E7015 Alarms

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 door lock system switches are used to check doors, boot and bonnet. 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.

Description of operation

The alarm system is managed by an alarm control unit built into Body Computer M1: it is supplied from the battery from the line of maxifuse CPL B99 - pin 18 of connector F and from a line protected by fuse F39 - pin 17 of connector F; the supply controlled by the ignition (INT) reaches pin 9.

Body Computer M1 receives door open input signals at pin 8 (left door) and 25 (right door) of connector E (the same signals turn on the timed lights Wiring diagram E2510 ROOF LAMP ).

The bonnet lid is controlled by switch I10, which is connected to pin 24 of connector A of M1, while the boot lid is controlled by switch I11, which is connected to pin 36 of connector E (the same switch turns on the boot light Wiring diagram E2520 COMPARTMENT LIGHT- BOOT LIGHT - SUN SHIELD LIGHT via a different contact.

Siren P90 is supplied by Body Computer M1, from pin 34 of connector A, and is connected to pin 25 via a dedicated serial line.

Volumetric sensors K62 are supplied by Body Computer M1, from pin 39 of connector E, and connected via a dedicated serial line to pin 7.

Aerial receiver P93 sends Body Computer M1 a signal controlling the doors and also the alarm signal by connecting to pins 21 and 31 of connector A.

Body Computer M1 connects to instrument panel E50 via the CAN line. The computer sends a signal that turns on the door open warning light when required.

Wiring diagram

Components

Component location