The LTE antenna 1 is designed as a transmitting and receiving antenna. It is also responsible for the operation in the
UMTS/GSM network. LTE antenna 2 is only a receiver
antenna for LTE.
When travelling in an area that has only a UMTS/GSM
network available, LTE antenna 1 switches its role to receiving those signals. Once the vehicle is in an area where LTE
coverage is available, LTE antenna 2 assumes the reception
duties.

Antenna 1
LTE/UMTS/GSM

Antenna 2
LTE

Information Electronics Control Module 1 J794 with LTE antennas.

625_129

Note

The LTE module is used only for data receiving. To use a mobile phone it must be connected to J794 using the
Hands Free Profile (HFP).
78

Reception indicator
The LTE data module can exchange data via the LTE as well
as via the UMTS or GSM network.
The following displays of signal strength and the current
network connectivity are shown:

•
•
•
•

2 G GSM network with EDGE (max 220 kbit / s)
3 G UMTS network with HSPA (up 7.2 Mbit / s)
4 G UMTS network with HSPA + (max. 21 Mbit / s)
LTE 4 G LTE network (max. 100 Mbit / s)

618_074a

Diagnosis
If Antenna 1 fails, it is no longer possible to send or receive
data.
In antenna 2 fails, the data rate in the LTE mode may be
restricted.
Both antennas are monitored by Self-diagnosis. A DTC
entry is made in the event of failures.
.

79

Notes

80

Antenna overview
The aerials in the 2015 Audi A3 are distributed across the
rear window and the roof aerial R216. The boosters for the
aerials in the rear window and in the rear spoiler are
mounted to the rear hatch.
The boosters for the antennas in the rear window are
mounted under the C-pillar trim panel.

SDAR antenna

Antenna amplifier 2
R111

FM Connection

Antenna amplifier 3
R112

81

Roof aerial R216
(North America)
SDARS (Satellite Radio)
Telephone

Navigation

609_112

Roof Antenna
R216

AM antenna

Antenna amplifier
R24

FM1/AM connection

Antenna amplifier 4
R113

625_131

82

LTE antennas
The Audi’s A3 sedan with Audi connect has two LTE antennas mounted on the inside of the rear bumper.

83

Information Electronics Control Module 1
J794

Roof Antenna
R216

GSM Antenna 2
R267

GSM Antenna
R205

625_132a

84

Sound systems
The Audi sound system is standard equipment for the 2015
A3 sedan. It features nine speakers and a hat-shelf
mounted sub-woofer. The audio amplifier is integrated
with Information Electronics Control Module J794 and has
a total power output of 180 watts.

Audi sound system

Center speaker
R208

Treble loudspeaker
front left
R20

Bass loudspeaker
front right
R23

Treble loudspeaker
rear left
R14

Bass loudspeaker
front left
R21

85

Treble loudspeaker
rear right
R16

Treble loudspeaker
front right
R22

Bass loudspeaker
rear right
R17

Sub-woofer
R211
Bass loudspeaker
rear left
R15

609_109a

The optional Bang & Olufsen Sound System delivers a total
power output of approximately 705 watts.
With its 5.1 Surround Sound speakers,it provides excellent
sound quality. The external Bang & Olufsen audio amplifier
(Digital Sound System Control Module J525) powers a total
of 13 loudspeakers and the sub-woofer through its 15
channels. The sub-woofer is driven through two channels.

The external audio amplifier is installed under the left front
seat. It is connected to Information Electronics Control
Module J794 via the MOST bus. When the Bang & Olufsen
system is installed, both bass front speakers in the doors
are highlighted by indirect LED lighting controlled by the
door control modules.
The subwoofer is located under the rear hat-shelf.

Audi A3 sedan with Bang & Olufsen Sound System

Center Speaker
R208

Right Front Bass
Speaker
R23
Right Front Treble
Speaker
R22

Left Front Bass
Speaker
R21

Left Front Treble
Speaker
R20

Digital Sound
System Control
Module
J525
Left Front Midrange
Speaker
R103

Right Front Midrange
Speaker
R104

Right Rear Treble
Speaker
R16

Left Rear Treble
Speaker
R14

Left Rear Bass
Speaker
R15

Right Effects
Speaker
R210

Right Rear Bass
Speaker
R17

Sub-woofer
R211

Left Effects Speaker
R209
625_133

86

Service
Service interval overview for North American region
Service recommendations can be viewed through the MMI.

•
•
•

Oil change service
Mileage based service events
time based service events

Flexible service event
(ROW)

Mileage based service event

Time based service event

625_073a

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oil
and

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Oil

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nge

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Ins

pec

vic
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ice
ns
er v

vic
e
ser
Oil

cha
nge

tio
Ins

pec

Oil

cha
nge

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er v

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e

ice

and

oil

cha

nge

The first recommended oil change for A3 sedans in the
North American region is at 5000 mi (8000 km) or at one
year from the date of delivery. An oil change and inspection service is recommended at 15,000 mi (24,000 km) Oil
change service is recommended 10,000 mi (16,000 km)
thereafter with. See the chart below.

5000 mi (8000 km)
1 year

15,000 mi (24,000 km)
2 years

25,000 mi (40,000 km)
3 years

35,000 mi (56,000 km)
4 years

45,000 mi (72,000 km)

625_080

87

Special tools and workshop equipment

T10172 with T10172/11

609_159

T10489

609_160

609_161

Tensioning the timing belt

Disconnecting the high-pressure pump drive gear

T10491

T10493

609_163

609_165

Removing and installing the oxygen sensor

Installing the camshaft seal

T10503

T10502

609_151

609_152

For use with reversible ratchet attachment for bits VAS 6784

Installing the protective cap on the brake caliper housing

VAS 6748

VAS 6338/38

609_178

Removing and installing the Airbag Control Module,
in combination with T10503

609_179

Flushing the air conditioner refrigerant system

88

T10383

VAS 6416

625_144

625_143

Removing the selector lever and/or selector indicator gasket

Removing the center console trim

T10490

T10501

625_140

625_142

Crankshaft lock. Used on 1.8L and 2.0L EA88 third
generation engines.

Turbocharger removal and installation

T10492

VAS 6606 bridge, 198 pin -1VAS 6606/10 Test adapter -21

2

2

625_141

Locking pins. Used to lock the high pressure pump during
removal/installation on second generation 2.0L TDI
engine.

89

625_139

For diagnosing control modules with 198 pin connectors
(UDS control modules)

Notes

90

Self Study Program

eSelf-Study Program 920243

SSP 920243
Audi 1.8L and 2.0L Third
Generation EA888 Engines

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

The Audi 1.8L and 2.0L Third Generation
EA888 Engines

1

SSP 970143
Modular Infotainment Platform
(MIB)

eSelf Study Program 960143

SSP 960143
The 2015 Audi A3 Running Gear
and Suspension Systems

The 2015 Audi A3
Running Gear and Suspension System

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

91

SSP 920143
The Audi 2.0L Third Generation
TDI Engine

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 “990143 - Audi A3 Introduction”

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.

92

990143
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Technical specifications are
subject to change without notice.
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2200 Ferdinand Porsche Drive
Herndon, VA 20171