Wiring Diagram AUDI A4 2003 - Battery - starter - alternator - starter inhibitor relay - clutch pedal switch
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) |
T1d | Single connector, black, engine compartment, left |
T2 | 2-pin connector, black, engine compartment, right |
T17e | 17-pin connector, white, connector point, 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 |
* | Only applies to models with manual gearbox |
** | See applicable Current Flow Diagram: Automatic gearbox (multitronic 01J or AG5) |
Wiring Diagram AUDI A4 2003 - Ignition/starter switch - fuel pump relay - fuses
D | Ignition/starter switch |
J17 | Fuel pump relay |
S5 | Fuse in fuse box/relay plate |
S7 | Fuse in fuse box/relay plate |
S9 | Fuse in fuse box/relay plate |
S14 | Fuse in fuse box/relay plate |
S228 | Fuse in fuse box |
S232 | Fuse in fuse box |
S234 | Fuse in fuse box |
S243 | Fuse in fuse box |
T10a | 10-pin connector, brown, connector point, 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 |
* | Only applies to models with manual gearbox |
Wiring Diagram AUDI A4 2003 - Motronic control unit - Motronic current supply relay
J217 | Automatic gearbox control unit |
J220 | Motronic control unit |
J271 | Motronic current supply relay |
S4 | Fuse in fuse box/relay plate |
S229 | Fuse in fuse box |
S282 | Engine electronics fuse |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
T17e | 17-pin connector, white, connector point, electronics box, plenum chamber |
12 | Earth point, in engine compartment, left |
83 | Earth connection -1-, in front right wiring harness |
D50 | Positive (+) connection (30), in engine compartment wiring harness |
D52 | Positive (+) connection (15a), in engine compartment wiring harness |
D173 | Connection (87), in engine wiring harness |
* | Only applies to models with automatic gearbox (multitronic 01J) |
** | Only applies to models with five-speed automatic gearbox (AG5) |
Wiring Diagram AUDI A4 2003 - Motronic control unit - air mass meter - coolant temperature sender - radiator outlet - injectors - fuel system diagnostic pump
G70 | Air mass meter |
G83 | Coolant temperature sender - radiator outlet |
J220 | Motronic control unit |
N30 | Injector, cylinder 1 |
N31 | Injector, cylinder 2 |
N32 | Injector, cylinder 3 |
N33 | Injector, cylinder 4 |
T10a | 10-pin connector, brown, connector point, electronics box, plenum chamber |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
V144 | Fuel system diagnostic pump |
D22 | Connection (via fuse 234), in front right wiring harness |
D95 | Connection (injectors), in engine compartment wiring harness |
Wiring Diagram AUDI A4 2003 - Motronic control unit - coolant temperature senders - charge air pressure sender - by-pass air cut-off valve - intake air temperature sender - charge pressure control solenoid valve
F66 | Coolant shortage indicator switch |
F265 | Map-controlled engine cooling thermostat |
G2 | Coolant temperature sender |
G31 | Charge air pressure sender |
G42 | Intake air temperature sender |
G62 | Coolant temperature sender |
J220 | Motronic control unit |
J293 | Radiator fan control unit |
N75 | Charge pressure control solenoid valve |
N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
N112 | Secondary air inlet valve |
N249 | Turbocharger divert air valve |
T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
T10d | 10-pin connector, grey, connector point, A pillar, left |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
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 |
D22 | Connection (via fuse 234), in front right wiring harness |
Wiring Diagram AUDI A4 2003 - Motronic control unit - engine speed sender - knock sensor I - knock sensor II
G28 | Engine speed sender |
G61 | Knock sensor I |
G66 | Knock sensor II |
J220 | Motronic control unit |
T3 | 3-pin connector, grey, on engine block |
T3a | 3-pin connector, green, on engine block |
T3b | 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 - Motronic control unit - inlet camshaft timing adjustment valve -1- - secondary air pump - Hall sender - vacuum pump for brakes
G40 | Hall sender |
G294 | Brake servo pressure sensor |
J217 | Automatic gearbox control unit |
J220 | Motronic control unit |
J299 | Secondary air pump relay |
J569 | Brake servo relay |
N205 | Inlet camshaft timing adjustment valve -1- |
S130 | Secondary air pump fuse |
T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
V101 | Secondary air pump motor |
V192 | Vacuum pump for brakes |
12 | Earth point, in engine compartment, left |
83 | Earth connection -1-, in front right wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
D141 | Connection (5V), in engine wiring harness |
* | Only applies to models with automatic gearbox (AG5 or multitronic 01J) |
** | Only applies to models with automatic gearbox (multitronic 01J), up to model year 2003 |
*** | Only applies to models with automatic gearbox (multitronic 01J), from model year 2004 |
Wiring Diagram AUDI A4 2003 - Motronic control unit - accelerator pedal position senders - throttle valve module
F | Brake light switch |
F36 | Clutch pedal switch |
G79 | Accelerator pedal position sender |
G185 | Accelerator pedal position sender -2- |
J220 | Motronic control unit |
J338 | Throttle valve module |
J527 | Steering column electronics control unit |
T16a | 16-pin connector, black, on steering column electronics control unit |
T17e | 17-pin connector, white, connector point, electronics box, plenum chamber |
A18 | Connection (54), in dash panel wiring harness |
A20 | Connection (15a), in dash panel wiring harness |
A154 | Connection (brake pedal switch), in dash panel wiring harness |
* | Only applies to models with manual gearbox |
Wiring Diagram AUDI A4 2003 - Motronic control unit - lambda probes
G39 | Lambda probe |
G130 | Lambda probe downstream of catalytic converter |
J220 | Motronic control unit |
J234 | Airbag control unit |
T4 | 4-pin connector, brown, connector point, lambda probe (bulkhead) |
T6 | 6-pin connector, black, connector point, lambda probe (bulkhead) |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
Z19 | Lambda probe heater |
Z29 | Lambda probe 1 heater, downstream of catalytic converter |
200 | Earth connection (screening), in engine compartment wiring harness |
A125 | Connection (crash signal), in dash panel wiring harness |
* | As of model year 2003 no longer fitted (phased-in modification) |
Wiring Diagram AUDI A4 2003 - Motronic control unit - ignition coils
J217 | Automatic gearbox control unit |
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 |
N292 | Ignition coil 4 with output stage |
P | Spark plug connector |
Q | Spark plugs |
T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
T10a | 10-pin connector, brown, connector point, electronics box, plenum chamber |
T16 | 16-pin connector, black, diagnostic connector |
T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
18 | Earth point, on cylinder block |
83 | Earth connection -1-, in front right 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 |
* | Only applies to models with automatic gearbox (multitronic 01J), up to model year 2003 |
** | Only applies to models with five-speed automatic gearbox (AG5) |
*** | Only applies to models with automatic gearbox (multitronic 01J), from model year 2004 |
• | Data bus wire (CAN bus) |
Wiring Diagram AUDI A4 2003 - Control unit with display in dash panel insert - oil pressure switch - oil level/oil temperature sender - fuel pump - 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/oil temperature sender |
J285 | Control unit with display in dash panel insert |
K2 | Alternator warning lamp |
T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
T10a | 10-pin connector, brown, connector point, 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 |
* | Only models with four-wheel drive |
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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