2011 Prius, no Nav, SAT was working. It has been a bit wonky the last 2 months. Now, "no signal". I bought a used 51882 radio to replace my 51882. It works (or does not work) the same. AM/FM work. CD works. My guess is the SAT antenna or, from what is seem to find, is there is a SAT amp under the passenger seat?
