Headlamp Control Unit, Basic Function - GF82.10-P-9890A

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Model All (CAR)

Overview

This document contains information on:

General
Function
Static I FH headlamps
Dynamic/digital LED headlamps

General

The headlamp control units are connected to the vehicle's network architecture. It operates in master-slave combination. As the master, the left headlamp control unit synchronizes the right headlamp control unit.

Daytime running lamps
Position lights
Turn signal lamp
High beams and headlamp flasher output
Automatic headlamp range control (HRA) (left headlamp control unit only) (except Canada version and USA version with static LED headlamps, right-hand traffic)
Variable light distribution
- Town light
- Country light and curve illumination
- Motorway light
- Enhanced fog light function (depending on equipment)
Cornering illumination
Thermal management (temperature monitoring)
On model 167, 177, the headlamp control units have supported variable light distribution via the headlamp range adjustment. As of market launch model 247, the headlamp control units completely control variable light distribution.

To implement the exterior lighting functions, the headlamp control units process, among others, the following information:
Variant coding
Circuit status
Engine running signal (vehicles with combustion engine).
Drivetrain operational signal
Vehicle level
Temperatures in the front lamp units
Light function request
Freeze frame data
Object information for automatic high beam (as of market launch of model 247)
The headlamp control units process these input factors and send, among others, the following information:
Requests for high beam light distribution
Light distribution status
Status of light functions
Show request for display messages.

Function

Static LED headlamps

The static LED headlamps are equipped with LED matrices which consist of a multiple-chamber reflector system with 4 individual reflectors for the high beam and low beam.

The headlamp control units actuate the following functions:

Daytime running lamps
Position lights
Turn signal lamp
High beams and headlamp flasher output
Automatic headlamp range control (HRA) (left headlamp control unit only) (except Canada version and USA version with static LED headlamps, right-hand traffic)
Thermal management (temperature monitoring)
To implement the exterior lighting functions, the headlamp control units process, among others, the following information:
Variant coding
Circuit status
Engine running signal (vehicles with combustion engine).
Drivetrain operational signal
Vehicle level
Temperatures in the front lamp units
Light function request
The headlamp control units process these input factors and send, among others, the following information:
Status of light functions
Show request for display messages.

Dynamic/digital L E D headlamps

The dynamic LED headlamps are equipped with LED matrices. These are equipped with several LEDs that can be actuated independently of one other. Depending on which LEDs are actuated, the shape and, depending on the version of the LED headlamps, the intensity of the light cone can be influenced.

As of market launch model 247, the headlamp control units assume the control of all light functions.

The headlamp control units actuate the following functions: