Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Volkswagen Golf TDI, 2D Hatchback, Automatic DCT TransFACTORY OEM SERVICE PROCEDURE
Vehicle Electrical Control Module System Connector End View (J519, T52c)
| Cavity | Function |
|---|---|
| 1 | Positive connection 6 (30a), in dash panel wiring harness -A198-, vacant |
| 2 | Alarm horn -H12- |
| 3 | Right tail light bulb -M2- |
| 4 | Left brake light bulb -M9-, Left tail light -MX3- |
| 5 | 367 - ground connection 2, in main wiring harness |
| 6 | ... |
| 7 | Hazard warning lights button -E229- |
| 8 | ... |
| 9 | ... |
| 10 | Front interior lamp -W1-, interior monitoring deactivation switch -E267- |
| 11 | ... |
| 12 | ... |
| 13 | Positive connection 6 (15a) in dash panel wiring harness -A201- |
| 14 | Positive connection (50), in main wiring harness -B276- Steering column electronics control unit -J527- |
| 15 | Connection 1 (convenience CAN bus, high), in main wiring harness -B397- |
| 16 | Connection 1 (convenience CAN bus, low), in main wiring harness -B406 |
| 17 | Connection (54), in interior wiring harness -B131- |
| 18 | ... |
| 19 | ... |
| 20 | ... |
| 21 | ... |
| 22 | ... |
| 23 | ... |
| 24 | ... |
| 25 | Right fog light bulb -L23- |
| 26 | Connection (58L), in dash panel wiring harness -A84- |
| 27 | Number plate light -X- |
| 28 | Rear right fog light bulb -L47-/right reversing light bulb -M17- |
| 29 | Right fog light bulb -L23 |
| 30 | Mechatronic unit for dual clutch gearbox -J743- P-N/Ground connection 3, in main wiring harness -368- Start/stop |
| 31 | Steering column electronics control unit -J527- |
| 32 | DC/AC converter with socket, 12V-230V -U13- |
| 33 | ... |
| 34 | Positive connection (50), in dash panel wiring harness -A41- |
| 36 | ... |
| 37 | ... |
| 38 | ... |
| 39 | ... |
| 40 | Central locking and anti-theft alarm system aerial -R47- Aerial screening |
| 41 | Central locking and anti-theft alarm system aerial -R47- |
| 42 | Fuse 16 on fuse holder B -SB 16- |
| 43 | ... |
| 44 | ... |
| 45 | ... |
| 46 | Right headlight main beam bulb -M32 |
| 47 | Rear left fog light bulb -L46-/left reversing light bulb -M16- depending on equipment |
| 48 | Left dip beam screen -V294- |
| 49 | Right dip beam screen -V295- |
| 50 | Front right turn signal bulb -M7- |
| 51 | Rear left turn signal bulb -M6- |
| 52 | Right dip beam headlight bulb -M31-/right headlight power output stage - J668- depending on equipment |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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