danbertolet
Posts: 12
Joined: Fri Dec 25, 2020 6:20 pm
Delivery Date: 26 Dec 2020
Leaf Number: 006357

Still getting 12V error with new 12V battery

Fri Dec 25, 2020 6:32 pm

Hi all, newbie here, searched the archives, sorry if I missed a thread where this was already covered...

Short story:
- Replaced 12V battery.
- Car went into ready mode as normal, showing 3 bars of charge and 20 mile range.
- Turned car off, plugged in standard 110V trickle charger and first blue charge light started blinking as normal.
- Came back 5 hours later, all blue charge lights off.
- Car won't go into ready mode, display shows little red 12V battery error light and zero charge on the main battery.
- Battery still has 12.6V. Headlights, tail lights and all interior electrical stuff seems to function normally.
- Tried disconnecting battery to reset system, but still got same result as shown in the pic.

Thoughts on what's wrong, anyone? I've done some reading on the interwebs and I understand now that 12V management is a common issue, but I haven't come across the exact problem I'm having.

Longer story:
I bought the car 3 months ago and everything has worked perfectly until now. It has a replaced main battery with 12 bars. Five days ago the same scenario I described above happened with the old 12V battery. I hooked up the trickle charger like normal, came back about 20 hours later to find the car unable to go into ready mode, with the display as described above. Measured 12.1V with everything off, dropping to 11.7V with the car "on." Tried jumping off a running car that was putting out 14.4V, after around 10 minutes it still wouldn't go into ready mode, either while still connected or right after disconnecting the jump. Date stamp on the battery said it's 8 years old, and we were having the coldest temps of the year (in Seattle, so cold means 32ish), so I figured it was a good bet a tired old battery was the problem. Put the new battery in, everything looked good and normal, thought the problem was solved, but then after 5 hours of trickle charge it has the same problem it had with the old 12V battery (as described above in the "short story").

I just picked up an adaptor to run LEAFSpy but haven't tried it yet (sorry, it's Christmas and it's raining!). What should I look for when I hook it up?

Any and all ideas and suggestions greatly appreciated!

LeftieBiker
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Delivery Date: 30 Apr 2018
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Re: Still getting 12V error with new 12V battery

Fri Dec 25, 2020 11:18 pm

I seem to recall an issue with traction battery replacement that may be related. If the new battery doesn't match the battery warmer and other configuration specifics of the old battery, there can be a substantial 12 volt charging issue. I'm afraid I don't remember the details, but the post is here...somewhere.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
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Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Still getting 12V error with new 12V battery

Fri Dec 25, 2020 11:32 pm

It sounds like the 12V battery is not charging while the traction battery is charging so then charging stops when the 12V battery gets too low. Your new 12V battery is OK after it is charged since you show 12.6 and accessories all work. Hopefully, Leaf Spy will give some clues. I remember something about the battery heater issue for 2011 and 2012 models that LeftieBiker described, but don't remember all of the details. The cold weather package (which included traction battery heater) was introduced late in 2011 production. This means there were 2 different replacement traction batteries to fit 2011 and 2012 Leafs. If the wrong battery was installed, then the missing heater or heater present when not required (not sure which) would cause issues like you describe. Maybe the issue is also related to temperature so it only shows up when temperatures are low.
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

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Stanton
Posts: 2271
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
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Re: Still getting 12V error with new 12V battery

Sat Dec 26, 2020 7:54 am

The following details would help:
1) exact year/month (model) of your Leaf
2) when was the traction battery replaced (miles?)

Depending upon the answers, @GerryAZ may be right...or it could be something else. LeafSpy will definitely help with diagnostics, but this may ultimately require a trip to the dealer (that replaced the traction battery)...depending on your answers.
Also, you may want to update your profile (delivery date) per #1 above.
2011 Blue Ocean SV w/floor mats & window tint
Lithium Pros 12v LiFePO4 battery w/Antigravity Battery Tracker
FIAMM 74100 horns
Wet Okole seat covers
Tor's low-power heater mod
2013 sun visor
Battery Pack replaced (Rev E) @51 months and 41k miles

nlspace
Posts: 270
Joined: Mon Jun 05, 2017 10:21 pm
Delivery Date: 06 Jun 2017

Re: Still getting 12V error with new 12V battery

Sat Dec 26, 2020 8:38 am

Don't trust that just because it is a new aux battery, that it is fully charged. Put a charrger on it and verify that it is fully charged before trying to start your car or charge your pack. 12.6 is way too low for a new battery; it started one time but didn't have enough to continue without re-charge, which it never got.

Lead acid begins to sulfate quickly when the voltage is left low, and a good sustained charge at 14.4 is needed to de-sulfate the plates and restore capacity as much as is possible after being damaged.

It may require several cycles of clearing DTC errors caused by a low aux battery before the car recovers, been there and done that. Good luck to you.

danbertolet
Posts: 12
Joined: Fri Dec 25, 2020 6:20 pm
Delivery Date: 26 Dec 2020
Leaf Number: 006357

Re: Still getting 12V error with new 12V battery

Sat Dec 26, 2020 10:53 pm

I read my error codes with LEAFSpy, screenshot linked below.

Can anyone help me interpret? Thank you!

http://citytank.org/images/IMG_E5809.jpg

LeftieBiker
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Re: Still getting 12V error with new 12V battery

Sun Dec 27, 2020 1:54 am

You have many of the codes associated with low 12 volt battery voltage. You also have some that are not, and are charging system related. An example of the latter are the 'isolation fault' codes, which indicate an internal short - although there may not be one, depending on the reason for the fault. I also don't think that the charging port faults are accessory voltage related...
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
Gold Member
Posts: 2764
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Still getting 12V error with new 12V battery

Sun Dec 27, 2020 3:13 am

Make sure your new 12V battery is fully charged and then clear error codes with Leaf Spy. Disconnect 12V battery for a few minutes, reconnect battery, then clear codes with Leaf Spy. If car does not function correctly after this procedure, then post a screenshot of the remaining error codes so we can offer more suggestions.
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

danbertolet
Posts: 12
Joined: Fri Dec 25, 2020 6:20 pm
Delivery Date: 26 Dec 2020
Leaf Number: 006357

Re: Still getting 12V error with new 12V battery

Sun Dec 27, 2020 12:51 pm

I cleared all error codes with LEAFSpy. Then car started as normal, drove it 5 minutes, parked it at home again, turned it off, then back on, now won't go into ready mode, and has two error codes:

P31E7 00C0 EV/HEV Restart Inhibition EVC-310
P0AA6 00C0 EV/HEV Hybrid Batt Volt Sys Isolation EVC-157

Screenshot here:

http://citytank.org/images/IMG_E5815.jpg

Thanks everyone!

(Is there a way to insert images directly in posts?)

GerryAZ
Gold Member
Posts: 2764
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Still getting 12V error with new 12V battery

Sun Dec 27, 2020 6:59 pm

It appears that you have a traction battery ground fault. Since the battery is normally completely isolated from chassis ground for safety, a single ground fault will not cause a high discharge current. The car has sensors to to monitor for high resistance ground faults and shut things down before serious damage occurs. A single ground fault will not cause a short circuit so the sensors and controllers allow the car to continue to operate until turning it off and will then prevent restart. You can likely clear the codes to make the car start again, but the cause of the battery ground fault needs to be found and corrected.

You can add images directly into posts if you are a forum supporter (pay annual membership fee).
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

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