Table of Contents
F01 KAFAS
Subject Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Multifunction Video Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Lane Departure Warning and High-beam Assistant . . . . . . . . . . . . . . . .5
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Functional Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Lane Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Roadway Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Physical Limitations of the Optical System . . . . . . . . . . . . . . . . . . . .16
Display and Control Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Lane departure warning displays . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Displays of the lane departure warning/
Active Cruise Control with Stop & Go . . . . . . . . . . . . . . . . . . . . . .18
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Signal path for controlling the vibration actuator . . . . . . . . . . . . .21
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Operation and Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Detection of Light in the Field of View of the Video Camera . . . . .26
Evaluation of Image Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Control of the High-beam Headlights . . . . . . . . . . . . . . . . . . . . . . . . . .29
System limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Low-sensitivity Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Check Control Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Initial Print Date: 01/09
Revision Date:
KAFAS
Model: F01/F02
Production: From Start of Production
After completion of this module you will be able to:
• Describe the systems that are part of the KAFAS system
• Understand the Headlight Assistant (FLA) on the F01/F02
• Understand the Lane Departure warning on the F01/F02
• Identify the components of the KAFAS system
2
F01 KAFAS
Introduction
Multifunction Video Camera
With the F01/F02, the customer is able to choose from a comprehensive range of
optional driver assistance systems.
The individual systems and function units are becoming ever more densely networked
as a result of the shared use of components and signals in some areas.
Depending on the combination of the available options installed, the functions in the
F01/F02 are implemented as camera-based systems, both sharing the same camera
and the one control unit, the KAFAS control unit.
KAFAS is the Camera Assisted Driver Assistance System.
KAFAS is used for the following combined functions:
• Lane departure warning
• High-beam assistant.
3
F01 KAFAS
FLA (high beam assistant) is part of the ZDA Driver Assistance Package option and will
not be available separately on the F01/F02.
The ZDA Driver Assistance Package option includes the following:
• High-beam Assistant
• Lane Departure Warning
• Active Blind Spot Detection
The vehicle comes fitted with the KAFAS control unit and camera. The high-beam assistant option shares the KAFAS camera and the KAFAS control unit with the lane departure
warning system.
Options/Technical
specification
4
F01 KAFAS
Lane departure
warning
High-beam
assistant
KAFAS
1 camera
1 control unit
2 functions
X
X
System Overview
Lane Departure Warning and High-beam Assistant
The overview below illustrates the components used in combining these systems.
System overview of KAFAS components
5
F01 KAFAS
System overview of KAFAS components legend
Index Explanation Index Explanation
1
2
3
4
5
6
7
8
9
Lane departure warning/High-beam assistant
forward-pointing video camera
KAFAS control unit
(Equipment specification with lane
departure warning, evaluation of image data)
Driver assistance systems operating unit
Lane Departure Warning on/off button
Footwell module (FRM)
High-beam headlights on/off
Light switch
(High-beam assistant function in
position A or position II)
High-beam assistant on/off button on the turn
signal stalk on the steering column
Steering column switch cluster (SZL) with turn
signal stalk on the steering column
Integrated Chassis Management (ICM)
Road-speed signal
Central gateway module (ZGM)
10
11
12
13
14
15
16
17
Instrument cluster
Function display
Head-up display (HUD)
Function display
Controller
Car Information Computer (CIC)
navigation system, navigation system data
Central Information Display (CID)
Junction box electronics
Front distribution box
Car Access System (CAS)
6
F01 KAFAS
Circuit diagram KAFAS with lane departure warning and high-beam assistant
7
F01 KAFAS
Circuit diagram KAFAS with lane departure warning and high-beam assistant legend
Index Explanation Index Explanation
1
2
3
4
5
6
7
8
9
Lane departure warning/ High-beam assistant
forward-pointing video camera
KAFAS control unit
(Equipment specification with lane
departure warning, evaluation of image data)
Driver assistance systems operating unit
Lane Departure Warning on/off button
Footwell module (FRM)
High-beam headlights on/off
Light switch
(High-beam assistant function in
position A or position II)
High-beam assistant on/off button on the turn
signal stalk on the steering column
Steering column switch cluster (SZL) with turn
signal stalk on the steering column
Integrated Chassis Management (ICM)
Road-speed signal
Central gateway module (ZGM)
10
11
12
13
14
15
16
17
Instrument cluster
Function display
Head-up display (HUD)
Function display
Controller
Car Information Computer (CIC)
navigation system, navigation system data
Central Information Display (CID)
Junction box electronics
Front distribution box
Car Access System (CAS)
8
F01 KAFAS
System Components
Lane Departure Warning
In the F01/F02, a front facing video camera and the corresponding button in the BEFAS
control panel indicate that the vehicle is equipped with the lane departure warning.
Video camera for lane departure warning
Driver assistance control panel with lane departure warning
9
F01 KAFAS
The image data recorded by the video camera are transmitted to the KAFAS control unit
along an LVDS data line. The video camera and the control unit are the components that
are fundamental to the lane departure warning’s range of functions.
KAFAS control unit and video camera in the F01/F02
Index Explanation Index Explanation
1
KAFAS control unit with
PT-CAN
2
Lane departure warning video
camera with LVDS connection
to KAFAS control unit
Index Explanation Index Explanation
1
KAFAS control unit Driver's footwell
10
F01 KAFAS
2
Central gateway module (ZGM)
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