New test feedback: Hyundai ix35 2011 Pincode from Vvdi key tool vs. lonsdor k518 vs. xtool ps90.
In my case, Xhorse VVDI Key tool succeed, Lonsdor and Xtool failed.
First try Lonsdor K518, failed to read pin
Then try Xtool PS90/X100 Pad2, failed to communicate either
Try VVDI Key Tool, read security pin code no issues
Automatic Detection Clone->Identify ID46 PCF7936 chip->Select Mode 1 data acquisition
Get More->Hyundai Password
VVDI key tool successfully calculated Hyundai password.