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Wiring Diagram VW JETTA 2014 - Starter - Alternator - Onboard supply control unit
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J207 | Starter inhibitor relay |
| J226 | Starter inhibitor and reversing light relay |
| J519 | Onboard supply control unit |
| 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 |
| T8 | 8-pin connector |
| T10z | 10-pin connector |
| T73a | 73-pin connector |
| T73b | 73-pin connector |
| TV2 | Terminal 30 wiring junction |
| A32 | Positive connection (30), in dash panel wiring harness |
| A41 | Positive connection (50), in dash panel wiring harness |
| * | Only models with no automatic gearbox |
Wiring Diagram VW JETTA 2014 - Glow plug relay - Onboard supply control unit - Engine glow plug
| D | Ignition/starter switch |
| J52 | Glow plug relay |
| J519 | Onboard supply control unit |
| Q6 | Engine glow plug |
| S229 | Fuse 29 in fuse holder |
| S237 | Fuse 37 in fuse holder |
| T2g | 2-pin connector |
| T6ab | 6-pin connector |
| T8 | 8-pin connector |
| T14a | 14-pin connector |
| T73b | 73-pin connector |
| A2 | Positive connection (15), in dash panel wiring harness |
| A80 | Connection 1 (X), in dash panel wiring harness |
| A176 | Connection (auxiliary heater), in dash panel wiring harness |
| A192 | Positive connection 3 (15a) in dash panel wiring harness |
Wiring Diagram VW JETTA 2014 - Air mass meter - Fuel pump relay - Diesel direct injection system control unit - Terminal 30 voltage supply relay
| G70 | Air mass meter |
| J17 | Fuel pump relay |
| J248 | Diesel direct injection system control unit |
| J317 | Terminal 30 voltage supply relay |
| S228 | Fuse 28 in fuse holder |
| T5m | 5-pin connector |
| T10y | 10-pin connector |
| T121 | 121-pin connector |
| A52 | Positive connection 2 (30), in dash panel wiring harness |
| A192 | Positive connection 3 (15a) in dash panel wiring harness |
Wiring Diagram VW JETTA 2014 - Coolant temperature display sender - Coolant temperature sender - Intake manifold pressure sender - Intake manifold temperature sender - Fuel temperature sender - Diesel direct injection system control unit
| G2 | Coolant temperature display sender |
| G62 | Coolant temperature sender |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| G81 | Fuel temperature sender |
| J248 | Diesel direct injection system control unit |
| J255 | Climatronic control unit |
| T14a | 14-pin connector |
| T16b | 16-pin connector |
| T121 | 121-pin connector |
Wiring Diagram VW JETTA 2014 - Diesel direct injection system control unit
| J104 | ABS control unit |
| J248 | Diesel direct injection system control unit |
| J293 | Radiator fan control unit |
| T4 | 4-pin connector |
| T14 | 14-pin connector |
| T47a | 47-pin connector |
| T121 | 121-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| B351 | Positive connection 2 (87a) in main wiring harness |
| * | Connection for air conditioning system |
Wiring Diagram VW JETTA 2014 - Kickdown switch - Idling speed switch - Engine speed sender - Accelerator position sender - Diesel direct injection system control unit
| F8 | Kickdown switch |
| F60 | Idling speed switch |
| G28 | Engine speed sender |
| G79 | Accelerator position sender |
| J248 | Diesel direct injection system control unit |
| T3e | 3-pin connector |
| T6j | 6-pin connector |
| T121 | 121-pin connector |
| 200 | Earth connection (screening), in engine compartment wiring harness |
Wiring Diagram VW JETTA 2014 - Diesel direct injection system control unit - Unit injector valve - No. 1 cyl. - Unit injector valve - No. 2 cyl. - Unit injector valve - No. 3 cyl. - Unit injector valve - No. 4 cyl.
| J248 | Diesel direct injection system control unit |
| N240 | Unit injector valve, No. 1 cyl. |
| N241 | Unit injector valve, No. 2 cyl. |
| N242 | Unit injector valve, No. 3 cyl. |
| N243 | Unit injector valve, No. 4 cyl. |
| T8i | 8-pin connector |
| T121 | 121-pin connector |
| 250 | Earth connection, in diesel engine prewiring harness |
Wiring Diagram VW JETTA 2014 - Hall sender - Diesel direct injection system control unit - Exhaust gas recirculation valve - Charge pressure control solenoid valve - Exhaust gas recirculation valve 2
| G40 | Hall sender |
| J248 | Diesel direct injection system control unit, central in plenum chamber |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N213 | Exhaust gas recirculation valve 2 |
| T3f | 3-pin connector |
| T10f | 10-pin connector |
| T14a | 14-pin connector |
| T121 | 121-pin connector |
| V157 | Intake manifold flap motor |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 607 | Earth point, on left in plenum chamber |
| E29 | Connection, in engine wiring harness |
Wiring Diagram VW JETTA 2014 - Clutch pedal switch - Diesel direct injection system control unit
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| F36 | Clutch pedal switch |
| J248 | Diesel direct injection system control unit |
| T4q | 4-pin connector |
| T10s | 10-pin connector |
| T121 | 121-pin connector |
| A20 | Positive connection (15a), in dash panel wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| * | Only models with cruise control system (CCS) |
Wiring Diagram VW JETTA 2014 - Brake light switch - Brake pedal switch - Diesel direct injection system control unit - Low heat output relay - High heat output relay - Coolant heating element
| F | Brake light switch |
| F47 | Brake pedal switch |
| J59 | X-contact relief relay |
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| Q7 | Coolant heating element |
| S13 | Fuse 13 in fuse holder |
| T4y | 4-pin connector |
| T6ac | 6-pin connector |
| T80a | 80-pin connector |
| T121 | 121-pin connector |
| A18 | Connection (54), in dash panel wiring harness |
| A57 | Positive connection 3 (30), in dash panel wiring harness |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW JETTA 2014 - Onboard supply control unit - Fuse 32 in fuse holder - Fuse 34 in fuse holder - Fuse 43 in fuse holder
| J519 | Onboard supply control unit |
| S232 | Fuse 32 in fuse holder |
| S234 | Fuse 34 in fuse holder |
| S243 | Fuse 43 in fuse holder |
| T73a | 73-pin connector |
| 42 | Earth point, next to steering column |
| 49 | Earth point, near ... |
| 81 | Earth connection 1, in dash panel wiring harness |
| A100 | Connection 2 (87) in dash panel wiring harness |
Wiring Diagram VW JETTA 2014 - Oil pressure switch - Speedometer sender - Buzzer and gong - Control unit in dash panel insert - Onboard supply control unit - Alternator warning lamp - Oil pressure warning lamp
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G6 | Fuel system pressurisation pump |
| G22 | Speedometer sender |
| G32 | Coolant shortage indicator sender |
| H3 | Buzzer and gong |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| S5 | Fuse 5 in fuse holder |
| S7 | Fuse 7 in fuse holder |
| T4 | 4-pin connector |
| T14a | 14-pin connector |
| T14c | 14-pin connector |
| T32 | 32-pin connector |
| T72b | 72-pin connector |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 608 | Earth point, central in plenum chamber |
| A17 | Connection (61), in dash panel wiring harness |
| B163 | Positive connection 1 (15), in interior wiring harness |
Wiring Diagram VW JETTA 2014 - Fuel gauge - Coolant temperature gauge - Rev. counter - Speedometer - Multifunction indicator - Control unit in dash panel insert - Data bus diagnostic interface
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| J104 | ABS control unit |
| J119 | Multifunction indicator |
| J285 | Control unit in dash panel insert |
| J533 | Data bus diagnostic interface |
| K28 | Coolant temperature and coolant shortage warning lamp |
| K29 | Glow period warning lamp |
| K83 | Exhaust emissions warning lamp |
| K105 | Reserve fuel warning lamp |
| T16 | 16-pin connector |
| T32 | 32-pin connector |
| T32a | 32-pin connector |
| T47a | 47-pin connector |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
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