WIPER AND WASHER SYSTEM


  1. FUNCTION OF MAIN COMPONENTS


    1. The wiper and washer system has the following components and functions:

      Component Function
      Windshield Wiper Switch Assembly

      • Outputs the position signal of the windshield wiper switch assembly to the windshield wiper motor assembly, rear wiper motor assembly and windshield washer motor and pump assembly (and windshield wiper relay assembly*).

      • Setting this switch to AUTO will cause the rain sensing function to operate. This switch is also used to adjust the rain sensing function sensitivity.*
      Windshield Wiper Link Assembly Windshield Wiper Motor Assembly Activates the front wipers in accordance with the position signal of the front wiper switch on the windshield wiper switch assembly (or the control signal from the windshield wiper relay assembly*).
      Windshield Washer Motor and Pump Assembly Activates in accordance with the signal from the washer switch (windshield wiper switch assembly).
      Rear Wiper Motor Assembly Activates the rear wiper in accordance with the position signal of the rear wiper switch on the windshield wiper switch assembly.
      Rain Sensor* Senses rain when the front wiper switch (windshield wiper switch assembly) is in AUTO, and sends signals to the windshield wiper relay assembly.
      Windshield Wiper Relay Assembly* Receives the operation signal from the windshield wiper switch assembly (front wiper switch and washer switch) and the rain sensor, and inputs them into the windshield wiper motor assembly.
      Combination Meter Assembly

      • Outputs the vehicle speed signal to the windshield wiper relay assembly.*

      • When the volume of washer fluid decreases to below a certain level, the combination meter assembly warns the driver through the warning message.
      Washer Fluid Level Warning Switch Outputs a signal to the combination meter assembly when the volume of washer fluid decreases to below a certain level.

      *: Models with rain sensing function

  2. FUNCTION


    1. On models with the rain sensing function, the wiper system has the following functions.

      Function Outline
      Wiper Forced Wiping

      When any one of the following conditions is met while wiping is controlled by the rain sensing function, the windshield wiper relay assembly forcibly operates the front wipers once.


      • The front wiper switch (windshield wiper switch assembly) is turned from OFF to AUTO when the ignition switch is turned to ON.

      • The vehicle starts off.

      • The automatic control adjuster is turned to the + direction (to boost sensitivity).
      Rain Sensing Controls the wiping interval and speed in accordance with the amount of rain and vehicle speed when the windshield washer switch assembly is in the AUTO position.
      Washer-linked Wiper To prevent fluid from dripping after the washer has been operated, this function operates the wipers once after being operated in unison with the washer.

    2. Rain Sensing Function (Models with Rain Sensing Function)


      1. The rain sensing function controls the wiper timing in accordance with the amount of rain that strikes the windshield when the front wiper switch (windshield wiper switch assembly) is in the AUTO position.

    3. Washer-linked Wiper Function


      1. When the wiper switch (windshield wiper switch assembly) is turned to OFF or AUTO and the washer switch (windshield wiper switch assembly) is turned on, washer fluid is sprayed and after approximately 0.5 seconds the wipers start operating in LO.

      2. The wipers operate 3 times in LO after the washer switch (windshield wiper switch assembly) is turned off.

        Figure 1. Timing Chart

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  3. FAIL-SAFE


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


      • Continuously performs the same wiper operation performed prior to the occurrence of a malfunction.

      • Switches to intermittent operation if a malfunction of the rain sensor is detected when the ignition switch is turned from off to ON or the windshield wiper switch assembly is in the AUTO position.