System Diagram

Fig 1: Smart Key System Diagram (Entry Function)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

COMMUNICATION TABLE:

Sender	Receiver	Signal	Line
Main Body ECU	Certification ECU (Smart key ECU assembly)	IG signal ACC signal Engine switch signal Driver side door courtesy light switch signal Passenger side door courtesy light switch signal Rear LH side door courtesy light switch signal Rear RH side door courtesy light switch signal Vehicle type handle signal Back door courtesy light switch signal Back door opener switch signal Wireless door lock buzzer sound signal Door lock position signal	CAN
Meter ECU	Certification ECU (Smart key ECU assembly) Main Body ECU	Vehicle speed signal	CAN
Steering Lock ECU	Certification ECU (Smart key ECU assembly)	Encryption code signal Encryption code finish signal Encryption calculate fixed number memory requirement signal During entry control signal	LIN
ID Code Box (Immobilizer code ECU)	Certification ECU (Smart key ECU assembly)	Matching request random number signal	LIN
Certification ECU (Smart key ECU assembly)	Meter ECU	Inside key existence warning signal Low key battery warning signal Shift position warning signal Meter buzzer request signal Door open indicate signal Steering lock warning signal	CAN
Certification ECU (Smart key ECU assembly)	Main Body ECU	Entry door lock signal Entry door unlock signal Entry lock switch signal Door lock/unlock standby control signal	CAN
Certification ECU (Smart key ECU assembly)	Main Body ECU	Immobilizer ID entry required signal Key code check signal	LIN
Certification ECU (Smart key ECU assembly)	ID Code Box (Immobilizer code ECU)	Replay code signal	LIN