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Vehicles not fitted with a battery backed sounder are fitted with an anti-theft alarm horn. The anti-theft alarm horn is located in the RH front fender, behind the headlamp. Power supply to the anti-theft alarm horn is controlled by the anti- theft system module via a relay located beneath the drivers seat. If the anti-theft system is triggered, the anti-theft alarm horn will emit either a pulsed or continuous tone depending on market legislation. INTRUSION DETECTION MODULE The intrusion detection module monitors movement within the vehicle cabin. The module is located; at the top of the RH B pillar on 90/110 station wagons on the front of the headlining, adjacent the interior mirror on 90/110 pick-ups on the RH side of the headlining, above the front door on 130 crew cabs. The intrusion detection module emits a series of ultrasonic sound waves. By measuring the returned sound wave the intrusion detection module can first determine a 'foot print' of the vehicle cabin, and then determine if movement has taken place within this area. The intrusion detection module is connected directly to the anti-theft system module. If movement is detected in the cabin, the intrusion detection module provides a pulsed voltage signal to the anti-theft module, triggering the alarm. INSTRUMENT CLUSTER |