mmmmm,there is no demo mode on that unit,what is it,a DEH-P4600? of 5600?

did you hook up the orange wire on the pioneer?,

if so,try disconnecting it and see what happens,because there is no setting in the menu for what you are seeing.

also,where did you get ground for the pioneer from,because if you used a metra harness adaptor,nissan does not put ground in the radio harness,and the black wire on the metra harness is dead,you need to get ground from metal in the console area somewhere.