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| Component code | Description | Reference to the assembly |
| A001 | BATTERY | - |
| B001 | ENGINE COMPARTMENT JUNCTION UNIT | |
| C010 | LEFT FRONT EARTH | - |
| C011 | RIGHT FRONT EARTH | - |
| C015 | DRIVER''S DASHBOARD EARTH | - |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| D006 | FRONT/REAR COUPLING | - |
| D020 | DASHBOARD/REAR COUPLING | - |
| E050 | INSTRUMENT PANEL | |
| F010 | LEFT HEADLAMP | |
| F011 | RIGHT HEADLAMP | |
| H001 | Ignition switch | |
| M001 | BODY COMPUTER | |
| M093 | STEERING WHEEL NODE CONTROL UNIT (NVO) | |
| M140 | WARNING LIGHTS AND MILOMETER CONTROL UNIT (NSO) | - |
The vehicle is equipped with two high beams in the headlamps.The high beams are activated by the stalk switch:- with the dipped beams on, by pushing the lever towards the dashboard (stable mode)- in flashing mode, by pulling the lever toward the steering wheel (unstable mode).Main beam activation is managed by the body computer, which activates the beams after receiving enablement signals when the key is on M and from the stalk unit control.Activation/deactivation information is sent via the CAN network: in this way, the main beam warning light is activated on the instrument panel.The body computer also manages the low beam maintenance function: it keeps the low beams on when the main beams are activated.
The high beam activation command is supplied by steering wheel node control unit M093 via CAN line (pins 1 and 3 of connector A) to body computer node M001 (at pins 5 and 3 of connector G respectively).Steering wheel node control unit M093 is connected to earth C015 (connector A) via pin 4 of connector A, and is supplied by two lines: one, from pin 11 of connector B of body computer node M001 to pin 5 of connector A; the other, from pin 1 of connector G of M001 to pin 4 of connector D, protected by fuse F04.In turn, body computer node M001 informs engine junction unit B001 (pins 12 and 11 respectively of connector F) via the CAN line (pins 25 and 27 of connector E) that a low beam activation request has been made.Engine compartment junction unit B001 suppplies pin 2 of left headlamp F010 and right headlamp F011 via pins 28 and 27 of connector G.Warning light activation is controlled by odometer warning light node M140, which communicates via CAN line (pins 2 and 5) with instrument panel E050 (pins 6 and 12) and body computer node M001 (pins 8 and 10 connector D).Body computer node M001 supplies odometer warning light node M140 at pin 4 and instrument panel E050 at pin 13 via pin 6 of connector D. This line is protected by fuse F14.
