System Diagram

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

Fig 1: Identifying SRS System Diagram (1 Of 2)

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Fig 2: Identifying SRS System Diagram (2 Of 2)

Combination table:

TRANSMITTING ECU COMMUNICATION REFERENCE

Transmitting ECU (Transmitter)	Receiving ECU	Signals	Communication method
Center Airbag Sensor	ECM	Crash detection signal Fuel cut signal	CAN
Center Airbag Sensor	Combination Meter	SRS warning light ON demand signal SRS warning light blink demand signal Passenger seat occupant detection signal Passenger seat buckle switch signal Diagnosis signal (DTC)
Combination Meter	Center Airbag Sensor	Vehicle speed signal Meter diagnosis polling signal
ECM	Center Airbag Sensor	Engine speed signal Accelerator opening angle information Accelerator opening angle signal Shift position signal Test mode signal Stop signal