wiper and washer switch) and BCM

SYMPTOM DIAGNOSIS

Refer to Diagnosis Procedure.

Front wiper does not stop

HI only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Front wiper motor

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. Front wiper motor (HI) circuit

    Refer to Component Function Check.

LO only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. IPDM E/R

    Refer to Removal and Installation.

INT only

  • BCM

  • IPDM E/R

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

  1. Combination switch (wiper and washer switch)

    Refer to Symptom Table.

  2. IPDM E/R

    Refer to Removal and Installation.

Front wiper does not operate normally

Intermittent adjustment cannot be performed

  • BCM

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

Combination switch (wiper and washer switch)

Refer to Symptom Table.

Intermittent control linked with Nissan Sentra vehicle speed cannot be performed

  • Wiper INT operation setting

  • BCM

  1. Check the Wiper INT operation setting is linked with Nissan Sentra vehicle speed by combination meter.

  2. BCM

    Refer to Removal and Installation.

Wiper is not linked to the washer operation

  • BCM

  • Combination switch (wiper and washer switch)

  • Harness between combination switch (wiper and washer switch) and BCM

Combination switch (wiper and washer switch)

Refer to Symptom Table.

Does not return to stop position [Repeatedly operates for 10 seconds and then stops for 20 seconds. After that, it stops the operation. (Fail-safe)]

  • IPDM E/R

  • Front wiper motor

  • Harness between IPDM E/R and front wiper motor

Front wiper stop position signal circuit

Refer to Component Function Check.

Front washer does not operate normally

Does not operate

Combination switch (wiper and washer switch)

  1. Washer switch

    Refer to Component Inspection.

  2. Washer motor circuit

    Refer to Diagnosis Procedure.

Does not stop

Combination switch (wiper and washer switch)

Washer switch

Refer to Component Inspection.

Front Wiper Does Not Operate. Diagnosis Procedure. Diagnosis Procedure

Diagnosis Procedure

The front wiper does not operate under any operation conditions.

  1. CHECK WIPER RELAY OPERATION

    1. CONSULT

      1. Select “FRONT WIPER” in "Active Test" mode of "IPDM E/R".

      2. With operating the test item, check front wiper operation.

        Low

        : Front wiper (LO) operation

        High

        : Front wiper (HI) operation

        Off

        : Stop the front wiper

    Is front wiper operation normally?

    YES >>

    GO TO 4.

    NO >>

    GO TO 2.

  2. CHECK FRONT WIPER MOTOR FUSE

      1. Ignition switch OFF.

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

      Unit

      Location

      Fuse No.

      Capacity

      Front wiper motor

      IPDM E/R

      85

      30 A

    Is the fuse blown (open)?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 3.

  3. CHECK FRONT WIPER MOTOR GROUND CIRCUIT

    1. Check front wiper motor ground circuit. Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES >>

    Replace front wiper motor. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  4. CHECK FRONT WIPER REQUEST SIGNAL INPUT

    1. CONSULT

      1. Select “Front wiper” in "Data Monitor" mode of “IPDM E/R”.

      2. Switch the front wiper switch to HI and LO.

      3. With operating the front wiper switch, check the status of “FRONT WIPER”.

        Monitor item

        Condition

        Monitor status

        Front wiper

        Front wiper switch

        HI

        High

        LO

        Low

        INT

        OFF

        Stop

    Is the inspection result normal?

    YES >>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO >>

    GO TO 5.

  5. CHECK COMBINATION SWITCH (WIPER AND WASHER SWITCH)

    1. Perform the inspection of the combination switch (wiper and washer switch). Refer to Symptom Table.

    Is combination switch (wiper and washer switch) normal?

    YES>>

    Replace BCM. Refer to Removal and Installation.

    NO>>

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

Normal Operating Condition. Description. Description

Description

FRONT WIPER MOTOR PROTECTION FUNCTION

  • The IPDM E/R may stop the front wiper to protect the front wiper motor if any obstruction (operation resistance) such as a large amount of snow is detected during the front wiper operation.

  • At that time turn OFF the front wiper and remove the foreign object. Then wait for approximately 20 seconds or more and reactivate the front wiper. The wiper will operate normally.

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