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AUDI A6 2003 – 4.2 litre fuel injection engine (221 kW – Motronic – 8-cylinder), engine code BAS (allroad models) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A6 2003 - Battery - starter - alternator



Wiring Diagram  AUDI A6 2003 - Battery - starter - alternator https://portal-diagnostov.com/license.html
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ABattery
BStarter
CAlternator
C1Voltage regulator
DIgnition/starter switch
J31Automatic intermittent wash/wipe relay
S205Fuse -2- (30)
T2cl2-pin connector, black, on alternator
T4ay4-pin connector, black, in engine compartment, right
T10o10-pin connector, brown, connector point, electronics box, plenum chamber
T10p10-pin connector, black, connector point, electronics box, plenum chamber
   1 Earth strap, battery - body
   3 Earth strap, engine - body
   81 Earth connection -1-, in dash panel wiring harness
   A17 Connection (61), in dash panel wiring harness
   A41 Positive (+) connection (50), in dash panel wiring harness
   D66 Positive (+) connection (61), in engine compartment wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - starter inhibitor relay



Wiring Diagram  AUDI A6 2003 - Motronic control unit - starter inhibitor relay https://portal-diagnostov.com/license.html
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DIgnition/starter switch
E3Hazard warning light switch
F125Multi-function switch
J207Starter inhibitor relay
J220Motronic control unit
J234Airbag control unit
T99-pin connector, brown, at starter inhibitor relay
T17k17-pin connector, red, connector point, electronics box, plenum chamber
T17m17-pin connector, blue, connector point, A pillar, right
   12 Earth point, in engine compartment, left
   85 Earth connection -1-, in engine compartment wiring harness
   131 Earth connection -2-, in engine compartment wiring harness
   A2 Positive (+) connection (15), in dash panel wiring harness
   A125 Connection (crash signal), in dash panel wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - injectors and ignition coils for cylinders 1 - 4



Wiring Diagram  AUDI A6 2003 - Motronic control unit - injectors and ignition coils for cylinders 1 - 4 https://portal-diagnostov.com/license.html
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J220Motronic control unit
N30Injector, cylinder 1
N31Injector, cylinder 2
N32Injector, cylinder 3
N33Injector, cylinder 4
N70Ignition coil 1 with output stage
N127Ignition coil 2 with output stage
N291Ignition coil 3 with output stage
N292Ignition coil 4 with output stage
PSpark plug connector
QSpark plugs
S229Fuse 29 in fuse box
T10n10-pin connector, orange, connector point, electronics box, plenum chamber
T17h17-pin connector, brown, connector point, A pillar, left
T17i17-pin connector, white, connector point, electronics box, plenum chamber
   85 Earth connection -1-, in engine compartment wiring harness
   132 Earth connection -3-, in engine compartment wiring harness
   D23 Connection (via fuse 229), in front right wiring harness
   D131 Connection (15) via fuse 232, in engine compartment wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - injectors and ignition coils for cylinders 5 - 8



Wiring Diagram  AUDI A6 2003 - Motronic control unit - injectors and ignition coils for cylinders 5 - 8 https://portal-diagnostov.com/license.html
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J220Motronic control unit
N83Injector, cylinder 5
N84Injector, cylinder 6
N85Injector, cylinder 7
N86Injector, cylinder 8
N323Ignition coil 5 with final output stage
N324Ignition coil 6 with final output stage
N325Ignition coil 7 with final output stage
N326Ignition coil 8 with final output stage
PSpark plug connector
QSpark plugs
T10n10-pin connector, orange, connector point, electronics box, plenum chamber
   131 Earth connection -2-, in engine compartment wiring harness
   132 Earth connection -3-, in engine compartment wiring harness
   D23 Connection (via fuse 229), in front right wiring harness
   D131 Connection (15) via fuse 232, in engine compartment wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - throttle valve control unit - accelerator pedal position senders - knock sensor 1 - knock sensor 2 - inlet camshaft timing adjustment valves



Wiring Diagram  AUDI A6 2003 - Motronic control unit - throttle valve control unit - accelerator pedal position senders - knock sensor 1 - knock sensor 2 - inlet camshaft timing adjustment valves https://portal-diagnostov.com/license.html
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G61Knock sensor 1
G66Knock sensor 2
G79Accelerator pedal position sender
G185Accelerator pedal position sender -2-
G186Throttle valve drive (electric power control)
G187Throttle valve drive angle sender -1- (electric power control)
G188Throttle valve drive angle sender -2- (electric power control)
J220Motronic control unit
J338Throttle valve control unit
N205Inlet camshaft timing adjustment valve -1-
N208Inlet camshaft timing adjustment valve -2-
S282Engine electronics fuse
T3x3-pin connector, blue, at knock sensor 1
T3az3-pin connector, black, at knock sensor 2
T17i17-pin connector, white, connector point, electronics box, plenum chamber
   19 Earth point, near ignition coil
   132 Earth connection -3-, in engine compartment wiring harness
   220 Earth connection (sender earth), in engine wiring harness
   D52 Positive (+) connection (15a), in engine compartment wiring harness
   D102 Connection -2-, in engine compartment wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - knock sensor 3 - knock sensor 4 - engine speed sender - coolant temperature senders - Motronic current supply relay



Wiring Diagram  AUDI A6 2003 - Motronic control unit - knock sensor 3 - knock sensor 4 - engine speed sender - coolant temperature senders - Motronic current supply relay https://portal-diagnostov.com/license.html
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G2Coolant temperature sender
G28Engine speed sender
G62Coolant temperature sender
G198Knock sensor 3
G199Knock sensor 4
J220Motronic control unit
J271Motronic current supply relay
T3k3-pin connector, grey, on engine speed sender
T3bl3-pin connector, black, at knock sensor 3
T3bm3-pin connector, blue, at knock sensor 4
T10o10-pin connector, brown, connector point, electronics box, plenum chamber
T10p10-pin connector, black, connector point, electronics box, plenum chamber
   139 Earth connection (sender earth), in Motronic wiring harness
   220 Earth connection (sender earth), in engine wiring harness
   269 Earth connection (sender earth) -1-, in dash panel wiring harness
   D50 Positive (+) connection (30), in engine compartment wiring harness
   D102 Connection -2-, in engine compartment wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - Hall senders - brake light switch - brake servo pressure sensor



Wiring Diagram  AUDI A6 2003 - Motronic control unit - Hall senders - brake light switch - brake servo pressure sensor https://portal-diagnostov.com/license.html
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FBrake light switch
F47Cruise control system brake pedal switch
G40Hall sender
G163Hall sender 2
G294Brake servo pressure sensor
J104ABS with EDL control unit
J220Motronic control unit
M9Brake light bulb, left
M10Brake light bulb, right
S5Fuse in fuse box
S7Fuse in fuse box
S13Fuse in fuse box
T10n10-pin connector, orange, connector point, electronics box, plenum chamber
T17f17-pin connector, black, in 8-point relay carrier, behind driver's storage compartment
T17i17-pin connector, white, connector point, electronics box, plenum chamber
   220 Earth connection (sender earth), in engine wiring harness
   A18 Connection (54), in dash panel wiring harness
   A52 Positive (+) connection 2 (30), in dash panel wiring harness
   E16 Positive (+) connection (5 volts), in Motronic wiring harness
   J9 Connection -1- (15a), in ABS wiring harness
*ABS 5.3
**ABS 5.7

Wiring Diagram AUDI A6 2003 - Motronic control unit - secondary air pump relay - activated charcoal filter system solenoid valve 1 (pulsed) - cruise control system switch



Wiring Diagram  AUDI A6 2003 - Motronic control unit - secondary air pump relay - activated charcoal filter system solenoid valve 1 (pulsed) - cruise control system switch https://portal-diagnostov.com/license.html
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E45Cruise control system switch
J220Motronic control unit
J299Secondary air pump relay
N80Activated charcoal filter system solenoid valve 1 (pulsed)
N112Secondary air inlet valve
N144Electro/hydraulic engine mounting solenoid valve, left
N145Electro/hydraulic engine mounting solenoid valve, right
N156Intake manifold change-over valve
S130Secondary air pump fuse
T17i17-pin connector, white, connector point, electronics box, plenum chamber
V101Secondary air pump motor
   12 Earth point, in engine compartment, left
   A16 Connection (cruise control system), in dash panel wiring harness
   A32 Positive (+) connection (30), in dash panel wiring harness
   D22 Connection (via fuse 234), in front right wiring harness
*Models with cruise control system

Wiring Diagram AUDI A6 2003 - Motronic control unit - lambda probes - air mass meter



Wiring Diagram  AUDI A6 2003 - Motronic control unit - lambda probes - air mass meter https://portal-diagnostov.com/license.html
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G39Lambda probe
G70Air mass meter
G108Lambda probe 2
J220Motronic control unit
T6as6-pin connector, black, for lambda probe 1, right
T6av6-pin connector, black, for lambda probe 2, left
Z19Lambda probe heater
Z28Lambda probe 2 heater
   D22 Connection (via fuse 234), in front right wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - fuel pump relay - lambda probes downstream of catalytic converter



Wiring Diagram  AUDI A6 2003 - Motronic control unit - fuel pump relay - lambda probes downstream of catalytic converter https://portal-diagnostov.com/license.html
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G130Lambda probe downstream of catalytic converter
G131Lambda probe 2 downstream of catalytic converter
J17Fuel pump relay
J220Motronic control unit
S228Fuse 28 in fuse box
S232Fuse 32 in fuse box
S234Fuse 34 in fuse box
T4s4-pin connector, green, for lambda probe 1 downstream of catalytic converter
T4t4-pin connector, brown, for lambda probe 2 downstream of catalytic converter
T10n10-pin connector, orange, connector point, electronics box, plenum chamber
T10p10-pin connector, black, connector point, electronics box, plenum chamber
Z29Lambda probe 1 heater, downstream of catalytic converter
Z30Lambda probe 2 heater, downstream of catalytic converter
   D22 Connection (via fuse 234), in front right wiring harness

Wiring Diagram AUDI A6 2003 - Motronic control unit - CAN bus - brake servo relay - vacuum pump for brakes



Wiring Diagram  AUDI A6 2003 - Motronic control unit - CAN bus - brake servo relay - vacuum pump for brakes https://portal-diagnostov.com/license.html
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J217Automatic gearbox control unit
J220Motronic control unit
J569Brake servo relay
S279Hydraulic pump relay fuse
T17k17-pin connector, red, connector point, electronics box, plenum chamber
T17m17-pin connector, blue, connector point, A pillar, right
V192Vacuum pump for brakes
   85 Earth connection -1-, in engine compartment wiring harness
   A121 Connection (high bus), in dash panel wiring harness
   A122 Connection (low bus), in dash panel wiring harness
CAN bus (data wire)
*Only applies to models for countries with hot climate

Wiring Diagram AUDI A6 2003 - Engine cooling - radiator fan control unit - radiator fan control unit -2- - high pressure sender



Wiring Diagram  AUDI A6 2003 - Engine cooling - radiator fan control unit - radiator fan control unit -2- - high pressure sender https://portal-diagnostov.com/license.html
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E87Control and display unit for air conditioner
G65High pressure sender
J293Radiator fan control unit, in engine compartment, front left
J671Radiator fan control unit -2-
S42Radiator fan single fuse
S104Radiator fan fuse, 2nd speed
S146Radiator fan fuse, run-on
T14a14-pin connector, black, in engine compartment, front left
T17h17-pin connector, brown, connector point, A pillar, left
V7Radiator fan
V177Radiator fan -2-
   44 Earth point, lower part of left A pillar
   193 Earth connection -1-, in radiator fan wiring harness

Wiring Diagram AUDI A6 2003 - Engine cooling - radiator fan relay - continued coolant circulation relay - radiator fan - right - continued coolant circulation pump - oil level thermo sender (service interval)



Wiring Diagram  AUDI A6 2003 - Engine cooling - radiator fan relay - continued coolant circulation relay - radiator fan - right - continued coolant circulation pump - oil level thermo sender (service interval) https://portal-diagnostov.com/license.html
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E87Control and display unit for air conditioner
F18Radiator fan thermo-switch
G266Oil level thermo sender, service interval
J26Radiator fan relay
J151Continued coolant circulation relay
N280Compressor regulating valve, air conditioning system
S94Radiator fan fuse, 3rd speed
S142Radiator fan control unit fuse
T10o10-pin connector, brown, connector point, electronics box, plenum chamber
T10p10-pin connector, black, connector point, electronics box, plenum chamber
V35Radiator fan, right
V51Continued coolant circulation pump
   85 Earth connection -1-, in engine compartment wiring harness
   131 Earth connection -2-, in engine compartment wiring harness
   A20 Positive (+) connection (15a), in dash panel wiring harness
   D75 Positive (+) connection -2- (30), in engine compartment wiring harness
*Models with continued coolant circulation pump
**Models with trailer coupling (applies to models for countries with hot climate)

Wiring Diagram AUDI A6 2003 - Dash panel insert - fuel pump - fuel gauge



Wiring Diagram  AUDI A6 2003 - Dash panel insert - fuel pump - fuel gauge https://portal-diagnostov.com/license.html
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GFuel gauge sender
G1Fuel gauge
G6Fuel pump (pre-supply pump)
G169Fuel gauge sender -2-
G237Fuel gauge sender -3-
J285Control unit with display in dash panel insert
K2Alternator warning lamp
T10f10-pin connector, brown, connector point, A pillar, left
T10ba10-pin connector, blue, connector point, A pillar, left
T16a16-pin connector, diagnosis connection
T3232-pin connector, blue, on dash panel insert
T32a32-pin connector, green, on dash panel insert
   86 Earth connection -1-, in rear wiring harness
   269 Earth connection (sender earth) -1-, in dash panel wiring harness
   A76 Connection (diagnosis wire K), in dash panel wiring harness
*Models with front-wheel drive
**Models with four-wheel drive
***Wiring in fuel tank
#Sender earth output

Wiring Diagram AUDI A6 2003 - Dash panel insert



Wiring Diagram  AUDI A6 2003 - Dash panel insert https://portal-diagnostov.com/license.html
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F1Oil pressure switch
F66Coolant shortage indicator switch
G3Coolant temperature gauge
G5Rev. counter
G21Speedometer
G22Speedometer sender (Hall sender, on gearbox)
J285Control unit with display in dash panel insert
K3Oil pressure warning lamp
K28Coolant temperature/coolant shortage warning lamp
K83Fault warning lamp for self-diagnosis/exhaust emissions
K132Electronic power control fault lamp
T10p10-pin connector, black, connector point, electronics box, plenum chamber
T3232-pin connector, blue, on dash panel insert
T32a32-pin connector, green, on dash panel insert
   131 Earth connection -2-, in engine compartment wiring harness
   A108 Connection (speed signal), in dash panel wiring harness
CAN bus (data wire)