Signal lights actuation module, component description - GF82.10-P-2150CE

MODEL 204.0 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) as of model year 2012/YoM 11 model refinement package

MODEL 204.2 with CODE (621) Intelligent Light System (left-hand traffic) with CODE (622) Intelligent Light System (right-hand traffic) as of model year 2012/YoM 11 model refinement package

MODEL 204.3 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)

MODEL 204.9 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (621) Intelligent Light System (left-hand traffic) with CODE (622) Intelligent Light System (right-hand traffic) as of model year 2013/facelift 12

Shown here is the lamp unit in model 204.0

Fig 1: Identifying Signal Lights Actuation Module Components

Courtesy of MERCEDES-BENZ USA

Location

An LED, signaling lights actuation module is fastened on each underside (model 204.0/2/3) or on the inside (model 204.9) of the left front lamp unit and the right front lamp unit.

Task

The LED, signaling lights actuation modules have the following tasks:

Provide and monitor operating voltage and operating current of the actuated light-emitting diodes (LED)
Actuation of the LEDs in the corresponding front lamp unit to output the light functions:
- Standing lights
- Parking lights
- Turn signal lights
Thermal management (temperature monitoring)

The LED, signaling lights actuation modules actuate the LEDs located in the front lamp unit to implement the individual light functions.

The LEDs are each connected in series.

The LED, signaling lights actuation modules are supplied with voltage by the front SAM control unit with fuse and relay module (N10/1) (circuit 30L).

The individual light functions are output after applying voltage at the respective input channel of the LED, signaling lights actuation module. This occurs through the front SAM control unit.

The front lamp units are equipped with temperature sensors at the LED chains. The LED, signaling lights actuation modules evaluate the data of the temperature sensors.

If there is danger of the LEDs or the plastic housing of the front lamp units overheating, the LED, driving lights actuation modules reduce the actuating currents and thus lower the heat development.

Identified malfunctions of individual components are stored in a nonvolatile memory. The LED, signaling lights actuation modules can be diagnosed via the headlamp control unit (N71/1).

Exterior lights wiring diagram

PE82.10-P-2000-97FAD