I've gone through all the stuff I have for mine....but I can't find anything about it
I also DL's manuals for the "Versa" (Note) and Cube from the US Nissan site...nothing in those either
do you have a sat nav system?
...as it may well be within the settings for that
on the Almera you can alter settings using the sat nav screen
click ignition to "On" and turn the Audio system off ....
turn the volume kn0b 30 clicks...one way....it opens up a new "settings...adjustments" screen...
if yours does the same then this may be where the settings can be checked/changed
Sorry I couldn't help more clearly or thoroughly
....it may be an idea to call your local/nearest dealer and get them to talk you through it
....they can't charge you for that surely?