Lexus ES: 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 becomes low, battery load control will operate in order to ensure sufficient power is supplied to the power steering system. In this case, the windshield deicer system may not operate.
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 DEICER relay. |
| DEICER Relay | 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 DEICER Relay and heats the windshield deicer wire (windshield glass). |
READ NEXT:
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
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Operation Check
OPERATION CHECK CHECK WINDSHIELD DEICER SYSTEM (a) Turn the engine switch on (IG). (b) Check that the windshield deicer wire (windshield glass) becomes warm by operating the front wiper deicer switch.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
If the battery voltage becomes low, battery load control will operate in order to ensure sufficient power is supplied to the power steering system. In this case, the
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Pressure Control Solenoid "A" Circuit Short to Ground or Open (P074514)
DESCRIPTION Refer to DTC P074512. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P074514 Pressure Control Solenoid "A" Circuit Short to Ground or Open While the vehicle is being driven so that gear changes occur, a short to ground or o
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL HEADLIGHT ASSEMBLY Click here 2. INSTALL FRONT FENDER SPLASH SHIELD SUB-ASSEMBLY Click here 3. INSTALL COWL TOP PANEL INSULATOR
