3234738 - E7015 ALARM - Description (Sedan)
Description
The intruder alarm system offers volumetric and perimeter protection.An electronic control unit monitors
the following:
- 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 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 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, which also
incorporates the siren, is located at the front, under the wheel
arch to the left of the engine compartment.The receiver is an electronic device which
receives the transmitter signal. It is located in the rear part
of the roof panel.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 stores the codes of enabled sending units.
The receiver also has its own autodiagnostic
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.The emergency key for deactivating the system
(not available in some markets) is located on the left of the dashboard,
next to the junction unit. It cuts out the system, for example in
the case of repair interventions.The door lock system switches are used to
check doors, boot and bonnet. A special switch is also located on
the bonnet catch.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 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
see DESCRIPTION AND OPERATION: 5580E anti-theft device
.
The alarm system control unit has direct
supply lines and lines controlled by the ignition protected by two
fuses in the junction unit., such as the remote control unit receiver.