Front Multifunction Camera, Basic Function - GF54.71-S-9890A

Model All (Light transporter) 

With Code BA3 (Active Brake Assist System) 

With Code JA3 (Intelligent body control.) 

With Code JA9 (Traffic Sign Assist) 

With Code JB4 (Active lane keeping Assist) 

With Code JW5 (Lane keeping assist) 

With Code LG2 (LED Intelligent Light System) 

Example illustration of front multifunction camera 

Courtesy of MERCEDES-BENZ USA

Overview 

This document contains information on:

• General 
• Function 
  • Reading in of signals 
  • Evaluation of input factors 
  • Controlling of functions 
  • Actuation of component parts 
  • Transmission of signals and requests 
  • Structure 

General 

The multifunction camera is located at the top center of the windshield behind a trim.

Function 

The multifunction camera records information regarding the area in front of the vehicle such as, e.g. ambient brightness, object or traffic signs. These are evaluated by the integrated control unit, and used for implementing various functions.

This results in the following tasks:

• Reading in of signals
• Evaluation of input factors
• Controlling of functions
• Actuation of component parts
• Transmission of signals and requests

Reading in of signals 

The multifunction camera reads in, among other things, the following, partially forwarded, signals:

• Terminal status 15
• Engine running or drivetrain operational.
• Wheel speed
• Vehicle speed
• Vehicle lateral and longitudinal acceleration
• Information indicating driver activity, such as, e.g. turn signaling, accelerating, braking, steering
• Information indicating possible distraction of the driver, such as operation of the audio system, different comfort functions (interior lighting) and different menu levels in the instrument cluster.

Evaluation of input factors 

The input factors are evaluated by the integrated microprocessor and the corresponding component parts are actuated

Controlling of functions 

The multifunction camera controls the following functions:

• Lane Keeping Assist
• Traffic Sign Assist
• High beams assistant

The multifunction camera evaluates light sources in front of the vehicle.

Actuation of component parts 

To avoid any fogging in the multifunction camera's field of view, the windshield is heated in this area by a heater field. The heater field is directly actuated by the multifunction camera.

Transmission of signals and requests 

The multifunction camera transmits the following signals and requests among other things:

• Ambient brightness
• Actuate steering wheel vibration motor.
• Actuate partial high beam and perform optical headlamp range control.
• Display traffic signs.

Structure 

The multifunction camera consists of the following main components:

• Camera head
• Electronic analysis system (control unit)
• Multifunction camera windshield heater field

After replacement of a multifunction camera or the windshield the multifunction camera has to be recalibrated.

	Component descriptions
	Component description for multifunction camera	Model 447 with code JA3 (Intelligent Body Control) with code JB4 (Active Lane Keeping Assist) with code XM7 (Facelift II)	GF54.21-S-3300A