System Diagram

WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Smart Key System Diagram (For Start Function) (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Smart Key System Diagram (For Start Function) (2 Of 2)

COMMUNICATION TABLE

Transmitting ECU (Transmitter)	Receiving ECU (Receiver)	Signal	Communication Method
Combination meter	Main body ECU (instrument panel junction block)	Vehicle speed signal	CAN/Local communication
Steering lock ECU	Main body ECU (instrument panel junction block)	Steering lock/unlock signal	LIN/Local communication
ECM	Main body ECU (instrument panel junction block)	Starter signal	CAN
		Shift position signal	CAN
		Engine revolution speed signal	CAN/Local communication
Main body ECU (instrument panel junction block)	Certification ECU (smart key ECU assembly)	Engine switch position signal	CAN
		Courtesy light switch signal
		Wireless door lock buzzer request signal
Certification ECU (smart key ECU assembly)	Main body ECU (instrument panel junction block)	Illumination light request signal	CAN
Certification ECU (smart key ECU assembly)	Main body ECU (instrument panel junction block)	Light answer back signal	CAN
Certification ECU (smart key ECU assembly)	Combination meter	Meter buzzer single-shot request signal	CAN
		Meter buzzer intermittence request signal
		Meter buzzer continuation request signal
		Door open display signal
		Key loss warning signal
		Low key battery warning signal
		Shift position warning signal
		Steering lock abnormal warning
		Steering lock unlock warning
Combination meter	Certification ECU (smart key ECU assembly) / Main body ECU (instrument panel junction block)	Vehicle speed signal	CAN
Certification ECU (smart key ECU assembly)	Main body ECU (instrument panel junction block)	Key ID matching request signal	LIN
Main body ECU (instrument panel junction block)	Certification ECU (smart key ECU assembly)	ID required signal	LIN