Problem: I have a Xtool h6 pro with kc501 (same as Xtool A80 PRO), I'm trying to read/write a BMW cas4 with no success, I follow the wiring diagram and tried the 2 methods the app shows. I've even connected the kc501 to my pc but still no comms.   Experienced user's advice: The black wire and...

...X3 xDrive20i (Europe). The seat memory, driver programming and coding were completed by  Xtool A80 Pro  (H6 Pro). Note: the device used is Xtool H6 Pro, but A80 Pro covers the same function.   Operation guide: Turn on Xtool tablet Select Xool  Diagnosis>> Diagnosis>> Europe>> BMW>> Automatic...