Anyone know how the TSS radar ACTUALLY works?

Sometimes the cheap ones are too thick. I decided to just go without a varnish since it’s pretty obvious it’s not part of the grill anyway.

If you’re married you can have your wife stand in the street and roll at her at about 20mph. Make sure she has life insurance

Edit for legal purposes - the above is a joke

 

Yes there is calibration for the TSS system. So it you changed the unit, moved it, it may need to be calibrated. Toyota can do this for you, probably 200-300 bucks I would guess. I do not know if the calibration is something DIY. The TSS system is set up for some rake, so it you have lifted or leveled that could be a contributor. Check post 14 here about DIY adjustment if your truck does not have enough rake.

And as far as it working, if your adaptive cruise control is working, the TSS system is working.

 

Some folks have reported issues after lifting their truck (changing the height and angle of the sensor) which can be adjust via techstream calibration.

The emblem needs to be made of a specific material to allow the radar to penetrate without distortion/interference. The specific TSS emblem is more expensive for this reason. @2020Platinum relocated his sensor without any issues.

A system diagnostic would tell you what isn't functioning properly Here is an example (on a Taco) of the procedure:
https://www.youtube.com/watch?v=CnitT5UUhQo