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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Window Defogger System >> System Description

System Description

  1. GENERAL 

    The thin heater wires of the defogger system are attached to the rear window and defog the rear window surface quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.

  2. FUNCTION OF MAIN COMPONENT 
    MAIN COMPONENT FUNCTION CHART

    Component Outline
    Defogger switch Located on the display and navigation module display(1) or multi-display(2), it detects defogger switch operation and transmits signals to the air conditioning amplifier through the CAN communication line
    Defogger relay Receives rear window defogger activation request signals from the air conditioning amplifier and supplies power to the rear window defogger
    Rear window defogger Receives power from the defogger relay and heats the defogger wire
    (1) w/ Navigation System
    (2) w/o Navigation System
  3. DESCRIPTION 
    REAR WINDOW SURFACE FUNCTION CHART

    Function Outline
    Defog rear window surface
    • The defogger relay receives rear window defogger activation request signals from the air conditioning amplifier and defogs the rear window surface
    • Receives power from the defogger relay and heats the defogger wire
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