How Godiag GT100 help program VW Porsche key AKL via OBDII?

When you have VW or Porsche cars with all keys lost, and tried to use Key Programmer like VVDI2 to program new key, it failed to communicate with the car via the OBDII connector, then get one Godiag GT100 or GT100+, which can activate the meter and immobilizer by short-circuiting 1-16PIN.

Attach the image of the brief schematic diagram.

Good source of Godiag GT100:

https://www.obdexpress.co.uk/wholesale/godiag-gt100-obdii-breakout-ecu-box.html