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System Diagram

Fig 1: Window Defogger System Diagram
G04023093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication table 

RESULT PROCEDURE CHART

Sender
 
Receiver Signal Line
Multi-display A/C amplifier assembly (A/C ECU) Rear defogger switch signal BEAN / AVC-LAN
A/C amplifier assembly (A/C ECU) ECM Rear defogger switch signal BEAN / CAN