Audi a 6 Training

7/31/2019 Audi a 6 Training

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Audi A6 05 Electrics

Self-Study Programme 326

Service Training


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The new Audi A6 the most progressive vehicletakes the lead.

The new Audi A6 consistently adopts the highlynetworked electronic architecture, which is already

used in the Audi A8. Overall, new technologies allowthe A6 to match up with its "model" vehicle, the AudiA8. Features, which were previously reserved forluxury vehicles, are now also available in the top-class segment.

In combination with these diverse capabilities,the underlying technology has, of course,been enhanced considerably.The use of the most modern network technologies,such as CAN, LIN, MOST and Bluetooth, and therelated distributed vehicle functions signals thearrival of a new generation of vehicle electrics in

this class.Some of these are safety-related features, such asthe combined rain/light sensor or the pivotingcornering headlight. Comfort features of the topclass, such as the MMI operating system orsophisticated functionalities for the mobilebaseplate, which is available ex-works, are part andparcel of these new saloons.

The new Audi A6 has everything that is needed to

The Audi A6 the most progressive vehicle takes the lead


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

Bus topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Overview

Convenience electrics

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

Access and start authorisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

External lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Control units for seat adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Infotainment

Multimedia interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Antenna systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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

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

Contents


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Overview

Control unit installation positions


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326_146


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Display andoperating unit forfront information

J523

Telephonetransmitter and

for telephoneR36

CD changerR41

Digitalsound packageJ525

Switch foraccess and

start authorisationE415

Antenna read-inunit for keyless access

authorisationJ723

Telephone/telematics

J526

Hanfor tele

R

Navigationwith CD drive

J401

TV tunerR78

Radio moduleR

Voice inputJ507

MOST bus

CAN Instr

CAN Diag

CAN Driv


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Overview

Installation positions of fuses and relays

1 E box in radiator tank left


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The basic design of the control unit for powermanagement is the same as the control unit used inthe Audi A8 03.It is installed in the boot well, next to the battery.

This control unit has been adapted for use in theAudi A6 05 in that it now has revised software,which shows the battery condition rather than thebattery charge level in the MMI display.

Furthermore, the diagnosis tester can be used toread out history data, i.e. data relating to thecondition of the on-board power supply in the past.


Reference

The basic functions of the control unit for powermanagement J644 are described in the SSP 287.

Battery condition

The battery condition indicates how efficient thebattery is. The efficiency is determined from thebattery charge level and the ability to start.

Advantages of the battery condition:

User

B

Control unit for power management J644


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Function diagram

Legend

E369 Central locking button for outer door handle,drivers side*

E370 Central locking button for outer door handle,passengers side*

E371 Central locking button for outer door handle,rear left*

E372 Central locking button for outer door handle,rear right*

E408 Button for access and start authorisationE415 Switch for access and start authorisation

F272 Outer door handle switch, drivers door*

F273 Outer door handle switch, passengers door*F274 Outer door handle switch, rear left*F275 Outer door handle switch, rear right*F305 Switch for gearbox position P**

G415 Sensor for outer door handle contact,drivers side*

G416 Sensor for outer door handle contact,passengers side*

G417 Sensor for outer door handle contact,rear left*

G418 Sensor for outer door handle contact,rear right*

J53 Star te r re layJ329 Voltage supply relay, terminal 15J386 Door control unit, driver's sideJ387 Door control unit, passenger's sideJ388 Door control unit, rear leftJ389 Door control unit, rear rightJ518 Control unit for access and

start authorisationJ623 Engine control unitJ694 Voltage supply relay, terminal 75xJ695 Starter relay 2J723 Antenna read-in unit for keyless access

authorisation*

R47 Antenna for central locking andanti-theft warning system

R134 Antenna on drivers side for accessaccess and start authorisation*

R135 Antenna on passengers side for accessaccess and start authorisation*

R137 Luggage compartment antenna for accessaccess and start authorisation*

R138 Passenger compartment antenna 1 foraccess and start authorisation*

* only for vehicles with Advanced Key** only for vehicles with automatic transmission

1 Terminal 50 ( to starter B)

2 CAN Conven ience High

3 CAN Convenience Low

4 P/N signal from control unit forautomatic transmission J217**

5 Terminal 58s ( lighting)*

6 Signal from brake light switch F*

Positive supply

Input signal

Output signal

Ground

Bi-directional line

13

Access and start authorisation


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The Advanced Key system was introduced with theAudi A8 '03 and has been fundamentally revised forthe Audi A6 05.The most important new feature is that the controlunit for access and start authorisation has beencombined with the actuator for steering columnlocking.


System overview


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1 Door control unit, driver's side J3862 Control unit for on-board power supply J5193 Control unit for access and start

authorisation J5184 Switch for access and start authorisation E4155 Central locking button for outer door handle,

driver's side E369Outer door handle switch in drivers door F272Sensor for outer door handle contact,drivers side G415

6 Antenna read-in unit for keyless accessauthorisation J723

7 Antenna on drivers side for accessand start authorisation R134

8 Door control unit, rear left J3889 Passenger compartment antenna 1 for

and start authorisation R13810 Door control unit, passenger's side J387

11 Central locking buttorear left E371Outer door handle swSensor for outer doorear left G417

12 Central locking buttopassengers side E37Outer door handle swdoor F273Sensor for outer doopassenger's side G41

13 Antenna on passengeand start authorisati

14 Door control unit, re15 Antenna for central l

anti-theft warning sy16 Central locking butto

rear right E372

Outer door handle swSensor for outer dooright G418

17 Boot antenna for accand start authorisati


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Division of functions

System control is broken down into three basicmodules:

the control unit for access andstart authorisation J518,

the antenna read-in unit for keyless accessauthorisation J723 and

the switch for access andstart authorisation E415.

All three components communicate with each otherover a local single-wire bus.The control unit for access and start authorisation isthe master of the system and a participant onConvenience. The same control unit is installed forall system versions.

The antenna read-in unit for keyless accessauthorisation is only installed with theAdvanced Key option. It serves as the interfacebetween the antennae, sensors and the control unitfor access and start authorisation.

The switch for access and start authorisation isinstalled in various versions, depending on thetransmission, radio frequency of the central lockingsystem and the Advanced Key option. An evaluationelectronic device is also integrated into the switch.


Accesstart author

J5

Switcaccess an

authoriE4


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Versions

The switch for access and start authorisation isavailable in the following versions:

with and without Advanced Key function with and without ignition key anti-removal lock for radio frequencies of 315 MHz, 433 MHz or

868 MHz

Functions

The switch for access and start authorisationincludes other functions apart from the ignitionswitch function:

Evaluation of the key position of the ignitionswitch:

The ignition switch evaluates the ignition keyposition using four switches.The switch information is transferred to thecontrol unit for access and start authorisation inbinary code via the local bus and also formonitoring purposes, via two lines.The lock barrel in the ignition switch is not codedmechanically, which means that the turningmovement can be performed with everyA6 '05 key.

Safety branch for the steering lock of the control

Switch for access and start authorisation E415

Emergency release


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Reading in position P of the automatictransmission from the switch for gearboxposition P F305:

The signal is used to activate the integrated,magnetic ignition key anti-removal lock. If thevehicle battery is flat, the key can be removed bypressing the mechanical emergency release.

Reading in the information from the button foraccess and start authorisation E408 (only forvehicles with Advanced Key):

For safety reasons, the positions of the button foraccess and start authorisation are evaluated bythe switch for access and start authorisation.

Reading in the information from the antenna forcentral locking and anti-theft warningsystem R47:

The switch for access and start authorisationpasses the data, which the vehicle key sends viaremote control, on to the control unit for accessand start authorisation. The control unitevaluates the data.

Reading in the signal from the brake lightswitch F (only for vehicles with Advanced Key):

To start the vehicle using the button for access



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The electromechanical steering column lock wasintegrated into the control unit for access and startauthorisation.

Functions

Terminal control:

The control unit for access and startauthorisation puts the information aboutterminal 15, 75x, 50, S and P onCAN Convenience.The control unit also activates the relays forterminal 15 and 75x and passes the start requestsignal on to the engine control unit.

Locking the steering

The motor and gearscolumn are integrateaccess and start authThe position of the lintegrated micro swiswitched on after the

Immobiliser and com

The control unit is thfunctions.

Control unit for access and start authorisation J518


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CAN Communication:

The control unit is a participant onCAN Convenience. Data exchange between allthe components of the access and startauthorisation system is performed via thecontrol unit.It is also the diagnosis interface for thecomponents involved. All data, e.g. code,immobiliser data, etc. is stored in the control unitfor access and start authorisation.

Reading in the P/N signal from the control unitfor automatic transmission J217:

The signal is used to activate the displaysrelating to engine start in dash panel insert J285.


326_062

SELECTN OR P

START THEENGINE


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Vehicle key

The key has a mechanically coded hinged bit for thelock cylinder in the drivers door and the tailgate/ boot lid. The transponder function is integrated intothe electronics and also works without a battery.An integrated battery powers the electronics for theradio remote control and Advanced Key functions.

A new feature here is the bi-directional data

exchange between the radio-control key and thecontrol unit for access and start authorisation viathe antenna for central locking and anti-theftwarning system R47. This is used to transfer thestatus of the central locking system into the key.If a button outside of the function range of the keyis pressed, the LED integrated in the key shows thelock status of the vehicle. The lock status displayedis always the status, which was achieved using thiskey when central locking was last actuated.If the vehicle is opened or locked in the interimperiod using a second key, this does not change thelock status in the first key.

Furthermore, the radio frequency is changed from433 MHz to 868 MHz for the first time in manycountries. This radio frequency is ideal for datacommunication between vehicle keys and thecontrol unit.

Since this frequency can only be used for very shorttransmission pulses, any interference fromlong-term radio transmitters, such as baby phones,wireless headsets, etc. is eliminated.

Vehi

Vehilast v

Signals from the key LED

Vehilast v

on

off

on

off

on

off

C i l i


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The control unit is only installed together with theAdvanced Key option.It is located at the right of the dash panel, behindthe glove compartment.

It evaluates the signals from the outer door handlesensors and then activates the antennae for accessand start authorisation.

The capacity-based operating sensors in the outerdoor handle detect any contact on the handle andsend a signal shortly afterwards to the antennaread-in unit for keyless access authorisation.The antenna read-in unit evaluates the signal andthen sends a query to the vehicle key via theantennae for access and start authorisation.

The sensors switch off after approx. 80 hours oncethe vehicle is locked or after 20 actuations withoutan authorised key.


Antenna read-in unit for keyless access authorisation J723

Sensors for outer door handle contact G415 - G418


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Four transmitting antennae are distributed in thevehicle and are used by the vehicle for radiocommunication with the vehicle key. The antennaetransmit on a frequency of 24.5 kHz. The vehicle keyevaluates all four signals and determines theposition in or on the vehicle based on the fieldstrength of the individual antennae.

The antennae are located:

in the rear doors in the centre console in the rear bumper

The start/stop button works in the same way as thebutton module, which was first used in the A8 03.For safety reasons, the button positions areevaluated both by the control unit for access andstart authorisation and by the switch for access andstart authorisation signal.

Antennae for access and start authorisation E134 - R138

Button for access and start authorisation E408



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Opening the vehicle


Antenna forcentral locking andanti-theft warning

systemR47

Antenna on driversside for access

start authorisation

R134

Antenna onpassengers side fo

access startauthorisation

R135

Switch foraccess and start

authorisationE415


authorisationJ723

Control unit foraccess and

start authorisationJ518

Door control unit,drivers side

J386


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1 The driver puts his/her hand into the finger wellof the door handle. The sensor for outer doorhandle contact G415 sends the information"Finger in finger well" to the antenna read-in unitfor keyless access authorisation J723.

2 The antenna read-in unit sends an alarm signalto the vehicle key via the antenna for access and

start authorisation R134.

3 The antenna read-in unit sends a signal to thevehicle key via all the antennae for access andstart authorisation.

4 Based on the signals, the vehicle key determinesthe position on the vehicle and sendsinformation to the antenna for central lockingand anti-theft warning system R47.

5 The antenna for central locking and anti-theftwarning system receives the information.The information is forwarded by the switch foraccess and start authorisation E415 to thecontrol unit for access and startauthorisation J518, where it is evaluated.

6 The control unit for authorisation sends vehicle" on to the ceconvenience systemunit, whose door han

7 The door control uniinstruction from the

start authorisation, aunlocks the door.

8 The central control usystem J393 sends thvehicle Advanced

9 The normal unlockinThis involves disarmacknowledgement flthe interior light. In acknowledgement flaccess and start authlock status to the vehaccess and start authfor central locking asystem R47.



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Starting the vehicle using the button


Antenna forcentral locking andanti-theft warning

systemR47

Antenna on driversside for access

start authorisationR134

Antenna onpassengers side fo

access startauthorisation

R135

Switch for accessand start

authorisationE415


authorisationJ723

Control unit for accessand start authorisation

J518

Button for accessand start

authorisationJ408


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1 The driver presses the button for access andstart authorisation E408 down fully. The buttonsends the information about "Ignition on" and"Engine start" both to the switch for access andstart authorisation E415 and to the control unitfor access and start authorisation J518.

2 The switch for access and start authorisation

passes the information from the button on to thecontrol unit for access and start authorisation viathe data lead. The two button informationmessages are compared there.

3 The control unit J518 sends a key query to theantenna read-in unit for keyless accessauthorisation J723.The antenna read-in unit sends a signal to thevehicle key via all the antennae for access andstart authorisation.

4 Based on the signals, the vehicle key determinesthe position in the vehicle and sends itsinformation to the antenna for central lockingand anti-theft warning system R47.

5 The antenna for central locking and anti-theftwarning system receives the information.The switch for access and start authorisationE415 passes the information on to the controlunit for access and start authorisation, whichthen evaluates it.

6 Based on the key evsent to CAN Convenunlocked.

7 As soon as the steeriterminal 15 is switch

8 Once terminal 15 haexchanged between the control unit for aauthorisation via thethen deactivated.

9 The control unit for authorisation sends the engine control uchecks whether the cwhether P or N is seautomatic gearbox aautomatic engine sta



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Immobiliser 4


The immobiliser 4 technology is used in theAudi A6 05.

This means that all components must be "taught"online, as is already the case with the Audi A8 03and the Audi A3 04.

The following components are integrated into theimmobiliser:

The control unit for access andstart authorisation

The engine control unit The vehicle keys

Control unit, which immobiliser

Control unit, which immobiliser

Master control unit

PC/mainframe

Immobiliser and component protection

E415 J518

J533


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New identity

As is already the case with the Audi A8 03 , if acontrol unit is stolen, it is no longer necessary(for safety reasons) to also replace the remainingcontrol units, which are integrated in theimmobiliser.In this case, the "New Identity" function must beused for the control unit for access and star tauthorisation and the engine control unit.It is only a matter of installing a new lock set beforeusing the "New Identity" function.

The switch for access and start authorisation E415reads in the key code in electronic form only.The hinged bit coding is not evaluated signal.The ignition switch is not part of the lock set for thisreason.

Component protection

As is already the case with the Audi A8 03, theConvenience and Infotainment control units are alsointegrated within the "Component protection" safetysystem.As a result, these control units must be adapted tothe specific vehicle once they have been installed.

Guided fault-finding

Function test

Teaching driving authorisationsystems

Testing query

The following options are available

1. Adapt the driving authorisation sythe existing immobiliser

2. Assign a new identity to the immre-teach the components

3. Terminate the function test


Function/component selection

Selecting a function or component

Body (Rep. Gr. 01; 50 - 97)

Electrical system (Rep. Gr. 01; 2

Switch for access and start authorisation E415



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External lights

Front headlights

Three different front headlights are used in theAudi A6 05:

Halogen headlights Bi-xenon headlights Adaptive light

Halogen headlights

Halogen headlights come as standard.The following lamps are fitted in the halogen on thevehicle equipment:

W5W lamp for parking light H1 lamp for high beam headlight and headlight

flasher H7 lamp for dipped beam headlight and dimmed

as a daytime driving light An orange PY21W bulb as the direction indicator

light

The daytime driving light in the halogen headlight isonly available for Canada and the Northerncountries (Scandinavia). It is active whenterminal 15 is switched on and the parking light ordipped beam light is off.

The following country-specific variants exist: The daytime driving light is part of the fog lights

for Canada and 3457NA flasher lamps are used for USA and

Canada.

A manual headlight range control system with

1 2 3


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Bi-xenon headlights

Bi-xenon headlights are installed with the"XenonPlus" option.The following lamps are fitted in the bi-xenonheadlight:

A blue W5W lamp for the parking light.The colour of the parking light thus correspondsto the xenon light.

A D2S lamp for high beam headlight, headlightflasher and dipped beam headlight. The coversfor dipped beam are also activated for high beamand headlight flasher operation.

A P21W lamp for the daytime driving light.This comes on dimmed to 90 %.

A PY21W bulb coated with a reflecting layer ofsilver is used as the direction indicator light.

Only longlife lamps are used. A super-longlifelamp is used as the daytime driving light.

The following country-specific variants exist:

No daytime driving lamp is fitted for Japan. 3457NA flasher lamps are used for USA and

Canada.

The headlights are changed over to left-hand drivevia a lever on the projection module.

A dynamic headlight range control system isinstalled for bi-xenon headlights.The dynamic headlight range control system uses

the well-known level sensors. This send theinformation about the vehicle level to the controlunit for headlight range control J431 via a pulsewidth-modulated signal.The same level sensor is fitted on both the front andrear axle.



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Adaptive light

The adaptive light works as a dynamic corner-sensitive headlight. With the dynamic corneringheadlight, the headlight projection module ispivoted horizontally by an integrated motor.The headlight lenses and the bracket do not turn.The pivot angle is approx. 15 on the inner curveside and 7.5 on the outer curve side.

The various pivot angles have advantages in thatthey provide better lighting for corner routes.In this case, the inner-curve module pivots in twiceas much as the outer-curve module.This achieves the maximum possible illuminationwidth with homogeneous light distribution.

No pivoting when vehicle is stationary

The projection modules are not pivoted at driving

speeds of < 6 km/h.The pivot angle essentially depends on the steeringwheel angle at speeds of more than 10 km/h.This complies with the legal requirement that theheadlights must not be pivoted when the vehicle isstationary. At the same time, a slight transition toheadlight pivoting occurs during acceleration from

Pivot range


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Internal structure

The pivot angle is monitored by an inductive pickupin the pivot module. The pickup value is evaluatedimmediately in the relevant power module forheadlights as a pulse width-modulated signal.If the motor or pickup does not function, the powermodule sends an error message to the control unitfor headlight range control J431.

This is communicated to the driver in a display indash panel insert J285.

The same lamps that are used in the bi-xenonheadlight are also used in the adaptive lightheadlight.

CAN Communication

The values marked with (*) are used as inputvariables in calculating the pivot angle.All other input variables are only needed fordynamic headlight range control.

Control unit for headlight range controlJ431

Gas discharge light L13/L14

Control motor for dynamiccornering light V318/V319

Magnet foN395/N39



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Signal and data exchange

The same sensors that are used for dynamicheadlight range control for bi-xenon headlights arealso used as level sensors. They send a pulsewidth-modulated signal to the control unit forheadlight range control. Data is exchanged betweenthe control unit for headlight range control J431 andthe power modules in the headlight on the left J667and right J668 via a 500-kBaud CAN.

Show Room function

The Show Room function can be used to pivot theheadlights by moving the steering wheel evenwhen the vehicle is stationary for presentation.

The function can be adapted using the diagnosistester in the control unit for headlight beamadjustment.If the vehicle is then driven at more than 30 km/h,the function is permanently disabled. The functioncan be switched on again at any time using thediagnosis tester.


Function/component selection

Selecting a function or component

Body (Rep. Gr. 01; 50 - 97)Electrical system (Rep. Gr. 01; 2

01 Self-diagnosis systems

55 Dynamic headlight ran

J431 Dynamic headligh

J431 Contr. unit, headJ431 Control unit forJ431 Contr. unit, headJ431 Control unit forJ431 Control unit forJ431 Control unit forJ431 Contr. unit, head

J431 - Contr. unit, headJ431 Contr. unit, head


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Back lights

Different tail lights are used in the Audi A6 05,depending on the equipment variant.

This is differentiated into the following:

Basic variant ECE High variant ECE High variant SAE

Basic variant ECE

The tail light in the basic variant only uses lamps

with a 15-mm bayonet socket for the lights.There are three sections for tail light activation.To ensure that the different-sized sections look fromthe outside to be equally illuminated, the centralcontrol unit for the convenience system J393activates each lamp with a different dimming ratio.

The two inner lamps in each back light are also usedas the brake light.

The outer lamp functions as the "rear fog light".If the rear fog light is on, only the inner lamp isactive as the brake light.

Tail light andrear fog light

Direction indicator light R



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High variant ECE

These back lights are installed if bi-xenon headlightsat least are fitted as the front headlights.The external feature of the High back lights is theuse of LEDs for the brake light.The LEDs, which are fixed in the reflector housing,are activated by two contacts from the lampbracket.

The rear fog light is located at the bottom of the

back light. Here, the lamp on the drivers side isused as the rear fog light, while the lamp on thepassengers side serves as the reversing light.This means that the same lamp bracket can be usedfor both the High back light and the Basic back light.

Directionindicator light

Rear fog light

Brake light

Tail lights


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High variant SAE

The back lights for the North American market havestandard LED units. The LED units are used for theindicator and brake light function.The three sections underneath are for the tail lightlamps.The SAE back lights have two rear fog lights and tworeversing lights.

LED unit diagnosis

The failure of an LED is detected by the electronicsin the lamp housing. All LEDs are then switched offso that the central control unit for the convenience

system J393 can set the relevant fault memoryentry.

Brake light anddirection indicator light

Rear fog light



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The control unit in dash panel insert J285 isavailable in two variants.The High-Line variant with colour display onlycomes in vehicles with adaptive cruise control.

As in the A8 '03, the anti-drive-off feature andgateway are no longer integrated into the dashpanel insert.The handy position of the rotary light switch hasmeant that the indicator lights for dipped beamheadlight, fog light and rear fog light could also befitted directly in the rotary light switch.Likewise, the buttons for instrument lighting, theauto-check system and the daily mileage counter

are now positioned to the right, next to the dashpanel insert, in the button module (operatingbuttons for dash panel insert E493).

Control unit in dash panel insert J285


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Function diagram

Legend

E493 Operating button for dash panel insert

F1 Oil pressure switchF34 Warning contact for brake fluid level

Additional signal

1 Terminal 58d



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Functions

The main function of the control unit for on-boardpower supply is to read in switch information andactivate power outputs.It is familiar from the Audi A8 03 and has beenadapted to new functionalities in the Audi A6 05.

Master functions

The following master functions are implemented inthe control unit for on-board power supply.

External lighting control LIN master for the control unit for

wiper motor J400 LIN master for the sensor for rain and

light detection G397 (for details of function,see Sensor for rain and light detection)

Stand-by master function

If the central control unit for the conveniencesystem J393 fails, the control unit for on-boardpower supply J519 takes over the stand-by masterfunction. It sends the information for directionindicators to the CAN bus.

Control unit for on-board power supply J519

G397


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Emergency function

The software for the control unit for on-board powersupply can be used to implement emergencyfunctions. If a fault is detected in the rotary lightswitch or if there is an open circuit in the line to therotary light switch, the control unit for on-boardpower supply switches the driving light on.

Other functionalities

In addition to the master functions, the followingfunctions are also available in the control unit foron-board power supply.

Steering column adjustment Footwell lighting Selector gate lighting Direction indicator control, front and side Signal horn activation Windscreen washer pump activation Steering column memory

Versions

There are three functional versions of the controlunit for on-board power supply:

Low-Line version (with no electric steeringcolumn adjustment, no xenon, no daytimedriving lights)

Mid-Line version (with no electric steeringcolumn adjustment, with xenon and daytimedriving lights)

High-Line version (with electric steering columnadjustment, xenon and daytime driving lights)



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Function diagram

E1 Light switchE3 Hazard warning light switch

K4 Indicator light foK6 Indicator light f


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N395 Magnet for cover adjustment,left headlight

Additional signals



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System overview

Hall sender 1 for vertical adjustment of thesteering column

Hall sender 2 for axial adjustment of thesteering column

Bonnet switch for anti-theft warning system

Rotary light switch Hazard warning butt

Switch for reversing Sensor for rain and l

Front direction indicator lights, left and right Side direction indicator lights, left and right Front parking light, left and right Dipped beam headlight, left and right High beam headlight, left and right Fog lights, left and right

Relay for headlight cleaning system Windscreen washer pump Control unit for wiper motor (via LIN bus)

Supply, terminal 58 Front footwell lights Relay for dual-pitch Steering column adj Selector lever lightin Indicator light for ha

Magnets for cover aHeadlights (left and

The control unit for on-board power supply J519 evaluates the following input signals:

The control unit for on-board power supply J519 controls the following loads:


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Diagnosis

Basic settings

After the control unit for on-board powersupply J519 or the steering column or the switch forsteering column adjustment E167 is replaced, abasic setting in axial and vertical position must beimplemented for the steering column.

Actuator test

An actuator test can be used to carry out thefollowing checks:

Indicator light for hazard warning lights K6 Lamp for parking light, left M1 Lamp for parking light, right M3

Lamp for dipped beam headlight, left M29 Lamp for dipped beam headlight, right M31 Lamp for high beam headlight, left M30 Lamp for high beam headlight, right M32 Lamp for left fog light L22 Lamp for right fog light L23 Lamp for daytime driving light, left L174 Lamp for daytime driving light, right L175 Direction indicator lights, left

Direction indicator lights, right Footwell light, left W9 Footwell light, right W10 Wiper, top turning position Wiper, bottom turning position Windscreen washer pump V5 Relay for dual-pitch horn Terminal 58

Coding

The control unit for on-board power supply J519 canbe coded for the functions



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A combined sensor for rain and light detection isused for the first time in the Audi A6 05.The sensor includes a light-control assistantfunction, which relieves the driver of the job ofhaving to switch the driving light on manually, aswell as a wiper control function, which depends onthe amount of moisture on the front windscreen.The development goal here was to integrate thesefunctions in a compact housing.

The sensor is connected as a LIN slave to the controlunit for on-board power supply J519.

Installation position

The sensor for rain and light detection is located onthe windscreen in the attachment base of theinterior mirror.

Tasks of the light sensor

Switch the driving light on and off automatically Activate the Coming Home/Leaving Home

function Day/night detection for rain sensor

Switch-on conditions

The light sensor supplies the control unit foron-board power supply with information forswitching on the driving light in the followingsituations:

LIN

Sensor for rain and light detection G397


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Function of the light sensor

In order to detect certain ambient conditions, suchas tree-lined avenues or routes through tunnels, thelight sensor registers the light intensity in twoareas.The global field describes the direct brightness onthe vehicle, while the fore-field describes thelighting conditions in the section of road lyingahead of the vehicle. This is activated using the"Auto" setting on the rotary light switch.

Tasks of the rain sensor

The following functions are implemented,depending on the amount of water on thewindscreen:

Switch the wiper on and off automatically at

seven different speeds Activate the driving light when it is raining

Activation

The rain sensor is activated by positioning the wiperstalk to the "Intermittent" setting The driver can

Globa

N



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Function of the rain sensor

The rain sensor uses the physical light refractionprinciple to register the amount of moisture on thewindscreen. The circular LEDs integrated in thesensor emit infrared light through the windscreenfrom within the interior of the vehicle.

If the windscreen is dry, the infrared light is

reflected on the surface of the glass.The photodiode integrated in the centre of thesensor thus records a high light intensity.

If the windscreen is covered with moisture, theoptical properties on the surface of the glasschange. Light now emerges from the windscreen

surface through the light refraction caused by waterdrops. As a result, less light is reflected back and thephotodiode records a lower light intensity (lightdispersion principle).


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The control unit for wiper motor J400 wasredesigned for use in the new Audi A6 05. As isalready the case in the Audi A8 03 and Audi A3 04,the control unit and wiper motor are integrated intoone housing.

It is linked to the control unit for on-board powersupply J519 as a LIN-slave control unit.

Functions

Intermittent Intermittent stages (four) One-touch wiping Wiper function stage 1 Wiper function stage 2 Wipe over again 5 seconds after the last

wash-and-wipe action(at vehicle speed > 5 km/h only)

Rain sensor function (see Sensor for rain andlight detection G397)

Service setting Alternating parking position (can be coded)

Function diagram

G397 Sensor for rain and light detectionJ400 Control unit for wiper motorJ519 Control unit for on-board power supply

Note

Control unit for wiper motor J400


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Function diagram

Legend

E316 Glove compartment button

Additional signals

1 CAN Convenien



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The tilt sensor for the anti-theft warning system isintegrated directly in control unit 2 for on-boardpower supply J520 in the new Audi A6 05.The fluid-filled sensor registers changes in thevehicle tilt both transversely and longitudinally,thereby preventing incorrect triggering as a result ofshaking through viscous fluid and electronic delay.The current tilt values can be read out usingmeasured-value blocks.

Diagnosis

Measured-value blocks

Measured-value blocks are available for thefollowing functions:

Servotronic Sliding roof Tilt angle

Actuator test

Checks can be carried out for the followingfunctions, depending on the version:

Glove compartment release Servotronic valve Sliding roof activation (can be measured

using a multimeter on the on-board powersupply control unit, sliding roof does notopen, however, if it is not released by thecentral control unit for the conveniencesystem)

Note

The tilusing

Refere

For fufunctioAudi A

Tilt sensor for anti-theft warning system


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The central control unit for the conveniencesystem J393, with which you may be familiar fromthe Audi A8 '03, is used in the Audi A6 05. The tasksand functions have been adapted according torequirements.The control unit is a participant on theCAN Convenience data bus.

Master functions

The master functions of the central control unit forthe convenience system are as follows:

Direction indicator master Central locking master Interior lighting master

LIN master for alarm horn H12 and sensor forpassenger compartment monitoring G273

Other functionalities

In addition to the master functions, other functionsare also available in the central control unit for the

convenience system. The power outputs integratedin the control unit activate the following loads:

Back lights Rear sun blind Rear window heating Rear footwell lights Boot light Tailgate/boot lid release

Versions

Two versions of the central control unit for theconvenience system are available:

Central control unit for convenience system J393



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The central control unit for the convenience systemis installed above the battery in the rear right of theboot.

System overview

Tailgate/boot lid "softtouch" Tailgate/boot lid locking cylinder closed Brake light switch Brake light signal from control unit for ABS with

EDL J104 Garage door opener (adaptation flashing)

Crash input Tailgate/boot lid con Tank plug lock detec Alarm horn H12 (vi Sensor for passenge

monitoring G273 (v

The central control unit for the convenience system J393 receives the following input signals:


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Interior lighting control

Standard equipment function

The standard function includes activating the insidelight in the roof lining, the front footwell lights, theglove compartment light and the boot light.The central control unit for the conveniencesystem J393 activates the inside light in the rooflining, the boot light and the glove compartmentlight directly via its own outputs and inputs. Thecontrol unit for on-board power supply J519activates the front footwell lights via CAN messagesfrom the central control unit for the conveniencesystem J393.

Additional equipment function (light package)

The light package additional equipment alsoincludes a door contour light in every door as wellas footwell lights (front and rear), which are basedon LED technology. The door contour lighting isactivated by the door control unit, which receivesthe CAN messages for this from the central controlunit for the convenience system J393.



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Function diagram

C18 Interference filter for windscreen antenna

E26 Switch for glove compartment light

J9 Relay for rear wiJ393 Central control un

L46 Lamp for rear fo


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V53 Motor for tailgate/boot lid central lockingV91 Motor for rear sun blindV155 Motor for tank cap locking

Additional signals

1 CAN Convenien



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Diagnosis

The central control unit for conveniencesystem, J393, has the usual diagnostic functions,such as read fault memory, read measured valueblocks, adaptation, coding, as well as selective andsequential actuator test at its disposal.

Actuator test

The selective actuator test initiated by the diagnosistester can be used to check the following actuators:

Indicator light for safe central locking K133(in door rim)

Lock central locking signal (once) Activate safe locking for doors (once) Unlock central locking signal Lock filler flap Unlock filler flap Lamp for left brake light M9 Lamp for right brake light M10 Lamp for high-level brake light M25 Lamps for tail light, left Lamp for parking light, left M43 Lamps for tail light, right Lamp for parking light, right M44 Lamp for reversing light, left M16 Lamp for reversing light, right M17 Lamp for direction indicator light, rear left M6 Lamp for direction indicator light, rear right M8 Lamp for rear fog light, left L46 Lamp for rear fog light, right L47

Coding

Note

In addthe diaof a se

Number plate light X Boot light W3 Footwell light, rear l Footwell light, rear r Activation of rear lid

(rotary latch opens, Motor for rear sun b

both directions) Signal for rear wind Interior lighting


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You may already be familiar with the acousticparking aid function "APS" from the Audi A3 04.For use in the Audi A6 05, a 4-channel system withsensors on the rear bumper and an 8-channelsystem with sensors on the front and rear bumpersare available.

Versions

The parking aid control unit will be available as4-channel system and 8-channel system versions.Only the 4-channel version is available on theAudi A6 05 for the US market.


The parking aid control unit is installed above theright wheel housing in the boot. It is secured in aframe under the control unit for trailer detection.

Function

The area around the vehicle is monitored by fourultrasound converters integrated into the frontbumper (8-channel system only) and fourultrasound converters integrated into the rearbumper. The acoustic message comes from a tonegenerator in the front area of the vehicle and a tone

Parking aid control unit J446



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Input and output signals

The parking aid control unit J446 requires CAN busmessages from various control units.

4-channel system control units:

Control unit for on-board power

supply J519

Reversing light on

Control unit for trailer detection J345

Trailer detected

Data bus diagnosisinterface J533

Control unit for access andstart authorisation J518

Terminal 15 CAN, key number

Control unit for ABS with EDL J104

Speed

Control unit for autom. gearbox J217

Selector lever position

Control unit for on-board powersupply J519

Reversing light on

Data bus diagnosisinterface J533

8-channel system control units:

D l i J386 J389


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The door control units have a similar functionality tothose used in the Audi A8 03 and are used in theAudi A6 05 with appropriately adapted functionsand actuation features.The separate installation of the door control unitand the power windows motor is new here.

Stand-by master function

As in the Audi A8 03, the door control unit on thedrivers side J386 controls central locking if thecentral control unit for the convenience systemJ393 fails. If there is no communication between the

drivers-side door control unit J386 and the centralcontrol unit for the convenience system J393, theother door control units evaluate the informationfrom the drivers-side door control unit directly.In this case, it is no longer possible to open thevehicle via remote control or Advanced Key.

Diagnosis

The address words 42, 52, 62 and 72 "Doorelectronics" offer diagnostic options, such asmeasured-block reading, coding or the selective / sequential actuator test (the selective actuator testis used for the targeted activation of actuators).

Versions

Installation position of drivers-

Door control units J386 - J389

System overview



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System overview

Power windows switch Internal locking switch Actuating elements for central locking Actuating elements for central locking

(Safe mode) Outer door handle switch (optional) Central locking button for outer door handle

Boot release switch E164

Switch for remote unfiller flap E204

Child-lock button E Mirror adjustment ch Mirror adjustment sw Mirror adjustment sw

folding function E16

Switch for alarm sys Switch for passenger(optional) E183

Additional signals for front doors

Operator unit for memory Mirror position sensor

Additional loads for drivers door

Contact switch in lock barreldrivers side F241

Central locking motors Central locking motors (Safe mode) Door warning lights Entry l ights Lighting for inside door handle

A bi li h i f d ( i l)

Additional loads for fron

Mirror adjustment m Mirror folding moto Heated door mirrors

A i i d

The door control units receive the following input signals:

The door control units activate the following loads:

Control units for seat adjustment


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The control units for seat adjustment can be used toset up to 8 individual seat positions for anelectrically adjustable seat. The seat positions canbe stored in memory and can be set again ifnecessary using the memory keypad or by enteringa radio code.


The control units for seat adjustment are located inthe floor area under the drivers and passengersseat.

The control unit can be used both for the driversseat and for the passengers seat by assigninga PIN code in the connecting plug.The unlearned/uncoded control unit is thus codedautomatically for either the drivers seat orpassengers seat installation position dependingon the pin when it is first connected to the seat.This operation can only be performed once, but canbe released again by means of the diagnosticfunction (in the Conditioning menu item).

Diagnosis

The following diagnostic functions are available

under the address words 36 Seat adjustment,drivers side and 06 Seat adjustment, passengersside:

Read measured-value blocksCoding

Control units for seat adjustment



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Input and output signals(drivers seat)

Function

The control unit for seat adjustment powers thepositioning motors in the seat directly using its loadoutputs. The position detection function of thepositioning motors is implemented using hallsensors. The drivers-side door control unit reads inswitch information from the operator unit formemory, drivers seat E97 as voltage-codedinformation and sends this via CAN Convenience tothe control unit for seat adjustment withsteering-column adjustment memory J136.The control unit for seat adjustment with

steering-column adjustment memory reads ininformation from the switch for fore-and-aft andheight adjustment, drivers seat E61, the switch forbackrest adjustment, drivers seat E96 and theswitch for tilt adjustment, drivers seat E222 directly.The drivers side door control unit J386 reads in the

Data bus diagnosis interface J533

Door control unit, driver's side J386

Switch for fore-and-aft adjustment, drivers seaSwitch for backrest adjudrivers seat E96Switch for tilt adjustmedrivers seat E222

Control unit for seat adjsteering-column adjustmJ136

Operator unit for memory,drivers seat E97

Discrete lead "Seat memory

Seat symmetry positioning


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y y p g

The "Symmetry positioning, drivers seat/ passengers seat" option, which is available in theMMI, can be used to move the passengers seat intoa symmetrical position in relation to the driversseat. The MMI sends a corresponding instruction tothe drivers seat control unit via theCAN Convenience bus. The control unit then sendsthe current seat position and a control instruction tothe passengers seat control unit, which positionsits motors accordingly.

Comfort side view

The "Comfort side view" option moves the

passengers seat into a position that hides thevehicles B-pillar, thereby ensuring that the driverhas the best possible view out of the vehicle.The function can be selected via the MMI, where thesignal is transmitted in the same way as for the"Seat symmetry positioning" function.

Memory retrieval

Radio code memoryPersonal button memory

The stored memory settings can be retrieved inthe following ways.

Multimedia Interface (MMI)

Infotainment


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u t ed a te ace ( )

Equipment versions

As in the current Audi A8 03, the MMI operatingconcept is now also integrated as standard in thenew Audi A6 05. Data is transferred between theindividual Infotainment control units via MOST bustechnology and the process is technically identicalto the Infotainment system in the currentAudi A8 03. Driver-relevant functions, such ason-board computer or navigation, are displayed inthe centre display of dash panel insert J285.Selected functions for the telephone, radio andCD control and volume control can be operatedusing the multi-function steering wheel.

Unlike the current Audi the control unit for the frmaster control unit in thare installed in the Audioptional equipment seleThe Basic, Basic Plus anhave the same hardwareexpanded to include the The MMI High version,same hardware as the cuFurthermore, the data buwhich assures communinetworked components to the MOST bus.

Display elements in the optimum field of vision

S i f di l d i


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MMI Basic

Standard equipment in the new Audi A6 includesMMI Basic with the MMI operating concept, a7" monochrome display (J685) in the dash panelinsert as well as an integrated, analogue radio tunerand 4x antenna diversity, CD drive and a 2x20-wattamplifier.

In principle, these drivers are available in allversions of the control unit for frontinformation J523.In the MMI Basic version, the loudspeakers that areintegrated into the front doors are connecteddirectly to the control unit for frontinformation J523.If the Standard Sound System or BOSE option isinstalled, this internal amplifier is deactivated via

coding. The loudspeakers are then connected to therelevant digital sound package control unit J525.

Digital tuner technologyAudi A6 at a later date. question, a satellite radioterrestrially emitted, buttransmissions will then b

Front informationare used

in the testerJ685

Multimediaoperating unit

E380

Antenna boosterR24

Loudspeakerfront

Control unit for front information J523+ Radio R+ CD player R89+ Amplifier R12 (active)

Antennaamplifier 2

R111

MMI Basic Plus

Infotainment


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As an option, the MMI Basic system can beequipped with additional functions in the radio andsound field in the form of a "Plus" version.This includes, for example, a TP Memo function,which enables the recording of trafficannouncements for a duration of eight minutes intotal.A programmable recording period can be used toprovide up-to-date traffic announcements beforestarting a journey. Stored traffic messages are

automatically deleted after six hours to ensure thatthey are always up-to-date. Instead of the integratedamplifier, the standard sound system with its owndigital sound package control unit J525 will be usedas standard as of this MMI version.The internal amplifier can be deactivated via codingin this and later MMI versions.


in the testerJ685


E380

Antenna boosterR24

Control unit for front information J523+ Radio R+ CD player R89

Antennaamplifier 2

R111

Refere

PleaseinformMemo

Steering columnelectronics

J527

Multi-functionsteering wheel

J453

MMI Basic Navigation


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The MMI Basic Plus is available on request with abasic navigation function. For this purpose, anavigation module is integrated into theinformation control unit J523. Optical routeguidance is provided on the central display in thedash panel insert. The destination is entered usingthe MMI operating system with its central knob/ pushbutton.Audible directions for route guidance are alsooutput via the sound system.

The data required for navigation is read in via theintegrated CD drive.


in the testerJ685


E380

Antenna boosterR24

Antennaamplifier 2

R111

Control unit for front information J523+ Radio+ Navigation with CD drive J401

CD changerR41

Telephone

transmitter andfor telephoneR36

Data bus diagnosisfor data bus

J533

Antenna forNavigation

R50Steering column

electronicsJ527

Multi-functionsteering wheel

J453

MMI High

Infotainment


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The MMI High comes with the 7" colour display.The standard equipment of the Top system inAudi A6 05 Infotainment includes an RDS dual-tuner, the standard sound system and a 6x CDchanger in the glove compartment. As an optionalextra, this MMI version is also available with DVDnavigation, which is already used in the current A803, as well as the voice operator system with thevoice input control unit J507 as a plug-in module ofthe radio module R.

Only in this MMI version can drivers choosebetween the fixed telephone module and the mobilebaseplate. The well-known analogue TV tuner R78 isalso available at present as an optional extra.


in the testerJ685


E380

Control unit for front information J523

CD hTelephone

transmitter and

TV tunerR78

Radio

Navigationwith CD drive

J401

Refere

InformsystemAudi A

Antenna boosterR24

Antennaamplifier 2

R111

Function overview and menu structure of the MMI operator system


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q Radio main menu Dynamic

transmitter list

Memory Memory l ist

Band FM (ultra-short wave) MW (medium wave) LW (long wave) DAB* (Digital Radio)

Sound

Manual Manual forward Search forward Save transmitter Play transmitter

Search back Manual back

q Radio setup Traffic programme

Regional setting Transmitter reception Transmitter display Alternative frequency PTY filter

D l l

q CD/TV main menu CD title TV transmitter

Changer CD list

Source CD TV External AV source

Sound

Manual Forward Back One title back One title forward Title mix

Play title Name CD

q CD/TV setup CD

Repeat

Show CD text TV

Brightness Contrast Colour

Pi f

q Address Book mainmenu

Find entry View list New entry Delete address book

Infotainment


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q NavigationNavigation

Country City/Postal code Street Special dest. Route guidance

Start

Z-destination 1...3 Destination

Memory Last destinations Top special dest. Destination from

address book Save current dest. Save route Load route

Route Route criteria Distance list Route with

stop-off destinations Route without

stop-off destinations Block route

from here

Map Zoom Map menu

Nav Info Destination

q Info main menu TMC message list

TP memo Message retrieval

Sources

q Info setup

TP memo timer TMC display filter

q Car main menu

User User 1 - 4 User management

On-board manual Shor t Guide Drivers Manual Audi MMI

Maintenance

Maintenance Ambient lighting Acoustic Parking

System External lighting Battery charge level Vehicle registration

number Windows Instrument cluster Tyre pressure

control system Windscreen wiper Seat adjustment Mirror adjustment Central locking

Antenna systems


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The antenna system in the new Audi A6 05 isintegrated as a module in the top area of the rearwindow, to the left and next to the third brake light,on the right.The modules are responsible for the varioussystems, e.g. remote central locking, radio, TV or theradio receiver for the auxiliary heater.Only the modules that are required for therequested optional extras are installed.

The table shows the releavailable vehicle equipmthe various, worldwide cThe modules "DAB" andradio systems, which wibased on either a satellit(SDARS) or a terrestrial

Module 1Module 3 Module 4

Mo

Module 5

Module 7

AM / F M - D i v / T V 1 - 2 Third brake light T V3-4 /R

lo ckin g

Module 1: Radio/antenna amplifier R24Module 2: Remote central locking/antenna amplifier 2 R111Module 3: GPS/antenna for GPS navigation R50Module 4: Mobile phone antenna USA/Antenna for telephone,

navigation, auxiliary heater R66

Module 5: Roof antenna/annavigation R5

Module 6: Block ci rcuitModule 7: Telepass antenna

Infotainment

Control unit for front information J523


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If you order the Audi A6 05 with the MMI versionsBasic, Basic Plus or Basic Navigation, thefunctionalities like sound system or a CD-basednavigation module are integrated into the controlunit for front information J523, depending on thevehicle equipment.

The control unit for froninstalled in the glove coversion.The "High" version, whicurrent Audi A8 03, is lunit for front informatiodisplay.

MMI Basic MMI B

1-DIN housing X

Interface MOST X

Power supply X

AM/FM tuner for ECE andNorth America

X

CD drive X

2x20-watt drivers X

ZF output for antenna diversity X

Traffic programme recording(8 minutes)

Integrated GPS receiver

Navigation computer with memory

Voice output for navigation


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The control unit for front information J523 includesan enhanced TP recording system in the StandardPlus and Standard Navigation versions. This is aprogrammable traffic programme recordingfunction, which is possible via the MMI operatingsystem.Two different start times can be set. The trafficbroadcasts that are received are recorded for aduration of 2 hours from the relevant start time.

This setting remains unchanged until the timerfunction is switched off or the programmed timesare changed. A memory with a recording capacity of8 minutes is available for the recording. When thememory is full, the oldest messages are overwritten.

The CD-based navigation function is integrated asan optional module in the display and operatingunit for front information J523.If this equipment is installed, the vehicle comes withthe antenna module R50, the antenna forGPS navigation in the top area of the rear window(see Chapter Antenna systems). This antennadelivers the GPS signal. If the mobile baseplate wasalso requested, the vehicle has a roof antenna(antena for radio, telephone, navigation R52), whichsupplies the GSM and GPS signal. All other inputsignals are only supplied by networking the relevantcontrol units. Playback of the stored messages canalso be controlled via the MMI. It is possible toselect here whether you want to play the entiresequence or only one particular message.

Functional features of thfunction:

Position-finding throentry/selection

Interactive journey pstop-off destinations

Selection of route op

Route guidance (acoin display on dash p

Dynamic route guidadata

Audible navigation dpackage control unit

Storage and manage

Output of position d(e.g. for Audi telema

Search for importedaddress book

Navigation input signalsDistance signal fromEDL J104, signal fro

Output signals to the vehGPS time including digital sound system

Infotainment

Diagnosis on the control unit for front information J523


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Although functional modules are integrated into the

control unit for front information J523, the relatedaddress words for diagnosis in the VAG tester areretained.

The control unit for fron

support the Basic settingfunctions. The control ube flashed via the integr

Modules

Overview of the availablediagnostic functionsfor each module

Control unit forfront information

J523

Amplifier,2x20-watt

RadioR

CD

Control unit identification X

Measured-value blocks X

Basic setting

Overview of the available diagnostic functionsfor each module

Overview of the address words of the modulesin the control unit for front information, whichare used in the tester

Control unit forfront information

J523

Amplifier,2x20-watt

RadioR

CD ROR

Address word 07 47 56 0E

Overview of the measured-value blocks availablefor the individual modules


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Module Designation

General measured-value blocksfor all modules

General: Battery positive voltage, terminal status

MOST: Address, MOST FOT temperature, optical lowering

Status of ring break diagnosis line

Control unit identification:Serial number, flash date, hardware and software version

Control unit for front informationJ523

Multimedia operating unit E380: Status of main buttons, status of knobvolume controller status

Display: LCD display temperature

Signals: Terminal 58D, terminal 58S

Integrated amplifier,2x20-watt

Status of input signals, status of mute lead, speed (GALA), temperature

Radio R Remote-feed antenna: Open circuit, OK, short circuit

Remote-feed ZF output: Open circuit, OK, short circuit

Transmitter receive-level (0... 100 dBV)

CD ROM drive R92 CD status: Button status (Play, Stop, etc.), Eject button status, status of

Control unit for navigationwith CD drive J401

Route Info: Speed, direction of travel

GPS: Satellites received, status of remote-feed GPS antenna OK, short

GPS FIX: GPS information on satellite reception and position-finding

Drive: Status of CD drive, incorrect or no navigation CD inserted, LoadCD drive overheating

Status of navigation CD

Infotainment

Coding variants of the control unit for front information J523


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Versions: Basic, Basic Plus andBasic Navigation

Decimalplace

Description

1. Country version: D, GB, USA, F, E, I, P

2. Equipment: ACC, Internal light package, Acoustic parking system, front

3. Equipment: Acoustic parking system, rear, Tyre pressure control system, Air suspension

4. Equipment: Seat memory, front/rear, Left-hand drive

5. Equipment: Standard sound system installation, Body variant, Leather equipment

6. Equipment: On-board computer

7. Reserved

Infotainment control unit holder

In the new Audi A6 05, the control units responsiblefor Infotainment are mainly stored in a compactholder behind the left wheel cut-out in the boot.Only the control unit for front information J523 isinstalled in the dash panel, either in a visibleposition in the glove compartment (Basic version) orbehind the glove compartment (High version). Thedual-band compensator, the mobile phoneamplifier R86, is fitted on the rear right wheel well.

Sound systems


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Different sound system versions are available forthe new Audi A6 05. A general feature of thesystems is the two subwoofers integrated into thefront doors. A central subwoofer is not installed inthe rear storage area in the Audi A6 05 a standardfeature in other model series.

The base frequencies, which cannot be localised for

the human ear, are amplified by the two tuners inthe doors and are used to round off the audiopattern in the interior of the vehicle. This savesspace in the rear area, which increases the bootvolume and leaves more room for installing othercontrol units.

The new Audi A6 05 is equipped with a two-wayloudspeaker system in the front doors as standard.The related amplifier with two 20-watt drivers isintegrated into the control unit for information J523.

Diagnosis of the standard amplifier module isperformed using the address word 47 in theVAS diagnosis tester. The possible diagnosticfunctions are contained in the list of diagnosticoptions for the control unit for front informationJ523 on page 78 in this chapter.

Audi A6 05 front door with subpositions

2

Standard sound system

If the optional Standard sound system is selected,

Infotainment


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t e opt o a Sta da d sou d syste s se ected,

the vehicle will not have the 2x20-watt amplifiermodule in the control unit for front informationJ523. This sound system has an external 7-channelDSP amplifier, the digital sound system controlunit J525, which is integrated into the MOST bus.It controls the three-way systems in the front doors,the two subwoofers in the front doors, the 2-waysystems in the back doors and the centreloudspeaker in the dash panel. The standard sound

system comes as standard in the MMI versionsBasic Plus and MMI High.

Reference

Information on the functional features of thedigital sound system can be please refer to theSSP 293, Audi A8 03 Infotainment.

1 Mid/high-pitch loud2 Low-pitch loudspea3 High-pitch loudspea

mid/low-pitch louds4 Control unit for digi5 Mid/high-pitch loud6 Low-pitch loudspea7 High-pitch loudspea

mid/low-pitch louds

1

2

3

4

Standard sound system diagnosis


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y g

The diagnosis process is effected via addressword 47 as in the case of the series equipment,however, the separate control unit for digital soundsystem, J525, is now addressed. In addition toreading the measured-value blocks and the faultmemory for all loudspeaker channels involved,selective actuator tests are also available.The digital sound system control unit participates in

component protection.

Measured-value block Desi

01 General: Battery positive voltage, terminal stat

02 MOST: MOST address, FOT temperature, opt

03 Status of ring break diagnosis line

04 System: Analogue/digital unit temperatures in

05 Microphone: Voltage readings at microphone i

50 Control unit identification: Year of manufactur

51 Control unit identification: Serial number

No. Designation

Available actuator tests

BOSE sound system

The new Audi A6 05 comes with a BOSE sound

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system, which mainly comprises components fromthe current Audi A8 03. The division of thesubwoofer function into two individual subwoofersintegrated into the front doors means that thewell-known 7-channel DSP BOSE amplifier mustprovide an additional output for the secondsubwoofer driver in the front right-hand door. Theline-out output of the amplifier is used for thispurpose. This output signal feeds an external 100-

watt driver, which is integrated into the subwooferin the front right-hand door.

The current BOSE amplifier is replaced by a newdevelopment with the launch of the Avant.All eight drivers for the BOSE sound system are

then integrated into this new Avant amplifier.Given this, it will be important to note the exact partnumbers and the related model year when replacingcomponents of the BOSE sound system in thefuture, so that the functionality of the BOSE soundsystem is not lost!

BOSE sound system diagnosis

Diagnosis of the BOSE sound system is alsoperformed using the address word 47 in theVAS tester.A basic setting is not required.The available actuator tests can be performed eitherselectively or sequentially.

The AudioPilot microphone, which is integrated intothe BOSE sound system, can be used to absorbthe acoustic pressure produced during the

1 High-pitch loudspea2 Middle-pitch loudsp3 Low-pitch loudspea4 High-pitch loudspea5 Mid/low-pitch louds6 Control unit for digi7 Mid-range/treble lou8 Microphone unit in 9 Loudspeaker in parc10 High-pitch loudspea11 Middle-pitch loudsp12 Low-pitch loudspeak

13 High-pitch loudspea14 Mid/low-pitch louds

5

4

3

1

2

6


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Measured-value block Designat ion

01 General: Battery positive voltage

02 MOST: MOST address, FOT temperature


04 System: Analogue/digital unit temperatures in am

05 Microphone: Microphone voltage(s) for AudioPifor voice operating system

50 Control unit identification: Manufacturer code


No. Brief description and designationof the component to be tested

1 R21 Low-pitch loudspeaker, front left

2 R23 Low-pitch loudspeaker, front right

3 R20 High-pitch loudspeaker, front left

4 R22 High-pitch loudspeaker, front right

5 R14 High-pitch loudspeaker, rear left

6 R16 High-pitch loudspeaker, rear right

7 R103 Middle-pitch loudspeaker, front left

Available actuator tests

Available telephone systems

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Two different telephone systems are availableex-works for the new Audi A6 05.Firstly, there is the fixed system with Bluetoothoperator handset, with which you may be familiarfrom the current Audi A8 03, but which can only beordered with the High version of the MMI.

Secondly, there is the nebaseplate. This mobile bcontrol unit architecturesystem used in the AudiHowever, it has now beeMOST bus for Infotainm

Reference

For information on the telephone system,please refer to the SSP 293,Audi A8 03 Infotainment

11

10

2

12

4

1

5

3

6


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The telephone transmitteas standard with a BluetIn principle, the Blueto

is always available, evennot connected. For reasocompatibility, Bluetoothwhen the mobile phone holder. The phonebook sSIM card is read into the

transmitter and receiver phone is inserted. Mobilcannot be read in becausfrom model to model.

The mobile baseplate is operated via the MMI in the"TEL" menu. The telephone holder R126, which isrequired for whichever type of mobile phone is to beused, is available from the Parts Service. As you mayalready know from the introduction of the newmobile baseplate in other model series (Audi A3, A4,TT), this mobile phone holder no longer has aconnection cable. It is connected to the telephonetransmitter and receiver R36 via a contact panel.

Voice operation

The new mobile baseplate can be voice-operatedusing the operating unit in the steering wheel E221.The handsfree volume can also be set using themulti-function steering wheel and names ortelephone numbers can be dialled in thephonebook. The operating unit in the steering

wheel E221 passes the data signals for this on to thesteering column electrics J527 as LIN signals.This control unit converts the data into CANmessages and transfers these messages to the databus diagnosis interface J533 on CAN Convenience.Here, the digital data messages are converted intoMOST data records and are passed to the telephonetransmitter and receiver R36 via the MOST ring.The adapter set always includes a Push-to-talk

button (PTT), which enables voice operation evenwithout the multi-function steering wheel option.This button is included on every available mobilephone adapter.

Th PTT b h diff f i li i

Handsfree operation

The telephone transmitter and receiver R36 sends

Echo and noise com

The telephone transmitte

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the signals for handsfree operation (Voice, PhoneMute, etc.) via the MOST Infotainment bus to therelevant sound system, which is either integratedinto the control unit for front information J533 orthe independent digital sound system controlunit J525. Here, the digital data is converted intoanalogue data and is output on the loudspeaker.

as standard with a DSP-system. If the optional valso ordered, the echo anfunction of the control uused. Among other thingimproved handsfree qua

Microphone, frontleft R140

Control unit forinformation J523

Telephonetransmitter andfor telephoneR36

Microphone unit infront roof moduleR164

Telephonetransmitter andreceiver R36

Mobile baseplate diagnosis

The mobile baseplate is diagnosed as standard


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using the address word 77 in the VAS tester.A selective or sequential actuator test can beperformed to check the output of the audio signal tothe relevant sound system, radio mute operation,and whether or not a switched-on phone wasdetected.

Measured-value blocks

Measured-value block Designat ion

01 General: Battery positive voltage

02 MOST: MOST address, FOT temperature


05 Input signals: PTT, Mobile inserted, Mobile switc

10 Reception field strength of the mobile phone

11 Status of external antenna for mobile baseplate

14 Currently connected Bluetooth devices

19 Microphone: Microphone voltage, microphone p

20 Number of bonded (known) Bluetooth devices

48 Cut-off level of control unit for power manageme

80 Control unit identification: Manufacturer codes


130 Status of Bluetooth antenna

Actuator test

The actuator tests listed in the table can be called

i th id d f lt fi di f ti i th

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up using the guided fault-finding function in thediagnosis tester. Most of these can be activatedselectively (individually).

Possible actuator tests

Adaptation channel Designation

128 Basic audio volume

129 Mobile after-run time, from 30 seconds to 30 minutes in seven in

130 Reference channel wait time for synchronisation with audio com

131 Microphone-sensitivity

133 Bluetooth on/off

134 Bluetooth: Handsfree operation only with mobile phone inserted

Mobile baseplate adaptation

No. Designation

Se

1 "Phone on" signal X

2 Audio lead adapter set

3 Communication lead to adapter set


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Notes


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SSP 323 Audi A6 05

Self-study programmes for the Audi A6 05


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SSP 324 Audi A6 05 Chassis

Front axle technology Rear axle technology Steering system ESP Electromechanical parking brake EPB

Order No.: A04.5S00.07.00

SSP 323 Audi A6 05

Introduction to the vehicle Body technology Passenger protection Air conditioning

Order No.: A04.5S00.06.00

SSP 325 Audi A6 05 Engines and Gears

3.0 V6 TDI Common Rail 3.2 V6 FSI

Manual gearbox 01X, 02X, 0A3 6-stage automatic transmission 09L Multitronic 01J

Order No.: A04.5S00.08.00

32

323_058

3 2 6

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Audi a 6 Training

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