is an R35 GTR Audio Specialist
GTR.co.uk seasoned Member
Join Date: Jul 2002
Cars owned: Nissan GTR, Supra TT, 2 x M3 Cab, 335d
Unusual problem you have there. Especially on a 2015 model with the later head unit. There is a nav aerial plugged into the back of the AV unit which is worth checking if its plugged in okay. Grey, square one.
I'd pull your battery off/on just in case its a software glitch.
The hidden menu will give you the option of a system check where it checks the GPS signal too.