FUNCTIONAL DESCRIPTION

There is a single (earth) signal sent by the steering column switch unit H005 to the Body Computer M001 that manages both the side lights and the dipped headlamps: from pin 3 of H005 to pin 38 of connector D of M001; the signal sent is coded by means of resistive dividers so that multiple information can be sent by the steering column switch unit to the Body Computer via a single connection.

The reference earth reaches pin 10 of H005 from pin 34 of connector D of M001.

The Body Computer M001 - connector A - receives a direct powr supply from the battery through the line protected by maxi fuse F01 of the engine compartment junction unit B001.

The Body Computer M001 receives an ignition-controlled (INT) power supply at pin 11 of connector E, whilst the ignition-controlled (INT/A) signal reaches pin 1 of connector E.

Pin 9 of connector E of M001 provides the Body Computer with a reference earth.

The Body Computer M001 controls the power supply for the dipped beams in the headlamps F010 (left) and F011 (right) from pins 10 and 27 of connector C of M001.

Each circuit is protected by a fuse in control unit M001: F13 for the left headlamp and F12 for the right.

The Body Computer M001 is connected via the CAN line to the instrument panel E050 to manage the dipped headlamps warning light and, if the dusk sensor fails, the dedicated signal.

The dipped headlamps lights are even activated if the dusk sensor is present in the rear view mirror P065 (A-BUS signal from pin 48 of connector F of M001).

The dusk sensor located in P065 is supplied by the INT line protected by fuse F49 of M001.