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Defogger (Diagnostics): Overview Lexus RX III

Heated Glass/defoggers 1 illustration ~333 words

SYSTEM DESCRIPTION

  1. GENERAL The rear window defogger wires are attached to the inside of the rear window and defog the window surface quickly by pressing the rear window defogger switch on the air conditioning control assembly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes. HINT: If both of the following conditions are met after approximately 15 minutes from the rear window defogger was activated, the rear window defogger continues to operate up to approximately 45 minutes. If the following conditions are not met, the rear window defogger stops operating immediately. The outside temperature is -3°C (27°F) or below. The vehicle speed is 45 km/h (28 mph) or more. HINT: The rear window defogger is linked with the mirror defogger. NOTE: If the battery voltage becomes low, window defogger operation is cancelled to prioritize supplying power to the power steering system.
  2. FUNCTION OF MAIN COMPONENT Component Outline RR DEF Relay Receives rear window defogger activation request signal from the air conditioning amplifier assembly and supplies power to the rear window defogger. Rear Window Defogger Wire Receives power from the RR DEF relay and heats the window using the rear window defogger wires.

DESCRIPTION

When the rear window defogger switch on the radio receiver assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through the AVC-LAN and LIN*1 or CAN*2 communication line. When the air conditioning amplifier assembly receives the signal, it turns on the RR DEF relay to operate the rear window defogger.

  1. *1: w/o Navigation System
  2. *2: w/ Navigation System

Scheme 16

Scheme 16: WIRING DIAGRAM
Scheme 16: WIRING DIAGRAM

When the rear window defogger switch on the radio receiver assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through the AVC-LAN and LIN*1 or CAN*2 communication line. When the air conditioning amplifier assembly receives the signal, it turns on the RR DEF relay to operate the rear window defogger.

  1. *1: w/o Navigation System
  2. *2: w/ Navigation System

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