9-3 (9440) L4-2.0L Turbo (2007)
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Alarm Horn: Description and Operation
Siren, Anti-Theft Alarm (275)
Principal use
Used by the anti-theft alarm to sound if the alarm is triggered.
Type
The siren incorporates a speaker, a rechargeable battery and a microprocessor. The internal battery is charged on command from the body control
module (BCM) as soon as the ignition is turned to ON.
The siren is activated on command from BCM and if it is armed and one of its leads is cut or if BCM ceases its communication on the communication
cable for any reason.
If the siren has been manipulated with in an armed state and has therefore self-activated, it will sound for 10x30 seconds with a 6 second interval
between each period. The siren has varying tone ranging between 1800 Hz and 3550Hz.
The siren has 7 normal operating modes:
