System Diagram

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Airbag System Diagram (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Airbag System Diagram (2 Of 2)

COMMUNICATION METHOD CHART

Transmitting ECU (Transmitter)	Receiving ECU	Signals	Communication Method
Combination Meter Assembly	Center Airbag Sensor Assembly	Vehicle speed signal	BEAN
Center Airbag Sensor Assembly	Combination Meter Assembly	Driver seat buckle switch signal Passenger seat buckle switch signal Diagnosis signal (DTC) SRS warning light blink demand signal SRS warning light ON demand signal Passenger seat occupant detection signal	BEAN
Center Airbag Sensor-Assembly	Body ECU	Driver seat buckle switch signal	BEAN
ECM	Center Airbag Sensor Assembly	Engine speed signal Test mode signal Throttle opening angle information signal Stop signal Shift position signal	CAN-BEAN