Vehicles With Theft Alarm Sensor

The theft alarm with the theft alarm sensor and theft alarm siren has been adopted.

• The alarm for door/hood tampering and the alarm for vehicle invasion, jack-up, or power line cutoff to the ETACS-ECU/theft-alarm siren are established.
• The theft-alarm sensor is connected to the ETACS-ECU via the LIN* bus line.
• The theft-alarm siren is connected to the ETACS-ECU by the LIN* bus line via the LIN cutoff control unit. (With the "Exterior protection" status, the horn does not sound.)

theft alarm sensor 

• The ultrasonic wave sensor is incorporated to judge whether it is invasion or not from the change of reflected ultrasonic wave
• The inclination sensor is incorporated to determine that it is an irregular action if the vehicle is raised for 3-degree angle or more at the rate of 1-degree angle or more per minute.

LIN cutoff control unit 

• With the "Ready to be triggered" status, the LIN communication between the theft-alarm siren and ETACS-ECU is cut off to suppress the occurrence of the dark current.
• With the "Ready to be triggered" status, if the ETACS-ECU detects invasion or irregular action by the theft-alarm sensor or tampering by the door switch or hood switch, the LIN communication is reactivated.

theft alarm siren 

• If the ETACS-ECU detects irregular action, it sends a sounding request signal to the theft-alarm siren by the LIN communication.
• When the theft-alarm is in the "Ready to be triggered" status, if the signal transmission to the theft-alarm siren is cut off due to an abnormality in the power supply to the ETACS-ECU, the occurrence of irregular action is detected and the alarm sounds automatically* without the sounding request signal from the ETACS-ECU.