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Wiring Diagram VW JETTA 2009 - Battery - Starter - Alternator - Onboard supply control unit
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J519 | Onboard supply control unit |
| SA1 | Fuse 1 in fuse holder A |
| SA5 | Fuse 5 in fuse holder A |
| T2 | 2-pin connector |
| T3ba | 3-pin connector |
| T4t | 4-pin connector, near starter |
| T94 | 94-pin connector |
| U11 | Interior socket, 230 V, 110 V |
| 1 | Earth strap, battery - body |
| 12 | Earth point, on left in engine compartment |
| 507 | Threaded connection (30), on battery fuse holder |
| 652 | Earth point, engine and gearbox earth |
| A17 | Connection (61), in dash panel wiring harness |
| B169 | Positive connection 1 (30), in interior wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Steering column electronics control unit
| D | Ignition/starter switch |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| T20d | 20-pin connector |
Wiring Diagram VW JETTA 2009 - Main relay - Steering column electronics control unit - Fuse holder B
| J271 | Main relay |
| J527 | Steering column electronics control unit |
| SB | Fuse holder B |
| SB14 | Fuse 14 on fuse holder B |
| SB22 | Fuse 22 on fuse holder B |
| SB23 | Fuse 23 on fuse holder B |
| T14a | 14-pin connector, near battery |
| T20d | 20-pin connector |
| T40 | 40-pin connector |
| D78 | Positive connection 1 (30a), in engine compartment wiring harness |
Wiring Diagram VW JETTA 2009 - Secondary air pump relay - Fuse holder B - Secondary air pump motor
| J299 | Secondary air pump relay |
| SB | Fuse holder B |
| SB13 | Fuse 13 on fuse holder B |
| SB15 | Fuse 15 on fuse holder B |
| SB21 | Fuse 21 on fuse holder B |
| SB24 | Fuse 24 on fuse holder B |
| SB27 | Fuse 27 on fuse holder B |
| T40 | 40-pin connector |
| V101 | Secondary air pump motor |
| 655 | Earth point, on left headlight |
| * | According to equipment |
Wiring Diagram VW JETTA 2009 - Terminal 50 voltage supply relay - Fuse holder B
| J682 | Terminal 50 voltage supply relay |
| SB | Fuse holder B |
| SB6 | Fuse 6 on fuse holder B |
| SB7 | Fuse 7 on fuse holder B |
| SB10 | Fuse 10 on fuse holder B |
| T9b | 9-pin connector |
| T40 | 40-pin connector |
| 402 | Earth connection (interior light), in interior wiring harness |
| A23 | Connection (30al), in dash panel wiring harness |
| A41 | Positive connection (50), in dash panel wiring harness |
Wiring Diagram VW JETTA 2009 - Fuel gauge sender - Fuel system pressurisation pump - Fuel pump relay - Fuel supply relay
| G | Fuel gauge sender |
| G6 | Fuel system pressurisation pump |
| J17 | Fuel pump relay |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J643 | Fuel supply relay |
| SC12 | Fuse 12 on fuse holder C |
| SC27 | Fuse 27 on fuse holder C |
| T3j | 3-pin connector |
| T5b | 5-pin connector |
| T20a | 20-pin connector |
| T20b | 20-pin connector |
| T28 | 28-pin connector |
| T28a | 28-pin connector |
| U5 | 12 V socket |
| 51 | Earth point, on right in luggage compartment |
| 383 | Earth connection 18, in main wiring harness |
| A1 | Positive connection (30a), in dash panel wiring harness |
| B156 | Positive connection (30a), in interior wiring harness |
| B350 | Positive connection 1 (87a) in main wiring harness |
Wiring Diagram VW JETTA 2009 - Engine control unit
| J623 | Engine control unit |
| T94 | 94-pin connector |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 607 | Earth point, on left in plenum chamber |
| D182 | Connection 3 (87a) in engine compartment wiring harness |
Wiring Diagram VW JETTA 2009 - Engine control unit - Ignition coil 1 with output stage - Ignition coil 2 with output stage - Ignition coil 3 with output stage - Ignition coil 4 with output stage - Spark plug connector - Spark plugs
| J623 | Engine 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 |
| T4af | 4-pin connector |
| T4ag | 4-pin connector |
| T4ah | 4-pin connector |
| T4ai | 4-pin connector |
| T14a | 14-pin connector, near battery |
| T60 | 60-pin connector |
| 15 | Earth point, on cylinder head |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 281 | Earth point 1, engine prewiring harness |
| 642 | Earth point for electronically controlled fan |
| D20 | Connection (87a), in front right wiring harness |
Wiring Diagram VW JETTA 2009 - Radiator outlet coolant temperature sender - Throttle valve drive for electric throttle - Throttle valve module - Engine control unit - Ignition coil 5 with output stage - Spark plug connector
| G69 | Throttle valve potentiometer |
| G83 | Radiator outlet coolant temperature sender |
| G186 | Throttle valve drive for electric throttle |
| G188 | Throttle valve drive angle sender 2 for electric throttle |
| J338 | Throttle valve module |
| J623 | Engine control unit |
| N323 | Ignition coil 5 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T4aj | 4-pin connector |
| T6x | 6-pin connector |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 281 | Earth point 1, engine prewiring harness |
| D20 | Connection (87a), in front right wiring harness |
| D108 | Connection 6 in engine compartment wiring harness |
| D109 | Connection 7 in engine compartment wiring harness |
Wiring Diagram VW JETTA 2009 - Hall sender - Knock sensor 1 - Coolant temperature sender - Knock sensor 2 - Engine control unit
| G40 | Hall sender |
| G61 | Knock sensor 1 |
| G62 | Coolant temperature sender |
| G66 | Knock sensor 2 |
| J623 | Engine control unit |
| T60 | 60-pin connector |
| D103 | Connection 3 in engine compartment wiring harness |
Wiring Diagram VW JETTA 2009 - Engine speed sender - Intake manifold pressure sender - Engine control unit - Activated charcoal filter solenoid valve 1 - Camshaft control valve 1
| G28 | Engine speed sender |
| G71 | Intake manifold pressure sender |
| J623 | Engine control unit |
| N80 | Activated charcoal filter solenoid valve 1 |
| N205 | Camshaft control valve 1 |
| T4x | 4-pin connector |
| T14a | 14-pin connector, near battery |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| A99 | Connection 1 (87) in dash panel wiring harness |
| D101 | Connection 1 in engine compartment wiring harness |
| D103 | Connection 3 in engine compartment wiring harness |
| D107 | Connection 5 in engine compartment wiring harness |
| D181 | Connection 2 (87a) in engine compartment wiring harness |
| * | Radiator fan connection |
Wiring Diagram VW JETTA 2009 - Engine control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4 - Injector - cylinder 5
| J623 | Engine control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| T14a | 14-pin connector |
| T60 | 60-pin connector |
| D136 | Positive connection 2 (15a), in engine compartment wiring harness |
Wiring Diagram VW JETTA 2009 - Lambda probe - Accelerator position sender - Accelerator position sender 2 - Engine control unit
| G39 | Lambda probe |
| G79 | Accelerator position sender |
| G185 | Accelerator position sender 2 |
| J623 | Engine control unit |
| T6h | 6-pin connector |
| T6w | 6-pin connector |
| T94 | 94-pin connector |
| * | According to equipment |
Wiring Diagram VW JETTA 2009 - Lambda probe after catalytic converter - Centre Lambda probe for bank 1 catalytic converter - Engine control unit
| G130 | Lambda probe after catalytic converter |
| G465 | Centre Lambda probe for bank 1 catalytic converter |
| J623 | Engine control unit |
| T4ao | 4-pin connector |
| T4v | 4-pin connector |
| T94 | 94-pin connector |
| E30 | Connection (87a), in engine wiring harness |
| * | According to equipment |
Wiring Diagram VW JETTA 2009 - Brake light switch - Brake pedal switch - Clutch position sender - Engine control unit
| F | Brake light switch |
| F47 | Brake pedal switch |
| G476 | Clutch position sender |
| J623 | Engine control unit |
| T4y | 4-pin connector |
| T5m | 5-pin connector |
| T94 | 94-pin connector |
| B131 | Connection (54), in interior wiring harness |
Wiring Diagram VW JETTA 2009 - Sender 1 for secondary air pressure - Engine control unit
| G609 | Sender 1 for secondary air pressure |
| J104 | ABS control unit |
| J623 | Engine control unit |
| T4aw | 4-pin connector |
| T26a | 26-pin connector |
| T47 | 47-pin connector |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
Wiring Diagram VW JETTA 2009 - Engine control unit - Secondary air inlet valve - Fuel system diagnostic pump
| J623 | Engine control unit |
| N112 | Secondary air inlet valve |
| T3d | 3-pin connector |
| T14a | 14-pin connector |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| V144 | Fuel system diagnostic pump |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| E7 | Connection (87a), in Motronic wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Engine control unit - Terminal 15 voltage supply relay 2
| J234 | Airbag control unit |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| J681 | Terminal 15 voltage supply relay 2 |
| SC2 | Fuse 2 on fuse holder C |
| T9i | 9-pin connector |
| T75 | 75-pin connector |
| T94 | 94-pin connector |
| A2 | Positive connection (15), in dash panel wiring harness |
| A199 | Positive connection 4 (15a) in dash panel wiring harness |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
Wiring Diagram VW JETTA 2009 - Control unit in dash panel insert - Onboard supply control unit - Data bus diagnostic interface
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| T20 | 20-pin connector |
| T32c | 32-pin connector |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
Wiring Diagram VW JETTA 2009 - Fuel gauge - Coolant temperature gauge - Rev. counter - Speedometer - Control unit in dash panel insert - Onboard supply control unit - Alternator warning lamp - Coolant temperature and coolant shortage warning lamp - Cruise control system warning lamp - Reserve fuel warning lamp - Electronic power control fault lamp
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| G32 | Coolant shortage indicator sender |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K2 | Alternator warning lamp |
| K28 | Coolant temperature and coolant shortage warning lamp |
| K31 | Cruise control system warning lamp |
| K83 | Exhaust emissions warning lamp |
| K105 | Reserve fuel warning lamp |
| K132 | Electronic power control fault lamp |
| T32c | 32-pin connector |
| 410 | Earth connection 1 (sender earth) in main wiring harness |
Wiring Diagram VW JETTA 2009 - Oil pressure switch - Control unit in dash panel insert - Onboard supply control unit
| F1 | Oil pressure switch |
| H3 | Buzzer and gong |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K3 | Oil pressure warning lamp |
| T14a | 14-pin connector |
| T32c | 32-pin connector |
| 367 | Earth connection 2, in main wiring harness |
| 602 | Earth point, in front left footwell |
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