SSP 610 Audi A3 '13 Onboard Power Supply and Networking_EN

August 4, 2017 | Author: firefly123 | Category: Headlamp, Automotive Technologies, Automotive Industry, Automobiles, Technology
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Descripción: Audi A3 '13 Onboard Power Supply and Networking...

Description

610

Audi Vorsprung durch Technik

Self Study Programme 610 For internal use only

Audi A3 ’13 Onboard Power Supply and Networking

All rights reserved. Technical specifications are subject to change. Copyright AUDI AG I/VK-35 [email protected] AUDI AG D-85045 Ingolstadt Technical status 04/12 Printed in Germany A12.5S00.94.20

Audi Service Training

Whether the engine fuel system, the dual clutch gearbox, the infotainment system or any one of a number of driver assistance systems – a modern vehicle would cease to function without electrical and electronic equipment. A high-performance alternator, a battery rated for the vehicle's specification, and reliable and fast data transfer across various data bus systems are all vital components of a stable and efficient onboard power supply system.

The first part of this self study programme summarises the onboard power supply of the Audi A3 ’13 and provides information on the functions, installation locations and specific features of numerous control units. The design and function of the various headlight and tail light versions are described in "Exterior lighting". This is a quick and direct way to obtain an in-depth knowledge of the electrical and electronic equipment in the Audi A3 ’13.

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Learning objectives of this Self Study Programme: After you have worked your way through this Self Study Programme, you will be able to answer the following questions: • Where are the fuseholders located in the Audi A3 ’13 and what are their designations? • Where are electrical components fitted in the vehicle?

2

• Which bus systems are used in the Audi A3 ’13? • What are the tasks of the control units in the vehicle? • What are the versions of the exterior lighting and how are the individual light functions implemented? • What are the versions of the headlight range adjustment system?

Contents Power supply Battery _______________________________________________________________________________________________________________________________________________________ 4 Battery housing _____________________________________________________________________________________________________________________________________________ 4 Fuses, relays and jump start terminal ____________________________________________________________________________________________________________________ 5

Networking Installation locations of control units ____________________________________________________________________________________________________________________ 6 Topology _____________________________________________________________________________________________________________________________________________________ 8 Overview of bus systems __________________________________________________________________________________________________________________________________ 10 New features of the bus system __________________________________________________________________________________________________________________________ 10 Optical data bus system MOST150 _______________________________________________________________________________________________________________________ 11 Optical replacement control unit VAS 6778 _____________________________________________________________________________________________________________ 11

Control units Brief descriptions __________________________________________________________________________________________________________________________________________ 12

Exterior lighting Light switch _________________________________________________________________________________________________________________________________________________ 29 Headlights __________________________________________________________________________________________________________________________________________________ 30 Fog light ____________________________________________________________________________________________________________________________________________________ 35 Headlight range control ___________________________________________________________________________________________________________________________________ 37 Tail lights ____________________________________________________________________________________________________________________________________________________ 40 High-level brake light ______________________________________________________________________________________________________________________________________ 42 Number plate lights _______________________________________________________________________________________________________________________________________ 42

Annex Self Study Programmes ___________________________________________________________________________________________________________________________________ 43

• The Self Study Programme teaches a basic knowledge of the design and functions of new models, new automotive components or new technologies. It is not a Repair Manual! Figures are given for explanatory purposes only and refer to the data valid at the time of preparation of the SSP. For further information about maintenance and repair work, always refer to the current technical literature.

Note

Reference

3

Power supply Battery In the Audi A3 ’13, the vehicle battery is housed in the engine bay and protected by a battery box. Battery size and type are dependent on engine version, trim and country specification. Standard batteries, EFB batteries and AGM batteries are used.

Vehicles with petrol engines and a start-stop system are equipped with an EFB battery, while vehicles with diesel engines and a start-stop system are equipped with an AGM battery. Vehicles with an auxiliary heater generally have an AGM battery.

EFB

AGM battery

An EFB (Enhanced Flooded Battery) can be regarded as a heavyduty wet-cell battery. The positive plate inside the battery is coated with an additional polyester scrim. This provides additional hold for the active battery material. The deep-cycle resistance is higher than that of conventional batteries. An EFB is charged in exactly the same way as a conventional battery.

In AGM (Absorbent Glass Mat) batteries, the battery electrolyte is held within a microporous glass matting. In addition to having higher deep-cycle resistance than an EFB battery, the AGM battery is noted for its leak-proof construction. When charging an AGM battery, it is important to follow the charger's operating instructions and, where applicable, to program the charger for AGM batteries.

The following batteries are used in the Audi A3 ’13: Standard batteries

EFB

AGM batteries

• • • • •

• 59 Ah/280 A • 69 Ah/360 A

• 58 Ah/340 A • 68 Ah/380 A

44 Ah/220 A 51 Ah/280 A 60 Ah/280 A 61 Ah/330 A 72 Ah/380 A

Battery housing The housings of the batteries used in the Audi A3 ’13 vary in length. On the battery bracket there are holes for three different lengths of battery housing.

Hole

Battery housing length

1

212 mm

2

247 mm

3

278 mm

Hole 1 Hole 2

Hole 3

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Fuses, relays and jump start terminal Jump start terminal on the engine bulkhead

The battery's positive terminal and the jump start terminal on the engine bulkhead are used for battery charging and jump starting.

Ground terminal with battery monitor control unit J367

Battery positive

Battery Fuse rail on the e-box Designation of fuses in current flow diagram "SA"

e-box with fuses and relays Designation of fuses in current flow diagram "SB" 610_073

Fuseholder and relay carrier under the dash panel, left Designation of fuses in current flow diagram "SC"

Fuses In addition to the standard flat fuses, the space-saving mini fuses and the circuit breakers (thermal fuses), a new type of fuse is used in the Audi A3 ’13: the so-called J-Case fuse. The fuses are colour coded for easy identification:

J-Case fuses

Fuse rating

Colour

20 A

blue

25 A

white

30 A

pink

40 A

green

50 A

red

60 A

yellow

A new gripping tool is available for removing and fitting this new type of fuse. It is housed in the e-box cover in the engine bay.

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Gripping tool for J-Case fuses

610_071 5

Networking Installation locations of control units Some of the control units shown in the overview are optional and/ or country-specific equipment.

Refer to the current service literature for details of controls unit positions, as well as instructions for installation and removal.

J387 J364

J668 J104

J250

J794

J500

R242 E380

J685

J428

J844 J234

J587 J255

J518 J745

J533

J527 J285

J743

J525 J764

J623

J791 J667

J519

J386

Key: E380 J104 J234 J250 J255 J285 J345 J364 J386

6

Multimedia system operating unit ABS control unit Airbag control unit ECD control unit (electronically controlled damping) Climatronic control unit Control unit in dash panel insert Trailer detector control unit Additional heater control unit Door control unit, driver side

J387 J428 J492 J500 J518 J519 J525 J527 J533

Door control unit, front passenger side ACC control unit All-wheel drive control unit Power steering control unit Entry and start authorisation control unit Onboard power supply control unit Digital sound package control unit Steering column electronics control unit Data bus diagnostic interface

R78 J772

J769

J345

J770

J492

J843 J608

610_007

J587 J608 J623 J667 J668 J685 J743 J745 J764

Selector lever sensors control unit Special vehicle control unit Engine control unit Headlight power module, left Headlight power module, right MMI display Twin clutch gearbox mechatronics Cornering light and headlight range control unit Electrical steering column lock control unit

J769 J770 J772 J791 J794 J843 J844 R78 R242

Audi lane assist control unit Audi lane assist control unit 2 Reversing camera system control unit Audi parking system control unit Information electronics control unit 1 Vehicle tracking system interface control unit Headlight assist control unit TV tuner Front camera for driver assistance systems

7

Topology Light switch E1

Headlight power module, left J667

Sliding sunroof control unit J245

Wiper motor control unit J400

Headlight power module, right J668

Anti-theft alarm sensor G578

Rain and light detector sensor G397

Alarm horn H12

Humidity sensor G355

Power output module for left LED headlight

Onboard power supply control unit J519

Power output module for right LED headlight

Control unit in instrument cluster J285

Audi side assist control unit 2 J770

Steering column electronics control unit J527

Diagnostic port Multifunction steering wheel control unit J453

Door control unit, rear driver side1) J926

Door control unit driver side J386

Door control unit, rear passenger side1) J927

Door control unit passenger side J387

Data bus diagnostic interface J533

Trailer detector control unit J345

NOx sender control unit J583 Engine control unit J623

Entry and start authorisation control unit J518

NOx sender control unit 2 J881

Electrical steering column lock control unit J764

Seat occupancy recognition control unit J706

Vehicle tracking system interface control unit J843

Front left seat belt tensioner control unit J854

Special vehicle control unit J608

Front right seat belt tensioner control unit J855

Airbag control unit J234

Climatronic control unit2) J255

Twin clutch gearbox mechatronics J743

Selector lever sensors control unit J587

Fresh air blower control unit J126

8

Refrigerant circuit pressure sender G805

Air humidity sender in fresh air intake duct G657

Air quality sensor G238

The topology shows all control units with connectivity to the data bus system. Some of the control units shown here are optional or country-specific equipment, or will be introduced at a later date.

Adaptive light and headlight range control unit J745

This diagrammatic representation of all possible control units is purely theoretical. The adaptive light and headlight range control unit J745, for example, is never fitted at the same time as the headlight range control unit J431, rather only one or the other.

Headlight range control unit J431

Multimedia system operating unit E380

MMI display J685 Audi side assist control unit J769 Headlight assist control unit J844 Front camera for driver assistance systems R242

Digital sound package control unit J525

ACC control unit J428

Information electronics control unit 1 J794

ABS control unit J104

Battery monitor control unit J367

Power steering control unit J500

Alternator C

TV tuner R78

All-wheel drive control unit J492

Reversing camera system control unit J772

Audi parking system control unit J791

Auxiliary heater control unit J364

Auxiliary heating radio controlled receiver R64

ECD control unit (electronically controlled damping) J250

610_001

Key:

1) 2)

Powertrain CAN bus

Infotainment CAN bus

LIN bus

Convenience CAN bus

Diagnostics CAN bus

Sub-bus systems

Extended CAN bus

Suspension CAN bus

MOST bus

For five-door models only For more details of heater / air conditioning configurations, refer to SSP 609 "Audi A3 ’13". 9

Overview of bus systems Bus system

Cable colour

Configuration

Max. data transfer rate

Characteristic

Powertrain CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

Convenience CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

Extended CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

Infotainment CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

Suspension CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

Diagnostics CAN bus

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

MOST bus

Optical bus system

150 Mbit/s

Ring structure: an open circuit leads to total system failure

LIN bus

Electrical single-wire bus system

20 kbit/s

Single-wire capable

Sub-bus system (private bus)

Electrical two-wire bus system

500 kbit/s

Not single-wire capable

New features of the bus system • The convenience CAN bus and infotainment CAN bus are highspeed bus systems in the Audi A3 ’13 • New MOST bus – MOST150 • The control unit in the instrument cluster J285 is a convenience CAN user • The data bus diagnostic interface J533 is the master of LIN slave "multifunction steering wheel control unit J453" • The data bus diagnostic interface is not a MOST bus user • The information electronics control unit 1 J794 is the system and diagnostic manager for the MOST bus • The information electronics control unit 1 J794 is connected to the operating unit and MMI display via the sub-bus system

10

The networking diagram on pages 8/9 provides a schematic overview of the communication paths of in-vehicle control units. The equipment level dictates which control units are installed in the vehicle. Here are just a few examples: • The headlight range control unit J431 is never fitted at the same time as the cornering light and headlight range control unit J745. • The Headlight Assist control unit J844 is never fitted at the same time as the front camera for driver assistance systems R242 • The seat occupancy recognition control unit J706 is only available in the North American market • The TV tuner is only available in certain markets

Optical data bus system MOST150 History For the first time in an Audi vehicle, an optical data bus system known as the MOST bus (MOST25 to be precise) is fitted in the Audi  A8 ’03. This data bus system is named after the "Media Oriented Systems Transport (MOST) Cooperation". This group is made up of various automobile manufacturers, their components suppliers and software companies, who joined forces to create a standardised high-speed data transfer system.

The term "Media Oriented Systems Transport" denotes a network with media-oriented data transport. This means that, unlike in the CAN data bus, address-oriented messages are sent to a specific recipient. This technology is used in Audi vehicles to transfer data within the infotainment system. The data transfer rate on the MOST25 bus is approx. 25 Mbit/s.

MOST150 The MOST150 is used in the Audi A3 ’13 for the first time in an Audi vehicle. This developmental stage in MOST technology is six times faster than the MOST25 bus. The development process necessitated various modifications to MOST components.

For instance, the transmitter and receiver units – Fiber Optical Transmitters (FOT) – had to be adapted. Other components, such as the optical connectors, the fibre optics and the electrical connections of the control units, are identical to those of the MOST25.

Digital sound package control unit J525

System manager Up to three control units are integrated in the MOST bus in the Audi A3 ’13: • Information electronics control unit 1 J794 • Digital sound package control unit J525 • TV tuner R78 In the Audi A3 ’13 the information electronics control unit 1 J794 acts not only as the system manager for the MOST bus but also as the diagnostic manager - a function previously performed by the data bus diagnostic interface J533.

Information electronics control unit 1 J794

TV tuner R78

610_069

Optical replacement control unit VAS 6778 Diagnostics The ring break diagnosis procedure is identical to that of the previous MOST bus system. However, the inspection plan for the Audi A3 ’13 must be retrieved in the vehicle diagnostic tester using address word 5F. Even though the ring break diagnosis procedure remains unchanged, a modified tool – the optical replacement control unit VAS 6778 – must be used in the event of an optical fault in the MOST150 bus, due to the modified transmitter and receiver units in the control units.

610_074 11

Control units Brief descriptions Onboard power supply control unit Designation

Onboard power supply control unit J519

Equipment

Always fitted

Installation position

Under the left-hand dash panel

Tasks

• • • • • •

Diagnostic address

09

Data bus communication

• Convenience CAN bus user • J519 is the LIN master for: • LIN 1 – light switch E1; wiper motor control unit J400; combined sensor – rain and light detection sensor G397 and humidity sender G355 • LIN 2 – alarm horn H12 • LIN 3 – sliding sunroof control unit J245; antitheft alarm sensor G578

Special feature

LIN 1 is distributed to two pins on J519. Wiper motor J400 is connected to pin B30. Rotary light switch E1 and the combined sensor – rain and light detection sensor G397 and humidity sender G355 – are connected to pin C28. This means that the control units connected to pin C28 are also affected in the event of a short circuit to positive or negative at pin B30.

Central locking master Exterior light master Interior light master Antitheft alarm / optional equipment master, PR No.: 7AL Activation of various relays Activation of various convenience components: • Seat heaters • Heated spray nozzles • Windscreen washer pump • Headlight washer system pump • Reading in various switches and buttons • Reading in various sensors

J519

610_009

Reference For a detailed description of the onboard power supply control unit J519, refer to SSP 611 "Audi A3 ’13 – Electronics and Driver Assistance Systems".

12

Gateway Designation

Data bus diagnostic interface J533

Equipment

Always fitted

Installation position

Under the left-hand dash panel

Tasks

• • • •

Diagnostic address

19

Data bus communication

• All CAN bus system users • LIN master of battery monitor control unit J367 and alternator • LIN master of multifunction steering wheel control unit J453 / optional equipment

Special feature

Not a MOST bus user

Networking gateway Diagnostic master Energy management system control Master for multifunction steering wheel / optional equipment

J533

610_010

Instrument cluster with driver information system (DIS) Designation

Control unit in dash panel insert J285

Equipment

Always fitted Versions: • Monochrome DIS without onboard computer, PR No.: 9S4 • Monochrome DIS with onboard computer, PR No.: 9S5 • Colour DIS with onboard computer, PR No.: 9S6

Installation position

In the dash panel

Tasks

• Display of information relevant to the driver • Immobiliser master

Diagnostic address

17

Data bus communication

Convenience CAN bus user

Special feature

For the first time in an Audi model, this system is a convenience CAN user

J285

610_011

13

Steering column electronics Designation

Steering column electronics control unit J527

Equipment

Always fitted

Installation position

On the steering column

Tasks

• Connects the steering column stock and the electrical components in the steering wheel to the vehicle electronics • Terminal management master for vehicles without advanced key

Diagnostic address

16

Data bus communication

Convenience CAN bus user

Special feature

Transfers the LIN signals from the gateway to the multifunction steering wheel control unit J453 in models equipped with a multifunction steering wheel

J527

610_012

Trailer detector Designation

Trailer detector control unit J345

Equipment

Optional equipment, PR No.: 1D2

Installation position

Behind the side trim on the left-hand side of the luggage compartment

Task

Interconnects the vehicle electrics and the trailer electrics

Diagnostic address

69

Data bus communication

Convenience CAN bus user

J345

610_013

14

Heating / air conditioning Designation

Heater control unit J65 Air conditioning system control unit J301 Climatronic control unit J255

Equipment

• Heating, PR No.: 9AC • Air conditioning system, PR No.: KH6 • Automatic air conditioning, PR No.: 9AK

Installation position

In the dash panel, centre

Tasks

Controlling: • Temperature • Blower • Air distribution

Diagnostic address

08

Data bus communication

• • • •

Special feature

All LIN slaves are connected to a LIN output.

Convenience CAN bus user J65 is the LIN master of the fresh air blower J126 J301 is also the LIN master of the refrigerant circuit pressure sender G805 J255 is also the LIN master of the air quality sensor G238 and the air humidity sensor in fresh air duct G657

J65

610_014

J301

610_015

J255

610_016

15

Door electronics, driver side Designation

Door control unit, driver side J386

Equipment

Always fitted

Installation position

In the driver's door

Task

Controlling the electrical and electronic components in and on the driver's door

Diagnostic address

42

Data bus communication

• Convenience CAN bus user • In 5-door models it is connected to the door control unit, rear driver side J926 via a LIN line

Special features

• J386 acts as the substitute master for the central locking system in the event of failure of the onboard power supply control unit J519 • Activates the side marker lights in the driver's door mirror

J386

610_017

Front passenger side door electronics Designation

Door control unit, front passenger side J387

Equipment

Always fitted

Installation position

In the front passenger's door

Task

Controlling the electrical and electronic components in and on the front passenger's door

Diagnostic address

52

Data bus communication

• Convenience CAN bus user • In 5-door models it is connected to the door control unit, rear passenger side J927 via a LIN line

Special feature

Activates the side marker lights in the front passenger door mirror

J387

610_018

16

Advanced key / keyless entry and start authorisation Designation

Entry and start authorisation control unit J518

Equipment

Optional equipment, PR No.: 4F2

Installation position

Under the dash panel

Tasks

• Reading in both capacitive sensors • Activation of the entry and start authorisation aerials

Diagnostic address

B7

Data bus communication

Convenience CAN bus user

Special feature

For the first time in an Audi model, the external aerials connected to J518 are not installed in the doors, rather on the vehicle underbody in the B-post area.

J518

610_019

Vehicle tracking Designation

Vehicle tracking system interface control unit J843

Equipment

Optional equipment, PR No.: 7G9

Installation position

Behind the side trim on the left-hand side of the luggage compartment

Tasks

• Requirement for installation of Audi Tracking Assistant Plus • Data exchange between the tracking assistant and other vehicle control units

Diagnostic address

• 3D • 30, if an additional special vehicle control unit is fitted

Data bus communication

Convenience CAN bus user

Special feature

The tracking assistant is always fitted as a retrofit solution (even in new vehicles). The vehicle tracking system interface control unit J843 cannot be retrofitted.

J843

610_021

17

Electrical steering column lock Designation

Electrical steering column lock control unit J764

Equipment

Optional advanced key, PR No.: 4F2

Installation position

On the steering column

Tasks

• Locking and unlocking the steering column • Terminal management master

Diagnostic address

2B

Data bus communication

Convenience CAN bus user

Special features

• Can be replaced separately from the steering column • Immobiliser user • Reads in the entry and start authorisation button

J764

610_020

Special functions Designation

Special vehicle control unit J608

Equipment

Optional equipment, PR No.: F5B

Installation position

Behind the side trim on the left-hand side of the luggage compartment

Task

To allow special functions, such as taxi, driving school etc., to be implemented.

Diagnostic address

3D

Data bus communication

Convenience CAN bus user

Special feature

The hardware control unit is identical to the vehicle tracking system interface control unit J843

J608

610_022

18

Reversing camera Designation

Reversing camera system control unit J772

Equipment

Optional equipment Versions: • Parking aid plus with reversing camera, PR No.: 7X2+KA2 • Parking aid with reversing camera, PR No.: 7X5+KA2

Installation position

Behind the side trim on the right-hand side of the luggage compartment

Tasks

• Rectifying and processing the raw images captured by the reversing camera • Transferring the processed images to the information electronics control unit 1 J749

Diagnostic address

6C

Data bus communication

Convenience CAN bus user

Special features

• Video connections are mechanically encoded • Only two of the three connections are used

J772

Reversing camera connection

Unused

Electrical Video output connection

610_025

Audi adaptive cruise control (automatic speed and distance control) Audi pre sense front Designation

ACC control unit J428

Equipment

Optional equipment for vehicles with: • S tronic, PR No.: 8T3 • Manual gearbox, PR No.: 8T5 • pre sense front, PR No.: 7W2

Installation position

Behind the radiator grille below the number plate mount in the centre

Tasks

• Radar scanning of traffic • Controlling speed and distance

Diagnostic address

13

Data bus communication

CAN-Extended bus user

Special feature

Independent braking to a standstill behind a vehicle driving ahead and independent restarting (ACC Stop & Go)

J428

610_043

19

Auxiliary heater Designation

Auxiliary heater control unit J364

Equipment

Optional equipment, PR No.: 9M9

Installation position

On the outer right side member

Tasks

• Defrosting the windows • Comfort mode for heated interior

Diagnostic address

18

Data bus communication

• Convenience CAN bus user • J364 is the LIN master of the auxiliary heating radio controlled receiver R64

Special features

• The target time and not the starting time of the auxiliary heater is selected with the remote control • Cannot be replaced separately from the heating unit

J364

610_024

Infotainment Designation

Information electronics control unit 1 J794

Equipment

Standard Audi Radio, PR No.: I8A Optional equipment Versions: • MMI Radio, PR No.: I8B • MMI Navigation plus, PR No.: I8F, 7UG

Installation position

In the glove compartment

Task

Controlling the infotainment systems

Diagnostic address

5F

Data bus communication

• Infotainment CAN bus user • In MMI versions it is connected to the MMI display J685 and the multimedia system operating unit E380 via a private CAN bus

Special features

• In the case of MMI versions, an electrically retractable screen is integrated in the dash panel • If the Bang & Olufsen Sound System and/or TV tuner is fitted, the information electronics control unit 1 J794 is the system manager as well as the ring break diagnostics master for the MOST bus

J794

610_026

20

Sound amplifier Designation

Digital sound package control unit J525

Equipment

Optional equipment for models with Bang & Olufsen Sound System, PR No.: 9VS

Installation position

Under the seat at the front left

Task

Activation of the 14 loudspeakers

Diagnostic address

47

Data bus communication

MOST bus users

J525

610_027

TV tuner Designation

TV tuner R78

Equipment

Optional equipment, PR No.: QV6

Installation position

In the luggage compartment, rear right

Task

TV reception, display in the MMI display J685

Diagnostic address

57

Data bus communication

MOST bus users

Special feature

Availability is country-specific

R78

610_028

21

Electronic Stabilisation Program ESP Designation

ABS control unit J104

Equipment

Always fitted

Installation position

• In the engine bay on the right-hand side of the engine bulkhead in left-hand-drive models • In the engine bay on the left-hand side of the engine bulkhead in right-hand-drive models

Tasks

• • • • • • •

Diagnostic address

03

Data bus communication

Suspension CAN bus user

Special features

• The control unit can be replaced separately from the valve block using ESD protective mat VAS 6613 • The electro-mechanical parking brake is integrated in the ABS control unit. Address word 53 for electromechanical parking brake has been deleted.

Anti lock braking system ABS Electronic Stabilisation Program ESP Traction Control System TCS Electronic Differential Lock EDL Electronic transverse lock Multicollision brake Electro-mechanical parking brake EPB

J104 Valve block

610_029

Power steering Designation

Power steering control unit J500

Equipment

Always fitted

Installation position

Connected to the steering gear

Tasks

• • • •

Diagnostic address

44

Data bus communication

Suspension CAN bus user

Special features

• Control unit with power steering motor and steering angle sender G85 can only be replaced together with the steering gear • G85 has no separate data bus connections; data is transferred via the power steering control unit J500

Power steering Servotronic – speed-dependent power steering Corrective steering intervention in combination with Audi active lane assist and park assist Corrective steering intervention in combination with ESP

J500 610_030

Reference For detailed descriptions of the suspension components refer to SSP 612 "Audi A3 ’13 – Suspension".

22

All-wheel drive Designation

All-wheel drive control unit J492

Equipment

Standard equipment with quattro powertrain

Installation position

Connected to the rear axle gear

Task

Control of the Haldex coupling according to the driving situation

Diagnostic address

22

Data bus communication

Suspension CAN bus user

Special feature

The control can be replaced separately and without removing the rear axle gear

J492

610_031

Parking aid / park assist Designation

Park assist steering control unit J791

Equipment

Optional equipment Versions: • Rear parking aid, PR No.: 7X1 • Parking aid plus, PR No.: 7X2 • Audi parking system, PR No.: 7X5

Installation position

Behind the left-hand dash panel

Tasks

• Reading in the ultrasound sensors and, depending on version, audible or visual obstacle warnings • If the Audi parking system is fitted, it also measures the parking spot and calculates the parking manoeuvre

Diagnostic address

76

Data bus communication

Suspension CAN bus user

Special feature

The diagnostic address is now 76, having been 10 on previous Audi models

J791

610_032

23

Audi magnetic ride Designation

ECD control unit (electronically controlled damping) J250

Equipment

Optional equipment, PR No.: 2H7

Installation position

Under the right-hand front seat

Task

Adaptation of the damping characteristic

Diagnostic address

14

Data bus communication

Suspension CAN bus user

J250

610_033

Engine control unit Designation

Engine control unit J623

Equipment

Always fitted

Installation position

In the engine bay between the battery and e-box

Task

Controlling the engine characteristic

Diagnostic address

01

Data bus communication

• Powertrain CAN bus user • To comply with specific emission standards, the engine control unit J623 is connected to both NOx sender control units via a private CAN bus

Special features

• Control units (petrol engine/diesel engine) have different plug connections • Immobiliser user • Vehicles with an antitheft alarm have an antitheft device (sheet metal cover with shear bolts) over the engine control unit

J623

Shear bolt 1 Antitheft protection Shear bolt 2

610_034

24

Airbag / Audi pre sense basic Designation

Airbag control unit J234

Equipment

• Always fitted • Optional Audi pre sense basic, PR No.: 7W1

Installation position

On the centre tunnel in front of the centre console

Tasks

• Deployment of the airbags • Audi pre sense basic • Deployment of the pedestrian protection system

Diagnostic address

15

Data bus communication

• Powertrain CAN bus user • If Audi pre sense basic is fitted, it is the LIN master for the front left and right belt tensioner control units (J854 and J855 respectively) • In vehicles specified for the North American market, it is the LIN master for the seat occupancy recognition control unit J706

Special feature

It also controls the pedestrian protection system

J234

610_035

S tronic Designation

Mechatronic unit for dual-clutch gearbox J743

Equipment

Optional equipment for vehicles with S tronic

Installation position

On the gearbox

Task

Controling the dual clutch gearbox

Diagnostic address

02

Data bus communication

Powertrain CAN bus user

Special feature

Dual clutch gearbox 0CW (7-speed, see fig.) or dual clutch gearbox 09D (6-speed) is used depending on engine version.

J743

610_036

25

Selector lever sensors Designation

Selector lever sensors control unit J587

Equipment

Optional equipment for vehicles with S tronic

Installation position

On the selector lever

Tasks

• Signalling the selector lever position • Signalling the tiptronic commands

Diagnostic address

81

Data bus communication

Powertrain CAN bus user

Special feature

The control unit can only be replaced together with the selector lever

J587

610_037

Headlight range control on vehicles with bi-xenon headlights Designation

Headlight range control unit J431

Equipment

Optional equipment for models with bi-xenon headlights, PR No.: 8IG

Installation position

Behind the left-hand dash panel

Task

Dynamic headlight range control

Diagnostic address

55

Data bus communication

CAN-Extended bus user

J431

610_039

26

Headlight range control on vehicles with bi-xenon headlights and adaptive light or LED headlights Designation

Adaptive light and headlight range control unit J745

Equipment

Optional equipment for vehicles with: • Bi-xenon headlights with adaptive light, PR No.: 8IM • LED headlights, PR No.: 8EY

Installation position

Behind the left-hand dash panel

Tasks

• Dynamic headlight range control • Controlling the light profiles • Controlling the adaptive light

Diagnostic address

55

Data bus communication

CAN-Extended bus user

Special feature

It is connected to the power modules for the left and right headlights via a private CAN bus

J745

610_038

Audi side assist (lane change warning system) Designation

Audi lane assist control unit J769 Audi lane assist control unit 2 J770

Equipment

Optional equipment, PR No.: 7Y1

Installation position

• In the rear right bumper J769 • In the rear left bumper J770

Task

• To scan the peripheral area behind and to the side of the vehicle • To activate the warning lights in the door mirrors

Diagnostic address

3C

Data bus communication

• J769 (master) CAN-Extended bus user • J770 (slave) connected to J769 via private CAN bus

Special feature

The control units are mounted in the bumper cover. The system must be calibrated after removal and installation.

J770

J769

610_040

27

Headlight assist Designation

Headlight assist control unit J844

Equipment

Optional equipment, PR No.: 8G1

Installation position

In the rear-view mirror

Task

Automatic activation and deactivation of the main beam taking oncoming traffic into consideration

Diagnostic address

20

Data bus communication

CAN-Extended bus user

Special feature

Available with halogen headlights, bi-xenon headlights and LED headlights

J844

610_041

Audi active lane assist (lane departure warning system) Headlight assist Traffic sign recognition Intelligent light system Designation

Front camera for driver assistance systems R242

Equipment

Optional equipment • Audi active lane assist, PR No.: 7Y4 • Camera-based traffic sign recognition, PR No.: QR9 • Intelligent light system, PR No.: 8G2

Installation position

On the windscreen, above the base of the interior rear-view mirror

Task

Scanning and imaging of traffic, traffic signs and lane markers

Diagnostic address

A5

Data bus communication

CAN-Extended bus user

Special feature

Camera-based traffic sign recognition requires MMI Navigation plus and colour driver information display

R242

610_042

28

Exterior lighting Light switch

Headlight range control adjuster E102

The light switch of the Audi A3 ’13 is a LIN slave of the onboard power supply control unit J519. The operating concept with the rotary switch and the control panel for the fog lights and/or rear fog light has been adapted to the Audi model range. The headlight range adjuster is fitted in models with halogen headlights only.

Designation

Light switch E1

Equipment

Always fitted

Installation position

Dash panel, driver side

Task

To indicate the driver's preferred light setting to the onboard power supply control unit

Diagnostic address

Control panel

Rotary switch

Display and instrument lighting controller

None, LIN slave, measurement values and diagnostics via onboard power supply control unit J519 (master)

610_045

Function Rotary switch: 0

Lights off (in some countries the daytime running light is switched on automatically at "terminal 15 on")

AUTO

The automatic daytime running light is switched on and off depending on the light sensor (this position is also prerequisite for the "headlight assist" and "intelligent light system" functions)

Upper control panel: Fog light All-weather light in vehicles with LED headlights

Lower control panel:

Parking light

Rear fog light

Dipped beam

Electrical connections and circuit The four positions of the rotary switch, button operations and the position of the instrument lighting controller are read in by the onboard power supply control unit J519 via the LIN line. In addition, all commands for the switch lighting and the warning lamps of the individual functions are sent to the light switch by the onboard power supply control unit. The redundancy line is used to determine the plausibility of the switch positions. In the event of a short circuit or an open circuit in the LIN line or redundancy line, the emergency light function is activated by the onboard power supply control unit ("dipped beam on") and a diagnostic trouble code is entered in the fault memory of the onboard power supply control unit. The headlight range adjuster E102 is integrated in the light switch housing but is a separate component. Its information is transmitted to the headlight range control servomotors via a discrete line.

Light switch E1

Headlight range control adjuster E102

610_046

Connections of E1:

Connections of E102:

Pin 1

LIN

Pin 1

Terminal 30

Pin 2

Terminal 30

Pin 2

Terminal 31

Pin 3

Terminal 31

Pin 4

Redundancy line

Pin 4

Activation of the headlight range control servomotors

29

Headlights In the case of the Audi A3 ’13, a distinction is made between headlight versions: • • • •

Halogen headlight / ECE1) and SAE2) Bi-xenon headlight / ECE1) and SAE2) Bi-xenon headlights with adaptive light, ECE1) only LED headlight / ECE1) and SAE2)

To remove headlights, the bumper cover must first be taken off. In addition to the headlight end caps, the parts shown in the diagrams can be replaced. In the event of damage to the upper and inner headlight attachments, repair tabs can be attached to the headlight housing.

Halogen headlight PR no.: 8ID

Left parking light bulb M1

Left main beam bulb M30 Daytime driving light bulb, left L174

Left headlight range control servomotor V48

Turn signal bulb, front left M5

Sidemarker2)

Left dipped beam bulb M29

610_047

Light functions

Illuminants used

Power

Daytime running light

Bulb H15

15 watts

Parking light

Bulb W5W

5 watts

Dipped beam

Bulb H7LL

55 watts

Main beam

Bulb H15

55 watts

Bulb PSY24W

24 watts

LED

0.6 watts

Turn signal Sidemarker

2)

Activation mechanism

Adaptation for driving on opposite side of road

In the case of halogen headlights, the various light functions are activated by the onboard power supply control unit J519. The daytime running lights are dimmed for the duration of the turn signalling cycle (in the SAE2) version they are switched off ). The halogen headlights can be combiend with a headlight assist system.

It is not necessary to adapt the headlights. No further action is needed to meet the statutory requirements.

1) 2)

ECE = for the European market SAE = for the North American market

30

Bi-xenon headlight PR no.: 8IG In the case of the bi-xenon headlight, the component parts shown here can be replaced.

Exception: The LED module with its 2 LEDs for daytime running lights and parking light. In the event of a fault in this module, the headlight must be replaced.

Left gas discharge lamp L13 Left headlight range control servomotor V48

Turn signal bulb, front left M5 Sidemarker2)

Left LED module for daytime running lights and parking light L176

Left gas discharge lamp control unit J343 Left daytime running light and parking light control unit 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 %

Dipped beam

Gas discharge lamp D3S

35 watts

Bulb PSY24W

24 watts

LED

0.6 watts

Main beam (change-over by shutter) Turn signal Sidemarker

2)

Activation mechanism

Adaptation for driving on opposite side of road

In the case of bi-xenon headlights, the various light functions are activated by the onboard power supply control unit J519. The daytime running lights are dimmed for the duration of the turn signalling cycle (in the SAE2) version they are switched off ). The left and right dipped beam shutter motors (V294 and V295 respectively) are used for changing over between low beam and high beam. The bi-xenon headlight can be combined with a main beam assist system (PR No.: 8G1).

It is not necessary to adapt the headlights. No further action is needed to meet the statutory requirements.

31

Bi-xenon headlight with adaptive light PR no.: 8IM Implementation of different light functions In the case of the bi-xenon headlight with adaptive light, a rotating roller is fitted between the gas discharge lamp and the lens. The roller has different profiles around its circumference. The various light functions are obtained by rotating the roller using the variable front lighting servomotors. In addition, the complete projection module - comprising the reflector, lens, gas discharge lamp and roller - can be swivelled sideways by the dynamic adaptive light servomotors (not shown) to produce the adaptive light. The bi-xenon headlight with adaptive light is not available for the North American market.

In the case of the bi-xenon headlight, the component parts shown here can be replaced. The following inner components of the headlight cannot be replaced separately: • • • • •

LED module for daytime running lights and parking light Sender for variable front lighting servomotors Swivel module position sensors Variable front lighting servomotors Dynamic adaptive light servomotors

Left gas discharge lamp L13

Left adaptive light bulb L148

Left headlight range control servomotor V48 (concealed in diagram)

Turn signal bulb, front left M5 Roller for light functions

Left variable front lighting servomotor V446 Left LED module for daytime running lights and parking light L176 Left gas discharge lamp control unit J343

Headlight power module, left J667

Left daytime running light and parking light control unit J860

610_049

Light functions

Illuminants used

Power

Daytime running light

2 LEDs with plastic optical fibres

18 watts

Parking light

dimmed to approx. 25 %

Dipped beam (profile on roller)

Gas discharge lamp D3S

35 watts

Bulb H8

35 watts

Bulb PSY24W

24 watts

Main beam (change of profile on roller) Motorway light (change of profile on roller) Town light (change of profile on roller and slight swivelling of projection modules) Tourist light (change of profile on roller) Adaptive light (swivelling of the projection module) Cornering light (activated on one side) Intersection light3) (activated on both sides) Turn signal 32

Bi-xenon headlights with adaptive light and "intelligent light system" PR no.: 8G2 The optional "intelligent light system" can be ordered in addition to the bi-xenon headlights with adaptive light. The intelligent light system function also requires the front camera for driver assistance systems R242 in order to monitor the current traffic situation. Oncoming vehicles, vehicles driving ahead and built-up areas are detected by the camera. Depending on the current traffic situation, the intelligent light system continuously adjusts the headlight range between dipped and main beam.

610_050

Front camera for driver assistance systems R242

Light functions

Illuminants used

Power

Daytime running light

2 LEDs with plastic optical fibres

18 watts

Parking light

dimmed to approx. 25 %

Country road light (profile on roller)

Gas discharge lamp D3S

35 watts

Bulb H8

35 watts

Bulb PSY24W

24 watts

Main beam (change of profile on roller) Motorway light (change of profile on roller) Town light (change of profile on roller and slight swivelling of projection modules) Tourist light (change of profile on roller) Adaptive light (swivelling of the projection module) Cornering light (activated on one side) Intersection light3) (activated on both sides) Turn signal

Adaptation for driving on opposite side of road Both in the case of the bi-xenon headlight with adaptive light and the bi-xenon headlight with adaptive light and intelligent light system, the headlight can be changed over for driving on the opposite side of the road by rotating the roller through 180°. These headlights can be completely changed over, i.e. the roller has all the required light profiles for both left and right hand drive. This means that only one hardware version of this headlight is needed.

The tourist light is activated in the MMI. In the CAR menu, the setting "Lights for driving on left" or "Lights for driving on right" can be selected under the menu option "Exterior lighting". In models fitted with a navigation system, the headlights are changed over automatically when crossing international borders, if necessary.

ECE = for the European market SAE = for the North American market 3) models with navigation only 1) 2)

33

LED headlights PR no.: 8EY In the case of the LED headlights, all light functions are performed by LEDs. No fog lights are fitted in models equipped with LED headlights.

Left headlight range servomotor

Parking light / daytime running light / turn signal

The all-weather light function is available as a substitute. However, this function is confined to the ECE1) version due to statutory requirements and is not available in the SAE2) version.

Cornering light

Left headlight fan

Dipped beam Sidemarker2) Main beam

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

Headlight range control power module LED power module (Dipped beam, main 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 approx. 15 %

Dipped beam

9 LEDs (2x 5 LED chip, 2x 2 LED chip)

41 watts

Main beam

8 LEDs (2x 4 LED chips)

36 watts

Cornering light

4 LEDs (2x 2 LED chips)

18 watts

Intersection light3)

LEDs of both cornering lights

36 watts

Turn signal

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

16 watts

LED

0.6 watts

All-weather light Motorway light

Sidemarker

2)

When the all-weather light function is active, several LEDs are switched off (shortening the headlight range and reducing the self-dazzle effect) and the cornering lights are switched on. The motorway light is produced by raising the light beam level using the headlight range control function. In the case of the intersection light, both cornerning lights are switched on (models with navigation only). None of these three light functions is legal for the North American market.

1) 2)

ECE = for the European market SAE = for the North American market

34

Adaptation for driving on opposite side of road It is not necessary to adapt the headlights. No further action is needed in order to meet the statutory requirements.

3)

models with navigation only

Fog light PR no.: 8WB The Audi A3 ’13 can be fitted with fog lights. These are integrated in the bumper and equipped with a 35 watt H8 bulb. The fog lights are activated directly by the onboard power supply control unit J519.

To replace the bulb, first the air intake grille and then the fog light must be removed from the bumper.

Fog light bulb, left L22

610_052

Overview of light functions The descriptions of the individual headlights specify which light function is available for which headlight version.

Country road light The country road light is an asymmetric light. It is activated when a driving speed of 50 kph is exceeded. In models equipped with a navigation system, the country road light is active unless the system has detected a built-up area or motorway driving. With the country road light function, the adaptive light may additionally be active.

610_053

Motorway light The motorway light is an asymmetrical light which illuminates the oncoming lane slightly better than the country road light. The motorway light is activated if the vehicle exceeds 110 kph for an extended period, and immediately if a speed of 130 kph is exceeded. In models equipped with a navigation system, the motorway light is activated when the vehicle is travelling faster than 80 kph and the navigation system recognises motorway driving.

610_054

Main beam The main beam is a symmetrical light. It can be activated by operating the main beam stalk, the main beam assist function or the intelligent light system. 610_055

35

Adaptive light The adaptive light adapts to the curvature of the corner depending on vehicle speed and steering angle, thereby illuminating the corner better. This function is active in a speed range of 10 kph to 110 kph. 610_056

Town light The town light is a symmetrical close-range light. It is activated at speeds of between 5 kph and 50 kph in models equipped with a navigation system if the navigation system detects a built-up area. The adaptive light cannot swivel when the "town light" function is active.

610_057

Cornering light The cornering light is produced by activating the G8 bulbs on one side in the bi-xenon headlights with adaptive light. The following conditions must be met in order to activate the cornering light: • sharp steering angle and driving speed of less than 70 kph or • activated turn signal and driving speed of less than 40 kph It is activated in addition to the country road light and the town light.

610_058

Intersection light The light function "Intersection light" is also available for models equipped with a navigation system. The intersection light is produced by switching on both cornering lights. It helps the driver to detect hazards from the side at road intersections and is activated ahead of the intersection.

Intersection light

36

The intersection light is always lit in combination with other lights. It is activated in conjunction with the town light while driving in built-up areas (see diagram below) and in conjunction with the country road light while driving on country roads.

Cornering light

610_059

Headlight range control Manual headlight range control Models with halogen headlights are equipped with a manual headlight range control system. Here, the driver is responsible for correct adaptation of the headlight range to the vehicle's load condition.

The headlight range adjuster E102 is integrated in the light switch housing, above the instrument lighting adjuster. It is supplied by terminal 15 and terminal 31 and activates both headlight range control servomotors via a discrete line.

Convenience CAN bus

Schematic diagram of the activation mechanism for halogen headlights

Terminal 15

Halogen headlight (left-hand side of vehicle)

Left parking light bulb M1 Left daytime running light and parking light bulb L186 Left dipped beam bulb M29 Left main beam bulb M30 Turn signal bulb, front left M5

Discrete lines Onboard power supply control unit J519

Headlight range control adjuster E102

Headlight range control servomotor V48

Discrete line

Terminal 31

610_060

Dynamic headlight range control Audi A3 ’13 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.

Extended CAN bus

Convenience CAN bus

Schematic diagram of the activation mechanism for bi-xenon headlights

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

Discrete lines Onboard power supply control unit J519

Headlight range control unit J431

Left daytime running light and parking light control unit J860 Turn signal bulb, front left M5 Left gas discharge lamp control unit J343

Discrete lines Headlight range control servomotor V48

Discrete line Rear left vehicle level sender G76 610_061

37

Convenience CAN bus

Schematic diagram of the activation mechanism for bi-xenon headlights with adaptive light

Bi-xenon headlight with adaptive light (left-hand side of vehicle) Discrete lines Left daytime running light and parking light control unit J860 Turn signal bulb, front left M5 Left gas discharge lamp control unit J343

Onboard power supply control unit J519

Power output module for left headlight J667

Extended CAN bus

Adaptive light and headlight range control unit J745

Private CAN bus (sub-bus)

Discrete lines

Discrete lines

Rear left vehicle level sender G76

Headlight range control servomotor V48 Left dynamic adaptive light control servomotor V318 Left variable front lighting servomotor V446 Left adaptive light bulb L148 Front left vehicle level sender G78

610_062

Extended CAN bus

Convenience CAN bus

Schematic diagram of the activation mechanism for LED headlights

LED headlights (left-hand side of vehicle) Discrete lines Onboard power supply control unit J519

Adaptive light and headlight range control unit J745

Private CAN bus (sub-bus)

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

LED power module (Dipped beam, main beam and cornering light)

Discrete lines Discrete line

Rear left vehicle level sender G76

Left headlight fan

Headlight range control power module

Discrete lines Left headlight range control servomotor

610_063 1)

SAE = for the North American market

38

Headlight range control in vehicles with wheel damping electronics The Audi A3 ’13 can optionally be equipped with wheel damping electronics. These vehicles have four senders for monitoring the vehicle's ride height. They are read in via discrete lines in the electronically controlled damping control unit J250.

The electronically controlled damping control unit J250 is a suspension CAN user and transfers information on vehicle ride height via the data bus to the installed headlight range control unit (varies depending on headlight version).

Schematic diagram of the activation mechanism for vehicles with wheel damping electronics

Headlight range control unit J4311)

Data bus diagnostic interface J533

Discrete line

Adaptive light and headlight range control unit J7452)

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)

Adaptive light and headlight range control unit J7453)

Private CAN bus (sub-bus)

Power module for headlight range adjustment3)

Discrete line

Headlight range control servomotors3)

ECD control unit (electronically controlled damping) J250

Discrete lines

Front left vehicle level sender G78

Front right vehicle level sender G289

Rear left vehicle level sender G76

Rear right vehicle level sender G77

610_064

with bi-xenon headlights with bi-xenon headlights with adaptive light 3) with LED headlights 1) 2)

39

Tail lights In the Audi A3 ’13 the light functions of the rear lighting are distributed to the tail lights in the rear end and the tail lights in the rear hatch.

A distinction is made between the following versions of the tail lights: • Basic tail lights (in combination with halogen headlights) • LED tail lights (in combination with bi-xenon headlights, bi-xenon headlights with adaptive light and LED headlights) The onboard power supply control unit J519 activates the tail lights irrespective of version.

Basic tail light PR no.: 8SA

Brake/tail light 1

Turn signal

Tail light 2

Brake/tail light 3

610_065

Reversing light

Light functions

Illuminants used

Activation mechanism

Power

Brake light Tail light 1

Bulb W21W

100 % 21 %

21 watts approx. 5 watts

Tail light 2

Bulb W16W

31 %

approx. 5 watts

Rear fog light Tail light 3

Bulb H21W

100 % 10 %

21 watts approx. 2 watts

Turn signal

Bulb PY21W

100 %

21 watts

Reversing light

Bulb H6W

100 %

6 watts

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 open.

40

The rear hatch light bulbs can be accessed by a service flap. The side light must be removed in order to replace a bulb.

LED tail light PR no.: 8SK

Turn signal

Reversing light

Brake light

Rear fog 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

Rear fog light

Bulb H21W

100 %

21 watts

Turn signal

20 LEDs

100 %

approx. 3.5 watts

Reversing light

Bulb H6W

100 %

6 watts

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.

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.

41

High-level brake light The high-level brake light is integrated in the rear spoiler and, comprising a total of 48 LEDs, provides additional brake lighting.

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.

High level brake light bulb M25 610_067

Number plate lights The number plate lights on the Audi A3 ’13 use LED technology irrespective of tail light version. Both number plate lights are clipped into the rear hatch panel, and each has two LEDs. As with the high-level brake light, they are activated by the onboard power supply control unit J519.

610_068

42

Annex Self Study Programmes For further information about the technology of the Audi A3 ’13, refer to the following Self Study Programmes.

610_075

610_076

610_077

SSP 238 Data exchange on the CAN bus I, order number: 140.2810.57.20 SSP 269 Data exchange on the CAN bus II, order number: 140.2810.88.20 SSP 286 Audi New data bus systems – LIN, MOST, BluetoothTM, order number: 000.2811.06.20

610_078

610_079

610_080

SSP 609 Audi A3 ’13, order number: A12.5S00.93.20 SSP 611 Audi A3 ’13 Vehicle Electronics and Driver Assistance Systems, order number: A12.5S00.95.20 SSP 612 Audi A3 ’13 Suspension, order number: A12.5S00.96.20

43

610

Audi Vorsprung durch Technik

Self Study Programme 610 For internal use only

Audi A3 ’13 Onboard Power Supply and Networking

All rights reserved. Technical specifications are subject to change. Copyright AUDI AG I/VK-35 [email protected] AUDI AG D-85045 Ingolstadt Technical status 04/12 Printed in Germany A12.5S00.94.20

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