9-5 SE Sedan (9600) V6-3.0L Turbo (B308) (1999)
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Alarm Horn: Description and Operation
Siren
To trip the audible alarm, a siren (piezo electric) with battery back-up is fitted to the anti-theft alarm. This is mounted on the front edge of the left front
wheel housing.
Function
The siren is powered with +30 from fuse 14 (342a) and grounded at grounding point G30. TWICE communicates with the siren via pin 29. TWICE
arms/disarms the siren and also controls the sound pattern when the alarm is tripped.
Information from the siren on faults or a low battery is sent to TWICE on the same lead.
Programming
The duration of the siren sound when an alarm is tripped, and the pattern of the sound, are programmable.
Battery back-up
The siren has an in-built battery back-up which means that even if the power to the battery is cut (disconnected battery, cut lead), when an alarm is
tripped the siren will continue to sound using its integral battery.
The battery life is approx. 10 years.
