Driving on the hiway in my 2017 IS300 FSport.....
Glanced at the center of the tach....where I keep the tire pressure indicator on.....
I see an orange steering wheel icon...no audible alarm....and it disappears quickly.

Checked the manual.....it is an alert part of the lane departure that senses that the wheel is not gripped.
Never happened before. I tried to reproduce it by intentionally not gripping the wheel for a few seconds.
Nope.Anybody?

It was not the "check electronic steering icon" BTW. That is on the side with the other warning lights.

 

If you get too close to a lane marking or pretty much over it, it will do that.