Nissan Sentra B18 (2020-2025) Service Manual: 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. 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.

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