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

Diagnosis Procedure

1. CHECK FRONT WIPER MOTOR (HI) OUTPUT VOLTAGE

   1. CONSULT

      1. Ignition switch OFF.

      2. Disconnect front wiper motor connector.

      3. Ignition switch ON.

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

      5. With operating the test item, check voltage between front wiper motor harness connector and ground.

      (+)		(−)	Condition		Voltage (Approx.)
      Front wiper motor
      Connector	Terminal
      E1	4	Ground	FRONT WIPER	High	Battery voltage (10 seconds*)

      *: According to front wiper protection function, the IPDM E/R supplies voltage for 10 seconds (9 − 16 V) and then stops for 20 seconds (0 − 1 V). This operation occurs repeatedly.

   Is the inspection result normal?

   YES >>

   Replace front wiper motor. Refer to Removal and Installation.

   NO >>

   GO TO 2.

2. CHECK FRONT WIPER MOTOR (HI) CIRCUIT

   1. 1. Ignition switch OFF.

      2. Disconnect IPDM E/R connector.

      3. Check continuity between IPDM E/R harness connector and front wiper motor harness connector.

         IPDM E/R		Front wiper motor		Continuity
         Connector	Terminal	Connector	Terminal
         E45	45	E1	4	Yes

      4. Check continuity between IPDM E/R harness connector and ground.

         IPDM E/R		(−)	Continuity
         Connector	Terminal
         E45	45	Ground	No

   Is the inspection result normal?

   YES >>

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

   NO >>

   Repair or replace harness.

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