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Wiring Diagram VW JETTA 2014 - Starter - Alternator - Voltage regulator - Starter inhibitor and reversing light relay - Onboard supply control unit
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J226 | Starter inhibitor and reversing light relay |
| J519 | Onboard supply control unit |
| S163 | Fuse 2 (30), in battery fuse holder |
| S176 | Fuse 4 (30), in battery fuse holder |
| S177 | Fuse 5 (30), in battery fuse holder |
| T10z | 10-pin connector |
| T73b | 73-pin connector |
| TV2 | Terminal 30 wiring junction |
| T8 | 8-pin connector |
| A41 | Positive connection (50), in dash panel wiring harness |
| * | Only models with no automatic gearbox |
Wiring Diagram VW JETTA 2014 - Main relay - Onboard supply control unit
| D | Ignition/starter switch |
| J271 | Main relay |
| J519 | Onboard supply control unit |
| S229 | Fuse 29 in fuse holder |
| S237 | Fuse 37 in fuse holder |
| T8 | 8-pin connector |
| T73a | 73-pin connector |
| 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 |
| D78 | Positive connection 1 (30a), in engine compartment wiring harness |
| D104 | Positive connection 2 (30a), in engine compartment wiring harness |
| * | Only models with no automatic gearbox |
Wiring Diagram VW JETTA 2014 - Coolant temperature sender - Engine control unit - Ignition transformer - Spark plug connector - Spark plugs
| G62 | Coolant temperature sender |
| J623 | Engine control unit |
| N152 | Ignition transformer |
| P | Spark plug connector |
| Q | Spark plugs |
| T2 | 2-pin connector |
| T4 | 4-pin connector |
| T4k | 4-pin connector |
| T80 | 80-pin connector |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D78 | Positive connection 1 (30a), in engine compartment wiring harness |
| D104 | Positive connection 2 (30a), in engine compartment wiring harness |
Wiring Diagram VW JETTA 2014 - Engine speed sender - Hall sender - Throttle valve drive for electric throttle - Throttle valve drive angle sender 1 for electric throttle - Throttle valve drive angle sender 2 for electric throttle - Throttle valve module - Engine control unit
| G28 | Engine speed sender |
| G40 | Hall 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 |
| J338 | Throttle valve module |
| J623 | Engine control unit |
| T3f | 3-pin connector |
| T6h | 6-pin connector |
| T80 | 80-pin connector |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection 1 in engine compartment wiring harness |
Wiring Diagram VW JETTA 2014 - Intake air temperature sender - Knock sensor 1 - Intake manifold pressure sender - Engine control unit - Vacuum pump for brakes
| G42 | Intake air temperature sender |
| G61 | Knock sensor 1 |
| G71 | Intake manifold pressure sender |
| J623 | Engine control unit |
| S235 | Fuse 35 in fuse holder |
| T6aa | 6-pin connector |
| T80 | 80-pin connector |
| V192 | Vacuum pump for brakes |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection 1 in engine compartment wiring harness |
| * | Only models with no automatic gearbox |
Wiring Diagram VW JETTA 2014 - Engine control unit
| G65 | High-pressure sender |
| J104 | ABS control unit |
| J217 | Automatic gearbox control unit |
| J293 | Radiator fan control unit |
| J623 | Engine control unit, central in plenum chamber |
| T3e | 3-pin connector |
| T14 | 14-pin connector |
| T47a | 47-pin connector |
| T52 | 52-pin connector |
| T80 | 80-pin connector |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 607 | Earth point, on left in plenum chamber |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D61 | Connection (air conditioning system), in engine compartment wiring harness |
| * | Connection for air conditioning system |
| *2 | Only models with no automatic gearbox |
Wiring Diagram VW JETTA 2014 - Engine control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4
| J623 | Engine control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| S232 | Fuse 32 in fuse holder |
| T14a | 14-pin connector |
| T80 | 80-pin connector |
| D95 | Connection (injectors), in engine compartment wiring harness |
Wiring Diagram VW JETTA 2014 - Lambda probe - Accelerator position sender - Lambda probe after catalytic converter - Accelerator position sender 2 - Engine control unit - Lambda probe heater - Lambda probe 1 heater after catalytic converter
| G39 | Lambda probe |
| G79 | Accelerator position sender |
| G130 | Lambda probe after catalytic converter |
| G185 | Accelerator position sender 2 |
| J623 | Engine control unit |
| T4d | 4-pin connector |
| T4f | 4-pin connector |
| T6j | 6-pin connector |
| T80 | 80-pin connector |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe 1 heater after catalytic converter |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW JETTA 2014 - Cruise control system switch - Cruise control system (CCS) SET button - Clutch pedal switch - Clutch pedal switch 2 - Starter inhibitor relay - Engine control unit
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| F36 | Clutch pedal switch |
| F379 | Clutch pedal switch 2 |
| J207 | Starter inhibitor relay |
| J623 | Engine control unit, central in plenum chamber |
| T4az | 4-pin connector |
| T4q | 4-pin connector |
| T9n | 9-pin connector |
| T10s | 10-pin connector |
| T80 | 80-pin connector |
| A20 | Positive connection (15a), in dash panel wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with cruise control system |
| *2 | Only models with manual gearbox |
Wiring Diagram VW JETTA 2014 - Brake light switch - Brake pedal switch - Engine control unit - Activated charcoal filter solenoid valve 1
| F | Brake light switch |
| F47 | Brake pedal switch |
| J59 | X-contact relief relay |
| J104 | ABS control unit |
| J623 | Engine control unit |
| N80 | Activated charcoal filter solenoid valve 1 |
| S13 | Fuse 13 in fuse holder |
| T4aq | 4-pin connector |
| T6ac | 6-pin connector |
| T47a | 47-pin connector |
| T80 | 80-pin connector |
| A18 | Connection (54), in dash panel wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
| A57 | Positive connection 3 (30), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW JETTA 2014 - Fuel pump relay - Onboard supply control unit - Engine control unit - Fuel supply relay
| J17 | Fuel pump relay |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| J643 | Fuel supply relay |
| T10y | 10-pin connector |
| T73a | 73-pin connector |
| T80 | 80-pin connector |
| A189 | Positive connection 5 (30a) in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW JETTA 2014 - 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 |
| N110 | Selector lever lock solenoid |
| S228 | Fuse 28 in fuse holder |
| S243 | Fuse 43 in fuse holder |
| U1 | Cigarette lighter |
| 42 | Earth point, next to steering column |
| 49 | Earth point, near ..., near steering column |
| 81 | Earth connection 1, in dash panel wiring harness |
| 135 | Earth connection 2, in dash panel wiring harness |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| A99 | Connection 1 (87) in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with no automatic gearbox |
| *2 | Only models with multifunction display |
| *3 | Only models with no Climatronic |
Wiring Diagram VW JETTA 2014 - Oil pressure switch - Speedometer sender - Control unit in dash panel insert
| F1 | Oil pressure switch |
| F4 | Reversing light 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 |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 608 | Earth point, central in plenum chamber |
| B163 | Positive connection 1 (15), in interior wiring harness |
| * | Only models with manual gearbox |
Wiring Diagram VW JETTA 2014 - Fuel gauge - Coolant temperature gauge - Rev. counter - Speedometer - Buzzer and gong - Control unit in dash panel insert - Onboard supply control unit - Alternator warning lamp - Reserve fuel warning lamp
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| H3 | Buzzer and gong |
| J255 | Climatronic control unit |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K2 | Alternator warning lamp |
| K105 | Reserve fuel warning lamp |
| T4 | 4-pin connector |
| T12d | 12-pin connector |
| T16b | 16-pin connector |
| T32 | 32-pin connector |
| T73b | 73-pin connector |
| A17 | Connection (61), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| * | Only models with no Climatronic |
Wiring Diagram VW JETTA 2014 - Multifunction display call-up button - Multifunction display memory switch - Multifunction indicator - Control unit in dash panel insert - Data bus diagnostic interface - Cruise control system warning lamp - Exhaust emissions warning lamp
| E86 | Multifunction display call-up button |
| E109 | Multifunction display memory switch |
| G17 | Ambient temperature sensor |
| J104 | ABS control unit |
| J119 | Multifunction indicator |
| J255 | Climatronic control unit |
| J285 | Control unit in dash panel insert |
| J533 | Data bus diagnostic interface |
| K31 | Cruise control system warning lamp |
| K83 | Exhaust emissions warning lamp |
| T6e | 6-pin connector |
| T12d | 12-pin connector |
| T16 | 16-pin connector |
| T20 | 20-pin connector |
| T32 | 32-pin connector |
| T32a | 32-pin connector |
| T47a | 47-pin connector |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| * | Only models with no Climatronic |
| *2 | Only models with multifunction display |
| *3 | Only models with Climatronic |
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