When I start up the car and the tuner is on XM radio, i will see and hear XM for about 30 seconds. Then Check Antenna displays. I have verified and have been able to reproduce it over and over. Antenna is fine. IF I pull the power plug on the XM unit, and plug it back in I get the same results.
WTF! I have been running this Avic-N2 with XM for almost 3 years!