dcarleaf
Posts: 12
Joined: Sat Mar 05, 2016 2:54 pm
Delivery Date: 04 Mar 2013

Re: 12v battery dies repeatedly

Tue May 30, 2017 7:34 am

jlv-Yes I've had the TCU updated.

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

Re: 12v battery dies repeatedly

Thu Jun 01, 2017 2:38 am

If something happens such that the updated TCU does not communicate through the cellular system to the Nissan servers, it may keep CAN bus communications active so that some of the modules (including the TCU) fail to go into low power sleep mode. This may also prevent the automatic (periodic) charging of the 12-volt battery from the traction battery while the car is parked. There is no issue if the car is driven frequently, but a dead 12-volt battery when it is parked too long. Look at the threads on telematics upgrades for more information.
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

dcarleaf
Posts: 12
Joined: Sat Mar 05, 2016 2:54 pm
Delivery Date: 04 Mar 2013

Re: 12v battery dies repeatedly

Thu Jun 01, 2017 3:26 am

Will check that out. Thank you.

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jlv
Posts: 496
Joined: Thu Apr 24, 2014 6:08 pm
Delivery Date: 30 Apr 2014
Leaf Number: 424487
Location: Massachusetts

Re: 12v battery dies repeatedly

Thu Jun 01, 2017 10:36 am

dcarleaf wrote:Will check that out. Thank you.
Look in this thread, starting near the end (page 68 or so): http://www.mynissanleaf.com/viewtopic.p ... &start=660
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kevmk81
Posts: 25
Joined: Wed Mar 30, 2016 6:46 am
Delivery Date: 30 Mar 2016

Re: 12v battery dies repeatedly

Mon Jun 05, 2017 11:25 am

I had this same problem, and I'm noticing a lot of people are based on just this first page of threads. My battery kept draining. I don't recall where I read this, or how I even figured it out, but at one point I was doing the suggested battery tender every day and charging the 12 v. I bought an AGM battery as well hoping it would make it better. But it didn't the battery kept draining.

Then I finally figured it out. The problem was, when I'd park the car, I opened the door before fully turning off the vehicle. Apparently that leaves something "on". Since then, I make sure to turn the car off before I open the door!! Crazy... since doing this, I haven't battery tended the 12v - not even once. It's been mooooonths since figuring it out. Hope that helps!

LeftieBiker
Posts: 6772
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12v battery dies repeatedly

Mon Jun 05, 2017 2:05 pm

I always turn my Leaf off before opening the door, and while my experience with 12 volt battery drain wasn't extreme, it did almost kill the battery after just a year. I don't believe that the door issue is the only problem.
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.

BrockWI
Posts: 527
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Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: 12v battery dies repeatedly

Tue Jun 06, 2017 8:59 am

hmmm, I will have to pay attention to the door issue. We regularly have the kids in the car and they often hop out as soon as the car stops moving and is in park (unlocks the doors) but before the car is off. Often becasue I am resetting the trip odometer or resetting some other setting.
3 kw solar pv - XW6048 - 8 L16's
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2013 S model with QC package Mar of 2013

JRoque
Posts: 36
Joined: Sat Jul 11, 2015 4:44 pm
Delivery Date: 29 Jun 2015
Leaf Number: 406755
Location: Miami, FL

Re: 12v battery dies repeatedly

Thu Jun 08, 2017 4:33 pm

Hi all,

I understand there's a different thread on this topic but that one's already way too long.

About 2 weeks ago, I woke up to a dead car. I "jumped" it for a few mins and it worked fine for the day. A few days later, same thing. Again, jump and go. Starting this Saturday, the darn car has drained the 12V battery all but one day. On Sunday, I purchased a new 12V battery - manufactured in May - and installed it. The next day the car was out again, and 3 more consecutive days after that.

I just put a voltmeter on the 12V battery and got this:

- While EV charging to 100% = 14.2V
- At rest, 10 mins after charge completed = 12.132V, already too low
- Removed the 12V neg terminal, inserted an ammeter = after an initial spike of 2.7A when first reconnected, it settled to 165mA draw.
- Disconnected the 12V battery completely and after 10 mins, it had sprung back up to 12.6V

I'm not sure what is normal in this car but 165mA seems high to me and it would kill the 12V battery in no time unless the DC-DC converter recharges it - which evidently does not happen. I have the battery on a separate charge now and will charge it for 12 hours to try again. BTW, the original battery I removed from the car recharged fine and it rests at ~12.8V.

I have only had 12V battery issues when stupid Carwings doesn't work and it hasn't worked for me solidly since June 1st. I have a call into Nissan for a related but different issue (plugged and charging status not showing in app/website) and have told them several folks here have complained about the same. I'm sure they jotted that down on their block of ice so they don't forget. Two weeks after reporting my issue to Nissan, the status has always been "escalated, no news from L2 support".

JR

JRoque
Posts: 36
Joined: Sat Jul 11, 2015 4:44 pm
Delivery Date: 29 Jun 2015
Leaf Number: 406755
Location: Miami, FL

Re: 12v battery dies repeatedly

Fri Jun 09, 2017 1:29 pm

Hi all,

Update to my previous post.

I charged the 12V battery to 13.5V overnight, installed it this morning, drove a few miles, no issues. A few minutes ago, I hit the 'refresh' button on the Carwings webpage and it loaded the EV battery percent charged. This had not happened in over a week.

To confuse matters, the Carwings webpage failed the first time I tried to load it with a "sorry, under maintenance" type of message. For this reason, I don't know if the status updated because my 12V battery was fully charged overnight - as some have suggested that is needed - or if it did because Nissan fixed something with their site.

BTW, the plugged-in / charging status is still not updating so that remains an issue. I suspect something is wrong with my record in Nissan's database that prevents that status from showing on the site or phone app. All else, including command to start charging the car or turn climate control on, works fine.

JR

arnis
Posts: 713
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Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: 12v battery dies repeatedly

Fri Jun 16, 2017 9:53 am

If you want to measure battery at rest you have to disconnect terminal and wait an hour.

165mA load is expected as vehicle is not in sleep mode.
Any door/OBD device/pedal/button action will wake vehicle up again. It takes few minutes until it falls asleep.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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