Current Flow Diagram

Edition 08.02

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

Audi A4

No. 7/1

Radio navigation system (RNS-D)

From September 2002

Fuse box

♦

Dash panel, driver’s side

Fuse colours

30 A - green

25 A - white

20 A - yellow

15 A - blue

10 A - red

7.5 A - brown

5 A - beige

Note:

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

Current Flow Diagram

Edition 08.02

A97–0248

5

6

7

1

2

3

4

A97–0247

8

11

12

13

14

2

3

4

5

6

7

10

9

16

15

17

A

B

1

Audi A4

No. 7/2

Connector point with screw connection

♦

In electronics box, plenum chamber

3 - 17-pin connector, red (T17d)

Connector point, A pillar

♦

On left-hand side, bottom, behind side trim

15 - 17-pin connector, green (T17b)

17 - 17-pin connector, black (T17)

Current Flow Diagram

Edition 08.02

A97–0245

1

2

3

4

C

B

G

E

F

A

D

H

A97–0399

8

9

7

A

1

B

2

3

4

5

6

C

D

E

F

G

Audi A4

No. 7/3

4-point relay carrier with screw connection

♦

Dash panel, driver’s side

9-point relay carrier with onboard power supply control unit

♦

Dash panel, driver’s side, behind 3-point relay carrier

6 - X contact relief relay

1

2

3

4

5

6

7

8

9

10

11

12

13

14

97–54011

T8/7

2,5

ro/bl

T8/8

1,5

br

610

A

46

2,5

br

610

0,5

ro/bl

117

**

0,5

sw

501

A

32

A

2

2,5

ro

4,0

sw

2,5

ro

T26/4

6,0

ro

6,0

ro

T8/5

2,5

ro/bl

0,35
ro/bl

140

8/86s

3/30

7/30

6/15

0 1

0,5

ro

0,5

ro

T8/4

D

J

402

A

21

2,5

ro/bl

64

39a

39

239

20A

S

2,5

ro/bl

2,5

ro/bl

48

*

12

A

57

6,0

ro

346

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/4

Voltage supply

D

– Ignition/starter switch

J402 – Operating electronics control unit, navigation
S239 – Fuse in fuse box
T8

– 8-pin connector, black, radio connector III

T26 – 26-pin connector, black, on operating

electronics control unit, navigation

346 – Earth connection (audio), in dash panel wiring

harness

501 – Screw connection -2- (30), on relay plate

610 – Earth point (audio), below centre console, front

A2

– Positive (+) connection (15), in dash panel

wiring harness

A21 – Connection (86s), in dash panel wiring harness

A32 – Positive (+) connection (30), in dash panel

wiring harness

A46 – Positive (+) connection (30 - from radio), in

dash panel wiring harness

A57 – Positive (+) connection -3- (30), in dash panel

wiring harness

✱

– Models with active loudspeakers

✱✱

– Models with Bose loudspeakers

15

16

17

18

19

20

21

22

23

24

25

26

97–53409

27

28

402

J

T26/5

0,35

bl/ws

T

17/13

0,35

bl/ws

0,35

sw

T26/17

0,35
bl/ro

T

17d/15

1,0

bl/ro

1,0

bl/ro

J

104

F

4

A

127

A

87

34

2

T20d/7

T20d/12

V

50

V

49

0,35

sw

0,35

gn

T8/2

0,35

gr

A

129

0,35

sw

0,35

gn

0,5

gr

*

*

*

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/5

Operating electronics control unit, navigation

F4

– Reversing light switch

J104 – ABS with EDL control unit
J402 – Operating electronics control unit, navigation
T8

– 8-pin connector, black, radio connector III

T17 – 17-pin connector, black, connector point, A

pillar, left

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

electronics box, plenum chamber

T20d – 20-pin connector, black, radio connector I
T26 – 26-pin connector, black, on operating

electronics control unit, navigation

A87 – Connection (RF (reversing light)), in dash panel

wiring harness

A127

– Connection (rear left speed sensor), in dash

panel wiring harness

A129

– Connection (muting), in dash panel wiring

harness

V49 – Connection (low frequency, NF +), in

communication wiring harness

V50 – Connection (low frequency, NF -), in

communication wiring harness

✱

– See applicable Current Flow Diagram:

Telephone

29

30

31

32

33

34

35

36

37

38

39

40

41

42

97–53410

402

J

R

21

1,5

bl/ge

1,5

br/gn

1,5

gn/bl

1,5

br/bl

1–

2+

1–

2+

T

20a

/2

T

20a

/12

1,5

bl/ge

1,5

br/gn

1,5

gn/bl

1,5

br/bl

0,35

bl/ws

0,35

br/ws

2

1

2

1

2

1

2

1

0,35

bl/ws

0,35

br/ws

T8a/6

R

26

R

R

23

R

R

27

R

T8a/5

T8a/4

T8a/3

2

1

R

70

T

20

/2

T

20

/12

0,5

br/gn

0,5

gn/bl

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/6

Active loudspeakers, front

J402 – Operating electronics control unit, navigation
R21 – Bass loudspeaker, front left
R23 – Bass loudspeaker, front right
R26 – Middle-high tone loudspeaker, front left
R27 – Middle-high tone loudspeaker, front right
R70 – Internal loudspeaker (centre loudspeaker)
T8a – 8-pin connector, brown, radio connector II
T20 – 20-pin connector, black, door, A pillar, left
T20a – 20-pin connector, black, door, A pillar, right

43

44

45

46

47

48

49

50

51

52

53

54

55

56

97–55521

402

J

T20d/1

2,5

br

0,35

ws

0,5
ws

0,35

gn

2,5

ro/bl

5

R

12

T20d/2

T20d/3

T20d/6

1

3

2

9

23

22

R

15

1,0

ro/ge

1,0

br/ge

1,0

ro/gn

1,0

br/sw

1–

2+

1–

2+

T

20b

/2

T

20b

/12

1,5

ro/ge

1,5

br/ge

1,5

ro/ge

0,35

bl/ws

0,35

br/ws

2

1

2

1

2

1

2

1

0,35

bl/ws

0,35

br/ws

R

34

R

R

17

R

R

35

R

T

20c

/2

T

20c

/12

17

18

20

21

15

14

1,0

ro/gr

1,0

br/gr

R

100

0,35

br

0,35

br

2/+

1/–

1,5

br/ge

346

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/7

Active loudspeakers, rear

J402 – Operating electronics control unit, navigation
R12 – Amplifier
R15 – Bass loudspeaker, rear left
R17 – Bass loudspeaker, rear right
R34 – Middle-treble tone loudspeaker, rear left
R35 – Middle-treble tone loudspeaker, rear right
R100 – Bass loudspeaker
T20b – 20-pin connector, black, door, B pillar, left
T20c – 20-pin connector, black, door, B pillar, right
T20d – 20-pin connector, black, radio connector I

346 – Earth connection (audio), in dash panel wiring

harness

57

58

59

60

61

62

63

64

65

66

67

68

69

70

97–55522

402

J

R

21

R

23

R

26

R

27

1,5

bl/ge

1,5

br/gn

T

20/2

1,5

gn/bl

1,5

br/bl

T20d/1

0,35

gr

0,35

ge

0,5
ws

0,35

br

0,35

ws

0,35

gn

18

19

1–

2+

1–

2+

R

12

2,5

br

0,22

br

2,5

ro/bl

6

7

11

6

8

10

9

17

16

25

13

0,35

133

T20d/2 T20d/3 T20d/4 T20d/5 T20d/6

T

20/12

T

20a

/2

T

20a

/12

1,5

bl/ge

1,5

br/gn

1,5

gn/bl

1,5

br/bl

0,35

bl/ws

0,35

br/ws

2

1

2

1

2

1

2

1

0,35

bl/ws

0,35

br/ws

1,0

gn

R

70

1

2

1,0
sw

346

346

–

+

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/8

Bose loudspeakers, front

J402 – Operating electronics control unit, navigation
R12 – Amplifier
R21 – Bass loudspeaker, front left
R23 – Bass loudspeaker, front right
R26 – Middle-high tone loudspeaker, front left
R27 – Middle-high tone loudspeaker, front right
R70 – Internal loudspeaker (centre loudspeaker)
T20 – 20-pin connector, black, door, A pillar, left
T20a – 20-pin connector, black, door, A pillar, right
T20d – 20-pin connector, black, radio connector I

133 – Earth connection, in loudspeaker wiring

harness

346 – Earth connection (audio), in dash panel wiring

harness

71

72

73

74

75

76

77

78

79

80

81

82

83

84

97–53413

2,5

ro/gr

2,5

br/gr

1–

2+

15

14

R

100

R

12

R

15

1,5

ro/ge

1,5

br/ge

1,5

ro/gn

1,5

br/sw

1–

2+

1–

2+

T

20b

/2

T

20b

/12

1,5

ro/ge

1,5

br/ge

0,35

bl/ws

0,35

br/ws

2

1

2

1

2

1

2

1

0,35

bl/ws

0,35

br/ws

R

34

R

R

17

R

R

35

R

T

20c

/2

T

20c

/12

20

21

22

23

1,5

br/sw

402

J

1,5

ro/gn

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/9

Bose loudspeakers, rear

J402 – Operating electronics control unit, navigation
R12 – Amplifier
R15 – Bass loudspeaker, rear left
R17 – Bass loudspeaker, rear right
R34 – Middle-treble tone loudspeaker, rear left
R35 – Middle-treble tone loudspeaker, rear right
R100 – Bass loudspeaker
T20b – 20-pin connector, black, door, B pillar, left
T20c – 20-pin connector, black, door, B pillar, right

85

86

87

88

89

90

91

92

93

94

95

96

97

98

97–55524

402

J

7

0,5

ro

NF–R

10

0,5
ws

NF–L

NF–31

9

3

8

0,5

ge

gesch.
Plus

2

0,5
sw

Clock

6

0,5

bl

Dauer–
plus

4

0,5

or

CD–Bus
Data out

T12k
/6

1

0,5

rosa

R

41

T12k
/11

T12k
/12

T16j
/16

T12k
/10

T12k
/2

T12k
/8

T12k
/9

CD–Bus
Data in

0,5

br

0,22

br/sw

0,22

br/sw

309

310

0,35

br

V

14

346

T12k/4

0,5

sw/ge

4,0

sw/ge

2

J

59

A

34

6

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/10

CD changer

J59 – X contact relief relay
J402 – Operating electronics control unit, navigation
R41 – CD changer
T12k – 12-pin connector, blue, on operating electronics

control unit, navigation, connector B

T16j – 16-pin connector, black, on operating

electronics control unit, navigation, connector D

309 – Earth connection -1-, screening, in CD changer

wiring harness

310 – Earth connection -2-, screening, in CD changer

wiring harness

346 – Earth connection (audio), in dash panel wiring

harness

A34 – Connection (75x), in dash panel wiring harness

V14 – Connection (screening), in CD changer wiring

harness

99

100

101

102

103

104

105

106

107

108

109

110

97–53415

111

112

415

J

0,35

br

0,35

ws

0,35

sw

NF–Masse NF–L

Videomasse

NF–R

R in

G in

B in

Video Sync.

Schirmmasse

T11/1

T11/2

T11/3

T11/5

T11/4

T11/11

T54/8

T54/7

T54/5

T54/10 T54/11 T54/9

0,5

br/ws

0,5

sw/bl

0,5

br/gr

0,5

br/sw

0,5

li

0,35

br/ge

0,35

br/ge

0,35

br/ro

0,35

ro

0,35

gn

0,35

bl

T11/10

T11/9

T11/8

T54/16 T54/17 T54/14 T54/15 T54/12 T54/13

402

J

0,35

br/li

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/11

Navigation operating electronics control unit,
navigation/TV tuner

J402 – Operating electronics control unit, navigation
J415 – Navigation/TV tuner
T11 – 11-pin connector, on navigation/TV tuner
T54 – 54-pin connector, black, on navigation/TV tuner

113

114

115

116

117

118

119

120

121

122

123

124

97–53416

125

126

11

R

HF

HF

HF

HF

br/2

HF

R1

B

ZF

T26/13

T54/3

0,35

gr/ro

0,35

gr/ro

0,35

gr/ro

T26/26

T54/2

0,35

gr/ws

0,35

gr/ws

0,35

gr/ws

116

114

402

J

HF

HF

116

120

114

120

8

0,5

ro/bl

0,5

br

346

TV1

TV2

TV3

TV4

R1

R1

9

8

T54/19

T54/20

415

J

94

R

0,35

gr/ro

0,35

gr/ws

K

br/1

gn/2

gn/1

A

149

A

148

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/12

Navigation operating electronics control unit,
navigation/TV tuner, aerial, navigation interface

J402 – Operating electronics control unit, navigation
J415 – Navigation/TV tuner
R1

– Aerial connection

R11 – Aerial
R94 – Navigation interface
T26 – 26-pin connector, black, on operating

electronics control unit, navigation

T54 – 54-pin connector, black, on navigation/TV tuner

346 – Earth connection (audio), in dash panel wiring

harness

A148

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

panel wiring harness

A149

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

panel wiring harness

97–55525

A

179

T32/19

0,35
or/br

A

178

T32/20

0,35

or/li

A

159

T

16/15

0,35

gn/bl

T32a/17

0,5

gr/bl

6

2

3

T8/1

T8/6

T8/3

12

0,35

br

9

0,35
or/br

0,35

or/li

J

402

0,35
ro/bl

J

285

T54/21

0,35

gn/bl

J

415

A

27

A

175

94

R

0,5

ws/bl

0,35
gr/bl

0,35

gn/bl

346

33

0,35

ws/bl

J

104

0,35

ws/bl

T

17b

/17

127

128

129

130

131

132

133

134

135

136

137

138

139

140

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 08.02

or = orange

Audi A4

No. 7/13

Control unit with display in dash panel insert,
navigation operating electronics control unit,
navigation interface, CAN bus

J104 – ABS with EDL control unit
J285 – Control unit with display in dash panel insert
J402 – Operating electronics control unit, navigation
J415 – Navigation/TV tuner
R94 – Navigation interface
T8

– 8-pin connector, black, radio connector III

T16 – 16-pin connector, black, diagnostic connector
T17b – 17-pin connector, green, connector point, A

pillar, left

T32 – 32-pin connector, blue, on dash panel insert
T32a – 32-pin connector, green, on dash panel insert
T54 – 54-pin connector, black, on navigation/TV tuner

346 – Earth connection (audio), in dash panel wiring

harness

A27 – Connection (speed signal), in dash panel wiring

harness

A159

– Connection (L), in dash panel wiring harness

A175

– Connection (58s), 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