From the article, the data Tesla withheld from the court revealed:
* There was no record of a “Take Over Immediately” alert, despite approaching a T-intersection with a stationary vehicle in its path.
* Moore found logs showing Tesla systems were capable of issuing such warnings, but did not in this case.
Everytime you put your foot on the accelerator while the system is engaged a warning pops up saying the car will not brake.
It happens right away and has nothing to do with any other warnings. If you own a Tesla you have seen this warning over and over.