Lexus ES: System Description
SYSTEM DESCRIPTION
GENERAL
(a) The rear window defogger wire (back window glass) is attached to the inside of the rear window and defogs the window surface quickly when the rear window defogger switch is pressed. The indicator light on the switch illuminates while the system is operating. This system automatically turns off after approximately 15 minutes.
NOTICE:
If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the power steering system. In this case, the window defogger system may not operate.
HINT:
The window defogger system is linked with the mirror heater function.
FUNCTION OF MAIN COMPONENT
| Component | Outline |
|---|---|
| Rear Window Defogger Switch (Air Conditioning Control Assembly) | Sends signals to the air conditioning amplifier assembly to operate the window defogger system. |
| Air Conditioning Amplifier Assembly | Sends a window defogger system activation request signal to the DEF relay. |
| DEF Relay | Receives a window defogger system activation request signal from the air conditioning amplifier assembly and supplies power to the rear window defogger wire (back window glass). |
| Rear Window Defogger Wire (Back Window Glass) | Receives power from the DEF relay and heats the rear window using the rear window defogger wire (back window glass). |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the window defogger system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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Operation Check
OPERATION CHECK CHECK WINDOW DEFOGGER SYSTEM (a) Turn the power switch on (IG). (b) Check that the rear window defogger wire becomes warm by operating the rear window defogger switch of the air condit
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Use the table below to help determine the cause of problem symptoms.
SEE MORE:
Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whethe
Installation
INSTALLATION PROCEDURE 1. INSTALL REAR UPPER CONTROL ARM ASSEMBLY LH (a) Temporarily install the rear upper control arm assembly LH to the rear suspension member sub-assembly with the bolt and nut. NOTICE:
Because the nut has its own stopper, do not turn the nut. Tighten the bolt with the nu
