Lexus ES: System Diagram
SYSTEM DIAGRAM

Communication Table
| Transmitter | Receiver | Signal | Communication Method |
| Rear Window Defogger Switch (Air Conditioning Control Assembly) | Air Conditioning Amplifier Assembly | Rear Window Defogger Switch Signal | LIN |
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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
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 CHECK WINDOW DEFOGGER SYSTEM (a) Turn the engine switch on (IG). (b) Check that the rear window defogger wire becomes warm by operating the rear window defogger switch of the air condi
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INSTALLATION PROCEDURE 1. INSTALL HYBRID BATTERY THERMISTOR CAUTION: Be sure to wear insulated gloves and protective goggles. (a) Engage the 3 claws of the hybrid battery thermistor (sensor portions) to install the hybrid battery thermistor to the HV battery. HINT: Install each hybrid battery the
PARTS LOCATION ILLUSTRATION *1 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *2 COMBINATION METER ASSEMBLY *3 DLC3 *4 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) *5 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-B NO. 2 FUSE - DOOR F/L FUSE - DOOR F/R FUSE - DOOR R/L FUSE - DOO
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