Left Front Turn Signal Bulb
M5
Sidemarker2)

Left Daytime Running Lamp and
Position Lamp LED Module
L176

Left HID Headlamp Control Module
J343
Left Daytime Running Lamp and
Position Lamp Control Module
J860

610_048

Light functions

Illuminants used

Power

Daytime running light

2 LEDs with plastic optical fibres

18 watts

Parking light

dimmed to approx. 25 %

Low beam

Gas discharge lamp D3S

35 watts

Turn signal

Bulb PSY24W

24 watts

Sidemarker2)

LED

0.6 watts

High beam (change-over by shutter)

Activation mechanism
The functions of the bi-xenon headlights are activated by
Vehicle Electrical System Control Module J519. The
Daytime Running Light for the side on which a turn is being
made are switched off for the duration of the turn signal
activation.
Left and Right Low Beam Headlamp Reflector Motors V294
and V295 are used to change over between low and high
beam operation.

30

LED headlights
PR no.: 8IT
All light functions are performed by LEDs. No fog lights are
fitted in models equipped with LED headlights. The allweather light function is available as a substitute.

Left headlight range
servomotor

Parking light / daytime running light /
turn signal

Cornering light

Left headlight fan

Low beam
Sidemarker2)
High beam

LED control unit
(Parking light, daytime
running light, turn signal,
sidemarker2))

Headlight range control
power module
LED power module
(Low beam, High beam,
cornering light, fan activation)

610_051

Light functions

Illuminants used

Power

Daytime running light

4 LEDs (1x 3 LED chip, 1x 1 LED chip)

14 watts

Parking light

dimmed to approximately. 15 %

Low beam

9 LEDs (2x 5 LED chip, 2x 2 LED chip)

41 watts

High beam

8 LEDs (2x 4 LED chips)

36 watts

Cornering light

4 LEDs (2x 2 LED chips)

18 watts

Turn signal

4 yellow LEDs (1x 3 LED chip, 1x 1 LED chip)

16 watts

LED

0.6 watts

Sidemarker

2)

31

Headlight range control
Dynamic headlight range control
Vehicles with gas discharge headlights or LED headlights
are equipped with a dynamic headlight range control
system. Depending on the altitude and movement of the
vehicle, headlight range control servomotors V48 and V49
correct the range of the headlights.

The headlight range control configurations described below
are available for the bi-xenon headlights and the bi-xenon
headlights with adaptive light.

Convenience CAN bus

Schematic diagram of the activation mechanism for bi-xenon headlights

Bi-xenon headlight
(left-hand side of vehicle)

Discrete lines
Vehicle Electrical
System Control
Module
J519

Discrete lines

Extended CAN bus

Headlamp Range
Control Module
J431

Left Daytime Running Lamp and Position Lamp Control Module
J860
Left Front Turn Signal Bulb M5
Left HID Headlamp Control Module J343

Left Headlamp Beam Adjustment Motor V48

Discrete line
610_061

Left Rear Level Control System Sensor
G76

Extended CAN bus

Convenience CAN bus

Schematic diagram of the activation mechanism for LED headlights

LED headlights
(left-hand side of vehicle)
Discrete lines
Vehicle Electrical
System Control
Module
J519

Cornering Lamp and
Headlamp Range
Control Module
J745

Private CAN bus (sub-bus)

LED control unit
(Parking light and daytime running light / turn signal)
(Sidemarker with SAE1))

LED power module
(Low beam, High beam and cornering light)

Discrete lines
Discrete line

Left Rear Level
Control System
Sensor
G76

Left headlight fan

Headlight range control power module

Discrete lines
Left headlight range control servomotor

32

610_063

Headlight range control in vehicles with wheel damping electronics Audi
magnetic ride
The 2015 S3 can be optionally equipped with Audi magnetic ride. These vehicles have four level sensors to
monitor vehicle ride height. Electronic Damping Control
Module J250 monitors the level sensors through discrete
wires.

J250 communicates over the Suspension CAN and transfers
information about vehicle ride height to the headlight
range control module of the particular headlight system
installed.

Schematic diagram of the activation mechanism for vehicles with Audi magnetic ride

Headlamp Range Control Module 1

Data Bus On Board Diagnostic
Interface
J533

Cornering Lamp and Headlamp
Range Control Module J745 2

Discrete line

Private CAN
bus (sub-bus)

Headlight range control
servomotors1)

Power module for headlights2)

Extended CAN bus

Suspension CAN bus

Discrete line

Headlight range control
servomotors2)

Cornering Lamp and Headlamp
Range Control Module J745 3

Private CAN
bus (sub-bus)

Power module for headlight range
adjustment3)

Discrete line

Headlight range control
servomotors3)

Electronic Damping Control Module J250

Discrete lines

Left Front Level Control System Sensor
G78

Right Front Level
Control System
Sensor
G289

Left Rear Level Control System Sensor
G76

Right Rear Level
Control System
Sensor
G77

610_064

with bi-xenon headlights
with bi-xenon headlights with adaptive light (not for the North American region)
3)
with LED headlights
1)
2)

33

Tail lights
LED tail light
PR no.: 8SK
LED tail lights are standard equipment on the Audi A3 for
the North American region. They are activated by Vehicle
Electrical System Control Module J519.

The bulbs of the rear hatch light can be accessed via a
service flap. LEDs cannot be replaced. If faulty, the tail light
in question must be replaced.

The tail lights are also activated if the vehicle is equipped
with a Coming Home / Leaving Home function. The rear fog
light and the reversing light are deactivated when the rear
hatch is opened.

Turn signal

Back-up light

Brake light

610_066

Tail light

Light functions

Illuminants used

Activation mechanism

Power

Brake light

9 LEDs

100 %

approx. 3.5 watts

Tail light

2 LEDs with plastic optical fibres

100 %

approx. 2 watts

Turn signal

20 LEDs

100 %

approx. 3.5 watts

Back-up light

Bulb H6W

100 %

6 watts

34

High-mounted brake light
The high-mounted brake light is attached to the rear
window. It has a total of 48 LEDs. The component parts
cannot be replaced. If defective, the entire module must
be replaced.

The component parts of the high-level brake light cannot
be replaced. If faulty, the complete component must be
replaced. This is only possible after removing the rear
spoiler.

610_067a

High level brake light
M25

License lights
The license plate lights for the 2015 A3 sedan feature LED
technology. Both lights house two LEDs. As with the highmounted rear brake light, they are activated by Vehicle
Electrical System Control Module J519.

610_068

35

eSelf Study Programs
For further information about the technology of the The 2015 Audi A3, refer to the following eSelf Study Programs.

eSelf Study Program 990143

eSelf Study Program 970343

The 2015 Audi A3 Introduction

The 2015 Audi A3 Vehicle Electronics
and Driver Assistance Systems

610_078a

SSP 990143
The 2015
Audi A3 Introduction

2

610_079

SSP 970343
The 2015 Audi A3 Vehicle
Electronics and Drivers
Assistance Systems

610_080a

SSP 960143
The 2015 Audi A3 Running
Gear and Suspension Systems

36

Notes

37

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 “970243 - The 2015 Audi A3 Onboard Power Supply and Networking“
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.

38

970243
All rights reserved.
Technical specifications are
subject to change without notice.
Audi of America, LLC
2200 Ferdinand Porsche Drive
Herndon, VA 20171
39