Xenon light control unit, component description - GF82.10-P-2119FL

MODEL 212.0/2 up to 28.2.13 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (616) Bi-xenon headlamp unit with integrated asymmetric curve illumination with CODE (621) Intelligent Light System (left-hand traffic) with CODE (622) Intelligent Light System (right-hand traffic) 

Location 

There is one xenon light control unit on the underside of the left front lamp unit and one on the underside of the right front lamp unit. The xenon light control units are tightly screwed to the housings of the front lamp units. The xenon light control units are connected to the vehicle-side wiring harness via the front lamp units.

Task 

The xenon headlamp control units operate in a master-slave combination and communicate with each other via front end CAN (CAN G). As the master the left xenon light control unit synchronizes the right xenon light control unit. The xenon headlamp control units have the following tasks:

• Reading in of sensors, pickups and signals 
• Evaluation of input factors 
• Control of functions 
• Actuation of components 

Reading in of sensors, pickups and signals 

The input factors are read in via the following connections:

• Direct line (left xenon light control unit) 
• Front end CAN 

Direct line 

The signals of the following components are read in by the left xenon light control unit in vehicles without code (489) AIRmatic (air suspension with continuous adjustment damping) via a direct line:

• Left rear level sensor (B22/7)
• Left front level sensor (B22/8)

Front end CAN 

The signals are read in by the xenon light control units via the front end CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

In vehicles with code (489) AIRmatic (air suspension with continuous adjustment damping), the vehicle level information is provided by the AIRmatic control unit (N51/3) to the chassis CAN (CAN E) and forwarded by the front SAM control unit with fuse and relay module (N10/1) to the front end CAN.

Evaluation of input factors 

The input factors are evaluated by the microprocessor and the corresponding components are actuated.

Control of functions 

The following functions are realized by actuating the appropriate components:

• Low beam
• High beam and headlamp flasher
• Automatic headlamp range adjustment (HRA [LWR])
• Turning lamps
• Dynamic curve illumination
• Active light distribution (for code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• Local Interconnect Network (LIN) (headlamp-internal) 

Direct line 

The following components are actuated via a direct line:

• Left xenon bulb with integrated ignition module (E1e10) by the left xenon light control unit
• Right xenon bulb with integrated ignition module (E2e10) by the right xenon light control unit

LIN 

The following components are actuated by the left xenon light control unit via the headlamp-internal LIN:

• Left headlamp range adjustment actuator motor (E1m1)
• Left active curve illumination actuator motor (E1m2)
• Left light distribution actuator motor (E1m3)

The following components are actuated by the right xenon light control unit via the headlamp-internal LIN:

• Right headlamp range adjustment actuator motor (E2m1)
• Right active curve illumination actuator motor (E2m2)
• Right light distribution actuator motor (E2m3)

Wiring diagram of front SAM control unit with fuse and relay module (N10/1)

Sheet 2

PE54.21-P-2106-97DAB