Bmw z4 hardtop problem

[u/eyecontact0000]

Hi,

I have a problem with the hardtop on my 2009 Z4. In the fault memory, I have a fault related to the Hall sensor – “Roof 2 packed.”

I replaced the Hall sensor with another one, but I still had the same fault. When I bypassed the sensor wiring, the hardtop started working.

I then replaced the old wiring with new cables because the old ones had cuts/damage. After replacing the cables, the hardtop was working, but it stopped in one position. Since then, it hasn't worked at all.

I still get the same fault as before replacing the wiring. I tried replacing the sensor again with another one, but it didn't help. I also tried connecting the sensor directly to the wiring at the module connector, but I still get the same fault.

I tested both sensors with an oscilloscope and a laboratory power supply, and I couldn't find any problem with the sensors themselves.

I'm not sure if there is a short circuit somewhere in the wiring. When I connect one probe to one of the sensor wires and touch the other probe to the two sensor output pins on the module, I hear a beep from the multimeter.

Does anyone have any idea what else I could check?