Vsc problems. Please help!

Hey everyone, I’m having a huge problem with my vsc/abs. I have a 2015 sr5 and it will randomly act up every month or so by setting off the vsc on dry pavement anywhere from 25-80mph while driving straight. It will also slam on the brakes with absolutely zero warning. It’s extremely dangerous and I don’t want to drive it anymore. I’m scared I’m going to get into an accident I have brought it to 3 Toyota dealerships and no one can figure it out. It doesn’t throw any abs codes. I’ve searched on just about every Toyota and Lexus forum. Any help is appreciated. Please help.

 

Car care nut fellow had a car with a similar problem. Your rack has excessive movement resulting in your ECU thinking you are sliding every time you make a turn and slamming the brakes on it's own. Get your rack checked for wear and tear or excessive play.

 

That's a good summary of that episode. It's definitely worth checking.

 

Don’t throw the parts cannon at it based on my thoughts, but sounds like a wheel speed sensor? ( I am not an expert ). I have watched the video lc200 refers to and it’s worth viewing as well.

 

I started experiencing the same thing after I removed/re-installed my steering wheel. From what I understand a ZPC (zero point calibration) may help. https://trail4runner.com/2020/02/09/limp-mode-zero-rate-yaw-rate-calibration/

 

Use an OBD2 reader with real time data. Jack the vehicle off the ground with the transmission in neutral. Spin each tire by hand and verify the wheel speed data in the reader shows sensible values with no dropout. If you see abnormal readings, inspect that corner in detail. It's easy to damage the wheel speed sensor wiring off road or doing suspension work. The wheel bearing with the magnetic tone ring may be damaged or has debris blocking parts of it.