I haven’t heard of anybody hacking the ABT module.
Why use ABT Advanced Technology No matter if petrol or diesel engines, the performance increase via the ABT Power software does make the difference. Electronic Engine Control Units (ECUs) are the control centre of modern vehicles, all functions gather here. With the ABT Engine Control Unit...
autofidelity.com.au
Good description of what it does in link above, but again not definitive.
Only things we know for sure are..
1) Only gives full power when oil temps hit safe value. (80 or 90’c can’t remember)
Everything else is speculation about when it reduces power