Current Flow Diagram

Edition 07.01

Fuse box

A97–0242

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

3

4

1

2

44

43

42

41

40

37

39

38

36

35

34

33

32

31

30

29

28

27

26

25

24

Res

Res

Res

Res

Res

15 A
10 A

25 A
20 A

30 A

Fuse colours

–
–

–
–

–

green
white

blue
red

yellow

– orange

5 A – beige

7.5A

From fuse number 23 upwards the fuses in the
fuse box are designated as 223 etc. in the
Current Flow Diagram.

Audi A4

No. 61/1

CAN bus wires

From model year 2002

1

2

3

4

5

6

7

8

9

10

11

12

13

14

97–53984

A

121

0,35

or/sw

J...

T

17d/14

0,35

or/sw

J

*

**

0,35

or/sw

*

**

86

10

217

A

122

0,35
or/br

J

11
85

*

**

*

**

217

a

b

J...

0,35

or/sw

D

160

D

159

0,35
or/br

T

17d/13

0,35
or/br

0,35
or/br

66

T

17/6

J

104

0,35

or/sw

0,35

or/sw

0,35
or/br

64

T

17/5

0,35
or/br

J

104

*

**

*

**

3

J

234

0,35

or/sw

2

0,35
or/br

J

234

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/2

CAN bus wires (drive train)

J...

– Engine control units

J104 – ABS with EDL control unit
J217 – Automatic gearbox control unit
J234 – Airbag control unit
T17 – 17-pin connector, black, connector point, A

pillar, left

T17d – 17-pin connector, red, connector point,

electronics box, plenum chamber

A121

– Connection (high bus), in dash panel wiring

harness

A122

– Connection (low bus), in dash panel wiring

harness

D159

– Connection (high bus), in engine compartment

wiring harness

D160

– Connection (low bus), in engine compartment

wiring harness

✱

– Only models with automatic gearbox

(multitronic)

✱✱

– Only models with five-speed automatic

gearbox (AG5)

15

16

17

18

19

20

21

22

23

24

25

26

27

28

97–53985

A

121

T16a/10

0,35
or/br

A

122

T16a/11

A

179

A

178

a

b

c

d

T32a
/13

T32a
/12

0,35
or/br

T16a/8

0,35
or/br

T16a/9

A

147

A

146

e

f

T32
/18

0,35
or/br

T32
/17

0,35

or/gn

T32
/19

0,35
or/br

T32
/20

0,35

or/li

J

527

J

285

0,35

or/sw

0,35

or/gn

0,35

or/sw

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/3

CAN bus wires, control unit with display in dash
panel insert

J285 – Control unit with display in dash panel insert
J527 – Steering column electronics control unit
T16a – 16-pin connector, black, on steering column

electronics control unit

T32 – 32-pin connector, blue, on dash panel insert
T32a – 32-pin connector, green, on dash panel insert

A121

– Connection (high bus), in dash panel wiring

harness

A122

– Connection (low bus), in dash panel wiring

harness

A146

– Connection (convenience CAN bus, high), in

dash panel wiring harness

A147

– Connection (convenience CAN bus, low), in

dash panel wiring harness

A178

– Connection (infotainment CAN bus, high), in

dash panel wiring harness

A179

– Connection (infotainment CAN bus, low), in

dash panel wiring harness

29

30

31

32

33

34

35

36

37

38

39

40

41

42

97–53986

A

147

A

146

e

f

J

T32b
/13

J

T32b
/12

0,35
or/br

519

519

c

d

J

T16f
/14

J

T16f
/7

0,35
or/br

446

446

J

5/13

J

5/12

0,35
or/br

393

393

E

C/11

E

C/12

0,35
or/br

87

87

c

d

0,35

or/gn

0,35

or/gn

0,35

or/gn

0,35

or/gn

J

0,35
or/br

...

0,35

or/gn

J

...

J

8

J

7

0,35
or/br

364

364

0,35

or/gn

0,35
or/br

0,35

or/gn

T

10k

/3

T

10k

/2

A

179

A

178

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/4

CAN bus wires (convenience features)

E87 – Control and display unit for air

conditioner/Climatronic

J...

– Door control units

J364 – Additional heater control unit
J393 – Convenience system central control unit
J446 – Parking aid control unit
J519 – Vehicle voltage control unit
T10k – 10-pin connector, white, connector point, A

pillar, left

T16f – 16-pin connector, brown, on parking aid control

unit

T32b – 32-pin connector, grey, on vehicle voltage

control unit

A146

– Connection (convenience CAN bus, high), in

dash panel wiring harness

A147

– Connection (convenience CAN bus, low), in

dash panel wiring harness

A178

– Connection (infotainment CAN bus, high), in

dash panel wiring harness

A179

– Connection (infotainment CAN bus, low), in

dash panel wiring harness

43

44

45

46

47

48

49

50

51

52

53

54

55

56

97–53987

A

149

A

148

J

3

0,35
gr/ro

J

2

0,35

gr/ws

415

415

c

d

J

T26
/13

J

T26
/26

0,35

gr/ws

402

402

0,35

gr/ws

c

d

R

0,35
or/br

T12f
/9

T12f
/8

T12f
/3

T12f
/2

94

A

179

A

178

0,35
gr/ro

0,35
gr/ro

0,35

or/li

*

*

*

*

*

*

*

*

*

*

**

**

**

**

*

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/5

CAN bus wires (navigation and infotainment)

J402 – Operating electronics control unit, navigation
J415 – Navigation/TV tuner
R94 – Navigation interface
T12f – 12-pin connector, black, under rear seat bench
T26 – 26-pin connector, black, on operating

electronics control unit, navigation

A148

– Connection (navigation CAN bus, high), in dash

panel wiring harness

A149

– Connection (navigation CAN bus, low), in dash

panel wiring harness

A178

– Connection (infotainment CAN bus, high), in

dash panel wiring harness

A179

– Connection (infotainment CAN bus, low), in

dash panel wiring harness

✱

– Only models with radio navigation system

✱✱

– Only models with radio navigation system and

TV tuner

57

58

59

60

61

62

63

64

65

66

67

68

69

70

97–53988

A

179

J

T46
/38

J

T46
/39

0,35
or/br

526

526

c

d

J

T20e
/2

J

T20e
/5

0,35
or/br

401

401

J

9

J

30

0,35
or/br

526

526

c

d

0,35

or/li

0,35

or/li

J

9

J

8

0,35
or/br

507

507

*

*

*

*

3

4

0,35
or/br

0,35

or/li

T

12d/

/9

T

12d/

/10

R

99

0,35
or/br

0,35

or/li

0,35

or/li

A

178

0,35

or/li

*

*

*

*

*

*

*

*

* *

R

99

* *

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/6

CAN bus wires (infotainment)

J401 – Navigation system with CD drive control unit
J507 – Control unit for voice control
J526 – Telephone/telematics control unit
R99 – Chip card reader unit
T12d – 12-pin connector, brown, near glove box
T20e – 20-pin connector, black, navigation system with

CD drive control unit

T46 – 46-pin connector, black, on

telephone/telematics control unit

A178

– Connection (infotainment CAN bus, high), in

dash panel wiring harness

A179

– Connection (infotainment CAN bus, low), in

dash panel wiring harness

✱

– Only models with telephone/telematics (USA)

✱✱

– Optional equipment for models with navigation

system

71

72

73

74

75

76

77

78

79

80

81

82

83

84

97–53989

R

T20d/12

0,35
or/br

A

179

A

178

c

d

R

T20d/9

0,35
or/br

*

*

*

0,35

or/li

0,35

or/li

*

J

J

402

402

T20d/8

T20d/7

Current Flow Diagram

ws = white
sw = black

ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow

Edition 07.01

or = orange

Audi A4

No. 61/7

CAN bus wires (infotainment)

J402 – Operating electronics control unit, navigation
R

– Radio

T20d – 20-pin connector, black, radio connector I

A178

– Connection (infotainment CAN bus, high), in

dash panel wiring harness

A179

– Connection (infotainment CAN bus, low), in

dash panel wiring harness

✱

– Only models with radio navigation system

(Japan)