Lexus RX (RX 350L, RX450h) 2016-2024 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) 2016-2024 Repair Manual > Can Communication System: Check Bus 4 Line for Short to GND
    DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 22 (CA2H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the network gateway ECU and terminal 4 (CG) of the DLC3. Symptom Trouble A ...

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Lin Communication System: No Response from ID BOX (B2789)
    DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B2789 No Response from ID BOX No communicatio ...

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

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

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