LeftieBiker wrote:The 2G to 3G upgrade has been problematic for quite a few people. Unless you really need it, you may want to hold off a while on that, until the bugs are worked out.
I concur. (raising hand)
Once Nissan got it working via a master reset via their backend, it eventually seems to intermittently not work, often accompanied by a ! yellow car warning light accompanied by a DTC P3131. I usually clear the DTC (just to see if it comes back later) and then eventually, it starts working again for awhile until these probs come back. I haven't had a chance to update my status in one of those threads but I've been taking notes and will post a summary as I got thru more cycles of these.
This was NEVER a problem when the I had the working 2G TCU on my former leased Leaf for 2 years and on my current used '13 Leaf SV (built 5/2013) that I had since July 2015. This also wasn't a problem when AT&T shutdown its 2G network in early Jan 2017, rendering the 2G TCU useless.
I paid the $199 and it didn't work (couldn't sign in, would fail with error (B02). Had to call Nissan EV support, return to the dealer, call Nissan EV support again, etc. When it started partially working, around 4/28/17 is when I first started getting the yellow ! car and DTC P3131 (see viewtopic.php?p=493278#p493278
I really hope Nissan figures this out and issues a TSB w/a fix.