System Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power Window Control System - System Diagram

SYSTEM DESCRIPTION

Transmitting ECU (Transmitter)	Receiving ECU (Receiver)	Signals	Communication method
Multiplex Network Master Switch	Main Body ECU RH	Driver side door manual lock switch signal Door lock/unlock request signal Driver side door key-linked switch signal	BEAN (DOOR BUS)
Main Body ECU RH	Multiplex Network Master Switch	Door lock/unlock condition signal Passenger side door manual lock switch signal Courtesy switch signal Passenger side door keylinked switch signal	BEAN (DOOR BUS)