lorenfb
Posts: 1405
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sat Aug 12, 2017 10:36 pm

LeftieBiker wrote:Is it possible to either wire in a remote On/Off switch for the TC unit's power, or to relocate the power supply to a circuit that's only live when the car is on?


That could possibly be done if one had access to the Leaf's wiring diagram. To start with, hopefully someone has taken
a picture of the location of the TCU and its electrical connector. Once that was done, obviously no CarWings access
remotely unless the Leaf was powered-up. But the same can be achieved until a viable update arrives by not accessing
the Leaf remotely via CarWings, which I presently do.

cwerdna
Gold Member
Posts: 7254
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sat Aug 12, 2017 11:48 pm

lorenfb wrote:
LeftieBiker wrote:Is it possible to either wire in a remote On/Off switch for the TC unit's power, or to relocate the power supply to a circuit that's only live when the car is on?


That could possibly be done if one had access to the Leaf's wiring diagram. To start with, hopefully someone has taken
a picture of the location of the TCU and its electrical connector. Once that was done, obviously no CarWings access
remotely unless the Leaf was powered-up. But the same can be achieved until a viable update arrives by not accessing
the Leaf remotely via CarWings, which I presently do.

viewtopic.php?p=385507#p385507
viewtopic.php?p=148255#p148255

When I still had the 2G TCU and changed the cabin air filter by removing the whole glove box, I recall seeing a box (too bad I didn't take a pic) from Continental that had an IMEI (which made me suspect it was the TCU) and other numbers on it. I recall it looked like what Ingineer posted.

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

LeftieBiker
Posts: 7344
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sun Aug 13, 2017 2:30 am

My thought was to wire in a remote power switch, turning the device off when the car would be sitting for more than a day, and leaving it on when the TCU was expected to be needed.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

GerryAZ
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Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sun Aug 13, 2017 5:58 am

LeftieBiker wrote:My thought was to wire in a remote power switch, turning the device off when the car would be sitting for more than a day, and leaving it on when the TCU was expected to be needed.


If you are really concerned when the car will be parked for extended time, just pull the fuse that supplies power to the telematics control unit.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

User avatar
eddiebo924
Posts: 34
Joined: Thu Aug 14, 2014 12:11 pm
Delivery Date: 01 Sep 2014
Location: Firestone, CO

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sun Aug 13, 2017 6:01 am

lorenfb wrote:But the same can be achieved until a viable update arrives by not accessing
the Leaf remotely via CarWings, which I presently do.


lorentfb,

Are you saying that while the car is sitting, if you don't try to ping it using CarWings things should be fine?

Thanks!
2015 LEAF SL / 30 Solar panels on the roof keeping the LEAF charged
Eddie B.
Firestone, CO

lorenfb
Posts: 1405
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sun Aug 13, 2017 9:41 am

eddiebo924 wrote:
lorenfb wrote:But the same can be achieved until a viable update arrives by not accessing
the Leaf remotely via CarWings, which I presently do.


lorentfb,

Are you saying that while the car is sitting, if you don't try to ping it using CarWings things should be fine?

Thanks!


Yes, for the last 6 months I haven't used CarWings and no problems, even when I update the charging stations.
Previously when using CarWings, the TCU would 'hang' requiring a reset by disconnecting its power via a fuse.
It's likely that if left in that mode, the TCU won't power-down causing excess current drain on the battery when the
Leaf is powered-off. Not only may the TCU cause an excess current drain, but it could 'keep-alive' a CAN bus,
resulting in potentially other ECUs from entering their 'sleep' mode (power-down) causing more current drain.

LeftieBiker
Posts: 7344
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Sun Aug 13, 2017 12:00 pm

GerryAZ wrote:
LeftieBiker wrote:My thought was to wire in a remote power switch, turning the device off when the car would be sitting for more than a day, and leaving it on when the TCU was expected to be needed.


If you are really concerned when the car will be parked for extended time, just pull the fuse that supplies power to the telematics control unit.


Not everyone would want to be pulling a fuse if they could flip a switch.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

User avatar
VinceMH
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Joined: Sun Dec 25, 2016 7:12 pm
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Leaf Number: 339157

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Mon Aug 21, 2017 12:18 pm

I wanted to confirm what some others have said about telematics causing a dead battery...

About a month after the TCU upgrade, my battery went dead. I bought a brand new battery. A month or so later, battery dead again. Brought it back to Batteries Plus and they said it had 5 amps! Charged it, dead again two days later. I remembered that both times the problem started after trying to access my 2013 Leaf via NissanConnect mobile app and getting a 'connection failed' message. After reading a few posts here, I decided to turn off all transmission/communications options in the car and NOT use my mobile app. No problems since then. I got a battery tender and mounted it under the hood. I plug it in once a week or so, just in case. Also got a portable jump starter that is very small and fits in the charging cable bag.

Schumacher SE-1-12S-CA Fully Automatic Onboard Battery Charger - 1.5 Amps
http://a.co/cQ4OYBf

DB Power 300 amp portable jump starter
http://a.co/2XH8qbJ
2014 LEAF SV
EVSE Upgrade
TCU Upgrade
Bought off lease Dec 2016
31k miles, 11 bars
Love not feeding diesel to the Ram monster truck!

AP0LL0
Posts: 1
Joined: Wed Oct 04, 2017 3:49 pm
Delivery Date: 01 Oct 2013

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Wed Oct 04, 2017 4:06 pm

The TCU is it!
Just returned from our NorCal Nissan dealership, car was there for almost 5 days, while the team of technicians diagnosed the car and tried to find where the power drainage is coming from.
Today, i've found this thread with the information on the TCU and forwarded it to the service manager. they consulted with Nissan support line which suggested "Remove the TCU fuze from the car and check if the drainage goes down" lo and behold, the upgraded TCU was the root cause. Nissan service rep mentioned that during a conversation with the national service desk they were told that Nissan acknowledges the issue and there will be a recall for the upgraded TCU units for the 2013 model.

For those of you that are having the 12V battery drainage issue, use the following steps to disable the TCU from sending data to Nissan:
1. use the Zero Emissions button to the bottom right corner of the media console
2. go to Carwings
3. Settings menu
4. Using the right scroll bar, scroll all the way down to " Vehicle Data Transmission Setting" and tap on it.
5. select "Decline"

This will prevent the TCU from sending data to Nissan, the downside of it is that the mobile app(s) will not work as well.
The system will continue prompting to enable data transmission, just hit decline and move on.

Hope this helps others that might encounter the issue with 12V battery.

medikit
Posts: 10
Joined: Tue Jul 29, 2014 5:00 pm
Delivery Date: 04 Jun 2014

Re: 2013 Leaf - Dead 12-Volt Battery every 2 Weeks

Mon Nov 13, 2017 6:18 am

AP0LL0 wrote:The TCU is it!
Just returned from our NorCal Nissan dealership, car was there for almost 5 days, while the team of technicians diagnosed the car and tried to find where the power drainage is coming from.
Today, i've found this thread with the information on the TCU and forwarded it to the service manager. they consulted with Nissan support line which suggested "Remove the TCU fuze from the car and check if the drainage goes down" lo and behold, the upgraded TCU was the root cause. Nissan service rep mentioned that during a conversation with the national service desk they were told that Nissan acknowledges the issue and there will be a recall for the upgraded TCU units for the 2013 model.

For those of you that are having the 12V battery drainage issue, use the following steps to disable the TCU from sending data to Nissan:
1. use the Zero Emissions button to the bottom right corner of the media console
2. go to Carwings
3. Settings menu
4. Using the right scroll bar, scroll all the way down to " Vehicle Data Transmission Setting" and tap on it.
5. select "Decline"

This will prevent the TCU from sending data to Nissan, the downside of it is that the mobile app(s) will not work as well.
The system will continue prompting to enable data transmission, just hit decline and move on.

Hope this helps others that might encounter the issue with 12V battery.


Will try this. I upgraded my TCU in December and starting having issues in the Spring. Took it to the dealership and they said the battery was dead but in good health. I replaced my 12V battery at that time anyway which worked for 5 months and then died again in October. It died again last night so I purchased a charger, charging overnight. Car started fine this morning. Will turn off the Carwings setting later today.

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