Xenon headlamp control unit component description - GF82.10-P-2114GM
MODEL 164.1 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination as of model year 2009/YoM 08 model refinement package
MODEL 164.8 up to 30.6.09 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination as of model year 2009/YoM 08
MODEL 164.8 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination with CODE (621) Intelligent Light System (left-hand traffic) with CODE (622) Intelligent Light System (right-hand traffic) as of model year 2010/YoM 09 model refinement package
Shown on model 164.1
Location
One Xenon headlamp control unit is located on the underside of the left front lamp unit and the underside of the right front lamp unit respectively. The xenon headlamp control units are screwed to the housings of the front lamp units. The xenon headlamp control units are connected to the vehicle-side wiring harness via the lamp units.
Task
The xenon headlamp control units work in a master/slave combination and communicate with each other via the engine compartment CAN (CAN-C). As master the xenon headlamp control unit at the left front lamp unit synchronizes the xenon headlamp control unit at the right front lamp 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
- Engine compartment CAN
Direct line
In vehicles without code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS), the signals of the following sensors are read in by the xenon headlamp control unit at the left front lamp unit via a direct line:
- Right front level sensor (B22/9)
- Right rear level sensor (B22/10)
Engine compartment CAN
The signals are read in by the xenon headlamp control units via the engine compartment CAN. The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then 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])
- Dynamic curve illumination
- Active light distribution (model 164.8 as of 1.7.09 with 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) (model 164.8 as of 1.7.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))
Direct line
The following components are actuated by the xenon headlamp control unit at the left front lamp unit:
- Left bi-xenon light with integrated ignition module (E1e10)
- With code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination
- Left headlamp range adjustment motor (E1m1)
- Left dynamic curve illumination motor (E1m2)
The following components are actuated by the xenon headlamp control unit at the right front lamp unit:
- Bi-xenon light with integrated ignition module (E2e10)
- With code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination
- Right headlamp range adjustment motor (E2m1)
- Right dynamic curve illumination motor (E2m2)
LIN (model 164.8 as of 1.7.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))
The following components are actuated by the xenon headlamp control unit at the left front lamp unit via the LIN:
- Left headlamp range adjustment motor
- Left dynamic curve illumination motor
- Left light distribution cylinder motor (E1m3)
The following components are actuated by the xenon headlamp control unit at the right front lamp unit via the LIN:
- Right headlamp range adjustment motor
- Right dynamic curve illumination motor
- Right light distribution cylinder motor (E2m3)
| Wiring diagram for front signal acquisition and actuation module (SAM) control unit | Specification 2 | PE54.21-P-2114-99MAB |