ALARM - DESCRIPTION

Description

The intruder alarm system offers volumetric and perimeter protection.

A control unit (inside the Body Computer) controls:

• status of doors, boot and bonnet via switches in the locks (perimeter control);
• the presence of a moving object inside the passenger compartment, via volumetric sensors. (volumetric control)
• the condition of system supply leads;
• operation of the ignition switch.

The control unit is equipped with an autodiagnostic function which detects and memorizes faults in the control unit itself and the system components; it also checks the condition of link cables and stores the number of activations and the number of alarms.

The control unit operating software may be altered to meet regulations governing the use of alarm systems applicable in different markets.

For more details

Characteristic of working principle 5580E ANTI-THEFT DEVICE

The alarm siren is located at the front, under a Locary on the left of the engine compartment.

The remote control system consists of a sending unit built into the key and a receiver built into the Body Computer.

The same switches as for the central locking system are used to control the doors and lids. A special switch detects bonnet closure. (A buzzer goes off if the body computer detects that one of the doors or the boot is open and the car is travelling faster than 5 km/h).

The volumetric sensors check for car intruders. They are located in the two centre pillars. Both are twin sensors, i.e. consisting of an emitter and a receiver: the wave transmitted by an emitter should reach the receiver of the other sensor and viceversa: if this is not the case, an alarm signal is sent to the control unit.

The deterrent LED is located on the central control panel and indicates the state of the system (on, off, etc. ) plus any faults.

All external components are connected to the Body Computer via a dedicated serial line.