Rear Wiper Operation
If the rear wiper and washer switch is turned to "INT" position with the ignition switch at "ACC" or "ON" position, the ETACS-ECU turns ON the rear wiper drive signal for 3 seconds (approximately 2 cycles), then 7.4 seconds later the intermittent motion operates every 8 seconds. If the selector lever is moved to the "R" position when the rear wiper and washer switch is turned to the "INT" position and the ignition switch is at the "ACC" or "ON" position, the Park/Neutral position switch "R" turns ON. One second later, the ETACS-ECU turns ON the rear wiper drive signal for 3 seconds (approximately 2 cycles). Then, 7.4 seconds later, the intermittent motion of eight seconds' cycle is restored.
Rear Washer Operation
If the rear wiper and washer switch is turned to the ON (washer) position with the ignition switch at the "ACC" or "ON" position, the rear washer ON signal is sent to the ETACS-ECU, causing the rear wiper signal to turn on after 0.3 second. After the rear washer switch signal turns off, the rear wiper signal turns off in 3 seconds. If the rear washer switch is turned to the ON position while the rear wiper is in intermittent mode, the rear washer works for that period when the washer switch remains on. Then the rear wipers return to the intermittent mode.
Low-Speed (And High Speed) Wiper Operation
Note. The windshield wiper speed is switchable with the built-in wiper speed control relay. High- speed operations take place when the wiper speed control relay is set to "ON" and low-speed operations take place when the wiper speed control relay is set to "OFF".
If the windshield low-speed wiper switch is turned to the ON position with the ignition switch at the "ACC" or "ON" position, the column switch sends a low-speed wiper ON and high-speed wiper OFF signals to the front-ECU. This turns the wiper signal on and the wiper speed control relay off (lowspeed), causing the wipers to operate at lowspeed.
If the windshield high-speed wiper switch is turned to the ON position, the column switch sends a low-speed wiper OFF and high-speed wiper ON signals to the front-ECU. This turns both the wiper signal and the wiper speed control relay on (high-speed), causing the wipers to operate at high-speed.
Intermittent Wiper Operation
The ETACS-ECU calculates the wiper operation interval according to the voltage signal sent from the column switch. Then the ETACS-ECU sends a signal to the front-ECU. The front-ECU determines the wiper operation interval and turns on the wiper relay signal relay. This causes the wiper auto stop relay to turn on. Then the wiper auto stop relay will turn off after the wipers reach the park position. This causes the wiper signal relay and then the wipers to turn off. If the wiper signal relay remains off for the wiper operation interval, the relay turns on again, causing the wipers to operate in intermittent mode.
Mist Wiper Operation
If the windshield mist wiper switch is turned to the ON position with the ignition switch at the "ACC" or "ON" position, the mist wiper high-speed operation signal is sent to the front-ECU. This signal turns on the wiper speed control relay, causing the wipers to work at high-speed while the mist switch is on.
While the windshield mist wiper switch remains turned on when the intermittent mode is still working, the wipers work as the mist wiper. However, the wipers return to the intermittent mode again when the switch is changed back to "INT" position.
To prevent the windshield mist wiper from operating when the windshield wiper switch is turned OFF, the windshield mist wiper does not work for 0.5 second after the windshield intermittent wiper switch, the windshield low-speed wiper switch and the windshield high-speed wiper switch are turned OFF.
Windshield Washer Operation
If the windshield washer switch is turned to ON position with the ignition switch at "ACC" or "ON" position, the windshield washer ON signal is sent to the front-ECU. After 0.3 second, the windshield wiper signal turns on. After the windshield washer switch signal turns off, the windshield wiper signal turns off in 3 seconds.
If the windshield washer switch is turned on while the windshield wiper is at intermittent mode, when the windshield washer switch is turned OFF within 0.2 second, the wiper works only once to perform mist operation by the windshield washer switch. When the ON condition of the windshield washer switch continues more than 0.2 second, the wiper performs the same movement as normal condition from the time when 0.2 second has elapsed and then returns to the intermittent motion.
CHECK OF REAR WIPER OPERATION WHEN SELECTOR LEVER IS AT THE "R" POSITION
- When the selector lever is moved to the R position with the rear wiper switch at the INT position, the wiper should operate twice or 3 times at low speed after approximately one second.
- If not, see «MULTIPLEX CONTROL SYSTEMS»(ref-169966) article.
Scheme 1
Wiper Motor At Low-Speed And High-Speed Operation
Connect the battery to the windshield wiper motor to inspect the operation of motor rotation in low or high speed. (Scheme 2)
Scheme 2
Wiper Motor At Stop Position Operation
- Connect the battery to the windshield wiper motor to rotate the motor in a low speed as shown in the illustration A) and disconnect the battery during rotation to stop the motor. (Scheme 2)
- Connect between the terminals and the battery as shown in the illustration B) and confirm whether the motor stops at the automatic stop position after rotating in a low speed. (Scheme 2)
Wiper Motor Operation
Connect a battery to the wiper motor as shown, and inspect the motor operation. (Scheme 3)
Scheme 3
- Run the wiper motor, disconnect the battery, and stop the motor.
- Reconnect the battery as shown, and confirm that after the motor starts turning it stops at the automatic stop position. (Scheme 3)