Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: System Description

SYSTEM DESCRIPTION

GENERAL

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

NOTICE:

If the battery voltage is low, the windshield deicer system may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

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FUNCTION OF MAIN COMPONENT

Component

Outline

Front Wiper Deicer Switch (Multi Display Assembly)

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

Air Conditioning Amplifier Assembly

Sends windshield deicer activation request signals to the semiconductor pwr integration ECU.

Semiconductor Pwr Integration ECU

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

Windshield Deicer Wire (Windshield Glass)

Receives power from the semiconductor pwr integration ECU and heats the windshield deicer wire (windshield glass).

    System Diagram
    SYSTEM DIAGRAM Sender Receiver Signal Communication Method Radio Receiver Assembly Air Conditioning Amplifier Assembly Front wiper deicer switch signal CAN ...

    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 BROUGHT TO WORKSHOP NEXT ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Cruise Control Main Switch: Inspection
    INSPECTION PROCEDURE 1. INSPECT CRUISE CONTROL MAIN SWITCH (a) Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Cruise Control Switch) - - Standard Resistance: Tester Connection Condition Specified Condition 1 (ECC) ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Integration Relay: On-vehicle Inspection
    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SEMICONDUCTOR POWER INTEGRATION ECU (SIGNAL READING CHECK) NOTICE: Both present and history signal readings will be cleared if the semiconductor power integration ECU is removed. Make sure not to remove it before inspection. HINT: The signal readings of the ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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