@Muza: Hi.
Hmm........clearly the new speed sensor is OK if it works on the other side of the car. So, there is something odd happening with the front right-side installation that's problematic. I don't have a wiring diagram for a MY16 Jetta, but I understand that it' has a PQ35 platform - so the same as a Golf mk6.
Have you checked the toothed ring inside the wheel housing and is the air gap between the speed sensor and the toothed ring free of detritus?
I'm not sure if the speed sensor has 2 x wire (or 3 x wires). If 2 x wire, with the sensor installed- hook-up a multi-meter to the sensor and rotate the wheel. With the multi-meter set to a low DC voltage range, rotate the wheel - does the meter show a reading?
Finally, the speed sensor circuit to J104 is very simple and it's repeated 4 x times. Before you throw $4,000 at this problem - grab a wiring diagram and swap the wires for the front right-side wheel sensor for the speed sensor wires to another wheel at the J104 connector. The best way to do this is to de-pin the wires from the connector - but you might need to cut/splice the wires somewhere near the J104 connector instead. Then make a fresh SCAN.
If the fault follows the swapped wires, the problem is NOT in the module! If you have tested the sensor by de-pinning the wires on the connector and the fault remains on the front, right-side - it's fairly clear that the J104 module is faulty
Don
Last edited by DV52; 19-01-2025 at 08:49 AM.
Please don't PM to ask questions about coding, or vehicle repairs. The better place to deal with these matters is on-line, in the forum proper. That way you get the benefit of the expertise of the wider forum! Thank you.
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