According to wikipedia (http://en.wikipedia.org/wiki/Tire-pressure_monitoring_system), most Tire-pressure monitoring systems nowadays use RF as their communication link.

I'm no EE major, but I do like to tinker with stuff like this... Anyone know what would be the best way to 'view' the RF signal? Hook something like this http://www.mouser.com/ProductDetail/Linx-Technologies/RXM-43... up to an oscilloscope?

Edit: This looks pretty useful as well: http://focus.ti.com/docs/toolsw/folders/print/ez430-rf2500.h...