Contents: Numerical designations (points and…⬇ Designations on "A" and "B"…⬇ Designations "C" - "E" (generator,…⬇ Designations on "F" (sensors, sensor…⬇ Designations on "G" (sensors) ⬇ Designations with "H" (sound signals) ⬇ Designations on "J" (electronic…⬇ Designations starting with "K" (K/L,…⬇ Designations on "N" - "Q"…⬇ Designations on "R" (components of…⬇ Designations on "S" - "T" (fuses,…⬇
Numerical designations (points and connections of mass)
Note: The number in the rectangle at the end of the wire indicates the coordinate of the continuation of this wire (within the same scheme).
| 1 | Ground wire between battery and body |
| 12 | Ground point, in engine compartment, left |
| 14 | Ground point, on manual transmission/DSG |
| 15 | Mass point on cylinder head |
| 78 | Mass point, lower part of the right B-pillar |
| 281 | Ground connection #1, in the engine compartment wiring harness |
| 283 | Ground connection #2, in the engine compartment wiring harness |
| 306 | Mass connection (ignition coils), in the engine compartment wiring harness |
| 327 | Mass connection (sensor mass), in the engine compartment wiring harness |
| 366-389 | Ground connection #1-#24, in the main wiring harness |
| 410 | Mass connection #1 (sensor mass), in the main wiring harness |
| 458 | Ground point #3, in the engine compartment wiring harness |
| 474 | Mass connection (sensor mass), in the engine compartment wiring harness |
| 607 | Mass point, in the air intake chamber on the left |
| 671 | Mass point #1 at the front on the left side member |
Designations on "A" and "B" (battery, starter, connections)
Note: All connections listed are in the main wiring harness.
| A | Battery |
| IN | Starter |
| B273 | Positive connection (15) |
| B276 | Positive connection (50) |
| B277-B282 | Positive connection #1-#6 (15a) |
| B315-B327 | Positive connection #1-#13 (30a) |
| B335 | Compound 1 (54) |
| B344 | Compound 1 (61) |
| B350-B354 | Connection 1-5 (87a) |
| B383-B385 | Connection #1-#3 (cAN-P high bus) |
| B390-B392 | Connection #1-#3 (cAN-P low bus) |
| B708 | Connection #1 (cAN bus instrument cluster, High) |
| B709 | Connection #1 (cAN bus instrument cluster, Low) |
Designations "C" - "E" (generator, connections, switches)
Note: All connections listed are located in the engine compartment wiring harness.
| SH1 | Generator with voltage regulator |
| D141 | Connection (5V) |
| D174 | Connection 2 (5V) |
| D189 | Connection (87a) |
| D196 | Compound 2 (87a) |
| E221 | Control panel on the multifunction steering wheel |
Designations on "F" (sensors, sensor switches)
| F | D/W brake lights |
| F22 | Engine oil pressure sensor |
| F47 | Brake pedal position sensor |
| F378 | Low pressure engine oil pressure switch |
Designations on "G" (sensors)
| G | Fuel gauge sensor |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Tachometer |
| G6 | Fuel supply system filling pump |
| G21 | Speedometer |
| G28 | Crankshaft speed sensor |
| G31 | Turbo Boost Pressure Sensor |
| G39 | Lambda probe |
| G40 | SMR sensor |
| G42 | IAT sensor |
| G61 | Knock Sensor #1 |
| G62 | Coolant temperature sensor |
| G70 | Mass Air Flow Sensor |
| G79 | Accelerator pedal position sensor |
| G83 | Coolant temperature sensor at the radiator outlet |
| G85 | Steering wheel angle sensor |
| G130 | Post-catalytic lambda probe |
| G169 | Fuel gauge sensor #2 |
| G185 | Sensor #2 of the gas pedal position |
| G186 | Throttle actuator |
| G187/G188 | Throttle Position Sensor #1/#2 |
| G247 | Fuel pressure sensor |
| G266 | Engine oil level and temperature sensor |
| G273 | Anti-theft alarm cabin volume sensor |
| G299 | Intake air temperature sensor #2 |
| G336 | Intake manifold flap potentiometer |
| G384 | Vehicle tilt sensor |
| G397 | Rain and light sensor |
| G419 | ESP sensor block |
| G476 | Clutch position sensor |
Designations with "H" (sound signals)
| H12 | Anti-theft alarm siren |
Designations on "J" (electronic control units, relays)
| J104 | ABS/ESP control unit |
| J151 | Continuous coolant circulation relay |
| J217 | DSG transmission control unit |
| J234 | SRS control unit |
| J255 | Control unit of the climate control system Climatronic |
| J271 | ECM Motronic Power Relay (main relay) |
| J285 | Control unit in the instrument cluster |
| J293 | Radiator Fan Control Unit |
| J301 | Climate control unit Climatic |
| J338 | Throttle body module |
| J345 | Trailer Recognition Unit |
| J362 | Immobilizer control unit |
| J364 | Additional heater control unit |
| J386/J387 | Driver/Front Passenger Door Control Unit |
| J388/J389 | Rear left/right door control unit |
| J400 | Windscreen wiper motor control unit |
| J412 | Mobile phone control electronics control unit |
| J446 | Parking assistance system control unit |
| J492 | All-wheel drive control unit |
| J500 | Power Steering Control Unit |
| J503 | Control unit (with display) audio/navigation system |
| J519 | On-board power supply control unit |
| J527 | Steering Column Electronics Control Unit |
| J533 | Diagnostic interface of data transmission buses |
| J538 | Fuel pump control unit |
| J543 | Control unit for adjusting the driver's seat and outside rearview mirrors |
| J583 | NOx sensor control unit |
| J587 | DSG Mode Selector Lever Sensor Control Unit |
| J623 | ECM |
| J650 | Multimedia system control unit |
| J667/J668 | Left/Right Headlight Power Supply |
| J682 | Terminal 50 Power Supply Relay |
| J745 | Control unit for adaptive lighting and headlight range control |
| J757 | Engine Compartment Component Power Relay |
| J791 | Parking autopilot control unit |
Designations starting with "K" (K/L, indicators)
| TO | Instrument cluster | |
| KZ | K/L low pressure motor | oils |
| K28 | K/L overheating and low coolant level | |
| K38 | K/L low engine oil level | |
| K83 | K/L MIL | |
| K105 | Low fuel indicator | |
| K132 | K/L electronic power control malfunction |
Designations on "N" - "Q" (electromagnetic valves, injectors, actuators, spark plugs)
| N30-N33 | Injectors for cylinders No.1-4 |
| N70 | Ignition coil #1 with output stage |
| N75 | Turbocharger Pressure Regulating Valve |
| N80 | EVAP canister purge solenoid valve No.1 |
| N127 | Ignition coil #2 with output stage |
| N₂05 | Intake camshaft adjustment valve #1 |
| N₂49 | Turbocharger Air Recirculation Valve |
| N₂76 | Fuel pressure regulating valve |
| N₂91/N₂92 | Ignition coil #3/#4 with output stage |
| N316 | Intake manifold flap valve |
| N428 | Solenoid valve for regulating engine oil pressure |
| R | Spark plug connector |
| Q | Spark plug |
Designations on "R" (components of multimedia, navigation and communication systems)
| R12 | Audio system amplifier |
| R78 | Television receiver |
Designations on "S" - "T" (fuses, connectors, pumps)
| SA | Fuse holder A (see above) |
| SAx | Fuses No. x in holder SA (see above) |
| SB | Fuse holder B (see above) |
| SBx | Fuses No. x in holder SB (see above) |
| SC | Fuse holder C (see above) |
| SCx | Fuses No. x in holder SC (see above) |
| T1... | 1-pin connector |
| T2... | 2-pin connector etc. |
| T16 | 16-pin diagnostic connector |
| V51 | Coolant pump after engine shutdown |
