194001310 - E2012 HIGH BEAMS - DESCRIPTION (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.