My AVIC-F920BT after a successful update (2015 maps, version:6) has a special issue of radio receiver.
Sometimes (without pressing any button, or the touch panel) the radio receiver CHANGES from FM to AM.
Manually I can change back to FM and the FM station remains the same as it was before.
I disconnected the steering wheel remote controls, but the failure remained.
What could be the reason?
-Touch panel ?
-RDS-TMC tuner (CXE2176) ?
Thank you for any advice !