Current Flow Diagram

Edition 05.01

Main fuse

A97–0220

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

5A – 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. 40/1

Multi-function steering wheel

From model year 2001

1

2

3

4

5

6

7

8

9

10

11

12

97–53351

13

14

T16a/1

8/86s

D

3/30

7/30

0 1

0 1 2 3

2/75

6/15

A

21

A

2

A

32

0,5

ro

2,5

ro

2,5

ro

135

A

57

0,22

ro

0,5

bl/ge

4,0
sw

0,5
sw

T16a/14

T16a/13

1,0

br

S

13

10A

13

12

501

2,5

ro

1,0

ro/ge

13a

T16a/2

T16a/12

6,0

ro

6,0

ro

J

527

J

285

T32/17

0,35

or/gn

T16a/9

T32/18

T16a/8

0,35

or/gn

0,35
or/br

0,35
or/br

A

146

A

147

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 05.01

or = orange

Audi A4

No. 40/2

Ignition/starter switch, control unit with display in
dash panel insert, steering column electronics
control unit, fuse

D

– Ignition/starter switch

J285 – Control unit with display in dash panel insert
J527 – Steering column electronics control unit
S13 – Fuse in fuse box/relay plate
T16a – 16-pin connector, black, on steering column

electronics control unit

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

135 – Earth connection -2-, in dash panel wiring

harness

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

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

A57 – Positive (+) connection -3- (30), 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

15

16

17

18

19

20

21

22

23

24

25

26

97–53352

27

28

221

E

+

–

T

R

T

J

527

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. 40/3

Operating unit in steering wheel, steering column
electronics control unit

E221 – Operating unit in steering wheel
J527 – Steering column electronics control unit

29

30

31

32

33

34

35

36

37

38

39

40

97–54009

41

42

189

G

34

234

J

J

527

33

T4e/1

95

N

H

36

Z

221

E

T4e/2

F

138

0,,5

ge

0,5
ws

*

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. 40/4

Operating unit in steering wheel, steering column
electronics control unit

E221 – Operating unit in steering wheel
F138 – Airbag coil connector, return spring with slip

ring

G189 – Overheating sensor
H

– Horn plate

J234 – Airbag control unit
J527 – Steering column electronics control unit
N95 – Airbag igniter, driver’s side
T4e – 4-pin connector, yellow, connector point:

module carrier in vehicle interior

Z36 – Heated steering wheel

*

– Operated via convenience CAN bus by heated

driver’s seat adjuster in control and display unit
for air conditioner/Climatronic