2008 Lexus LX 570FACTORY OEM SERVICE PROCEDURE

System Description

  1. GENERAL 

    The thin heater wires of the windshield deicer system are attached to the inside of the windshield glass and deice the windshield 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
    Deicer switch Located on the display and navigation module display(1) or multi-display(2), it detects deicer switch operation and transmits signals to the air conditioning amplifier through the CAN communication line
    Deicer relay Receives windshield deicer activation request signals from the air conditioning amplifier and supplies power to the windshield deicer
    Windshield deicer Receives power from the deicer relay and heats the windshield deicer wire
    (1) w/ Navigation System
    (2) w/o Navigation System
  3. DESCRIPTION 
    FRONT WINDOW SURFACE FUNCTION CHART

    Function Outline
    Deice front window surface
    • The deicer relay receives windshield deicer activation request signals from the air conditioning amplifier and supplies power to the windshield deicer
    • Receives power from the deicer relay and heats the windshield deicer wire
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.