Wiper and Washer Systems: Description and Operation

With the ignition SW turned on, the current flows to TERMINAL 17 of the wiper and washer SW, and TERMINAL 6 of the wiper motor through the WIPER fuse, TERMINAL 2 of washer motor through the WASHER fuse.

1. LOW SPEED POSITION
With the wiper SW turned to LOW position, the current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL (A) 6 of the body ECU to TERMINAL (A) 9 to TERMINAL 3 of the wiper motor to wiper motor to TERMINAL 1 to GROUND, causing the wiper motor to run at low speed.

2. HIGH SPEED POSITION
With the wiper SW turned to HIGH position, the current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 1 to TERMINAL (A) 7 of the body ECU to TERMINAL (A) 1 to TERMINAL 2 of the wiper motor to wiper motor to TERMINAL 1 to GROUND, causing the wiper motor to run at high speed.

3. INT POSITION
With the wiper SW turned to INT position, the relay operates and the current which is connected by relay function flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 2 to GROUND. This operates the intermittent circuit and the current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 4 to TERMINAL (A) 17 of the body ECU to TERMINAL (A) 9 to TERMINAL 3 of the wiper motor to wiper motor to TERMINAL 1 to GROUND, and operates the wiper.
The intermittent operation is controlled by the charge/discharge function of the condenser installed in the relay, and the intermittent time is controlled by a time control SW to change the charging time of the condenser

4. MIST POSITION
With the wiper SW turned to MIST position, the current flows from TERMINAL 17 of the wiper and washer SW to wiper mist SW to TERMINAL 2 to GROUND, and current flows from TERMINAL 17 to TERMINAL 7 to TERMINAL (A) 6 of the body ECU to TERMINAL (A) 9 to TERMINAL 3 of the wiper motor to wiper motor to TERMINAL 1 to GROUND, causing the wiper motor to run at low speed.

5. WASHER CONTINUITY OPERATION
With the washer SW pushed to on, current flows from TERMINAL 2 of the washer motor to TERMINAL 1 to TERMINAL 11 of the wiper and washer SW to TERMINAL 2 to GROUND, causing the washer motor to run, and the window washer emits a water spray. This causes current to flow to washer continuity operation circuit in TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL (A) 6 of the body ECU to TERMINAL (A) 9 to TERMINAL 3 of the wiper motor to wiper motor to TERMINAL 1 to GROUND, operating the wiper.