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