Current Flow Diagram

Edition 01.96

Fuse box:

15 A
10 A

25 A
20 A

30 A

Fuse colours

Position of relays:

–
–

–
–

–

green
white

blue
red

yellow

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

1

3

6

10

14

18

22

2

4

7

11

15

19

23

5

9

13

17

21

8

12

16

20

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

A97–0022

13-point relay carrier:

A97–0024

7

8

9

10

11

12

13

1

2

3

4

5

6

14

15

16

17

18

3

Magnetic coupling relay

Position of relays:

2

3

8-point relay carrier

19

21

Radiator fan relay - maximum speed

Radiator fan 1st stage relay

Radiator fan fuse

Radiator fan fuse - relay coil

1

A97–0026

8

7

6

5

4

3

2

14

24

15

16

17

13 12

11 10

9

23

22

21

19 18

20

Audi A4

No. 19

Air conditioner with automatic control

From November 1994

T

4c/4

15

30

x

15

30

31

x

31

1

2

3

4

5

6

30

4,0

ro

S

40A

1

2

42

19

J

26

3

2/30

4/86

8/87

6/85

2,5

ro/bl

0,5

br/gn

39

N

2,5

ro/ws

97–17111

11

F

18

0,5

br/gn

0,5

ro/gn

0,5

br

M

7

7

8

9

4,0

br

V

+

–

127

4,0

ro/sw

F

54

3/31

J

2

101

1/30

3/86

2/87

4/85

4,0

ro/ws

S

5A

1

2

51

75x

0,5

sw/ge

21

0,5

sw/ro

0,5

sw/ro

4,0

ro/bl

F

23

F

118

2

4

1

3

0,5

ro/gn

*

0,5

ro/gn

T

4c/1

127

0,5

br

T

4c/2

0,5

br

0,5

br/ws

0,5

br/ws

T

4c/3

0,5

br/bl

T

10p/6

0,5

br/bl

127

1/St.2

0,35
br/bl

2/St.1

a

35

44

127

4,0

br

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 01.96

Audi A4

No. 19/1

Air conditioner with automatic control

F18 – Radiator fan thermo-switch
F23 – High pressure switch for air conditioner
F54 – Radiator fan thermo-switch
F118 – High pressure switch for magnetic coupling
J26 – Radiator fan relay
J101 – Radiator fan 2nd speed relay
N39 – Radiator fan series resistor
S42 – Radiator fan single fuse
S51 – Radiator fan fuse - relay coil
T4c – 4-pin connector, red, in engine compartment,

front left

T10p – 10-pin connector, gray, left connector point, A

pillar

V7

– Radiator fan

44

– Earth point, lower part of left A pillar

127

– Earth connection -1-, in air conditioner

compressor wiring harness

*

– Models with 6 cylinder engine (engine codes

AAH)

1

3

2

J

126

2,5

br

2,5

br/gn

2,5

br/gn

M

+

–

V

2

1,5

gr

F

73

1

2

1

2

63

N

G

M

56

1

1

2

2

0,35

gn/sw

135

0,35

br/gn

0,35

sw/bl

2,5

sw/bl

1,5

sw/bl

1,5

sw/bl

A

69

0,5

sw/br

135

15

30

x

15

30

31

x

31

10

11

12

13

14

30

15

16

17

A

32

T26/4

0,35

bl/li

0,35
gr/bl

T26a
/19

0,35

gn/bl

0,35

gn/bl

A

19

0,35
gr/bl

T26/7

0,35

ws/bl

0,35

ws/bl

A

60

A11

C6

A5

C4

A

50

0,35
ro/bl

1,0

ro/bl

6,0

ro

D16

0,5

br/sw

T

4

0,5

br/gn

C2

0,35
br/bl

D14

135

D15

18

19

20

C16

C11

C14

D9

D6

39

97–17112

A4

0,35

br

A10

87

E

0,35

bl/sw

1,5

br

1,5

br

0,5

sw/bl

0,35

sw/bl

38

15a

S

10A

15

15

225a

S

30A

225

225

75x

10,0

sw/ge

4,0

sw/bl

A

65

6,0

ro

21

G

J

166

J

218

41

0,35

sw/bl

0,35

br/ws

A

45

T26/3

A

65

a

42

V

10p/2

C13

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 12.95

Audi A4

No. 19/2

Air conditioner with automatic control

E87 – Control and display unit for air conditioner
F73 – Low pressure switch for air conditioner
G21 – Speedometer
G56 – Dash panel temperature sensor
J126 – Fresh air blower control unit
J166 – Instrument illumination amplifier
J218 – Combi-processor in dash panel wiring harness
N63 – Fresh and recirculating air flap two-way valve
S15 – Fuse in fuse box
S225 – Fuse in fuse box
T10p – 10-pin connector, gray, left connector point, A

pillar

T26 – 26-pin connector, yellow, on dash panel insert
T26a – 26-pin connector, blue, on dash panel insert
V2

– Fresh air blower

V42 – Temperature sensor blower

A19

– Connection (58d), in dash panel wiring harness

A32

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

wiring harness

A45

– Connection (engine speed signal), in dash panel

wiring harness

A50

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

wiring harness

A60

– Connection (vehicle speed signal), in dash

panel wiring harness

A65

– Connection (75a, digital air conditioner), in dash

panel wiring harness

A69

– Connection (31, digital air conditioner/blower

control), in dash panel wiring harness

135

– Earth connection -2-, in dash panel wiring

harness

15

30

x

15

30

31

x

31

21

22

23

24

25

26

27

28

29

30

31

32

33

26

87

E

97–17113

D5

D13

B17

3

5

M

0,35

ws/gr

1/+

2/–

0,35

gr

0,35
ws/li

0,35

br/ws

V

71

113

G

0,35

ro/ge

24

C8

0,35

ro/ge

D2

D10

B8

0,35

ws/ge

0,35

ge

3

5

M

1/+

2/–

V

68

92

G

4

0,35

br/ws

M

0,35

br/ws

0,35

br/ws

B9

D12

D4

D3

D11

B10

A9

0,35

ge/ws

0,35

gr/ro

0,35
ws/li

0,35

ws/ro

0,35

gr/ge

0,35

ge/bl

0,35

br/ws

1/+

2/–

5

4

V

70

112

G

0,35

ro/ge

0,35

ro/ge

0,35

ro/ge

24

24

5

M

1/+

2/–

V

85

114

G

4

3

A

67

a67

0,35

br/ws

3

0,35

sw/gr

T

10/8

0,35

sw/gr

0,35

sw/gr

J

217

J

192

J

220

0,35

sw/gr

C10

C11

C12

4

A12

0,35

br/ws

*

**

0,35

gr/ws

A

73

0,35

br/ge

189

B1

0,35

br/ge

J

T20/5

A2

0,35

sw/ge

A

64

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 12.95

Audi A4

No. 19/3

Air conditioner with automatic control

E87 – Control and display unit for air conditioner
G92 – Control motor potentiometer, temperature flap
G112 – Control motor potentiometer, central flap
G113 – Control motor potentiometer, air flow flap
G114 – Control motor potentiometer, footwell/defroster

flap

J189 – Auto-check system
J192 – Multi-point injection control unit
J217 – Automatic gearbox control unit
J220 – Motronic control unit
T10 – 10-pin connector, brown, connector point,

electronics box, plenum chamber

T20 – 20-pin connector, black, on bulb monitoring

device

V68 – Temperature flap control motor
V70 – Central flap control motor
V71 – Air flow flap control motor
V85 – Footwell/defroster flap control motor

A64

– Connection (30, rpm boost), in dash panel

wiring harness

A67

– Connection (normal earth, digital air

conditioner), in dash panel wiring harness

A73

– Connection (ambient temperature display), in

dash panel wiring harness

*

– Models with 4 cylinder engine (engine codes

ADP, ADR)

**

– Models with 6 cylinder engine (engine codes

AAH)

15

30

x

15

30

31

x

31

34

35

36

37

38

39

40

41

42

43

87

E

a67

97–17114

44

C7

3a

S

5A

3

3

0,5

gr/gn

1,0

gr/gn

A

37

1,5

gr

1

E

T14/7/58

0,35

ws/gn

0,5

br/ge

0,35

br/ws

T

0,35

br/ws

T

T

2b/1

0,5

br/ws

0,5

br/ws

9

T

10p/3

C5

A8

T

10p/9

0,35

br/ge

107

3

2

2b/2

T

2c/2

G

G

T

2c/1

0,5

br/ws

111

A7

G

17

2

1

G

89

0,35

br/ws

2

1

G

110

0,35

br/ws

B7

0,35

ro/br

T

10/10

*

0,5

br/ws

10p/7

T

10m/1

J

44

4/86

2/30

8/87

6/85

3

C3

0,35

sw/ro

A

68

1,5

gr

16

0,35

gn/br

2,5

sw/ro

0,35

sw/bl

18

2,5

gn/ge

T

10p/1

2,5

gn/ge

*

2,5

gn/ge

**

2,5

gn/ge

**

T

1d

2,5

gn/ge

*

1,0

gn/ge

*

0,35

br/ws

19

25

N

J

201

A

67

B18

0,5

gr/gn

0,35

gr/gn

0,35

br/gn

D8

0,5

ro/br

A1

**

0,35

gn

T

K

16/7

0,35
gn/li

A

76

Current Flow Diagram

ws = white
sw = black

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

= purple

ge = yellow

Edition 11.94

Audi A4

No. 19/4

Air conditioner with automatic control

E1

– Lighting switch

E87 – Control and display unit for air conditioner
G17 – Ambient temperature sensor
G89 – Fresh air intake duct temperature sensor
G107 – Sunlight penetration photo sensor
G110 – Air conditioner system coolant temperature

sender

G111 – Sender for speed
J44 – Magnetic coupling relay
J201 – Protective diode
N25 – Air conditioner, magnetic coupling
S3

– Fuse in fuse box

T1d – Single connector, green, on compressor/ air

conditioner

T2b – 2-pin connector, black, in engine compartment,

front

T2c – 2-pin connector, green, in engine compartment,

left

T10 – 10-pin connector, brown, connector point,

electronics box, plenum chamber

T10m-

10-pin connector, black, connector point,
electronics box, plenum chamber

T10p – 10-pin connector, gray, left connector point, A

pillar

T14 – 14-pin connector, black, at steering column

switch

T16 – 16-pin connector, black, connector point,

electronics box, plenum chamber

A37

– Connection (58a), in dash panel wiring harness

A67

– Connection (normal earth, digital air

conditioner), in dash panel wiring harness

A68

– Connection (voltage supply, digital air

conditioner), in dash panel wiring harness

A76

– Connection (diagnosis wire K), in dash panel

wiring harness

*

– Only models with 4 cylinder models (engine

codes ADP and ADR)

**

– Only models with 6 cylinder