When i tested the belts, i was cruising at around 50 mph or so and just release the gas quickly and slam on the brakes...the belts activated. I don't think that you NEED to go so far down the gas pedal.
I just tried the pre-collision seatbelt retraction and you guys are right. I accelerated quickly to about 52 MPH and braked abruptly and the seat belts retracted in what felt like two separate tugs followed by a firm hold. They stayed retracted until about a second after releasing the brake. I continue to learn new things on Priuschat about my Gen 3 V with ADP. Thank you everyone.
Haha, you're welcome! Sometimes, it's hard to explain in a forum because you think the other person's on the same page or sometimes it's just plain easier to show it in real life (but of course that's nearly impossible) so I'm glad that you were able to activate PCS seatbelts. I think the key, other than the higher-than-city-traffic speed, is the fact that you have to release the pedal quickly as if you were going to do an emergency stop to allow the computer to determine that you're in an emergency situation. I'm glad that I do have PCS. I would rather be tight in my seat, than have to lean forward before the pretensioners kick in (and be those few critical inches closer to the airbag should the worst happen). Plus, it also means you're in your proper driving position should you need to take evasive action instead of leaning forward.
While in cruise control on my 2017 Prime, PCS activated when a car in the right lane braked to make a right turn to exit the highway. PCS braking was pretty aggressive. Luckily there was no one behind me. This has happened a few times. I have been attempting to correlate to the pitch and curvature of the road. But I cannot find any consistencies. Another possible anomaly, I saw a YouTube where the collision alert went off when the vehicle was put in drive facing the wall of a garage. I almost drove into the car parked in front of me. No alarm went off.