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Wiring diagrams AUDI Audi A6 4.2 l – Fuel injection engine (246 kW – Motronic – 8 cylinder), engine code BAT, BNK

Wiring diagrams AUDI Audi A6 4.2 l - Fuel injection engine (246 kW - Motronic - 8 cylinder), engine code BAT, BNK from model year 2005

Audi A6	Current Flow Diagram	No. 2 / 1

		Edition 12.2009

Notes:

For information concerning

t	Position of relays and fuses

t	Multi-pin connections

t	Control units and relays

t	Earth connections

→ List of Fitting Locations!

For information concerning

t	Fault Finding Programs

→ guided fault finding

Audi A6	Current Flow Diagram	No. 2 / 2

Wiring diagrams AUDI Audi A6 4.2 l – Fuel injection engine (246 kW – Motronic – 8 cylinder), engine code BAT, BNK

ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Battery, energy management control unit, battery cut-off relay, fuse

Battery

J234

Airbag control unit

J644

Energy management control unit

J655

Battery cut-off relay

N253

Battery isolation igniter

S131

Fuse 1

S132

Fuse 2

S133

Fuse 3

S134

Fuse 4

SF6

Fuse 6 on fuse holder F

SF8

Fuse 8 on fuse holder F

T46b

46-pin connector, CAN disconnector right

T75

75-pin connector, grey, on airbag control unit (USA: white)

Earth point, on right in engine compartment

Earth point on engine block

372

Earth connection 7, in main wiring harness

B163

Positive connection 1 (15), in interior wiring harness

B272

Positive connection (30), in main wiring harness

B300

Positive connection 4 (30), in main wiring harness

B301

Positive connection 5 (30), in main wiring harness

B397

Connection 1 (convenience CAN bus, high), in main wiring harness

B406

Connection 1 (convenience CAN bus, low), in main wiring harness

•

CAN bus (data wire)

Fuse and relay carrier right in luggage compartment

up to about week 26.04

***

from about week 27.04

Audi A6	Current Flow Diagram	No. 2 / 3

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Starter, alternator, terminal 15 voltage supply relay, starter motor relay

Starter

Alternator

Voltage regulator

C24

Suppression filter

J53

Starter motor relay

J329

Terminal 15 voltage supply relay

J518

Entry and start authorisation control unit

J695

Starter motor relay 2

S42

Radiator fan single fuse

S104

Radiator fan fuse for 2nd speed

T1b

Single connector, black, in front right engine compartment

2-pin connector, black, on alternator

T17a

17-pin connector, red, coupling station on electronics box, left in plenum chamber

T20h

20-pin connector, connector A, on entry and start authorisation control unit

646

Earth point 2, on bulkhead

B165

Positive connection 2 (15), in interior wiring harness

B273

Positive connection (15), in main wiring harness

B276

Positive connection (50), in main wiring harness

B298

Positive connection 2 (30), in main wiring harness

D97

Connection (50), in engine compartment right wiring harness

Main fuse carrier electronics box right in plenum chamber

9-point relay carrier, behind driver storage compartment

up to October 2005

from November 2005

♦

no longer fitted, phased from model year 2006

Audi A6	Current Flow Diagram	No. 2 / 4

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, Motronic current supply relay

J271

Motronic current supply relay

J518

Entry and start authorisation control unit

J623

Engine control unit

SA18

Fuse 8 on fuse holder in engine compartment

T17a

17-pin connector, red, coupling station on electronics box, left in plenum chamber

T20h

20-pin connector, black, connector A, on entry and start authorisation control unit

Earth connection 1, in engine compartment wiring harness

131

Earth connection 2, in engine compartment wiring harness

132

Earth connection 3, in engine compartment wiring harness

167

Earth connection 4, in engine compartment wiring harness

600

Earth point, on right of cylinder head

601

Earth point, on left of cylinder head

645

Earth point 1, on bulkhead

646

Earth point 2, on bulkhead

B302

Positive connection 6 (30), in main wiring harness

D50

Positive connection (30), in engine compartment wiring harness

D101

Connection 1, in engine compartment wiring harness

Screw connection in electronics box left in plenum chamber

Relay carrier electronics box left in plenum chamber

Audi A6	Current Flow Diagram	No. 2 / 5

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, injector, cylinder 1 - 4, ignition coil 1 - 4 with output stage

J623

Engine control unit

N30

Injector, cylinder 1

N31

Injector, cylinder 2

N32

Injector, cylinder 3

N33

Injector, cylinder 4

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

Spark plug connector

Spark plugs

SA14

Fuse 4 on coupling station on left compartment

Earth connection 1, in engine compartment wiring harness

132

Earth connection 3, in engine compartment wiring harness

D95

Connection (injectors), in engine compartment wiring harness

D102

Connection 2, in engine compartment wiring harness

Audi A6	Current Flow Diagram	No. 2 / 6

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, injector, cylinder 5 - 8, ignition coil 5 - 8 with output stage

J623

Engine control unit

N83

Injector, cylinder 5

N84

Injector, cylinder 6

N85

Injector, cylinder 7

N86

Injector, cylinder 8

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

Spark plug connector

Spark plugs

SA12

Fuse 2 on fuse holder in engine compartment

131

Earth connection 2, in engine compartment wiring harness

167

Earth connection 4, in engine compartment wiring harness

D95

Connection (injectors), in engine compartment wiring harness

D102

Connection 2, in engine compartment wiring harness

Audi A6	Current Flow Diagram	No. 2 / 7

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, engine speed sender, Hall sender, Hall sender 2, coolant temperature sender

G28

Engine speed sender

G40

Hall sender

G62

Coolant temperature sender

G163

Hall sender 2

J217

Automatic gearbox control unit

J623

Engine control unit

T3e

3-pin connector, grey, on engine speed sender

T16

16-pin connector, diagnostic connector

T16c

16-pin connector, black, on automatic gearbox control unit

T17a

17-pin connector, red, coupling station on electronics box, left in plenum chamber

T46a

46-pin connector, CAN disconnector left

220

Earth connection (sender earth), in engine wiring harness

D106

Connection 4, in engine compartment wiring harness

D166

Connection (K-diagnosis wiring), in engine compartment wiring harness

•

CAN bus (data wire)

up to model year 2005

from model year 2006

Audi A6	Current Flow Diagram	No. 2 / 8

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, knock sensors 1 - 4

G61

Knock sensor 1

G66

Knock sensor 2

G198

Knock sensor 3

G199

Knock sensor 4

J623

Engine control unit

T3a

3-pin connector, blue, on knock sensor 1

T3b

3-pin connector, black, on knock sensor 2

T3c

3-pin connector, black, on knock sensor 3

T3d

3-pin connector, blue, on knock sensor 4

220

Earth connection (sender earth), in engine wiring harness

316

Earth connection (sender earth 2), in engine wiring harness

D108

Connection 6, in engine compartment wiring harness

D109

Connection 7, in engine compartment wiring harness

Audi A6	Current Flow Diagram	No. 2 / 9

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, accelerator position sender, throttle valve module

E45

Cruise control system switch

G79

Accelerator position sender

G185

Accelerator position sender 2

G186

Throttle valve drive (electric power control)

G187

Throttle valve drive angle sender 1 for electric throttle

G188

Throttle valve drive angle sender 2 for electric throttle

J217

Automatic gearbox control unit

J338

Throttle valve module

J518

Entry and start authorisation control unit

J527

Steering column electronics control unit

J623

Engine control unit

T16c

16-pin connector, black, on automatic gearbox control unit

T17b

17-pin connector, black, coupling station on electronics box, left in plenum chamber

T17c

17-pin connector, white, coupling station on electronics box, left in plenum chamber

T20h

20-pin connector, black, connector A, on entry and start authorisation control unit

E26

Connection selector lever lock, in Motronic wiring harness

models with cruise control system

Audi A6	Current Flow Diagram	No. 2 / 10

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, lambda probe, lambda probe 2

G39

Lambda probe

G108

Lambda probe 2

J623

Engine control unit

SA16

Fuse 6 on fuse holder in engine compartment

T6a

6-pin connector, black, for Lambda probe

T6b

6-pin connector, black, for Lambda probe 2

Z19

Lambda probe heater

Z28

Lambda probe 2 heater

D112

Connection 10, in engine compartment wiring harness

Audi A6	Current Flow Diagram	No. 2 / 11

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, air mass meter, active charcoal filter system solenoid valve 1, variable intake manifold change-over valve, lambda probe after catalytic converter

G70

Air mass meter

G130

Lambda probe after catalytic converter

G131

Lambda probe 2 after catalytic converter

J623

Engine control unit

N80

Activated charcoal filter system solenoid valve 1

N335

Variable intake manifold change-over valve

SA15

Fuse 5 on fuse holder in engine compartment

SA17

Fuse 7 on fuse holder in engine compartment

T4a

4-pin connector, black, for Lambda probe 1 after catalytic converter

T4b

4-pin connector, brown, for Lambda probe 2 after catalytic converter

Z29

Lambda probe 1 heater after catalytic converter

Z30

Lambda probe 2 heater after catalytic converter

D103

Connection 3, in engine compartment wiring harness

D113

Connection 11, in engine compartment wiring harness

Audi A6	Current Flow Diagram	No. 2 / 12

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, secondary air pump relay, electrohydraulic engine mounting solenoid valves, variable intake manifold change-over valve, secondary air pump motor, fuel system diagnostic pump

J299

Secondary air pump relay

J623

Engine control unit

N112

Secondary air inlet valve

N144

Left electrohydraulic engine mounting solenoid valve

N145

Right electrohydraulic engine mounting solenoid valve

N156

Variable intake manifold change-over valve

S130

Secondary air pump fuse

T17b

17-pin connector, black, coupling station on electronics box, left in plenum chamber

V101

Secondary air pump motor

V144

Fuel system diagnostic pump

614

Earth point 2, on right in engine compartment

D103

Connection 3, in engine compartment wiring harness

models with fuel system diagnostic pump

Relay carrier electronics box on right in plenum chamber

Audi A6	Current Flow Diagram	No. 2 / 13

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, continued coolant circulation relay, inlet camshaft control valve, radiator fan, continued coolant circulation pump

J151

Continued coolant circulation relay

J217

Automatic gearbox control unit

J293

Radiator fan control unit

J623

Engine control unit

J671

Radiator fan control unit -2-

N205

Inlet camshaft control valve 1

N208

Inlet camshaft control valve 2

SA13

Fuse 3 on fuse holder in engine compartment

SA19

Fuse 9 on fuse holder in engine compartment

SA20

Fuse 10 on fuse holder in engine compartment

T4c

4-pin connector, black, electronics box, right in plenum chamber, radiator fan

T16c

16-pin connector, black, on automatic gearbox control unit

Radiator fan

V51

Continued coolant circulation pump

V177

Radiator fan 2

131

Earth connection 2, in engine compartment wiring harness

614

Earth point 2, on right in engine compartment

D111

Connection 9, in engine compartment wiring harness

K21

Connection 1, in radiator fan wiring harness

for super hot countries only

Relay carrier electronics box left in plenum chamber

Audi A6	Current Flow Diagram	No. 2 / 14

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Engine control unit, brake light switch, fuel pump relay

Brake light switch

F47

Brake pedal switch

J17

Fuel pump relay

J104

ABS control unit

J623

Engine control unit

SB14

Fuse 14 on fuse holder B

SB38

Fuse 38 on fuse holder B

T17a

17-pin connector, red, coupling station on electronics box, left in plenum chamber

T17f

17-pin connector, green, coupling station on left A-pillar

B335

Connection 1 (54), in main wiring harness

B336

Connection 2 (54), in main wiring harness

D51

Positive connection 1 (15), in engine compartment wiring harness

D107

Connection 5, in engine compartment wiring harness

Relay carrier electronics box left in plenum chamber

up to October 2005

***

from November 2005

Audi A6	Current Flow Diagram	No. 2 / 15

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Control unit in dash panel insert, fuel system pressurisation pump, fuel gauge sender, fuel gauge sender 2

Fuel gauge sender

Fuel gauge

Fuel system pressurisation pump

G169

Fuel gauge sender 2

J285

Control unit in dash panel insert

SC1

Fuse 1 on fuse holder C

T5a

5-pin connector, black, on fuel tank

T17b

17-pin connector, black, coupling station on electronics box, left in plenum chamber

T32

32-pin connector, grey, on dash panel insert

Y24

Display in dash panel insert

371

Earth connection 6, in main wiring harness

410

Earth connection 1 (sender earth), in main wiring harness

output sender earth

Audi A6	Current Flow Diagram	No. 2 / 16

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ws	=	white
sw	=	black
ro	=	red
rt	=	red
br	=	brown
gn	=	green
bl	=	blue
gr	=	grey
li	=	purple
vi	=	purple
ge	=	yellow
or	=	orange
rs	=	pink

Control unit in dash panel insert, oil pressure warning lamp, coolant temperature and coolant shortage warning lamp, oil pressure switch, coolant shortage indicator switch, oil level and oil temperature sender

Oil pressure switch

F66

Coolant shortage indicator switch

G266

Oil level and oil temperature sender

J285

Control unit in dash panel insert

J533

Data bus diagnostic interface

Oil pressure warning lamp

K28

Coolant temperature and coolant shortage warning lamp

SB4

Fuse 4 on fuse holder B

T17a

17-pin connector, red, coupling station on electronics box, left in plenum chamber

T17b

17-pin connector, black, coupling station on electronics box, left in plenum chamber

T26a

26-pin connector, black, on data bus diagnostic interface

T32

32-pin connector, grey, on dash panel insert

Y24

Display in dash panel insert

Earth connection 1, in engine compartment wiring harness

410

Earth connection 1 (sender earth), in main wiring harness

•

CAN bus (data wire)

up to October 2005

from November 2005

Wiring diagrams AUDI Audi A6 4.2 l – Fuel injection engine (246 kW – Motronic – 8 cylinder), engine code BAT, BNK

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