Transform a Nuvi 37xx in a Nuvi 34xx for dummies

**Neil** · 15th October 2013, 09:43 AM

JVC folder from .system deleted
mad MAP folder on SD card and insert CN NT 2014.20 EU and gmap3D.img
made JVC folder on sd card ( /Garmin/JVC )
Put in here the JVC files

Maybe they're just typos and you actually have 'JCV' naming not 'JVC'. If it's wrong fix that and try again. If you have it right as 'JCV', follow the rest of this:

Is the JCV file recognised in the units Inventory? To find it: Press and hold battery symbol until a hidden menu pops up>repeatedly press 'Back' or 'Next' until you see a page with 'Version Information etc' at the top>press Start Test>More. Under the Map listings just above 'Splash' you should see 'JCV' and it's details. Doesn't mean it's the correct file though, just means the unit's seeing it.

There is a similar solved discussion in the 1xxx upgrade thread, read from [Only registered and activated users can see links. ].

Are you also sure you have the correct JCV file for the detail map version. The files are different for each version. Remove any old JCV files too as they can interfere with proper operation of new JCV files.

Finally, did you clear NV before and after conversion? Did you scroll thru quite a long simulated route along a major highway? Nowhere near all 'junctions'/major exits have a Junction View pic.