How do Tyre Pressure Sensors Work?
We're in the market for a Jeep Grand Cherokee. On Friday the sales person showed me some of its functions. In this case, the tyre pressure readout on the dash was an interesting feature.
However, I forgot to ask how they work. Perhaps someone here can give us the lowdown.
I understand that there's a radio link from each tyre to the readout. However, what powers the sensors and how long do they last?
I'm guessing that they're located within the valve stem.