125002135 - E2012 MAIN BEAM HEADLAMPS - FUNCTIONAL DESCRIPTION

Functional description

The main beam headlamps activation signal is sent to pin 33 of connector B of the Body ComputerM1from the steering column switch unitH5.The ''ignition ON'' signal (INT) for the switch H1 reaches the underdashboard control unitB2at pin 11 of connector H and from there moves on to the Body ComputerM1(pin 9 of connector F).The Body ComputerM1controls the supply to the main beam headlamps by sending an earth signal to the engine compartment control unitB1- from pin 9 of connector A ofM1- which energizes the relay T2: this supplies the dipped headlamps F10 (left) andF11(right). Each circuit is protected by a control unit B1 fuse:F15for the left headlamp andF14for the right one.The Body ComputerM1is connected, via the CAN line, to the instrument panelE50to manage the main beam headlamps warning light.