WIPER AND WASHER SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function

    Windshield Wiper Switch Assembly


    • Wiper ECU

    • AUTO Switch*1

    • Wiper Control Switch

    • Automatic Control Adjuster*1

    • Interval Time Adjuster*2

    • Washer Switch

    • Outputs the position signal of the windshield wiper switch assembly to the windshield wiper motor assembly.

    • Setting the AUTO switch on will cause the rain sensing function to operate.*1
    Rain Sensor*1 Senses rain when the AUTO switch (windshield wiper switch assembly) is on, and sends signals to the windshield wiper switch assembly.
    Windshield Wiper Motor Assembly Activates the front wipers in accordance with the position signal of the windshield wiper switch assembly.
    Windshield Washer Motor and Pump Assembly Activates in accordance with the signal from the windshield wiper switch assembly.
    Steering Sensor Receives the vehicle speed signal from the skid control ECU and sends it to the windshield wiper switch assembly.

    Brake Actuator Assembly


    • Skid Control ECU

    		 Sends the vehicle speed signal to the steering sensor.
    Combination Meter Assembly Receives the operation signal from the windshield wiper switch assembly.
    Main Body ECU (Multiplex Network Body ECU) Sends the dimmer signal to the windshield wiper switch assembly.

    *1: Models with rain sensing function

    *2: Models without rain sensing function

  2. FUNCTION


    1. Rain Sensing Function


      1. The rain sensing function controls the wiping timing in accordance with the amount of rain detected when the AUTO switch (windshield wiper switch assembly) is on.

      2. This control is effected by the rain sensor based on the amount of rain and input signals from the windshield wiper relay assembly.

      3. A luminance detection function is provided to automatically change the rain sensitivity according to day or night.

    2. Washer-linked Wiper with Drip-prevention Function


      1. When the windshield wiper switch assembly is set to off or AUTO and the washer switch is turned on, the wipers start on LO at the same time as the washer fluid is sprayed.

      2. The wipers operate 3 times on LO after the washer switch is turned off.

      3. When the washer switch is turned on for approximately 0.5 seconds or more and vehicle speed is approximately 4 km/h (2 mph) or less, as shown in the following diagram, after the end of this operation, the wipers operate once more.

        A01MQOXE01

    3. Switch Operation Display (Models with Rain Sensing Function)


      1. If the automatic control adjuster is operated when the AUTO switch of the windshield wiper switch assembly is off, the operation advice of how to enable the rain sensing function is displayed on the multi-information display in the combination meter assembly for approximately 3 seconds.

      2. If the automatic control adjuster is operated when the AUTO switch of the windshield wiper switch assembly is on, the currently selected sensitivity level is displayed on the multi-information display in the combination meter assembly for approximately 3 seconds.

      3. This switch operation display can be disabled using a customizing function. For details, refer to the repair manual.

  3. FAIL-SAFE


    1. If the windshield wiper switch assembly detects a malfunction during the operation of the rain sensing function, the following controls will be performed:

      Trouble Area Condition
      Speed Signal Malfunction If a malfunction occurs in the speed signal, control will continue using the speed the vehicle was traveling at before the malfunction occurred.
      Communication Signal Malfunction If a malfunction occurs in the LIN communication signal, control will continue while preserving the same control status that was in effect before the malfunction occurred.
      Rain Sensor Malfunction If a malfunction occurs in the rain sensor, intermittent operation will be conducted in accordance with the position of the automatic control adjuster.
      Rain Sensor Temperature Malfunction If the temperature of the rain sensor becomes abnormally high or low, control will be stopped.
      Rain Sensor Low Voltage If the voltage of the power source of the rain sensor becomes low, control will continue while preserving the same control status that was in effect before the malfunction occurred.