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

High beams - description

Make
Fiat
Model
Croma Factory Service Manual
Year
2005–2010
Section
Exterior lighting › High beams - description
Wiring diagrams and electrical functionsHigh beams - description

HIGH BEAMS - DESCRIPTION

The vehicle is equipped with two high beams in the headlamps.

The high beams are activated by operating the left steering wheel stalk:

- when the low beams are on, by pulling the lever toward the steering wheel (2nd unstable position);

- in flashing mode, irrespective of wheel position, by pulling the lever towards the steering wheel (1st unstable position);

The high beam activation relay is controlled by the Body Computer The relay is excited by enablement signals received when the key is inserted into the ignition and turned ON (INT from the steering lock control unit) and a specific control signal from the steering wheel stalk unit.

Activation/deactivation information is sent via the CAN network: in this way, the high beam warning light is activated on the control panel.

for legal reasons, if the dusk sensor is activated, only the flasher can be operated and the main beams cannot be turned on permanently; the AUTO function must be switched off in order to activate these lights.

XENON GAS HEADLAMPS

The vehicle is fitted with two GAS DISCHARGE headlamps.

The electronics in each of the two headlamps switches the gas discharge (xenon) bulbs on and off at the times defined by the software and in accordance with international legislation.

The system comprises an igniter and ballast for each headlamp, activated when the dipped headlamps function is requested.

The left lamp is the master control unit, whilst the right one performs a slave role.

The master headlamp acquires the low and high beam command, the vehicle speed signal and signals from the potentiometers on the front and rear wheel axles. Depending on the inputs, it directly controls the switching on of the left front headlamp (dipped headlamps and high beam switching) and controls the right one in a similar way via the serial line.

A motor controlled by the electronics in each headlamp switches the headlamps between low and high. Switching is managed by a signal to activate the high beams in fixed mode.

Activation of the high beams in flashing mode is managed directly by the engine compartment control unit by means of two signals sent to the supplementary halogen bulbs (55W) built into the headlamps. These bulbs are also active in fixed mode, but the high beam control (via xenon bulbs) renders them secondary.

The high beams are activated by operating the left steering wheel stalk:

- when the low beams are on, by pulling the lever toward the steering wheel (2nd unstable position);

- in flashing mode, irrespective of wheel position, by pulling the lever towards the steering wheel (1st unstable position);

The high beam activation relay is controlled by the Body Computer The relay is excited by enablement signals received when the key is inserted into the ignition and turned ON (INT from the steering lock control unit) and a specific control signal from the steering wheel stalk unit.

Activation/deactivation information is sent via the CAN network: in this way, the high beam warning light is activated on the control panel.

for legal reasons, if the dusk sensor is activated, only the flasher can be operated and the main beams cannot be turned on permanently; the AUTO function must be switched off in order to activate these lights.

Parts & tools for this job For 2005 Fiat Croma

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.