Audi A6 2005 - Electrics Handbuch

326

Subject to

technical change.

AUDI AG

I/VK 35

Service.t[email protected]

Fax +49 841/89 36367

AUDI AG

D 85045 Ingolstadt

Technical release 01/04

Printed in Germany

A04.5S00.09.20

Audi A6 ‘05 – Electrics

Self-Study Programme 326

Vorsprung durch Technik www.audi.co.uk Service Training

The new Audi A6 – the most progressive vehicle

takes the lead.

The new Audi A6 consistently adopts the highly

networked electronic architecture, which is already

used in the Audi A8. Overall, new technologies allow

the A6 to match up with its "model" vehicle, the Audi

A8. Features, which were previously reserved or

luxury vehicles, are now also available in the top-

class segment.

In combination with these diverse capabilities,

the underlying technology has, o course,

been enhanced considerably.

The use o the most modern network technologies,

such as CAN, LIN, MOST and Bluetooth, and the

related distributed vehicle unctions signals the

arrival o a new generation o vehicle electrics in

this class.

Some o these are sa ety-related eatures, such as

the combined rain/light sensor or the pivoting

cornering headlight. Com ort eatures o the top

class, such as the MMI operating system or

sophisticated unctionalities or the mobile

baseplate, which is available ex-works, are part and

parcel o these new saloons.

The new Audi A6 has everything that is needed to

become the Number One model in the top-class

range.

It combines many di erent, attractive components

to orm one unit. Design and per ormance go

hand-in-hand. The new Audi A6 will take over

as the most progressive vehicle.

The Audi A6 – the most progressive vehicle takes the lead

Number One: With Design & Per ormance

NoteRe erence NoteRe erence

Control unit installation positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Bus topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation positions of fuses and relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Overview

Convenience electrics

Control unit for power management J644 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ccess and start authorisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Immobiliser and component protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

External lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Control unit in dash panel insert J285 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Control unit for on-board power supply J519 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Control unit 2 for on-board power supply J520 . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Central control unit for convenience system J393 . . . . . . . . . . . . . . . . . . . . . . . . 55

Door control units J386 - J389 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Control units for seat adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Infotainment

Multimedia interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

ntenna systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Control unit for front information J523 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Sound systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

vailable telephone systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

The Sel -Study Programme provides in ormation on the undamentals o design and unction o new vehicle

models, new vehicle components or new technologies.

The Sel -Study Programme is not a Workshop Manual!

Speci ied values serve only to make the in ormation easier to understand and relate to the so tware version

that was valid at the time the Sel -Study Programme (SSP) was created.

For maintenance and repair work, please make sure to use the current technical documentation.

Contents

Overview

1 Auxiliary heating control unit J364

2 Control unit or ABS with EDL J104

3 Control unit or distance control J428

4 Transmitter unit in wheel well or tyre pressure

monitoring, ront le t G431

5 Control unit or on-board power supply J519

6 Door control unit, driver's side J386

7 Control unit or access and

start authorisation J518

8 Control unit in dash panel insert J285

9 Control unit or steering column electronics J527

10 Control unit or telephone, telematics J526

Telephone transmitter and receiver R36

11 Engine control unit J623

12 Climatronic control unit J255

13 Control unit or seat adjustment with steering-

column adjustment memory J136

14 Level control unit J197

Control unit or headlight range control J431

Control unit or tyre pressure monitoring J502

Control unit 2 or onboard power supply J520

Control unit or display and operating unit or

ront in ormation J523

Data bus diagnosis inter ace J533

Antenna read-in unit or keyless access

authorisation J723

15 CD changer R41

CD ROM drive R92

16 Door control unit, rear le t J388

17 Airbag control unit J234

Control unit installation positions

18 Rotation rate sensor 202

19 Door control unit, passenger's side J387

20 Control unit or seat adjustment with memory,

passenger’s side, J521

21 Door control unit, rear right J389

22 Transmitter unit in wheel well or tyre pressure

monitoring, rear le t G433

23 Radio receiver or auxiliary heating R64

24 Control unit or navigation with CD drive J401

Control unit or voice input J507

Digital sound package control unit J525

Radio R

TV tuner R78

Digital radio R147

25 Transmitter unit in wheel well or tyre pressure

monitoring, rear right G434

26 Parking aid control unit J446

Control unit or trailer detection J345

27 Central control unit or convenience system J393

28 Control unit or electric parking and

hand brake J540

29 Control unit or power management J644

326_146

Bus topology

Overview

NOX sensor

J583

Rotation rate sensor

G202

Seat occupied

recognition

J706

Power module

or le t headlight

J667

Power module or

right headlight

J668

Level control

J197

Electric parking

and hand brake

J540

Headlight range

control

J431

Automatic

transmission

J217

Airbag

J234

ABS with EDL

J104

Engine electronics 1

J623

Diagnosis connection

T16

Control unit in dash

panel insert

J285

Distance control

J428

Data bus diagnosis

or data bus

J533

Door control unit,

driver’s side

J386

Door control unit,

passenger’s side

J387

Door control unit,

rear le t

J388

Door control unit,

rear right

J389

Seat adjustment

with memory

Steering column

adjustment

J136

Seat adjustment

with memory,

passenger’s side

J521

Trailer detection

J345

Steering column

electronics

J527

Multi- unction

steering wheel

J453

Steering-angle

sensor

G85

Power management

J644

Auxiliary heating

J364

Parking aid

J446

On-board power

supply 2

J520

Access and

start authorisation

J518

On-board power

supply

J519

Centr. contr. unit or

convenience system

J393

Climatronic

J255

Tyre pressure

monitoring

J502

326_027

Display and

operating unit or

ront in ormation

J523

Tel e ph one

transmitter and

or telephone

R36

CD changer

R41

Digital

sound package

J525

Switch or

access and

start authorisation

E415

Antenna read-in

unit or keyless access

authorisation

J723

Wiper motor

J400

Sensor or rain and

light detection

G397

Passenger

compartment

monitoring

G273

Alarm horn

H12

Fresh air an

J126

Re rigerant pressure and

re rigerant temperature

G395

Tra nsmitt er,

ront le t

G431

Transmi t ter,

ront right

G432

Transmitter,

rear le t

G433

Transmitter,

rear right

G434

Antenna, rear

R96

Tel e p ho n e /

telematics

J526

Handset

or telephone

R37

Navigation

with CD drive

J401

TV tuner

R78

Radio module

Voice input

J507

MOST bus

CAN Instrument cluster

CAN Diagnosis

CAN Drive

CAN Convenience

CAN Distance control

LIN bus

Various sub-bus systems

Wireless transmission

– Bluetooth signal

Overview

Installation positions of fuses and relays

1 E box in radiator tank, le t

2 Relay and use holder behind

dash panel, le t

3 Fuse holder in dash panel, le t

4 Main use carrier in radiator tank, right

5 Fuse holder in dash panel, right

6 Relay and use holder in the boot, right

326_148

The basic design o the control unit or power

management is the same as the control unit used in

the Audi A8 ‘03.

It is installed in the boot well, next to the battery.

This control unit has been adapted or use in the

Audi A6 ’05 in that it now has revised so tware,

which shows the battery condition rather than the

battery charge level in the MMI display.

Furthermore, the diagnosis tester can be used to

read out history data, i.e. data relating to the

condition o the on-board power supply in the past.

Convenience electrics

Re erence

The basic unctions o the control unit or power

management J644 are described in the SSP 287.

Battery condition

The battery condition indicates how e icient the

battery is. The e iciency is determined rom the

battery charge level and the ability to start.

Advantages o the battery condition:

– The cut-o stages can be allocated directly to the

battery condition.

– The messages in the central display o dash

panel insert J285 always appear or the same

battery condition reading.

– A 100 % display indicates that no cut-o stage

will be set the next time the engine is switched

o .

326_072

User Car On-board manual

Battery condition

Systems Maintenance

Control unit for power management J644

326_094

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