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Audi A8 2009 — Infotainment data bus (Most-Ring), for models with Mmi generation 3 only (Most) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A8 2009 - Infotainment data bus (Most-Ring)

J525	Digital sound package control unit
J533	Data bus diagnostic interface
J794	Control unit for information electronics 1
R	Radio
R7	DVD player
R41	CD changer
R78	TV tuner
#	equipment that is not present is bridged

AUDI A8 2009 Control units overview

Control units overview

1 -	Anti-theft and tilt system control unit -J529-

q	Location → page 805/4

2 -	Rear right door control unit -J389-

q	Location → page 805/4

q	Connector assigment → page 805/5

2 -	Power latching control unit for rear right door -J763-

q	Connector assigment → page 805/6

3 -	Rear seat adjustment with memory control unit -J522-, heated rear left seat control unit -J215-, heated rear right seat control unit -J216-

q	Under rear seat bench, central

q	Location → page 805/7

4 -	Energy management control unit -J644-, convenience system central control unit -J393-

q	on right in luggage compartment

q	Location → page 805/7

q	Connector assigment -J393- → page 805/9

q	Connector assigment -J644- → page 805/8

Audi A8	Fitting Locations	No. 805 / 2

5 -	Heated windscreen control unit -J505-, electric park and handbrake control unit -J540-, trailer detector control unit -J345-

q	Under the battery

q	Location → page 805/10

q	Connector assigment -J345- → page 805/11

q	Connector assigment -J505- → page 805/12

q	Connector assigment -J540- → page 805/13

6 -	Aerial selection control unit -J515-

q	Behind the roof end trim, rear left

q	Location → page 805/14

7 -	Digital sound package control unit -J525-

q	on left in luggage compartment

q	Location → page 805/14

7 -	TV tuner -R78-

q	on left in luggage compartment

q	Location → page 805/14

Audi A8	Fitting Locations	No. 805 / 3

7 -	Navigation system with CD drive control unit -J401-

q	on left in luggage compartment

q	Location → page 805/14

7 -	Parking aid control unit -J446-

q	on left in luggage compartment

q	Location → page 805/14

q	Connector assigment → page 805/15

7 -	Radio -R- and speech input control unit -J507-

q	on left in luggage compartment

q	Location → page 805/14

7 -	Digital radio -R147-

q	on left in luggage compartment

q	Location → page 805/14

8 -	Radio controlled clock receiver -J489-

q	Location → page 805/16

9 -	Tyre pressure monitor control unit -J502-

q	Location → page 805/16

q	Connector assigment → page 805/17

10 -	Rear left door control unit -J388-

q	Location → page 805/4

q	Connector assigment → page 805/5

10 -	Power latching control unit for rear left door -J762-

q	Connector assigment → page 805/6

Audi A8	Fitting Locations	No. 805 / 4

Anti-theft and tilt system control unit -J529-

Location:

Under rear seat bench, right

Rear right door control unit -J389- and rear left door control unit -J388-

Location -J389-:

In rear right door -arrow-

Location -J388-:

In rear left door -arrow-

Audi A8	Fitting Locations	No. 805 / 5

Connector assigment:

Connector front door:

A -	32-pin connector (connector A), white

B -	16-pin connector (connector B), brown

C -	12-pin connector (connector C), black

D -	10-pin connector, black (connector D), black

Connector rear door:

A -

Vacant

B -	16-pin connector (connector A), brown

C -	12-pin connector (connector B), black

D -	10-pin connector (connector C), black

Audi A8	Fitting Locations	No. 805 / 6

Power latching control unit for rear right door -J763- and power latching control unit for rear left door -J762-

Connector assigment:

-	6-pin connector, black

Audi A8	Fitting Locations	No. 805 / 7

Rear seat adjustment with memory control unit -J522-, heated rear left seat control unit -J215- and heated rear right seat control unit -J216-

Location:

Under rear seat bench, central

1 -	Rear seat adjustment with memory control unit -J522-

2 -	Heated rear left seat control unit -J215-

-	Heated rear right seat control unit -J216-

Energy management control unit -J644- and convenience system central control unit -J393-

Location:

on right in luggage compartment

2 -	Energy management control unit -J644-

6 -	Convenience system central control unit -J393-

Audi A8	Fitting Locations	No. 805 / 8

Connector assigment of energy management control unit -J644-:

A -	14-pin connector, black

Audi A8	Fitting Locations	No. 805 / 9

Connector assigment of convenience system central control unit -J393-:

A -	15-pin connector -connector A-, black

B -	10-pin connector -connector C-, black

C -	32-pin connector -connector B-, grey

Audi A8	Fitting Locations	No. 805 / 10

Heated windscreen control unit -J505-, electric park and handbrake control unit -J540- and trailer detector control unit -J345-

Location:

Under the battery

1 -	Heated windscreen control unit -J505-

2 -	Electric park and handbrake control unit -J540-

3 -	Trailer detector control unit -J345-

Audi A8	Fitting Locations	No. 805 / 11

Connector assigment of trailer detector control unit -J345-:

A -	16-pin connector -T16f-, black

B -	12-pin connector -T12m-, red

Audi A8	Fitting Locations	No. 805 / 12

Connector assigment of heated windscreen control unit -J505-:

A -	4-pin connector, black

Audi A8	Fitting Locations	No. 805 / 13

Connector assigment of electric park and handbrake control unit -J540-:

A -	30-pin connector, black

Audi A8	Fitting Locations	No. 805 / 14

AUDI A8 2009 Aerial selection control unit -J515-

Aerial selection control unit -J515-

Location:

Behind the roof end trim, rear left -Item 3-

Digital sound package control unit -J525-, TV tuner -R78-, navigation system with CD drive control unit -J401-, parking aid control unit -J446-, radio -R-, speech input control unit -J507- and digital radio -R147-

AUDI A8 2009 Aerial selection control unit -J515-

Location:

In left luggage compartment

1 -	Digital sound package control unit -J525-

2 -	TV tuner -R78-

3 -	Navigation system with CD drive control unit -J401-

4 -	Parking aid control unit -J446-

5 -	Radio -R- and speech input control unit -J507-

6 -	Digital radio -R147-

Audi A8	Fitting Locations	No. 805 / 15

Connector assigment:

-	Parking aid control unit -J446-

Pin connector:

A -	16-pin connector, brown

B -	12-pin connector, brown

C -	12-pin connector, black

Audi A8	Fitting Locations	No. 805 / 16

Radio controlled clock receiver -J489-

Location:

In rear bumper -Item 2-

Tyre pressure monitor control unit -J502-

Location:

Under rear seat bench, left

Audi A8	Fitting Locations	No. 805 / 17

Connector assigment:

A -	32-pin connector, black

AUDI A8 2009 Control units overview

Control units overview

1 -	Front information display and operating unit control unit -J523-

q	Location → chapter

2 -	Display unit for front information display and operating unit control unit -J685-

q	Location → chapter

3 -	Steering column electronics control unit -J527-

q	Location → chapter

4 -	Front passenger side door control unit -J387-

q	Location → chapter

q	Connector assignment → chapter

4 -	Power latching control unit for front passenger door -J761-

q	Connector assignment → chapter

5 -	Onboard supply control unit 2 -J520-

q	Location → chapter

q	Connector assignment → chapter

6 -	Roof electronics control unit -J528-

q	In front roof module

q	Location → chapter

Audi A8	Fitting Locations	No. 804 / 2

7 -	Airbag control unit -J234-

q	Location → chapter

q	Connector assignment → chapter

8 -	Seat and steering column adjustment control unit with memory -J136-

q	Location → chapter

q	Connector assignment → chapter

9 -	Entry and start authorisation control unit -J518-

q	Location → chapter

q	Connector assignment → chapter

10 -	Driver door control unit -J386-

q	Location → chapter

q	Connector assignment → chapter

10 -	Power latching control unit for driver door -J760-

q	Connector assignment → chapter

11 -	Onboard power supply control unit -J519-

q	Location → chapter

q	Connector assignment → chapter

12 -	Headlight range control, control unit -J431-

q	Location → chapter

q	Connector assignment → chapter

13 -	ABS control unit -J104-

q	Connector assignment → chapter

Audi A8	Fitting Locations	No. 804 / 3

14 -	Control unit in dash panel insert -J285-

q	Connector assignment → chapter

15 -	Wiper motor control unit -J400-

q	Location → chapter

16 -	Automatic gearbox control unit -J217-

q	Connector assignment, 16-pin connector -T16c- → chapter

q	Connector assignment, 20-pin connector -T20e- → chapter

17 -	Data bus diagnostic interface -J533-

q	Behind the glove box

q	Location → chapter

17 -	Adaptive suspension control unit -J197-

q	Behind the glove box

q	Location → chapter

q	Connector assignment → chapter

18 -	Adaptive cruise control unit -J428-

q	Location → chapter

q	Connector assignment → chapter

19 -	Engine control unit -J623-, engine control unit 2 -J624-

q	Location → chapter

-	Garage door operation control unit -J530-

q	Location → chapter

Audi A8	Fitting Locations	No. 804 / 4

Front information display and operating unit control unit -J523-

Location:

Behind the glove box -Item 1-

1 -	Front information display and operating unit control unit -J523-

2 -	Data bus diagnostic interface -J533-

3 -	Adaptive suspension control unit -J197-

Display unit for front information display and operating unit control unit -J685-

Location:

In centre dash panel -Item 1-

Audi A8	Fitting Locations	No. 804 / 5

Steering column electronics control unit -J527-

Location:

Near steering column, behind steering wheel

Driver side door control unit -J386-, front passenger door control unit -J387-

Location -J386-:

In driver door -arrow-

Location -J387-:

In front passenger door -arrow-

Audi A8	Fitting Locations	No. 804 / 6

Connector assignment:

Pin connector front door:

A -	32-pin connector (connector A), white

B -	16-pin connector (connector B), brown

C -	12-pin connector (connector C), black

D -	10-pin connector, black (connector D), black

Pin connector rear door:

A -

Vacant

B -	16-pin connector (connector A), brown

C -	12-pin connector (connector B), black

D -	10-pin connector (connector C), black

Audi A8	Fitting Locations	No. 804 / 7

Power latching control unit for driver door -J760-, power latching control unit for front passenger door -J761-

6-pin connector, black

Audi A8	Fitting Locations	No. 804 / 8

AUDI A8 2009 Onboard supply control unit 2 -J520-

Onboard supply control unit 2 -J520-

Location:

Under carpet of the front passenger seat -arrow-

AUDI A8 2009 Onboard supply control unit 2 -J520-

Audi A8	Fitting Locations	No. 804 / 9

Connector assignment:

A -	40-pin connector, on control unit

B -	40-pin connector, black, on wiring harness

Audi A8	Fitting Locations	No. 804 / 10

Roof electronics control unit -J528-

Location:

The roof electronics control unit -J528- in front roof module contains:

1 -	Interior monitor send and receive module 1 -G303-

2 -	Garage door operating unit -E284-

3 -	Telematics operating unit -E264-

1, 4, 5 -

Microphone unit in front roof module -R164-

4 -	Interior monitor send and receive module 2 -G305-

Audi A8	Fitting Locations	No. 804 / 11

Airbag control unit -J234-

Location:

On the front centre tunnel -Item 1-

Audi A8	Fitting Locations	No. 804 / 12

Connector assignment:

-	Airbag control unit -J234-

Connector:

A -	84-pin connector, yellow

q	up to model year 2004

-	75-pin connector, yellow

q	up to model year 2005

Audi A8	Fitting Locations	No. 804 / 13

Seat and steering column adjustment control unit with memory -J136-

Location:

In lower driver seat -Item 2-, coupling station driver seat -Item 1-

Audi A8	Fitting Locations	No. 804 / 14

Connector assignment:

A -	12-pin connector -connector ST5-, black

B -	12-pin connector -connector ST4-, black

C -	32-pin connector -connector ST6-, blue

D -	32-pin connector -connector ST7-, green

Audi A8	Fitting Locations	No. 804 / 15

Entry and start authorisation control unit -J518-

Location left-hand drive:

Under carpet of the driver seat -arrow-

Location right-hand drive:

Under carpet of the front passenger seat -arrow-.

Audi A8	Fitting Locations	No. 804 / 16

Connector assignment:

A -	81-pin connector -connector A-, black

B -	6-pin connector -connector B-, black

Audi A8	Fitting Locations	No. 804 / 17

Onboard power supply control unit -J519-

Location:

Behind the shelf on the driver's side, on relay and fuse holder behind the dash panel, left -arrow-

Audi A8	Fitting Locations	No. 804 / 18

Connector assignment:

A -	32-pin connector, -T32a- (connector C), grey

B -	23-pin connector -T23- (connector B), black

C -	10-pin connector, -T10p- (connector A), black

Audi A8	Fitting Locations	No. 804 / 19

Headlight range control, control unit -J431-

Location:

Behind dash panel insert

Audi A8	Fitting Locations	No. 804 / 20

Connector assignment:

A -	26-pin connector, yellow

Audi A8	Fitting Locations	No. 804 / 21

ABS control unit -J104-

Connector assignment:

A -	42-pin connector, black

Audi A8	Fitting Locations	No. 804 / 22

Control unit in dash panel insert -J285-

Connector assignment:

A -	32 pin connector -T32-, blue

Audi A8	Fitting Locations	No. 804 / 23

Wiper motor control unit -J400-

Location:

In plenum chamber on windscreen wiper motor -arrow-

Audi A8	Fitting Locations	No. 804 / 24

Automatic gearbox control unit -J217-, gearbox 09E/09L

Connector assignment:

A -	16-pin connector -T16c-, black

Audi A8	Fitting Locations	No. 804 / 25

Automatic gearbox control unit -J217-, gearbox 01J/01T

Connector assignment:

A -	20-pin connector -T20e-, black

Audi A8	Fitting Locations	No. 804 / 26

Data bus diagnostic interface -J533-

Location:

Behind the glove box -Item 2-

1 -	Front information display and operating unit control unit -J523-

2 -	Data bus diagnostic interface -J533-

3 -	Adaptive suspension control unit -J197-

Adaptive suspension control unit -J197-

Location:

Behind the glove box -Item 3-

1 -	Front information display and operating unit control unit -J523-

2 -	Data bus diagnostic interface -J533-

3 -	Adaptive suspension control unit -J197-

Audi A8	Fitting Locations	No. 804 / 27

Connector assignment:

A -	81-pin connector (connector A), black

B -	40-pin connector (connector B), black

Audi A8	Fitting Locations	No. 804 / 28

AUDI A8 2009 Engine control unit -J623-, engine control unit 2 -J624-

Engine control unit -J623-, engine control unit 2 -J624-

Location:

Engine control unit -1- with electronics box -2- in plenum chamber

Engine control unit2 -J624-, installed under or next to engine control unit -J623-, depending on equipment

Adaptive cruise control unit -J428-

AUDI A8 2009 Engine control unit -J623-, engine control unit 2 -J624-

Location:

Behind the front bumper, lower

Audi A8	Fitting Locations	No. 804 / 29

Connector assignment:

A -	12-pin connector, black

Audi A8	Fitting Locations	No. 804 / 30

Garage door operation control unit -J530-

Location:

Behind the front bumper, left

1 -	4-pin connector, black -T4bi-

2 -	Garage door operation control unit -J530-

3 -

Screw

AUDI A8 2009 – Infotainment data bus (Most-Ring), for models with MMI generation 3 only (MOST) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A8 2009 - Infotainment data bus (Most-Ring)

AUDI A8 2009 Control units overview

AUDI A8 2009 Aerial selection control unit -J515-

AUDI A8 2009 Control units overview

AUDI A8 2009 Onboard supply control unit 2 -J520-

AUDI A8 2009 Engine control unit -J623-, engine control unit 2 -J624-

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