Wiper and Washer Systems: Description and Operation

SYSTEM OUTLINE

FRONT WIPER AND WASHER

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

1. LOW SPEED POSITION
With wiper SW turned to LOW position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.

2. HIGH SPEED POSITION
With wiper SW turned to HIGH position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 8 to TERMINAL 3 of the wiper motor to TERMINAL 4 to GROUND and causes the motor to run at high speed.

3. INT POSITION
With 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 flowing the intermittent circuit and current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINALS of the wiper motor to TERMINAL 4 to GROUND and the wiper functions.
The intermittent operation is controlled by charging and discharging 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. WASHER CONTINUOUS OPERATION
With the washer SW turned to on, current flows from TERMINAL 3 of the washer motor to TERMINAL 4 to TERMINAL 11 of the wiper and washer SW to TERMINAL 2 to GROUND and causes to the washer motor to run, and the window washer is jetted.
This causes current to flow to washer continuous operation circuit in TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and the wiper functions.

REAR WIPER AND WASHER

The rear wiper motor is operated when the BACK DOOR ECU receives a signal from the BODY ECU. After use, the motor will operate until the rear wiper is stored in position.
- ON position
The rear wiper motor will operate continuously.
- INT position
The rear wiper motor will operate continuously for the first three wipes then operates intermittently.
- Storage

The rear wiper will be stored when the following conditions are met during use:
- The rear wiper SW is turned to OFF from ON or INT position.
- Ignition SW is turned to OFF.
- Back door limit SW is turned OFF
- Back door power control SW is turned ON.
- Back door key SW is turned ON.