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AUDI A3 2003 – 1.9 litre diesel engine (unit injector), 74 kW, 4-cylinder, engine code AXR . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2003 - Battery - starter - alternator - fuses



Wiring Diagram  AUDI A3 2003 - Battery - starter - alternator - fuses https://portal-diagnostov.com/license.html
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ABattery
BStarter
CAlternator
C1Voltage regulator
DIgnition/starter switch
S131Fuse 1
S132Fuse 2
S133Fuse 3
S134Fuse 4
S138Fuse 5
S162Fuse -1- (30), in fuse box/battery
S163Fuse -2- (30), in fuse box/battery
S164Fuse -3- (30), in fuse box/battery
T2f2-pin connector, alternator, in engine compartment, left
T3e3-pin connector, black, on main fuse box
T4b4-pin connector, in engine compartment, left
T6m6-pin connector, brown, in plenum chamber
   2 Earth strap, gearbox - body
   12 Earth point, in engine compartment, left
   156 Earth connection, in diesel direct injection wiring harness
*Models with air conditioner
**Models without air conditioner

Wiring Diagram AUDI A3 2003 - Fuses



Wiring Diagram  AUDI A3 2003 - Fuses https://portal-diagnostov.com/license.html
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DIgnition/starter switch
S5Fuse in fuse box/relay plate
S7Fuse in fuse box/relay plate
S11Fuse in fuse box/relay plate
S13Fuse in fuse box/relay plate
S16Fuse in fuse box/relay plate
S228Fuse in fuse box
S229Fuse in fuse box
S232Fuse in fuse box
S237Fuse in fuse box
S234Fuse in fuse box
S243Fuse in fuse box
T6m6-pin connector, brown, in plenum chamber
   A2 Positive (+) connection (15), in dash panel wiring harness
   A101 Connection -3- (87), in dash panel wiring harness
   B135 Connection -1- (15a), in interior wiring harness
   B138 Positive (+) connection (X), in interior wiring harness
   B146 Positive (+) connection -1- (87), in interior wiring harness
*Only applies to models with four-wheel drive

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - diesel direct injection system relay - relay for glow plugs - glow plugs - (engine) - coolant heating elements



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - diesel direct injection system relay - relay for glow plugs - glow plugs - (engine) - coolant heating elements https://portal-diagnostov.com/license.html
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J52Glow plug relay
J248Diesel direct injection system control unit
J322Diesel direct injection system relay
J359Low heat output relay
J360High heat output relay
Q6Glow plugs - (engine)
Q7Coolant heating elements
T2n2-pin connector, wiring duct, in engine compartment, left
T6m6-pin connector, brown, in plenum chamber
T10g10-pin connector, blue, in plenum chamber
   156 Earth connection, in diesel direct injection wiring harness
   A98 Positive (+) connection -4- (30), in dash panel wiring harness
   B156 Positive (+) connection (30a), in interior wiring harness
   D102 Connection -2-, in engine compartment wiring harness
   F32 Connection (coolant heating elements), in diesel direct injection system wiring harness
   D78 Positive (+) connection -1- (30a), in engine compartment wiring harness
*Only applies to models with heater elements (manual gearbox)

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - air mass meter - intake manifold flap motor - intake manifold flap change-over valve - exhaust gas recirculation valve -2-



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - air mass meter - intake manifold flap motor - intake manifold flap change-over valve - exhaust gas recirculation valve -2- https://portal-diagnostov.com/license.html
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G70Air mass meter
J248Diesel direct injection system control unit
N213Exhaust gas recirculation valve -2-
N239Intake manifold flap change-over valve
T6m6-pin connector, brown, in plenum chamber
T1010-pin connector, white, in plenum chamber
T10c10-pin connector, black, in engine compartment, left
T1414-pin connector, in engine compartment, left
V157Intake manifold flap motor
   156 Earth connection, in diesel direct injection wiring harness
   A15 Positive (+) connection (15), in dash panel wiring harness
   D101 Connection -1-, in engine compartment wiring harness
*Only applies to models with engine code ASZ
**Only applies to models with heater elements
***Only applies to models without heater elements
****Only applies to models with engine code AXR

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - Hall sender - exhaust gas recirculation valve - charge pressure control solenoid valve - engine speed sender



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - Hall sender - exhaust gas recirculation valve - charge pressure control solenoid valve - engine speed sender https://portal-diagnostov.com/license.html
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G28Engine speed sender
G40Hall sender
J248Diesel direct injection system control unit
N18Exhaust gas recirculation valve
N75Charge pressure control solenoid valve
T3n3-pin connector, grey, engine speed sender, in engine compartment
T6m6-pin connector, brown, in plenum chamber
T10c10-pin connector, black, in engine compartment, left
T1414-pin connector, in engine compartment, left
   A100 Connection -2- (87), in dash panel wiring harness
   F27 Connection (screening), in diesel direct injection wiring harness
*Only applies to models with engine code ASZ

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - intake manifold pressure sender - intake manifold temperature sender - coolant temperature senders - fuel temperature sender



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - intake manifold pressure sender - intake manifold temperature sender - coolant temperature senders - fuel temperature sender https://portal-diagnostov.com/license.html
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G2Coolant temperature sender
G62Coolant temperature sender
G71Intake manifold pressure sender
G72Intake manifold temperature sender
G81Fuel temperature sender
J248Diesel direct injection system control unit
T10x10-pin connector, orange, in plenum chamber
T1414-pin connector, in engine compartment, left
   269 Earth connection (sender earth) -1-, in dash panel wiring harness
   A45 Connection (engine speed signal), in dash panel wiring harness

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - fuel pump relay - unit injector solenoid valves - accelerator pedal position sender



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - fuel pump relay - unit injector solenoid valves - accelerator pedal position sender https://portal-diagnostov.com/license.html
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F8Kick-down switch
F60Idling switch
G79Accelerator pedal position sender
J17Fuel pump relay
J234Airbag control unit
J248Diesel direct injection system control unit
N240Unit injector solenoid valve, No. 1 cyl.
N241Unit injector solenoid valve, No. 2 cyl.
N242Unit injector solenoid valve, No. 3 cyl.
N243Unit injector solenoid valve, No. 4 cyl.
T8h8-pin connector, in engine compartment
T1010-pin connector, white, in plenum chamber
T10g10-pin connector, blue, in plenum chamber
   A125 Connection (crash signal), in dash panel wiring harness
   B147 Positive (+) connection -2- (87), in interior wiring harness

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - heater element (crankcase breather) - cruise control system switch - brake pedal switch - clutch pedal switch



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - heater element (crankcase breather) - cruise control system switch - brake pedal switch - clutch pedal switch https://portal-diagnostov.com/license.html
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E45Cruise control system switch
FBrake light switch
F36Clutch pedal switch
J248Diesel direct injection system control unit
N79Heater element (crankcase breather)
T6m6-pin connector, brown, in plenum chamber
T1010-pin connector, white, in plenum chamber
T10c10-pin connector, black, in engine compartment, left
T10e10-pin connector, black, in plenum chamber
T10x10-pin connector, orange, in plenum chamber
   156 Earth connection, in diesel direct injection wiring harness
   B148 Positive (+) connection -3- (87), in interior wiring harness
   B185 Connection -2- (54), in interior wiring harness
*Only applies to models with cruise control system
**Only models with manual gearbox
***Only applies to models with heater elements

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - radiator fan - automatic gearbox control unit - control and display unit for air conditioner/Climatronic



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - radiator fan - automatic gearbox control unit - control and display unit for air conditioner/Climatronic https://portal-diagnostov.com/license.html
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E87Control and display unit for air conditioner/Climatronic
F18Radiator fan thermo-switch
F54Radiator fan thermo-switch
J217Automatic gearbox control unit
J248Diesel direct injection system control unit
J397Radiator fan run-on relay
T1010-pin connector, white, in plenum chamber
T10x10-pin connector, orange, in plenum chamber
V7Radiator fan
   11 Earth point, in battery box
   A68 Connection (30, air conditioner), in dash panel wiring harness
   A108 Connection (speed signal), in dash panel wiring harness
   L26 Connection (radiator fan), in engine compartment - Climatronic wiring harness
*Only models with automatic gearbox
**Only models with manual gearbox
***Does not apply to models with four-wheel drive
****Only applies to models with air conditioner

Wiring Diagram AUDI A3 2003 - Diesel direct injection system control unit - radiator fan control unit



Wiring Diagram  AUDI A3 2003 - Diesel direct injection system control unit - radiator fan control unit https://portal-diagnostov.com/license.html
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F18Radiator fan thermo-switch
F54Radiator fan thermo-switch
J248Diesel direct injection system control unit
J293Radiator fan control unit
T4p4-pin connector, on radiator fan control unit
T6q6-pin connector, on radiator fan control unit
T1010-pin connector, white, in plenum chamber
V7Radiator fan
V35Radiator fan, right
   11 Earth point, in battery box
   188 Earth connection -3-, in air conditioner wiring harness
   L26 Connection (radiator fan), in engine compartment - Climatronic wiring harness
   L43 Connection (radiator fan), in air conditioner/radiator fan wiring harness
*Only applies to models with four-wheel drive

Wiring Diagram AUDI A3 2003 - Combi-processor in dash panel insert - oil pressure switch - fuel gauge sender - diagnostic connector



Wiring Diagram  AUDI A3 2003 - Combi-processor in dash panel insert - oil pressure switch - fuel gauge sender - diagnostic connector https://portal-diagnostov.com/license.html
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F1Oil pressure switch
GFuel gauge sender
G6Fuel pump (pre-supply pump)
J218Combi-processor in dash panel insert
J533Data bus diagnostic interface
T1414-pin connector, in engine compartment, left
T1616-pin connector, black, centre console compartment (diagnostic connector)
T3232-pin connector, blue, on dash panel insert
T32a32-pin connector, green, on dash panel insert
   269 Earth connection (sender earth) -1-, in dash panel wiring harness
   277 Earth connection -3-, in interior wiring harness
   A76 Connection (diagnosis wire K), in dash panel wiring harness
   A80 Connection -1- (X), in dash panel wiring harness
   A121 Connection (high bus), in dash panel wiring harness
   A122 Connection (low bus), in dash panel wiring harness

Wiring Diagram AUDI A3 2003 - Combi-processor in dash panel insert - speedometer sender (Hall sender - on gearbox) - oil level/oil temperature sender



Wiring Diagram  AUDI A3 2003 - Combi-processor in dash panel insert - speedometer sender (Hall sender - on gearbox) - oil level/oil temperature sender https://portal-diagnostov.com/license.html
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G22Speedometer sender (Hall sender, on gearbox)
G266Oil level/oil temperature sender
J218Combi-processor in dash panel insert
K2Alternator warning lamp
K29Glow period warning lamp
T1414-pin connector, in engine compartment, left
T3232-pin connector, blue, on dash panel insert
T32a32-pin connector, green, on dash panel insert
   10 Earth point, in plenum chamber
   281 Earth connection -1-, in engine wiring harness
   A23 Connection (30al), in dash panel wiring harness
   B149 Positive (+) connection -2- (15a), in interior wiring harness
   B178 Connection (speed signal), in interior wiring harness
*Only models with manual gearbox
**Only models with automatic gearbox