Wiper and Washer Systems: Description and Operation
SYSTEM DIAGRAMSystem Diagram (Part 1):
System Diagram (Part 2):
HINT:
- Wiper operation is controlled by the cowl side junction block ECU LH.
- The rain sensor controls the auto wiper function.
SYSTEM DESCRIPTION
1. FRONT WIPER SYSTEM
a. The front wiper system receives the wiper operation signal from the combination switch, and the cowl side junction block LH ECU operates the wiper motor.
b. The cowl side junction block LH ECU adjusts the intermittent interval during wiper motor operation according to commands received from the combination switch. This adjustment is based on vehicle speed, brake signals, etc., and a determination of the vehicle driving and stopping conditions during the intermittent operation. The system has the given functions:
2. FRONT WASHER SYSTEM
a. The front washer system receives the wiper operation signal from the combination switch, and the front light ECU operates the washer motor.
3. CONTINUOUS FRONT WASHER WIPER SYSTEM
a. The continuous front washer system receives the washer operation signal from the combination switch, and the cowl side junction block LH ECU operates the wiper motor. The front wipers are operated 3 times after the front washer is stopped.
b. The front wiper stops after operating 3 times from the point where the front washer switch has been ON for more than 40 seconds continuously. The front wipers are then operated once at an interval of 3 to 7 seconds. The interval is determined by the vehicle speed signal received from the combination meter.
4. AUTOMATIC WIPER SYSTEM
a. In the automatic wiper system, the rain sensor mounted in the upper portion of the windshield sends a front wiper operation command, based on the amount of rainfall, to the cowl side junction block LH ECU. The front wipers operate when the windshield wiper switch is in the AUTO position. The rain sensor sensitivity can be adjusted with the rain sensor adjusting switch.
b. In this system, the cowl side junction block LH ECU receives the vehicle speed signal from the combination meter, and operates the front wipers according to the vehicle speed.
c. The cowl side junction block LH ECU adjusts the intermittent interval during wiper motor operation according to commands received from the rain sensor. This adjustment is based on vehicle speed, brake signals, etc., and a determination of the vehicle driving and stopping conditions during the intermittent operation.
5. HEADLIGHT CLEANER SYSTEM
a. The headlight cleaner system operates when the headlights are ON and the headlight cleaner switch is pushed ON. It also operates when the headlights are ON and the front wiper washer system is operating. However, it does not operate when the daytime driving light system is operating.