jamesh
Posts: 24
Joined: Sun May 31, 2015 9:45 am
Delivery Date: 23 Jun 2015
Leaf Number: 407612
Location: Auburn, CA

Nissan Leaf TCU 3g Upgrade/Replacement

Fri Jan 27, 2017 9:23 pm

The short story:
Had the TCU (TCM?) upgrade completed on my 2013 Leaf. After the upgrade, I had to go into the carwings settings and log-in to the system again. This was easy as the log-in information was already stored, so I just had to hit the button. It went through some communication process, and from inside the car, I turned on the EV Connect app and was able to warm up the car. Yes!

The Long Story:
I originally took my car into the dealership in December (Future Nissan of Roseville) for a seatbelt issue, but also requested the upgrade of the TCU. They were super cool and gave me a free rental, yet the next day told me the TCU had already been upgraded. I was skeptical as I purchased this car in 2015 as a two year lease return. Regardless, they did not charge me for the new seatbelt (though they tried to blame it on my "I Can't Believe It's Not Leather" seat covers.
Naturally, in a couple weeks the EV Connect (Carwings) was not working. I tried several quick fixes before calling Nissan. The number on the Nissan Connect site was able to verify, by the TCU number, that it was not upgraded. So, back to the dealership I go. Fortunately, I work one mile away, so I schedule my appointments on days with no rain, and walk to work from the dealership. When I picked it up I was told it could take as long as 48 hrs to reset (whatever). The next day I tried to start the climate control but no dice. I followed the advice of someone who had posted in the comments section of an article about the TCU (see above) and it worked perfectly.
I know this topic has been beaten to death, but It is unfortunate that the Best Selling ev in the world has dealerships that know so little about the car. I am sure this may be different in bigger markets, such as LA and SF, but I hope that as evs become more common, this become less of an issue.
Still love the car!
Joined the 'Revolution" with my 2013 Pearl White SV. Love It!

werty19
Posts: 4
Joined: Sun Jan 08, 2017 12:14 pm
Delivery Date: 14 Nov 2012
Leaf Number: 020667

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Sat Jan 28, 2017 11:52 am

Side note. How do you like Nissan of Roseville? I mean like overall. I am in the Folsom area and thinking about going to Roseville instead of Folsom Nissan.

sdbmania
Posts: 129
Joined: Tue Jan 25, 2011 12:03 pm
Delivery Date: 23 May 2011
Leaf Number: 408285
Location: Southern California
Contact: Website Twitter

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Mon Jan 30, 2017 10:41 pm

I just had my TCU installed. I live in SoCal, and my dealer was knowledgeable about the problem. I was lucky in that they had one part left. I didn't ask first, but I was on a time crunch :o .
2011 SL
Reserved: 6/21/2010
RAQ: 1/25/2011
Order accepted: 1/25/2011
Delivered: 5/10/2011

2013 SL, March

Now 2013 SV Blue LEAF with QC and Premium package, 1/25/17.

Sandman333
Posts: 3
Joined: Wed Jan 11, 2017 9:13 pm
Delivery Date: 10 Jan 2017
Leaf Number: 410859
Location: Chandler, AZ

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Tue Jan 31, 2017 1:43 pm

I just had mine replaced by Autonation Nissan in Tempe, AZ. I dropped my 2013 off at 7AM, and it was ready to be picked up at 11AM. I entered my Carwings information soon after picking it up and it seems to be working perfectly. This service department seems to know what they need to do to get it up and running, so I recommend them!
Bought a 2013 SV with 20k miles on 1/10/2017!

TheTeslaDream
Posts: 5
Joined: Sun Jan 15, 2017 5:49 pm
Delivery Date: 31 Dec 2016
Leaf Number: 2533

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Wed Feb 01, 2017 5:31 pm

Bought my 2012 Nissan Leaf SL 12/31/2016. have since then paid $200 for a TCU upgrade. Worked for a week or so and now is not working. My 12 volt batter reads 12.56 volts. Over the phone say said the TCU is faulty but i beleive the whole network for NissanConnect is faulty. If not, then how could the TCU still update the nearest stations without any problems but Starting climate control from online (app or computer) gives so many issues?

User avatar
Coronado54
Gold Member
Posts: 11
Joined: Wed Sep 16, 2015 7:30 am
Leaf Number: 019904

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Fri Feb 17, 2017 12:41 pm

I did the upgrade in January. Didn't work so I got on the help line and they walked me through setting everything. Worked great for about a week. It has been spotty ever since. Cannot connect 90% of the time from my laptop or smartphone. I set options to send emails and text my phone. I don't get any text messages. The only remote that functions regularly is it does send me an email in the early AM when the charging is done. Other than that it is hit and miss.........

VitaminJ
Posts: 374
Joined: Tue Jan 03, 2017 11:46 am
Delivery Date: 07 Jan 2017
Leaf Number: 415775
Location: Morrison, CO
Contact: YouTube

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Fri Feb 17, 2017 12:50 pm

TheTeslaDream wrote:Bought my 2012 Nissan Leaf SL 12/31/2016. have since then paid $200 for a TCU upgrade. Worked for a week or so and now is not working. My 12 volt batter reads 12.56 volts. Over the phone say said the TCU is faulty but i beleive the whole network for NissanConnect is faulty. If not, then how could the TCU still update the nearest stations without any problems but Starting climate control from online (app or computer) gives so many issues?

I have been doing testing of Carwings vs. 12v system voltage. Around 12.5v is where I've decided my TCU gets unreliable. Since I have upgraded my 12v battery my Carwings has worked 100%.

You can see my posts in this thread starting here:

viewtopic.php?f=31&t=21573&start=510#p482808

Since then, about 5 or more people have reported that charging or replacing their 12v fixed Carwings for them. I have mentioned it to a similar number of people on the Facebook group and they reported that it fixed theirs also.
2013 Ocean Blue SV w/ QC and LED
- +0.2 mi/kwh Aeromods
- 2lb 5Ah LiFe 12v battery

tszukow
Posts: 57
Joined: Sun Dec 08, 2013 10:34 am
Delivery Date: 11 Dec 2013
Leaf Number: 408765
Location: Surrey,BC Canada

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Sat Mar 04, 2017 8:43 pm

I just had mine US model in Canada done by Jonker Nissan Nissan in Surrey BC. Everything is working perfectly after 2 hrs job. Total my cost 220 CDN including tax. The also reprogram passenger seat sensor as per recall.
2013 "Brilliant Silver" SL with Premium Package .
3.2 kW Solar.

jerkwagon
Posts: 18
Joined: Sat Mar 26, 2016 12:16 pm
Delivery Date: 28 Feb 2017
Leaf Number: 411662

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Sat Mar 04, 2017 9:22 pm

tszukow wrote:I just had mine US model in Canada done by Jonker Nissan Nissan in Surrey BC. Everything is working perfectly after 2 hrs job. Total my cost 220 CDN including tax. The also reprogram passenger seat sensor as per recall.



wow thats great news, did you have to do anything special? how long did it take for the part ot come in, i have an appointment tuesday in bellingham but if i can just goto surrey and save about 70$ that would be great! can you PM me your detail or just post them herE?
2013 Leaf SV US import

alozzy
Posts: 668
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Nissan Leaf TCU 3g Upgrade/Replacement

Sun Mar 05, 2017 12:19 am

@tszukow, do you mind posting here:

viewtopic.php?f=31&t=23248&start=110

There are a bunch of Canadian owners of US Leafs in the same situation who would appreciate the details of how you talked a Surrey dealer to do the TCU copay replacement.

Thanks!
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

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