System Diagram

Fig 1: Engine Immobiliser System - System Diagram

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Communication table:

COMMUNICATION CHART

Transmitting ECU (Transmitter)	Receiving ECU (Receiver)	Signals	Communication method
Certification ECU	Multiplex network body ECU	Security indicator light flash signal Security indicator light illumination signal Immobiliser system set/unset signal	BEAN
Power source control ECU	Certification ECU	Key code recognition signal	BEAN
Immobiliser code ECU	Certification ECU	DTC (B2791) signal	LIN
Immobiliser code ECU	Steering lock ECU	Steering lock release signal Matching request random number signal	LIN
Immobiliser code ECU	Certification ECU	Matching request random number signal	LIN