Lexus NX: System Description
SYSTEM DESCRIPTION
GENERAL
(a) The rear window defogger wires are attached to the inside of the back door glass and defog the window surface quickly when the rear window defogger switch on the air conditioning control assembly is pressed. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.
NOTICE:
If the auxiliary battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system.
for Power Tilt and Power Telescopic Steering Column: Click here .gif)
for Manual Tilt and Manual Telescopic Steering Column: Click here
FUNCTION OF MAIN COMPONENT
| Component | Outline |
|---|---|
| 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 defogger relay. |
| Defogger Relay | Receives a window defogger system activation request signal from the air conditioning amplifier assembly and supplies power to the back door glass (defogger wire). |
| Back Door Glass (Defogger Wire) | Receives power from the defogger relay and heats the back door glass. |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / 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 becomes warm by operating the rear window defogger switch of the air conditionin
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: If the auxiliary battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system. for Power Tilt and Powe
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptom are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspecte
Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier
DESCRIPTION The radio receiver assembly sends a sound signal to the stereo component amplifier assembly via this circuit. The sound signal that is sent is amplified by the stereo component amplifier assembly, and then is sent to the speakers. If there is an open or short in this circuit, sound canno
