System Diagram

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Pre-Collision System Diagram (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Pre-Collision System Diagram (2 Of 2)

Communication table

COMMUNICATION CHART

Sender	Receiver	Signal	Line
Driving Support ECU	Seat Belt Control ECU	Pre-collision seat belt operation signal Pre-collision system malfunction signal	CAN
Driving Support ECU	Power Steering ECU	Variable gear ratio steering operation signal	CAN
Driving Support ECU	Suspension Control ECU	Absorber control signal	CAN
Driving Support ECU	Skid Control ECU	Brake assist standby signal Pre-collision brake operation signal Pre-collision alarm signal	CAN
Driving Support ECU	Combination Meter	Pre-collision system control stop signal	CAN
Seat Belt Control ECU	Combination Meter	Pre-collision system malfunction signal	CAN
Skid Control ECU	Driving Support ECU	Sudden brake signal VSC control signal Vehicle speed signal	CAN
Skid Control ECU	Seat Belt Control ECU	ABS system malfunction signal Sudden brake signal VSC control signal Vehicle speed signal	CAN
Front Millimeter Wave Radar Sensor	Driving Support ECU	Front obstacle recognition signal	CAN
Object Recognition ECU	Driving Support ECU	Front object recognition signal	CAN
Driver Monitor ECU	Driving Support ECU	Driver facial direction signal	CAN
Yaw Rate Sensor	Driving Support ECU	Vehicle yaw rate sensor signal	CAN
Steering Angle Sensor	Driving Support ECU	Steering angle sensor signal	CAN
Center Airbag Sensor	Driving Support ECU	Buckle switch signal (both driver and passenger side)	CAN