Wiring Diagram VW JETTA 2003 - Starter - Alternator
A | Battery |
B | Starter |
C | Alternator |
C1 | Voltage regulator |
F194 | Clutch pedal switch for engine start |
J59 | X-contact relief relay |
J207 | Starter inhibitor relay |
S162 | Fuse 1 (30), in battery fuse holder |
S163 | Fuse 2 (30), in battery fuse holder |
S176 | Fuse 4 (30), in battery fuse holder |
S177 | Fuse 5 (30), in battery fuse holder |
T2e | 2-pin connector |
T4g | 4-pin connector |
T6k | 6-pin connector |
81 | Earth connection 1, in dash panel wiring harness |
240 | Earth connection 4, in headlight wiring harness |
500 | Threaded connection 1 (30), on relay plate |
502 | Threaded connection 1 (30a) on relay plate |
B239 | Positive connection 1 (50), in interior wiring harness |
* | Only models with manual gearbox |
*2 | Only models with automatic gearbox |
Wiring Diagram VW JETTA 2003 - Main relay
D | Ignition/starter switch |
J226 | Starter inhibitor and reversing light relay |
J271 | Main relay |
S229 | Fuse 29 in fuse holder |
S237 | Fuse 37 in fuse holder |
T6d | 6-pin connector |
240 | Earth connection 4, in headlight wiring harness |
501 | Threaded connection 2 (30), on relay plate |
A2 | Positive connection (15), in dash panel wiring harness |
A32 | Positive connection (30), in dash panel wiring harness |
A98 | Positive connection 4 (30), in dash panel wiring harness |
D78 | Positive connection 1 (30a), in engine compartment wiring harness |
* | Only models with automatic gearbox |
Wiring Diagram VW JETTA 2003 - Motronic 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 |
T2 | 2-pin connector |
T6a | 6-pin connector |
T6d | 6-pin connector |
T10d | 10-pin connector |
T14a | 14-pin connector |
T121 | 121-pin connector |
85 | Earth connection 1, in engine compartment wiring harness |
608 | Earth point, central in plenum chamber |
A104 | Positive connection 2 (15), in dash panel wiring harness |
D78 | Positive connection 1 (30a), in engine compartment wiring harness |
D181 | Connection 2 (87a) in engine compartment wiring harness |
Wiring Diagram VW JETTA 2003 - Motronic control unit
J104 | ABS control unit |
J217 | Automatic gearbox control unit |
J220 | Motronic control unit |
T10w | 10-pin connector |
T47a | 47-pin connector |
T68 | 68-pin connector |
T121 | 121-pin connector |
609 | Earth point, on right in plenum chamber |
A121 | Connection (high bus), in dash panel wiring harness |
A122 | Connection (low bus), in dash panel wiring harness |
* | Only models with automatic gearbox |
Wiring Diagram VW JETTA 2003 - Motronic control unit
G40 | Hall sender |
G79 | Accelerator position sender |
G185 | Accelerator position sender 2 |
J220 | Motronic control unit |
T6b | 6-pin connector |
T10h | 10-pin connector |
T10w | 10-pin connector |
T121 | 121-pin connector |
220 | Earth connection (sender earth), in engine wiring harness |
Wiring Diagram VW JETTA 2003 - Throttle valve drive for electric throttle - Motronic control unit - Fuel system diagnostic pump
G2 | Coolant temperature display sender |
G62 | Coolant temperature sender |
G186 | Throttle valve drive for electric throttle |
G187 | Throttle valve drive angle sender 1 for electric throttle |
G188 | Throttle valve drive angle sender 2 for electric throttle |
J220 | Motronic control unit |
J338 | Throttle valve module |
T6a | 6-pin connector |
T10h | 10-pin connector |
T14a | 14-pin connector |
T121 | 121-pin connector |
V144 | Fuel system diagnostic pump |
220 | Earth connection (sender earth), in engine wiring harness |
* | According to equipment |
Wiring Diagram VW JETTA 2003 - Engine speed sender - Knock sensor 1 - Knock sensor 2 - Motronic control unit
G28 | Engine speed sender |
G61 | Knock sensor 1 |
G66 | Knock sensor 2 |
J220 | Motronic control unit |
T3f | 3-pin connector |
T10w | 10-pin connector |
T121 | 121-pin connector |
139 | Earth connection (sender earth), in Motronic wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
* | Connection for air conditioning system |
*2 | Connection for radiator fan control unit |
*3 | Only models with automatic gearbox |
*4 | Only models with manual gearbox |
Wiring Diagram VW JETTA 2003 - Motronic control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4 - Heater element for crankcase breather
J220 | Motronic control unit |
N30 | Injector, cylinder 1 |
N31 | Injector, cylinder 2 |
N32 | Injector, cylinder 3 |
N33 | Injector, cylinder 4 |
N79 | Heater element for crankcase breather |
S232 | Fuse 32 in fuse holder |
T14a | 14-pin connector |
T121 | 121-pin connector |
131 | Earth connection 2, in engine compartment wiring harness |
608 | Earth point, central in plenum chamber |
A101 | Connection 3 (87) in dash panel wiring harness |
D95 | Connection (injectors), in engine compartment wiring harness |
* | Only models with crankcase breather heater element |
Wiring Diagram VW JETTA 2003 - Lambda probe after catalytic converter - Motronic control unit - Activated charcoal filter solenoid valve 1
G39 | Lambda probe |
G130 | Lambda probe after catalytic converter |
J220 | Motronic control unit |
N80 | Activated charcoal filter solenoid valve 1 |
T4f | 4-pin connector |
T6c | 6-pin connector |
T121 | 121-pin connector |
E7 | Connection (87a), in Motronic wiring harness |
Wiring Diagram VW JETTA 2003 - Centre Lambda probe for bank 1 catalytic converter - Motronic control unit - Vacuum pump for brakes
G235 | Exhaust gas temperature sender 1 |
G465 | Centre Lambda probe for bank 1 catalytic converter |
J220 | Motronic control unit |
N205 | Camshaft control valve 1 |
S231 | Fuse 31 in fuse holder |
S283 | Brake vacuum pump fuse |
T2 | 2-pin connector |
T4g | 4-pin connector |
T6k | 6-pin connector |
T10 | 10-pin connector |
T121 | 121-pin connector |
V192 | Vacuum pump for brakes |
E7 | Connection (87a), in Motronic wiring harness |
* | Only models with automatic gearbox |
Wiring Diagram VW JETTA 2003 - Brake light switch - Clutch pedal switch - Brake pedal switch - Motronic control unit - Secondary air pump relay - Secondary air pump motor
F | Brake light switch |
F36 | Clutch pedal switch |
F47 | Brake pedal switch |
J220 | Motronic control unit |
J299 | Secondary air pump relay |
S13 | Fuse 13 in fuse holder |
T4q | 4-pin connector |
T10e | 10-pin connector |
T10w | 10-pin connector |
T121 | 121-pin connector |
V101 | Secondary air pump motor |
A18 | Connection (54), in dash panel wiring harness |
A20 | Positive connection (15a), in dash panel wiring harness |
D103 | Connection 3 in engine compartment wiring harness |
E7 | Connection (87a), in Motronic wiring harness |
E30 | Connection (87a), in engine wiring harness |
* | Only models with manual gearbox |
Wiring Diagram VW JETTA 2003 - Cruise control system switch - Cruise control system (CCS) SET button - Air mass meter - Fuel pump relay - Motronic control unit
E45 | Cruise control system switch |
E227 | Cruise control system (CCS) SET button |
G70 | Air mass meter |
J17 | Fuel pump relay |
J220 | Motronic control unit |
T6k | 6-pin connector |
T10 | 10-pin connector |
T10e | 10-pin connector |
T10s | 10-pin connector |
T121 | 121-pin connector |
A20 | Positive connection (15a), in dash panel wiring harness |
A27 | Connection (speed signal), in dash panel wiring harness |
E30 | Connection (87a), in engine wiring harness |
* | Only models with multifunction steering wheel |
*2 | see applicable current flow diagram for multifunction steering wheel |
*3 | Only models with cruise control system (CCS) |
Wiring Diagram VW JETTA 2003 - Fuel gauge sender - Fuel system pressurisation pump - Coolant shortage indicator sender
G | Fuel gauge sender |
G6 | Fuel system pressurisation pump |
G32 | Coolant shortage indicator sender |
S228 | Fuse 28 in fuse holder |
S234 | Fuse 34 in fuse holder |
S243 | Fuse 43 in fuse holder |
T6e | 6-pin connector |
T6k | 6-pin connector |
T14a | 14-pin connector |
42 | Earth point, next to steering column |
49 | Earth point, near ... |
135 | Earth connection 2, in dash panel wiring harness |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
504 | Threaded connection 1 (87), on relay plate |
A27 | Connection (speed signal), in dash panel wiring harness |
A99 | Connection 1 (87) in dash panel wiring harness |
A100 | Connection 2 (87) in dash panel wiring harness |
A151 | Connection 4 (87) in dash panel wiring harness |
E30 | Connection (87a), in engine wiring harness |
* | Only models with crankcase breather heater element |
*2 | Only models with automatic gearbox |
*3 | Only models with no multifunction display |
Wiring Diagram VW JETTA 2003 - Oil pressure switch - Speedometer sender - Control unit in dash panel insert - Coolant temperature and coolant shortage warning lamp
F1 | Oil pressure switch |
G22 | Speedometer sender |
J285 | Control unit in dash panel insert |
K3 | Oil pressure warning lamp |
K28 | Coolant temperature and coolant shortage warning lamp |
S5 | Fuse 5 in fuse holder |
S7 | Fuse 7 in fuse holder |
T14a | 14-pin connector |
T32 | 32-pin connector |
A27 | Connection (speed signal), in dash panel wiring harness |
B163 | Positive connection 1 (15), in interior wiring harness |
Wiring Diagram VW JETTA 2003 - Fuel gauge - Coolant temperature gauge - Rev. counter - Speedometer - Control unit in dash panel insert - Data bus diagnostic interface - Alternator warning lamp - Reserve fuel warning lamp
G1 | Fuel gauge |
G3 | Coolant temperature gauge |
G5 | Rev. counter |
G21 | Speedometer |
H3 | Buzzer and gong |
J285 | Control unit in dash panel insert |
J533 | Data bus diagnostic interface |
K2 | Alternator warning lamp |
K105 | Reserve fuel warning lamp |
T32 | 32-pin connector |
T32a | 32-pin connector |
A13 | Connection (door contact switch), in dash panel wiring harness |
A27 | Connection (speed signal), in dash panel wiring harness |
Wiring Diagram VW JETTA 2003 - Multifunction indicator - Control unit in dash panel insert - Cruise control system warning lamp - Exhaust emissions warning lamp - Electronic power control fault lamp
E86 | Multifunction display call-up button |
E109 | Multifunction display memory switch |
G17 | Ambient temperature sensor |
J119 | Multifunction indicator |
J285 | Control unit in dash panel insert |
K31 | Cruise control system warning lamp |
K83 | Exhaust emissions warning lamp |
K132 | Electronic power control fault lamp |
T6e | 6-pin connector |
T16 | 16-pin connector |
T32 | 32-pin connector |
T32a | 32-pin connector |
A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
* | Only models with no multifunction display |