When the doors are locked using the keyless entry or KOS (excluding the locking using
the key cylinder or others), the improper opening of door or hood causes the ETACS-ECU function
and control to give off an alarm with the flashing of hazard warning lamp (turn-signal lamp)
and the intermittent sounding of horns. Also, with the flashing of security indicator, the alarm
state is notified (Refer to Function and Control by ETACS-ECU ).
CONSTRUCTION DIAGRAM
<Vehicles with security alarm sensor>
The security alarm with the security alarm sensor and security 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/security alarm siren are established.
The security alarm sensor is connected to the ETACS-ECU via the LIN*1.
The security alarm siren is connected to the ETACS-ECU by the LIN-TAS*2.
(With the "Exterior protection" status, the horn does not sound.)
note
LIN *1 (low-speed body network), LIN-TAS *2 (anti-theft
alarm network)
Security 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.
note
The sensor sensitivity can be adjusted by the M.U.T.-III.
Security alarm siren
With the "Ready to be triggered" status, the LIN communication between the security
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 security alarm sensor or tampering by the door switch or hood switch, the LIN communication
is reactivated.
If the ETACS-ECU detects irregular action, it sends a sounding request signal to
the security alarm siren by the LIN communication.
When the security alarm is in the "Ready to be triggered" status, if the signal
transmission to the security 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.
note
*: The security alarm siren incorporates a rechargeable battery.
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