Toyota CH-R Service Manual: System Description



The windshield deicer thin heater wires are attached to the inside of the windshield glass to help deice the window surface more quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.


If the battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system.

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Air Conditioning Control Assembly

Sends signals to the air conditioning amplifier assembly to operate the windshield deicer.

Air Conditioning Amplifier Assembly

Sends windshield deicer activation request signals to the DEICER relay.


Receives windshield deicer activation request signals from the air conditioning amplifier assembly and supplies power to the windshield glass (windshield deicer).

Windshield Glass (Windshield Deicer)

Receives power from the DEICER relay and heats the windshield glass (windshield deicer).

    System Diagram

    How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the windshield deicer system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROU ...

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