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System Diagram

Fig 1: Window Defogger System Diagram

G05776776

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication table

SIGNAL REFERENCE

Transmitter	Receiver	Signal	Line
Display and navigation assembly1 Multi-display2, *3	Air conditioning amplifier	Rear defogger switch signal	CAN
Air conditioning amplifier	Front controller	Rear defogger switch signal	CAN
HINT 1. w/ Navigation System (for HDD) 2: w/ Navigation System (for DVD) *3: w/o Navigation System

SYSTEM DESCRIPTION

GENERAL
The defogger system's thin heater wires are attached to the inside of the rear window and defog the window surface quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes

HINT:

The rear window defogger is linked with the mirror defogger.

FUNCTION OF MAIN COMPONENT

FUNCTION OF MAIN COMPONENT

Component	Outline
Defogger switch	Located on A/C control, detects defogger switch operation and transmits signals to front controller through CAN line
DEFOG relay	Receives rear defogger activation request signals from front controller through air conditioning amplifier and supplies power to rear window defogger
Rear window defogger	Receives power from DEFOG relay and heats defogger wire

DESCRIPTION

FUNCTION CHART

Function	Outline
Defog rear window surface	Receives rear defogger activation request signals from front controller through air conditioning amplifier and defogs rear window surface Receives power from DEFOG relay and heats defogger wire