yardbird88

Not quite true. It stop me from backing up to the trash bin (Plastic)

Kansas

Does that mean that it cannot sense Corvettes and other vehicles that have fiberglass bodies?

Cardboard boxes actually can inappropriately trigger Toyota/Lexus PCS and the automatic emergency braking systems of vehicles made by other companies. There are some fun videos on YouTube demonstrating this.

There is a long list of situations described in your RX owners manual on when PCS may be invoked when there is no danger of collision. Steel plates on streets and railroad tracks have especially caused PCS on our vehicles to be inappropriately triggered numerous times.

Kansas

That was your parking sensors operating - not PCS. PCS is only at the front of your RX.

Marqevans

I approached a car in the left lane that had slowed down. I was coming up on that car at about 60 mph. I didn't notice he was slowing down until the last minute. The orange warning light came on and it beeped. I hit the brake in time but the car did not activate the brakes. I did not have the radar cruise on. I wonder what's the highest speed that the brakes would activate by themselves?

Jiggz858

Maybe someone can do a test using a large cardboard box wrapped in aluminum foil to see how far or close and at what speed is activates.

Oldfart

Let me search that for you

Jiggz858

From that video the test speed whirls around 30-38 MPH.

Kansas

I was going about 60 mph in our Sienna in summer 2014 when a stopped car pulled in front of me. PCS nailed the brakes at full panic stop force before I got my foot off the gas pedal and my seat belt tightened so much that my chest hurt until the next day. It gave me enough time to swerve and avoid impact by inches. The whole experience took place in maybe a second or two.

Oldfart

Another one

Marqevans

Does the emergency braking work going forward without the cruise control on?

CharmCtyIS

Yes it does.