Nissan Sentra B18 (2020-2025) Service Manual: Front Wiper and Washer System

Component Parts Location

Component Parts Location

A.	Right front of engine compartment (view with washer tank removed)

No.	Component	Function
1.	Combination switch (wiper and washer switch)	Inputs the combination switch (wiper and washer switch) signal to the BCM. Refer to Wiper and Washer Switch.
2.	ABS actuator and electric unit (control unit) [Anti-lock Braking System actuator and electric unit (control unit)]	Inputs the Nissan Sentra vehicle speed signal via CAN communication. Refer to Component Parts Location for detailed component location.
3.	IPDM E/R (Intelligent Power Distribution Module Engine Room)	Controls the integrated relays according to the request from the BCM via CAN communication . Performs the auto stop control of the front wiper. Refer to System Description.
4.	Front wiper motor	Refer to Front Wiper Motor.
5.	BCM (Body Control Module)	Judges the switch status by the combination switch reading function. Requests the front wiper relay and the front wiper high relay ON to the IPDM E/R via CAN communication. Refer to System Description.
6.	Washer fluid level switch (if so equipped)	Refer to Washer Fluid Level Switch.
7.	Front washer motor	Refer to Front Washer Motor.

Wiper and Washer Switch

Wiper and Washer Switch

• Wiper and washer switch (1) is integrated with the combination switch (wiper and washer switch).

  

• The wiper switch transmits the wiper switch status signals to the BCM.

• The BCM transmits the wiper switch status signal request to the IPDM E/R via CAN communication for wiper motor operation.

• The washer switch supplies ignition power supply to the front washer motor to operate the washer pump.

• The front washer motor is grounded through the combination switch (wiper and washer switch) while the washer switch is ON.

Front Wiper Motor

Front Wiper Motor

• The front wiper motor is installed in the cowl on the linkage assembly.

  

• Controls front wiper operation with IPDM E/R control.

• Transmits front wiper stop position signal to the IPDM E/R.

• When power is supplied to the HI terminal of the front wiper motor HI mode operates.

• When power supply is supplied to the LO terminal of the front wiper motor LO operates.

• When the front wiper motor is at the stop position, two points of contact in the front wiper motor are connected, and the front wiper stop position signal is grounded.

  

• When the front wiper motor operates, two points of contact in the front wiper motor are not connected, and the front wiper stop position signal is not grounded.

• The IPDM E/R detects the front wiper stop position signal from the front wiper motor to find out the front wiper motor position (stop position/except stop position).

  

Front Washer Motor

Front Washer Motor

• The front washer motor is installed on the washer tank assembly in the right front of the engine compartment.

  

• Front washer motor operates the front washer.

• Front washer motor spray washer fluid depending on the state of the washer switch.

Washer Fluid Level Switch

Washer Fluid Level Switch

• The washer fluid level switch 1 is installed on the washer tank assembly in the RH of the engine compartment.

  

• Detects that washer fluid level is low and transmits washer level signal to combination meter.