(1)Front washer motor / rear washer motor
Fill the washer tank in the engine room with washer fluid.
The washer tank is made from translucent resin and the washer fluid is injected by operating the washer motor inside the tank.
The washer motor has an impeller (vane wheel) type, used also in the fuel pump.
There are two types of systems for the vehicles with the rear washer: one in which one washer tank is used for both the front washer system and the rear washer system, and another in which there are two washer tanks for each of the front and rear washer systems.
Also, there is one type that switches the washer nozzle for front/rear by valves using a washer motor, and there is another type that has two motors for each of the front/rear washer in one washer tank.
A type of wiper and washer system operates the wiper automatically when injecting the washer fluid after operating the washer switch for a specified time. This is called the “washer-linked function.”
The washer-linked function is a function to wipe off the injected washer fluid on the windshield glass.
1.Wiper switch turned LOW / MIST operation
When the wiper switch is moved to the low-speed position or to mist position, current flows to the low-speed brush of the wiper motor (hereafter abbreviated as “LO”) as shown in the illustration, and the wipers operate at low speed.
2.Wiper switch turned HIGH operation
When the wiper switch is moved to the high-speed position, current flows to the high-speed brush of the wiper motor (HI) as shown in the illustration, and the wipers operate at high speed.
3.Wiper switch turned OFF operation
If the wiper switch is turned off while the wiper motor is operating, current flows to the low-speed brush of the wiper motor as shown in the illustration, and the wipers operate at low-speed. When the wipers reach the stop position, the cam switch point switches from the P3 side to the P2 side and the motor stops.
If the cam switch in the wiper motor becomes damaged and the wiring connecting the wiper switch and cam switch opens, the following symptoms will occur:
When cam switch is damaged
If contact point P3 is damaged while the wiper motor is operating, contact point P1 will have no continuity with contact point P3 when the wiper switch is off. As a result, the electric brake will not apply to the wiper motor and the wiper motor cannot stop at the specified position, causing the wiper motor to continue turning.
When the wiring between wiper switch terminal 4 and the wiper motor opens
Normally, when the wiper switch is turned to the OFF position, the wiper blade operates until the stopping position, but if the wiring between wiper switch terminal 4 and the wiper motor opens, the wiper blade does not reach the stopping position but stops instantly at the position when the switch is turned off