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Audi Q7 Current Flow Diagram No. 3 / 1
Edition 02.2006
Audi Q7 4.2 l Fuel injection engine (257 kW - 8 cylinder), engine code BAR
from model year 2007
Notes:
For information concerning
Position of relays and fuses
Multi-pin connections
Control units and relays
Earth connections
→ List of Fitting Locations!
For information concerning
Fault Finding Programs
→ guided fault finding
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Audi Q7 Current Flow Diagram No. 3 / 2
Battery, terminal 15 voltage supply relay, energy management
control unit, battery isolation igniter, fuses
A - Battery
J234 - Airbag control unit
J329 - Terminal 15 voltage supply relay
J518 - Entry and start authorisation control unit
J644 - Energy management control unit
N253 - Battery isolation igniter
SB8 - Fuse 8 on fuse holder B
SB9 - Fuse 9 on fuse holder B
SD1 - Fuse 1 on fuse holder D
SD2 - Fuse 2 on fuse holder D
SD3 - Fuse 3 on fuse holder D
SD4 - Fuse 4 on fuse holder D
SD5 - Fuse 5 on fuse holder D
SD7 - Fuse 7 on fuse holder D
T10d - 10-pin connector, blue, coupling station on electronics box,
plenum chamber
T20e - 20-pin connector, black, on entry and start authorisation
control unit
T46a - 46-pin connector, black, CAN separating connector left
T75 - 75-pin connector, grey, on airbag control unit (USA: white)
B272
- Positive connection (30), in main wiring harness
ws = white
sw = black
ro = red - Positive connection (15), in main wiring harness
B273
br = brown
gn = green
bl = blue • - CAN bus (data wire)
gr = grey * - Relay and fuse carrier under driver seat
li = purple
ge = yellow ** - screw connection (31) battery wire before driver seat
or = orange
rs = pink
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Audi Q7 Current Flow Diagram No. 3 / 3
Starter, alternator, starter motor relay, starter motor relay 2, slave
start socket
B - Starter
C - Alternator
C1 - Voltage regulator
J53 - Starter motor relay
J695 - Starter motor relay 2
T2 - 2-pin connector, black, on alternator
T6m - 6-pin connector, white, coupling station on electronics box,
plenum chamber
T10f - 10-pin connector, red, coupling station on electronics box,
plenum chamber
TV22 - Terminal 30 wiring junction 2
U6 - Slave start socket
13
- Earth point, on right in engine compartment
- Earth point on engine block
18
D51
- Positive connection 1 (15), in engine compartment wiring
harness
- Connection (50), in engine compartment wiring harness
D97
ws = white * - Relay and fuse carrier, electronics box plenum chamber
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 Q7 Current Flow Diagram No. 3 / 4
Engine control unit, Motronic current supply relay
J271 - Motronic current supply relay
J623 - Engine control unit
S17 - Fuses in relay plate fuse holder
T94 - 94-pin connector, black, on engine control unit
- Earth connection 1, in engine compartment wiring harness
85
609
- Earth point, on right in plenum chamber
- Positive connection (30), in engine compartment wiring
D50
harness
D75
- Positive connection 2 (30), in engine compartment wiring
harness
D101
- Connection 1, in engine compartment wiring harness
D102
- Connection 2, in engine compartment wiring harness
* - Relay and fuse carrier, electronics box plenum chamber
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 Q7 Current Flow Diagram No. 3 / 5
Engine control unit
E45 - Cruise control system switch
J518 - Entry and start authorisation control unit
J527 - Steering column electronics control unit
J623 - Engine control unit
S9 - Fuses in relay plate fuse holder
S11 - Fuses in relay plate fuse holder
T10c - 10-pin connector, pink, coupling station on electronics box,
plenum chamber
T10d - 10-pin connector, blue, coupling station on electronics box,
plenum chamber
T16a - 16-pin connector, on steering column electronics control unit
T20e - 20-pin connector, black, on entry and start authorisation
control unit
T46a - 46-pin connector, black, CAN separating connector left
T94 - 94-pin connector, black, on engine control unit
- Positive connection 2 (15), in engine compartment wiring
D100
harness
D103
- Connection 3, in engine compartment wiring harness
• - CAN bus (data wire)
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 Q7 Current Flow Diagram No. 3 / 6
Engine control unit, ignition coil 1 - 4 with output stage
J623 - Engine control unit
N70 - Ignition coil 1 with output stage
N127 - Ignition coil 2 with output stage
N291 - Ignition coil 3 with output stage
N292 - Ignition coil 4 with output stage
P - Spark plug connector
Q - Spark plugs
S7 - Fuses in relay plate fuse holder
T6m - 6-pin connector, white, coupling station on electronics box,
plenum chamber
T60 - 60-pin connector, black, on engine control unit
281
- Earth connection 1, in engine harness
- Earth connection 2, in engine harness
283
600
- Earth point, on right of cylinder head
- Earth point, on right in plenum chamber
609
D173
- Connection (87), in engine wiring harness
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 Q7 Current Flow Diagram No. 3 / 7
Engine control unit, ignition coil 5 -8 with output stage
J623 - Engine control unit
N323 - Ignition coil 5 with output stage
N324 - Ignition coil 6 with output stage
N325 - Ignition coil 7 with output stage
N326 - Ignition coil 8 with output stage
P - Spark plug connector
Q - Spark plugs
T60 - 60-pin connector, black, on engine control unit
- Earth connection 1, in engine harness
281
458
- Earth connection 3, in engine harness
- Earth point, on left of cylinder head
601
- Connection (87), in engine wiring harness
D173
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 Q7 Current Flow Diagram No. 3 / 8
Engine control unit, injector for cylinders 1, 2, 6, 8
J623 - Engine control unit
N30 - Injector, cylinder 1
N31 - Injector, cylinder 2
N84 - Injector, cylinder 6
N86 - Injector, cylinder 8
T14m - 14-pin connector, black, in engine compartment, bank 1
T14n - 14-pin connector, black, in engine compartment, bank 2
T60 - 60-pin connector, black, on engine control unit
- Connection 17, in engine compartment wiring harness
D119
D120
- Connection 18, in engine compartment wiring harness
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 Q7 Current Flow Diagram No. 3 / 9
Engine control unit, injector for cylinders 3, 4, 5, 7
J623 - Engine control unit
N32 - Injector, cylinder 3
N33 - Injector, cylinder 4
N83 - Injector, cylinder 5
N85 - Injector, cylinder 7
T14m - 14-pin connector, black, in engine compartment, bank 1
T14n - 14-pin connector, black, in engine compartment, bank 2
T60 - 60-pin connector, black, on engine control unit
- Connection 15, in engine compartment wiring harness
D117
D118
- Connection 16, in engine compartment wiring harness
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 Q7 Current Flow Diagram No. 3 / 10
Engine control unit, knock sensor
G61 - Knock sensor 1
G66 - Knock sensor 2
G198 - Knock sensor 3
G199 - Knock sensor 4
J623 - Engine control unit
T3k - 3-pin connector, black, on knock sensor 1
T3n - 3-pin connector, brown, on knock sensor 2
T3o - 3-pin connector, black, on knock sensor 3
T3p - 3-pin connector, brown, on knock sensor 4
T60 - 60-pin connector, black, on engine control unit
220
- Earth connection (sender earth), in engine wiring harness
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 Q7 Current Flow Diagram No. 3 / 11
Engine control unit, engine speed sender, Hall sender
G28 - Engine speed sender
G40 - Hall sender
G300 - Hall sender 3
J623 - Engine control unit
T60 - 60-pin connector, black, on engine control unit
220
- Earth connection (sender earth), in engine wiring harness
D141
- Connection (5V), in engine wiring harness
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 Q7 Current Flow Diagram No. 3 / 12
Engine control unit, coolant temperature sender, fuel pressure
sender, intake manifold flap potentiometer
G62 - Coolant temperature sender
G247 - Fuel pressure sender
G336 - Intake manifold flap potentiometer
G512 - Intake manifold flap 2 potentiometer
J623 - Engine control unit
T14m - 14-pin connector, black, in engine compartment, bank 1
T60 - 60-pin connector, black, on engine control unit
327
- Earth connection (sender earth), in engine compartment
wiring harness
- Connection (5V), in engine wiring harness
D141
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 Q7 Current Flow Diagram No. 3 / 13
Engine control unit, air mass meter, radiator outlet coolant
temperature sender, Hall sender, fuel pressure sender for low
pressure, intake air temperature sender
G42 - Intake air temperature sender
G70 - Air mass meter
G83 - Radiator outlet coolant temperature sender
G163 - Hall sender 2
G246 - Air mass meter 2
G301 - Hall sender 4
G410 - Fuel pressure sender for low pressure
J623 - Engine control unit
T6m - 6-pin connector, white, coupling station on electronics box,
plenum chamber
T10m - 10-pin connector, black, coupling station on electronics box,
plenum chamber
T94 - 94-pin connector, black, on engine control unit
D112
- Connection 10, in engine compartment wiring harness
- Connection 11, in engine compartment wiring harness
D113
D114
- Connection 12, in engine compartment wiring harness
ws = white - Earth connection 2 (5V), in engine wiring harness
D174
sw = black
ro = red
br = brown D195
- Connection 1 (5V), in engine compartment wiring harness
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
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Audi Q7 Current Flow Diagram No. 3 / 14
Engine control unit, high pressure sender, brake servo pressure
sensor, active charcoal filter system solenoid valve 1, fuel
metering valve
G65 - High pressure sender
G294 - Brake servo pressure sensor
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
rs = pink
