Hi,

I am posting last reply in this topic. I finally fixed that broken modul with my friend. The reasan why it stopped working was that voltage regulator from 12 to 5 volts was broken. It was giving only 1 volt on output.
Here is picture of broken regulator TA8002AS. After replacing regulator, remote control and other stuff is working again. I have ordered it from aliexpress for 3€, postage 2€, so fixing it cost me only 5€, but a lot of time.
I hope this will help someone whose modul stopped working.

Now I can start fixing other things on this car

Thanks for letting us know what fixed it!