611_030

Installation location of Rearview Camera System Control Module J772
The back-up camera is located in the rear trunk lid handle
where it monitors the area behind the vehicle.
A semi-conductor chip in the camera is used to capture the
images. The image capture sensor uses CMOS technology
and captures color images with a horizontal resolution of
64 pixels and vertical resolution of 492 pixels.

The camera lens has a dirt repellent coating. The driver can
tell if the lens is dirty by the deterioration of the image
quality in the display. It is the responsibility of the driver to
ensure the lens is cleaned when dirty.

611_029

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System implementation

Information
Electronics Control
Module 1 J794

Low line

Terminal 30

High line

Terminal 30

Infotainment CAN bus

Rearview Camera
System Control
Module J772

Power supply
Camera

Rearview
Camera R189

Camera ground

Shielding

Shielding

Video line

Video line

611_031

Rearview Camera R189 is powered by Rearview Camera
System Control Module J772. The camera image is transferred from R189 to J772 by a shielded wire.
The incoming raw image is distorted due to the shape and
position of the camera lens. It is corrected by control
module J772. J772 also adds guide lines and areas to the
camera image.

The corrected image is then transferred to Information
Electronics Control Module 1 J794 by video line. To transfer
control commands and required vehicle information, both
J772 and J794 are connected to the Convenience CAN.
In order to maintain a high quality image display for the
customer it is necessary after certain repairs to calibrate
the system.

Reference
For further information on the back-up camera, refer to eSelf Study Program 996603 The Audi Q7 - Driver’s Assistance
Systems.".
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Audi parking system
The Audi parking system for the 2015 A3 consists of front
and rear acoustic sensors. The feature (7X2) is optional on
the A3 Premium plus with the Driver assistance package
and standard equipment on the A3 Prestige.

611_032

System implementation

Convenience CAN Low

Convenience CAN High

Terminal 15

Parking Aid Control Module J446

611_033a

Key:
E266
G203
G204
G205
G206
G252
G253

Parking aid button
Left Rear Parking Aid Sensor
Left Rear Center Parking Aid Sensor
Right Rear Center Parking Aid Sensor
Right Rear Parking Aid Sensor
Right Front Parking Aid Sensor
Right Front Center Parking Aid Sensor

G254
G255

Left Front Center Parking Aid Sensor
Left Front Parking Aid Sensor

H15
H22
J791

Rear Parking Aid Warning Buzzer
Front Parking Aid Warning Buzzer
Parallel Parking Assistance Control Module J791

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Audi side assist

Lane Change Assistance
Control Module J769

Lane Change Assistance
Control Module 2 J770

611_036

The purpose of the Audi side assist is to monitor the areas
behind and to the sides of the vehicle using radar sensors.
There is a dedicated radar sensor on each side of the
vehicle.

If Audi side assist detects a critical situation which could
result in an accident if the driver were to change lanes, the
system warns the driver by intensive flashing of warning
lights in the outside door mirror. The warning light in the
mirror of the side where the hazard has been detected
flashes.

Reference
For more information about Audi side assist, please see eSelf-Study Program 996603, Audi Q7 - Driver’s Assistance Systems.

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System operation
Lane Change Assistance Control Module J769 is the master
control module for the system function. It participates on
the Extended CAN bus. J769 monitors the right side of the
vehicle.

Lane Change Assistance Control Module 2 J770 is a slave
module and communicates with J769 via a private CAN bus.
J770 is responsible for activating both Audi side assist
warning lamps in the door mirrors.

Terminal 15

Lane Change
Assistance
Control Module
J769

CAN Private High
CAN Private Low

Lane Change
Assistance
Control Module 2
J770

Lane Change Assistance Warning Lamp
in Driver Exterior
Rearview Mirror K233

Low line

High line

Lane Change Assistance Warning Lamp
in Front Passenger
Exterior Rearview
Mirror K234

Extended CAN bus

Audi side assist is activated and de-activated through the
MMI. There is no separate switch.

611_038

System preferences are saved to the driver’s key.

611_039a

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Driver Assistance Systems Front Camera R242
R242 has been upgraded. It now has an additional red light
detector. The camera has a resolution of 1024 x 512 pixels
and an aperture angle of 46 degrees. It is supplied by
Bosch.

The camera also has a new internal image processing
control unit that eliminates the need for an additional
processing module.

611_040

In the North American region, Driver Assistance Systems
Front Camera R242 is used for the following systems:

• Audi active lane assist
• Adaptive cruise control (ACC)

!
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Note
After making certain repairs to the vehicle or replacing Driver Assistance Systems Front Camera R242, it must be calibrated
using VAS6430. Please refer to the current repair literature for complete details.

Influence of R242 on the ACC function
Driver Assistance Systems Front Camera R242 allows the
Adaptive cruise control system to respond predictively to
traffic situations.
This improvement is achieved by monitoring the positions
of vehicles driving ahead. By continuously monitoring the
traffic, the system can tell when a vehicle driving ahead in
the same lane is about to change lanes.

The system can tell whether a vehicle driving ahead is
about to change from an adjacent lane to its own lane. This
information is factored into the ACC control algorithm,
resulting in smoother and more predictive control
response.

R242 electrical connections
A new CAN bus called CAN sensor is used for exchanging
data between R242 and Distance Regulation Control
Module J428.

Directional Stabilization Assistance Windshield Defogger
Z67 is also connected to R242. It is used to remove condensation and ice from the camera lens when needed.

Control units R242 and J428 are also extended CAN bus
users.

Terminal 15

Terminal 15

Extended CAN bus High

Audi lane assist
windscreen
heater
Z67

Extended CAN bus Low

Driver Assistance
Systems Front
Camera R242

CAN Sensor High

Distance Regulation
Control Module
J428

CAN Sensor Low

611_041

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Audi lane assist and active lane assist
Overview
Audi lane assist was first introduced in 2007. Lane departure systems warn the driver if their vehicle approaches a
detected lane boundary marker (lane marker) and is likely
to leave its lane. Lane markers are detected using a windshield mounted camera. In the first generation Audi lane
departure system, which is still used on some Audi models,
the driver is warned through steering wheel vibration.
However, if a turn signal indicator is set before crossing the
lane marker, the warning is suppressed. The system
assumes the lane change is deliberate. The system is
designed for driving on larger highways or expressways at
speeds greater than 40.3 mph (65 km/h).
In some situations, Audi lane assist may not detect lane
markers or activate warnings. In poor ambient conditions,
dirty or snow covered roads can prevent the system from
issuing warnings. Ambiguous lane markings that might be
expected in areas of road construction may also prevent the
system from issuing warnings.

483_022

Further development
A next generation Audi lane assist system debuted on the
2011 A8. Functionality was enhanced so that lane departure warnings are issued even if only one lane marker is
detected. Turning into a corner sharply no longer led to a
warning, even if a lane marker was touched or briefly
crossed.
In addition, a higher resolution camera capable of distinguishing between yellow and white lane markers is now
part of the Audi lane assist system.

461_002

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Active lane assist
Audi active lane assist is made possible through the development of electro-mechanical steering. Active lane assist
becomes active at a speed of 40mph (65 km/h). It detects
lane markings on the roadway based on images from a
small video camera mounted on the rear-view mirror. If a
vehicle approaches a lane marking without activating the
turn signal, the system assists the driver in steering back
into the lane by making a slight intervention through the
electromechanical power steering system.

612_017

Active lane assist features of the A3 Sedan
The Audi active lane assist system in the 2015 Audi A3
sedan has the following features:
•

Steering intervention through the electromechanical
power steering system motor

•

Steering wheel vibrations can be enabled/disabled
through the MMI

•

A system mode that uses continuous steering intervention to assist the driver in keeping the vehicle in the
center of their lane

•

A system mode that assists the driver in preventing
inadvertent lane departures when approaching a lane
marker

•

Warning vibrations are generated by the electromechanical power steering system motor

•

The master control function of the system is through
Driver Assistance Systems Front Camera R242

Audi lane assist and Audi active lane assist are driver assistance systems. They support the driver in preventing inadvertent lane departures but ultimately, it is the driver’s
responsibility for remaining in their lane.

42

Audi steering intervention
Steering intervention on the Audi A3 sedan is based on a
control module response referred to as “corrective steering
input late.” With this steering mode, corrective inputs are
not made until the vehicle has already moved close to a
lane marker. This is the only mode available on A3 sedan
models sold in the North American region.
Corrective steering input "late"

Steering torque requirement

611_043

Additional functions

483_031

Audi active lane assist requires the driver to keep their
hands on the steering wheel at all times. Recognition of
hands-free driving is made based on signals from Steering
Torque Sensor G269. If hands-free driving is recognized,
the lane assist function is deactivated temporarily, and the
function lamp in the DIS changes color from green to
yellow. Once the driver grips the wheel again, the system is
reactivated.

43

Operation
Active lane assist is switched on and off using the button on
the end of the turn signal stalk.

611_043a

When the system is switched on and is active, the green
highway symbol will appear in the instrument cluster.

611_043b

The vibration warning can be switched on or off via the MMI.

611_043c

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Self Study Programs
For further information about the technology in the Audi A3 ’13, refer to the following eSelf Study Programs.

SSP 970203
The 2011 Audi A8 Driver
Assistance Systems

SSP 990603
The 2012 Audi A7 Occupant Protection, Infotainment, Climate Control,
and Head-Up Display

SSP 990503
The 2012 Audi A7 Convenience Electronics and
Audi Active Lane Assist

eSelf Study Program 990143

eSelf Study Program 960143

The 2015 Audi A3 Introduction

The 2015 Audi A3
Running Gear and Suspension System

SSP 990143
The Audi 2015 A3
Introduction

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SSP 970243
The 2015 Audi A3
Onboard Power Supply
and Networking Systems

SSP 960143
The 2015 Audi A3 Running
Gear and Suspension
System

Knowledge Assessment
An On-Line Knowledge Assessment (exam) is Available for this eSelf-Study Program.
The Knowledge Assessment is required for Certification.
You can find this Knowledge Assessment at:
www.accessaudi.com
From the accessaudi.com Homepage:

•

Click on the “ACADEMY” tab

•

Click on the “Academy site” link

•

Click on the Course Catalog Search and select
“970343 - The 2015 Audi A3 Vehicle Electronics and Driver Assistance Systems”

Please submit any questions or inquiries via the Academy CRC Online Support Form
which is located under the “Support” tab or the “Contact Us” tab of the Academy CRC.

Thank you for reading this eSelf-Study Program and taking the assessment.

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970343
All rights reserved.
Technical specifications are
subject to change without notice.
Audi of America, LLC
2200 Ferdinand Porsche Drive
Herndon, VA 20171
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