175465 - HEADLAMP ALIGNMENT CONTROL UNIT (CAF)
COMPOSITION
The headlamp alignment control unit is an electronic control unit which determines the correct angle for the front light beam. It is housed under the floor, in the right front section.Description of behaviour: "Left and right headlamp stepping motor"
When the dipped headlamps are switched on and if the vehicle is stationary, the "headlamp alignment control unit" (CAF) implements the stepping motors for the two headlamps.Exterior lighting control units
This description includes the Headlamp Alignment Control Unit (CAF) and the rear light cluster interface (CFS/CFD).Headlamp alignment control unit (CAF) interface operation
The Headlamp Alignment Control Unit (CAF) is connected to the front wiring.CAF PIN OUT| PIN | Function |
|---|---|
| 1 | Not connected |
| 2 | Bulb failure |
| 3 | Not connected |
| 4 | Vehicle speed signal |
| 5 | K line |
| 6 | Front sensor signal |
| 7 | Rear sensor signal |
| 8 | Dipped headlamps signal |
| 9 | Not connected |
| 10 | Supply for front sensor (+5V) |
| 11 | Front sensor earth |
| 12 | Rear sensor earth |
| 13 | Not connected |
| 14 | Not connected |
| 15 | Right headlamp actuator 1+ |
| 16 | Left headlamp actuator 2+ |
| 17 | Left headlamp actuator 1+ |
| 18 | Left headlamp actuator 2- |
| 19 | Left headlamp actuator 1- |
| 20 | Right headlamp actuator 2- |
| 21 | Right headlamp actuator 1- |
| 22 | Right headlamp actuator 2+ |
| 23 | Key recognition (+15) |
| 24 | Control unit earth |
| 25 | Supply for rear sensor (+15) |
| 26 | Not connected |
Left/right rear light cluster control unit operation (CFS/CFD)
The left and right rear light cluster control units (CFS and CFD) are electronic components inside the rear light clusters with the function of operating and checking the LEDs for the side lights, brake lights and direction indicators. The management of the diganosis for the light clusters takes place on a serial line with the NBC.
| PIN | FUNCTION |
|---|---|
| 1 | Left brake light |
| 2 | Left direction indicator |
| 3 | Serial line to Body Computer Node (NBC) |
| 4 | Serial line from Right Headlamp Control Unit |
| 5 | +30 from fuse 68 from Luggage Compartment Control Unit |
| 6 | Earth |
| 7 | Trailer signal |
| 8 | Left side light |
| PIN | FUNCTION |
|---|---|
| 1 | Right brake light |
| 2 | Right direction indicator |
| 3 | Serial line from Left Headlamp Control Unit |
| 4 | Not connected |
| 5 | +30 from fuse 68 from Luggage Compartment Control Unit |
| 6 | Earth |
| 7 | Trailer signal |
| 8 | Right side light |