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Audi A4 Current Flow Diagram No. 9 / 1
Edition 04.2005
3.0 l - Fuel injection engine (162 kW - Motronic - 6 cylinder), engine code AVK, BGN
from model year 2003
Main fuse
On the battery
Fuse holder
Driver side dash panel
Fuse colours
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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 holder are designated as 223 in the Current Flow Diagram.
Coupling station with screw connection
In electronics box in plenum chamber
1 - 10-pin connector, black (T10)
2 - 10-pin connector, brown (T10a)
3 - 17-pin connector, red (T17d)
6 - 17-pin connector, white (T17e)
Coupling station of A-pillar
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Left bottom behind side trim
13 - 10-pin connector, violet (T10c)
14 - 10-pin connector, grey (T10d)
15 - 17-pin connector, green (T17b)
16 - 17-pin connector, red (T17a)
17 - 17-pin connector, black (T17)
4-point relay carrier with screw connection
Driver side dash panel
4-point relay carrier
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In electronics box in plenum chamber
1.1 - Continued coolant circulation relay (J151)
2 - Secondary air pump relay (J299)
3 - Motronic current supply relay (J271)
4 - Starter inhibitor relay (clutch pedal switch) (J434)
A - Motronic fuse (S282)
B - Secondary air pump fuse (S130)
9-point relay carrier with onboard supply control unit
Driver side dash panel, behind the 3-point relay carrier
1 - Fuel pump relay (J17)
4 - Brake servo relay (569)
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Audi A4 Current Flow Diagram No. 9 / 2
Battery, starter, alternator
A - Battery
B - Starter
C - Alternator
C1 - Voltage regulator
F194 - Clutch pedal switch
J434 - Starter inhibitor relay (clutch pedal switch)
S88 - Strip fuse (main fuse)
T1 - 1-pin connector, black, in right engine compartment
T2 - 2-pin connector, black, in right engine compartment
T17e - 17-pin connector, white, coupling station on electronics box,
plenum chamber
- Earth point, in battery box
11
- Earth connection 1, in interior wiring harness
238
- Screw connection 1 (30), on relay plate
500
* - for models with manual gearbox only
** - see applicable Current Flow Diagram for automatic gearbox
(multitronic 01J or AG5)
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 3
Fuel pump relay, ignition/starter switch, fuses
D - Ignition/starter switch
J17 - Fuel pump relay
S5 - Fuse in relay plate fuse holder
S7 - Fuse in relay plate fuse holder
S9 - Fuse in relay plate fuse holder
S14 - Fuse in relay plate fuse holder
S228 - Fuse in fuse holder
S232 - Fuse in fuse holder
S234 - Fuse in fuse holder
S243 - Fuse in fuse holder
T10a - 10-pin connector, brown, coupling station on electronics box,
plenum chamber
- Screw connection 2 (30), on relay plate
501
- Positive connection (15), in dash panel wiring harness
A2
- Positive connection (30), in dash panel wiring harness
A32
- Positive connection 2 (30), in dash panel wiring harness
A52
ws = white
sw = black - Positive connection 3 (30), in dash panel wiring harness
ro = red A57
br = brown
gn = green - Positive connection 4 (30), in dash panel wiring harness
bl = blue A98
gr = grey
li = purple - Connection 1 (87), in dash panel wiring harness
ge = yellow A99
or = orange
rs = pink - Connection 5 (87), in dash panel wiring harness
A152
* - for models with manual gearbox only
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Audi A4 Current Flow Diagram No. 9 / 4
Motronic control unit, Motronic current supply relay, fuses
J217 - Automatic gearbox control unit
J220 - Motronic control unit
J271 - Motronic current supply relay
S4 - Fuse in relay plate fuse holder
S229 - Fuse in fuse holder
S282 - Engine electronics fuse
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
T17e - 17-pin connector, white, coupling station on electronics box,
plenum chamber
- Earth point, on left in engine compartment
12
- Earth connection 1, in front right wiring harness
83
- Positive connection (30), in engine compartment wiring
D50
harness
- Connection (87), in engine wiring harness
D173
* - for models with automatic gearbox (AG5) only
** - for models with automatic gearbox (multitronic 01J) only
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 5
Motronic control unit, injectors, fuel system diagnostic pump
J220 - Motronic control unit
N30 - Injector, cylinder 1
N31 - Injector, cylinder 2
N32 - Injector, cylinder 3
N33 - Injector, cylinder 4
N83 - Injector, cylinder 5
N84 - Injector, cylinder 6
T10a - 10-pin connector, brown, coupling station on electronics box,
plenum chamber
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
V144 - Fuel system diagnostic pump
- Connection (injectors), in engine compartment wiring harness
D95
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 6
Air mass meter, Motronic control unit, active charcoal filter
system solenoid valve 1, secondary air inlet valve, variable intake
manifold change-over valve
G70 - Air mass meter
J220 - Motronic control unit
J293 - Radiator fan control unit
N80 - Activated charcoal filter system solenoid valve 1 (pulsed)
N112 - Secondary air inlet valve
N156 - Variable intake manifold change-over valve
T10a - 10-pin connector, brown, coupling station on electronics box,
plenum chamber
T10d - 10-pin connector, grey, coupling station on left of A-pillar
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
- Connection (via fuse 234), in front right wiring harness
D22
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 7
Motronic control unit, coolant temperature display sender, inlet
camshaft control valve, continued coolant circulation pump,
coolant shortage indicator switch
F66 - Coolant shortage indicator switch
G2 - Coolant temperature sender
G62 - Coolant temperature sender
J151 - Continued coolant circulation relay
J220 - Motronic control unit
N205 - Inlet camshaft control valve 1
N208 - Inlet camshaft control valve 2
N318 - Exhaust camshaft control valve 1
N319 - Exhaust camshaft control valve 2
V51 - Continued coolant circulation pump
T10 - 10-pin connector, black, coupling station on electronics box,
plenum chamber
- Earth connection 1, in front right wiring harness
83
- Earth connection (sender earth), in engine wiring harness
220
- Earth connection (sender earth) 1, in dash panel wiring
269
harness
- Earth connection (sender earth), in engine compartment
ws = white 327
wiring harness
sw = black
ro = red - Positive connection (87a), in Motronic wiring harness
E7
br = brown
gn = green
bl = blue * - for countries with hot climate only
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 8
Engine speed sender, knock sensors, Motronic control unit
G28 - Engine speed sender
G61 - Knock sensor 1
G66 - Knock sensor 2
J220 - Motronic control unit
T3 - 3-pin connector, grey, on engine block
T3b - 3-pin connector, blue, on engine block
T3e - 3-pin connector, blue, on engine block
- Earth connection in front right wiring harness - sensor earth -
104
- Earth connection (sender earth), in engine wiring harness
220
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 9
Hall sender, Motronic control unit
G40 - Hall sender
G163 - Hall sender 2
G300 - Hall sender 3
G301 - Hall sender 4
J220 - Motronic control unit
J217 - Automatic gearbox control unit
- Earth connection (sender earth), in engine wiring harness
220
- Earth connection (sender earth 2), in engine wiring harness
316
- Connection (5V), in engine wiring harness
D141
* - for models with automatic gearbox (multitronic 01J) only, up
to model year 2003
** - for models with automatic gearbox (AG5) only
*** - for models with automatic gearbox (multitronic 01J) only, from
model year 2004
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 10
Lambda probes, Motronic control unit
G39 - Lambda probe
G130 - Lambda probe after catalytic converter
J220 - Motronic control unit
T4a - 4-pin connector, green, connector point lambda probe
(bulkhead)
T6 - 6-pin connector, black, connector point lambda probe
(bulkhead)
Z19 - Lambda probe heater
Z29 - Lambda probe 1 heater after catalytic converter
- Earth connection (sender earth), in engine wiring harness
220
- Earth connection (sender earth 2), in engine wiring harness
316
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 11
Lambda probes, Motronic control unit
G108 - Lambda probe 2
G131 - Lambda probe 2 after catalytic converter
J220 - Motronic control unit
T4c - 4-pin connector, brown, connector point lambda probe
(bulkhead)
T6a - 6-pin connector, black, connector point lambda probe
(bulkhead)
Z28 - Lambda probe 2 heater
Z30 - Lambda probe 2 heater after catalytic converter
- Earth connection (sender earth), in engine wiring harness
220
- Earth connection (sender earth 2), in engine wiring harness
316
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 12
Brake servo pressure sensor, Motronic control unit, secondary air
pump motor, vacuum pump for brakes
G294 - Brake servo pressure sensor
J220 - Motronic control unit
J299 - Secondary air pump relay
J569 - Brake servo relay
S130 - Secondary air pump fuse
T10 - 10-pin connector, black, coupling station on electronics box,
plenum chamber
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
V101 - Secondary air pump motor
V192 - Vacuum pump for brakes
- Earth point, on left in engine compartment
12
- Earth connection 1, in front right wiring harness
83
- Earth connection (sender earth), in engine wiring harness
220
- Earth connection (sender earth 2), in engine wiring harness
316
ws = white * - for models with automatic gearbox (multitronic 01J or AG5)
sw = black only
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 13
Accelerator position sender, Motronic control unit, throttle valve
module
F - Brake light switch
F36 - Clutch pedal switch
G79 - Accelerator position sender
G185 - Accelerator position sender -2-
J220 - Motronic control unit
J234 - Airbag control unit
J338 - Throttle valve module
J527 - Steering column electronics control unit
T16a - 16-pin connector, black, on steering column electronics
control unit
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
T17e - 17-pin connector, white, coupling station on electronics box,
plenum chamber
- Connection (54), in dash panel wiring harness
A18
- Connection (15a), in dash panel wiring harness
A20
- Connection (crash signal), in dash panel wiring harness
A125
ws = white
sw = black
- Connection (brake pedal switch), in dash panel wiring
A154
ro = red harness
br = brown * - for models with manual gearbox only
gn = green
bl = blue ** - is dropped, from model year 2003 (phased-in modification)
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 14
Motronic control unit, ignition coils
J220 - Motronic control unit
N70 - Ignition coil 1 with output stage
N127 - Ignition coil 2 with output stage
N291 - Ignition coil 3 with output stage
P - Spark plug connector
Q - Spark plugs
- Earth point, on engine block
18
- Earth connection 1, in front right wiring harness
83
- Earth connection (ignition coil), in injection system wiring
343
harness
- Connection (via fuse 229), in front right wiring harness
D23
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi A4 Current Flow Diagram No. 9 / 15
Motronic control unit, ignition coils
J217 - Automatic gearbox control unit
J220 - Motronic control unit
N292 - Ignition coil 4 with output stage
N323 - Ignition coil -5- with output stage
N324 - Ignition coil -6- with output stage
P - Spark plug connector
Q - Spark plugs
T10 - 10-pin connector, black, coupling station on electronics box,
plenum chamber
T10a - 10-pin connector, brown, coupling station on electronics box,
plenum chamber
T16 - 16-pin connector, black, diagnostic connector
T17d - 17-pin connector, red, coupling station on electronics box,
plenum chamber
- Earth connection 1, in front right wiring harness
83
- Earth connection (ignition coil), in injection system wiring
343
harness
- Connection (diagnosis wire K), in dash panel wiring harness
A76
- Connection (high bus), in dash panel wiring harness
ws = white A121
sw = black
ro = red - Connection (low bus), in dash panel wiring harness
A122
br = brown
gn = green
bl = blue - Connection (via fuse 229), in front right wiring harness
D23
gr = grey
li = purple
ge = yellow * - for models with automatic gearbox (multitronic 01J) only, up
or = orange to model year 2003
rs = pink ** - for models with automatic gearbox (AG5) only
*** - for models with automatic gearbox (multitronic 01J) only, from
model year 2004
● - CAN bus (data bus)
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Audi A4 Current Flow Diagram No. 9 / 16
Control unit with display in dash panel insert, oil pressure switch
fuel pump, oil level and oil temperature sender, fuel gauge sender
2
F1 - Oil pressure switch
G - Fuel gauge sender
G6 - Fuel pump (pre-supply pump)
G169 - Fuel gauge sender 2
G266 - Oil level and oil temperature sender
J285 - Control unit with display in dash panel insert
K2 - Alternator warning lamp
T10 - 10-pin connector, black, coupling station on electronics box,
plenum chamber
T10a - 10-pin connector, brown, coupling station on electronics box,
plenum chamber
T32 - 32-pin connector, blue, on dash panel insert
T32a - 32-pin connector, green, on dash panel insert
- Earth connection 1, in front right wiring harness
83
- Earth connection 2, in interior wiring harness
249
- Earth connection (sender earth) 1, in dash panel wiring
269
harness
ws = white - Connection (61), in dash panel wiring harness
sw = black A17
ro = red
br = brown - Connection (15a, fuse 5), in dash panel wiring harness
A74
gn = green
bl = blue
gr = grey * - for models with four-wheel drive only
li = purple
ge = yellow
or = orange
rs = pink
