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

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

Diagnosis Procedure

CHECK FRONT WIPER MOTOR (LO) OUTPUT VOLTAGE

Ignition switch OFF.
Disconnect front wiper motor connector.
Ignition switch ON.
Select “FRONT WIPER” in "Active Test" mode of “IPDM E/R”.
With operating the test item, check voltage between front wiper motor harness connector and ground.

(+)	(−)	Condition	Voltage (Approx.)
E1	1	Ground	FRONT WIPER	Low	Battery voltage (10 seconds*)

(+)

(−)

Condition

Voltage

(Approx.)

Front wiper motor

Connector

Terminal

Ground

FRONT WIPER

Low

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.

CHECK FRONT WIPER MOTOR (LO) CIRCUIT

Ignition switch OFF.
Disconnect IPDM E/R connector.

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	Continuity
E45	48	E1	1	Yes

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

IPDM E/R		(−)	Continuity
Connector	Terminal	(−)	Continuity
E45	48	Ground	No

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

Component Function Check

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