Wiring Diagram AUDI A4 2003 - 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 |
11 | Earth point, in battery box |
238 | Earth connection 1, in interior wiring harness |
500 | Screw connection 1 (30), on relay plate |
* | for models with manual gearbox only |
** | see applicable Current Flow Diagram for automatic gearbox (multitronic 01J or AG5) |
Wiring Diagram AUDI A4 2003 - 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 |
501 | Screw connection 2 (30), on relay plate |
A2 | Positive connection (15), in dash panel wiring harness |
A32 | Positive connection (30), in dash panel wiring harness |
A52 | Positive connection 2 (30), in dash panel wiring harness |
A57 | Positive connection 3 (30), in dash panel wiring harness |
A98 | Positive connection 4 (30), in dash panel wiring harness |
A99 | Connection 1 (87), in dash panel wiring harness |
A152 | Connection 5 (87), in dash panel wiring harness |
* | for models with manual gearbox only |
Wiring Diagram AUDI A4 2003 - 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 |
12 | Earth point, on left in engine compartment |
83 | Earth connection 1, in front right wiring harness |
D50 | Positive connection (30), in engine compartment wiring harness |
D173 | Connection (87), in engine wiring harness |
* | for models with automatic gearbox (AG5) only |
** | for models with automatic gearbox (multitronic 01J) only |
Wiring Diagram AUDI A4 2003 - 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 |
D95 | Connection (injectors), in engine compartment wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
D22 | Connection (via fuse 234), in front right wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
83 | Earth connection 1, in front right wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
327 | Earth connection (sender earth), in engine compartment wiring harness |
E7 | Positive connection (87a), in Motronic wiring harness |
* | for countries with hot climate only |
Wiring Diagram AUDI A4 2003 - 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 |
104 | Earth connection in front right wiring harness - sensor earth - |
220 | Earth connection (sender earth), in engine wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
220 | Earth connection (sender earth), in engine wiring harness |
316 | Earth connection (sender earth 2), in engine wiring harness |
D141 | Connection (5V), in engine wiring harness |
* | 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 |
Wiring Diagram AUDI A4 2003 - 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 |
220 | Earth connection (sender earth), in engine wiring harness |
316 | Earth connection (sender earth 2), in engine wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
220 | Earth connection (sender earth), in engine wiring harness |
316 | Earth connection (sender earth 2), in engine wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
12 | Earth point, on left in engine compartment |
83 | Earth connection 1, in front right wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
316 | Earth connection (sender earth 2), in engine wiring harness |
* | for models with automatic gearbox (multitronic 01J or AG5) only |
Wiring Diagram AUDI A4 2003 - 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 |
A18 | Connection (54), in dash panel wiring harness |
A20 | Connection (15a), in dash panel wiring harness |
A125 | Connection (crash signal), in dash panel wiring harness |
A154 | Connection (brake pedal switch), in dash panel wiring harness |
* | for models with manual gearbox only |
** | is dropped, from model year 2003 (phased-in modification) |
Wiring Diagram AUDI A4 2003 - 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 |
18 | Earth point, on engine block |
83 | Earth connection 1, in front right wiring harness |
343 | Earth connection (ignition coil), in injection system wiring harness |
D23 | Connection (via fuse 229), in front right wiring harness |
Wiring Diagram AUDI A4 2003 - 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 |
83 | Earth connection 1, in front right wiring harness |
343 | Earth connection (ignition coil), in injection system wiring harness |
A76 | Connection (diagnosis wire K), in dash panel wiring harness |
A121 | Connection (high bus), in dash panel wiring harness |
A122 | Connection (low bus), in dash panel wiring harness |
D23 | Connection (via fuse 229), in front right wiring harness |
* | 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 |
● | CAN bus (data bus) |
Wiring Diagram AUDI A4 2003 - 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 |
83 | Earth connection 1, in front right wiring harness |
249 | Earth connection 2, in interior wiring harness |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
A17 | Connection (61), in dash panel wiring harness |
A74 | Connection (15a, fuse 5), in dash panel wiring harness |
* | for models with four-wheel drive only |
AUDI A4 2003 Overview of relay
1 - | Relay carrier (3-pin) |
q | Components: -J359-, -J360-, -J608- |
q | Location → page 803/4 |
2 - | Relay carrier (9-pin) with onboard supply control unit |
q | Components: -J4-, -J9-, -J17-, -J53-, -J59-, -J236-, -J569-, -J695- |
q | Location up to July 2004 → page 803/5 |
q | Location from August 2004 → page 803/6 |
q | Location component -J569- for engine code BNS → page 803/19 |
q | Location component -J17- for some engine variants ⇒ Item → 5 , page → 803/2 |
3 - | Relay carrier (4-pin) with screw connection |
q | Components: -J662-, -J663-, -J610- |
q | Location → page 803/7 |
4 - | Relay carrier for special vehicles |
q | Components: -J85-, -J182-, -J330-, -J408-, -J430-, -J461-, -J462-, -J463-, -J608- |
q | Location → page 803/22 |
Audi A4 | Fitting Locations | No. 803 / 2 |
5 - | Relay carrier (4-pin) |
q | Components: -J17-, -J52-, -J151-, -J179-, -J207-, -J271-, -J299-, -J317-, -J363-, -J434-, -J496-, -J569-, -J757- |
q | Location for petrol engines, up to July 2004 → page 803/8 |
q | Location for diesel engines, up to July 2004 → page 803/9 |
q | Location for engine codes BKE, BRB, BNA, BLB, BRC, BPW, BVG, BVF, BRF, BRE, BVA, BRD → page 803/10 |
q | Location for engine codes BSG, BPP, BTP, BKN, ASB → page 803/11 |
q | Location for engine codes BGB, BPG, BWE, BWT, BUL, BPJ, BYK → page 803/12 |
q | Location for engine code ALZ → page 803/13 |
q | Location for engine code ALT → page 803/14 |
q | Location for engine code BDG → page 803/15 |
q | Location for engine codes BFB, BBK, BHF → page 803/16 |
q | Location for engine code AWA → page 803/17 |
Audi A4 | Fitting Locations | No. 803 / 3 |
t | Location for engine codes AUK, BKH → page 803/18 |
t | Location for engine code BNS → page 803/19 |
t | Location for engine code BBJ, with manual gearbox or multitronic → page 803/20 |
t | Location for engine code BBJ with AG5 → page 803/21 |
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