System Description

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

POWER DOOR LOCK SYSTEM DESCRIPTION
1. The power door lock system locks/unlocks all doors with a one-touch operation.
  - The door control switch of the master switch assembly on the driver's door and the driver's door key cylinder send lock/unlock request signals to the theft deterrent ECU through the driver door ECU using the BEAN.
  - The door control switch on the passenger door sends lock/unlock request signals to the theft deterrent ECU through the passenger door ECU using the BEAN.
  - Upon receiving request signals, the theft deterrent ECU sends these signals to the door ECUs on each door using the BEAN. The door ECUs the lock/unlock each door.
2. Components
  
  Fig 1: Power Door Lock System Components Description chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Functions
Fig 2: Power Door Lock System Function Description chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002