Workshop Manuals Factory service & repair Fiat
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Special tools
Fiat Croma Factory Service Manual (2005-2010)19 · Wiring diagrams and electrical functions
19 · Electrical

Alarm - functional description

Make
Fiat
Model
Croma Factory Service Manual
Year
2005–2010
Section
Vehicle electronic systems › Alarm - functional description
Wiring diagrams and electrical functionsAlarm - functional description

ALARM - FUNCTIONAL DESCRIPTION

The alarm system is managed by the alarm control unit incorporated in the Body Computer M001, supplied directly by the battery (+30) by the line for maxifuse CPL B099 - pin 18 of connector F and by the line protected by fuse F39 - pin 17 of connector F.

The igntion controlled power supply (INT from the steering lock control unit) reaches the Body Computer at pin 9 of connector F.

The Body Computer M001 receives "door open" input signals at pin 8 connector D (driver''s front door), pin 25 connector E (passenger front door), pin 16 connector D (left rear door) and pin 26 connector D (right rear door).

These are the same signals that turn on the lights with a timed delay.

See E2510 COURTESY LIGHTS

The bonet is controlled by switch I010 which is connected to pin 24 of connector B of the Body Computer M001, whilst the boot is controlled by switch I011 which is connected to pin 24 of connector E of the Body Computer M001.

It is the same switch that switches on the boot light with a different contact.

See E2520 GLOVE COMPARTMENT LIGHT - LUGGAGE COMPARTMENT LIGHT - SUN VISOR LIGHT

The siren P090 receives a supply from the Body Computer M001, from pin 34 connector B and is connected with the dedicated serial line at pin 25 of connector B of the Body Computer M001.

The volumetric, perimeter and lift sensors K062 receive a power supply from pin 39 of connector E from the Body Computer M001 and are connected by the dedicated serial line to pin 7 of connector D of the Body Computer M001.

Unit K062 receives a power supply from the ignition controlled line (INT) protected by fuse F49 of the junction unit under the dashboard B002.

The volumetric sensors K062 incorporate the buttons for excluding the volumetric sensors and the lifting sensor.

The deterrent LED E040, located on the driver''s front door, is connected to pins 6 and 8 of connector C of the driver''s door control unit M066

The remote control receiver aerial, located in the ignition device H003 is connected to the Body Computer via the B-CAN.

See E3040 CENTRAL LOCKING

Parts & tools for this job For 2005 Fiat Croma

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