Start Key System

TRANSMITTING ECU, RECEIVING ECU AND SIGNALS REFERENCE (START KEY SYSTEM)

Transmitting ECU (Transmitter)	Receiving ECU (Receiver)	Signals	Communication method
ID code box	Certification ECU	Matching request random number signal EEP ROM access malfunction Model code matching signal Model code mismatching signal ECM code receiving status Engine start permission request signal Engine start permission response signal S code matching result signal S code registration status signal S code registration mode signal L code matching result signal ECM communication signal The number of registered key response signal Diagnosis mode switching signal	LIN
Certification ECU	ID code box	3 bit code request signal ID code matching result signal The number of registered key signal Vehicle type handle signal	LIN
ID code box	Certification ECU Steering lock ECU	L code registration mode signal Diagnosis mode request signal DTC clear request signal	UN
ID code box	Steering lock ECU	L code registration status signal	LIN
Certification ECU	Certification ECU ID code box	Steering lock request signal	LIN
Steering lock ECU	Certification ECU	Steering unlock signal Steering lock confirmation Steering unlock confirmation signal Diagnosis response signal Steering lock drive relay signal Steering unlock drive relay signal Steering lock motor operation signal	LIN
ID code box	Certification ECU	The number of registered key signal	LIN
Power source control ECU	Certification ECU	Shift position P signal Power ON operation status signal Engine starting status ACC relay operating status IG relay operating status	LIN
Power source control ECU	Steering lock ECU	Steering lock relay power supply status	LIN
Steering lock ECU	Certification ECU Power source control ECU	Steering lock catching malfunction signal Push button start malfunction signal Engine operation signal	LIN