System Diagram

WARNING: This page is about a different car, the 2011 Lexus IS 350 and 2011 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power Door Lock Control System Diagram

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 key-linked switch signal	BEAN (DOOR BUS)