On 11/29/18 I brought my 2011 Leaf in for the TCU upgrade. I got it back with assurances that everything went fine but it would take "a couple of days" before it would actually work. I downloaded the app for my phone and was successful in logging in to the EV Connect portal but I've never been able to get the car to respond after 6 days, either to charge or to start the climate control.
Today I called the main Nissan EV service number and the rep there told me the dealer never registered the telematics unit with Nissan. I went into the dealer and they were very apologetic and said they'd take care of it in 10 or 15 minutes. 50 minutes later the service rep came to get me with a paper in his hand and explained that on 11/30, one day after they did the work on my car, a service bulletin came out requiring both a software upgrade and new hardware module for the telematics in cars in my VIN range. They don't have the part and have ordered it. He showed me the sheet and it was dated 11/30 and had a chart with three rows of VIN numbers with different part numbers listed next to them. He was very embarrassed and apologetic, but the bottom line is that I'll have to take it back and start from scratch after they get the new part. FWIW, he said they have registered my car's telematics with Nissan now. I'm not sure how they can do that without the new part, but maybe that will save a step. Ironically, before I brought the car in last week, I called to be sure they had the part.
So if you are planning to upgrade, be aware that this bulletin just came out and there are three different parts involved, so check to make sure they have the right one for you before you go in. If you've been having problems with your TCU unit, you may want to take it back now that they have supposedly fixed both software and hardware problems.
2011 SL down to 9 capacity bars