The MICU controls the hazard flasher and the horn or the ultrasonic (KE model) based upon the input signals of each switch and the B-CAN signals.

	Input	Output
MICU	IG1 power supply Ignition key switch Audio switch Driver's door switch Driver's door key cylinder switch (LOCK/UNLOCK) Driver's door lock knob switch (UNLOCK) Passenger's door switch Passenger's door key cylinder switch (LOCK/UNLOCK) Passenger's door lock knob switch (UNLOCK) Hood switch Tailgate latch switch Tailgate lock knob switch (UNLOCK)	Hazard flasher relay Horn (except ultrasonic) Ultrasonic
B-CAN	Keyless LOCK/UNLOCK message Door lock message	MICU (SET 1) message MICU (SET 2) message ALARM (ACTION) message