Elementary TPMS Question

My 2018 Tundra is the first vehicle I've owned that has a TPMS system that gives me the pressures of each tire in their respective positions.

My question is, when the wheels are rotated, how does the system know that the position of each wheel has changed?

Example: Before I had the dealer rotate, I checked the pressure of each tire and the display matched (pressures to position). After rotation (dealer didn't change pressures to match door sticker) I adjusted pressures to be correct and the display matched again (pressures to position).

I don't get it.

Dan

 

A lot of technology, more easily explained in this article. https://en.m.wikipedia.org/wiki/Direct_T
Hope that helps. Essentially each sensor has it's own ID programmed to the truck and the truck can recognize where the signal comes from.

 

Oh yeah, that makes sense now that I think about it. Much more sophisticated than my 2006 TPMS which only went off if a tire (any tire) went low. I had to go around and look for the offending tire and sometimes it was just the spare.

Dan

 

Understood, tech advancements sure have improved. 1 of the few good things.