Description & Operation: Notes
WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEMS
article.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.
The multiplex communication system consists of 2 network systems:
- Body Electronics Area Network (BEAN) - Consists of Body ECU, Driver Door ECU, Front Passenger Door ECU and Theft Deterrent ECU.
- Local Area Network (LAN) - Consists of Body ECU, Left Rear Door ECU and Right Rear Door ECU.