3309973 - E7015 ALARM - Description
Description
The intruder alarm system offers volumetric
and perimeter protection.In effect, an electronic control
unit checks:
- 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 the system supply cables (both directly
from the battery and those controlled by the ignition);
- the condition of emergency key supply leads;
- the operation of the ignition switch.
The control unit is equipped with a self-test
function which detects and memorizes faults in the control unit
itself and the system components and also checks the condition of
the connecting cables.The control unit also memorizes the number
of times the alarm is activated and set off.The control unit operating software may
be altered to meet regulations governing the use of alarm systems
applicable in different markets.The electronic control unit incorporates
a siren and is located in the right lower part of the luggage compartment
(not visible). It is accessible via a flap in the trim.The receiver is an electronic device which
receives the transmitter signal. It is located in the parcel shelf
under the third brake light cover.It is connected to the control unit
via the serial line and directly manages the following system functions:
- it receives, decodes and manages the remote control signals
- it locks and unlocks the doors
- it memorizes the codes for enabled transmitters.
The receiver also has its own self-test
function which detects and memorizes faults in the actual receiver
and the components connected to it and it checks the condition of
the connecting cables.A device for deactivating the system by
means of an emergency key is located on the control unit where is
is protected by a cap. It cuts out the system, for example in the
case of repair interventions.The same switches as for the central locking
system are used to control the doors and lids. A special switch
is also located on the bonnet catch.The volumetric sensors check for car intruders.
They are located on either side of the front courtesy light. Both
are 'dual' sensors, i.e. each consists of a transmitter and a receiver
The wave sent by a transmitter 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 dissuasion LED is located in the dashboard,
in the centre above the air vent and signals the state of the system
(on, off, etc.) plus any faults.
For more details
Characteristic of working principle 5580E anti-theft device
.
Direct and ignition-operated alarm system
control unit supply lines are protected by three fuses located in
the junction unit.