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Home >> Lexus >> 2016 >> IS 350 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System / Washer System - Diagnostics - Introduction >> Wiper And Washer System >> System Description [08/2015 - ] >> System Description [08/2015 - ]
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System Description [08/2015 - ]

  1. WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. The windshield wiper switch assembly is a momentary type switch. The switch returns to the neutral position (NEUTRAL) automatically.
      Switch Operation Wiper Operation
      OFF Turns the wipers off. (MIST operates when the wipers are stopped.)
      UP Switches the wiper operation as follows: HI→LO→OFF
      • MIST operates when the wipers are stopped.
      • MIST operates when INT is selected.
      • The wiper operation will not be changed when AUTO is selected.
      DOWN Switches the wiper operation as follows: OFF→LO→HI
      • The wiper operation is switched to LO when AUTO is selected.
      • The wiper operation is not changed during HI operation.
      HI Switches to HI operation.
      AUTO wiper switch pressed for a short time. Switches to AUTO mode. (Using the auto sensitivity adjustment switch, sensitivity can be adjusted to 4 different levels.)
      AUTO wiper switch pressed for 5 seconds or more. Switches to INT mode. (Using the auto sensitivity adjustment switch, sensitivity can be adjusted to 4 different levels.)
      Fig 1: Identifying Windshield Wiper Switch Assembly
      GTY463952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Windshield Wiper Switch Assembly
      *a AUTO Wiper ON/OFF Switch (for turning AUTO mode ON/OFF and switching wiper between AUTO/INT)
      *b Auto Sensitivity Adjustment Switch
      *c Auto Wiper Indicator
      *d Wiper Speed Switch Position P4
      *e Wiper Speed Switch Position P3
      *f Wiper Speed Switch Position P2
      *g Wiper Speed Switch Position P1
      *h OFF
      *i UP
      *j Neutral Position (NEUTRAL)
      *k DOWN
      *l HI
  2. AUTO WIPER SYSTEM 
    1. General
      • The auto wiper system controls the wiper timing in accordance with the amount of raindrops that strike the windshield when the wiper switch is in AUTO.
      • The windshield wiper switch assembly controls the timing based on the signal from the rain sensor.
  3. HEADLIGHT CLEANER SYSTEM 
    1. Headlight cleaner operation (Normal)

      The headlight cleaner motor and pump assembly operate and washer fluid sprays from the headlight washer actuator sub-assembly for approximately 1 second every fifth time the washer switch is operated with the headlights turned on after the engine switch is turned on (IG).*

      *: The number of operations is cleared when the engine switch is turned off and will start from 0 when the engine switch is turned on (IG) again.

    2. Headlight cleaner operation (linked to first washer operation after the engine switch is turned on (IG))

      The headlight cleaner motor and pump assembly operate and washer fluid sprays from the headlight washer actuator sub-assembly for approximately 1 second on the first operation of the washer switch with the headlights turned on after the engine switch is turned on (IG).

  4. WASHER FLUID LEVEL WARNING 
    1. When the washer fluid level is low, "Washer Fluid Low" is displayed on the multi-information display in the combination meter assembly according to a signal from the level warning switch assembly installed to the washer tank.
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