Supersleeper
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Location: SF Bay Area

Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 11:27 am

Hi Folks,

Started my morning off with the NissanConnectEV app unable to get a battery status. Not thinking much about it, given the slow and buggy nature, I hopped into the car for the drive to work, and noticed a yellow triangle warning. Ran LeafSpy, and found P312a p3131 u1000. Once I got to work, I shut down, then powered back up. Yellow triangle was gone, but still can’t seem to get a battery status.

After work, I plan to do another diagnostics with LeafSpy, then pull the TCU fuse and see if that makes any difference. Not sure if anyone else has run up against this before? On a seemingly related incident, last week, I ran up on a failed scheduled charge, and had to drive to work knowing I couldn’t make it home. Fortunately we have chargers here at work as well. I haven’t seen the repeat incident of that yet, but when I plug it in, I ALWAYS wait until I hear the clunking of the solenoids before walking away.

Thanks in advance for any guidance or info

GerryAZ
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Location: Phoenix, AZ

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 12:21 pm

Yes, failure to update status or send charge complete messages are first clues that TCU is locked up. EV light goes out after driving, but it generally takes clearing DTCs, pulling fuse, and clearing DTCs again to completely cure my 2015. I have done it perhaps a half dozen times since getting TCU upgrade in December 2016.
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+ purchased 8/10/2019

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

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 12:30 pm

Supersleeper wrote:Not sure if anyone else has run up against this before?
Those set of DTC are indicative of the TCU locking up, which is backed up by you being unable to get battery status. Many, MANY people have run up against this; e.g. http://mynissanleaf.com/viewtopic.php?f ... 28#p486228

Definitely pull the TCU fuse and then clear the DTCs with Leaf Spy pro.
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18) 34K mi, AHr 58, SOH 87%
Tesla S 75D (3/17)
Tesla X 100D (12/18)
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cwerdna
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Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 2:12 pm

Yes. Fuse pull when the TCU stops responding to commands and queries.

After clearing P3131 via Leaf Spy Pro, to help mitigate the stupid yellow ! car and P3131 from coming back, do what I do at http://www.mynissanleaf.com/viewtopic.p ... 24#p515624. It seemed to help this guy: http://www.mynissanleaf.com/viewtopic.p ... 73#p516373.

I really wish Nissan would fix this crap.

I think I’ve gone many months now with a yellow ! car and P3131 ever since doing this. The TCU bad state/lockups still happen every now and then, but I do like being able to query charging status, receive charging complete notifications and send the commands.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Supersleeper
Posts: 124
Joined: Mon Aug 07, 2017 10:04 am
Delivery Date: 06 Aug 2017
Location: SF Bay Area

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 7:27 pm

Pulled fuse twice for 3 SEC each time. No dice. It can communicate from the car out, but not from the app in. Now has P31C2. This looks new.

GerryAZ
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Posts: 2356
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 8:46 pm

Supersleeper wrote:Pulled fuse twice for 3 SEC each time. No dice. It can communicate from the car out, but not from the app in. Now has P31C2. This looks new.
Once in a while, I have to disconnect the negative 12-volt battery cable. I have also pulled another fuse (related to the navigation/radio system along with the 20-ampere fuse that supplies the TCU. Also, try leaving the fuse out for longer time.
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+ purchased 8/10/2019

Supersleeper
Posts: 124
Joined: Mon Aug 07, 2017 10:04 am
Delivery Date: 06 Aug 2017
Location: SF Bay Area

Re: Yellow triangle light and P312a p3131 u1000 codes

Wed Mar 07, 2018 9:45 pm

GerryAZ wrote:
Supersleeper wrote:Pulled fuse twice for 3 SEC each time. No dice. It can communicate from the car out, but not from the app in. Now has P31C2. This looks new.
Once in a while, I have to disconnect the negative 12-volt battery cable. I have also pulled another fuse (related to the navigation/radio system along with the 20-ampere fuse that supplies the TCU. Also, try leaving the fuse out for longer time.
I meant to say 30 SEC. Anyway, had to pull the negative terminal, and resolved it instantly.

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jlv
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Location: Massachusetts

Re: Yellow triangle light and P312a p3131 u1000 codes

Thu Mar 08, 2018 9:51 am

Supersleeper wrote:Now has P31C2. This looks new.
P31C2 is also part of the problem (listed in the link I posted above).

Glad it's working for you now, but it's interesting that you needed to pull the negative terminal to get it to resolve. Are you getting text messages/notifications (on charging complete)?
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18) 34K mi, AHr 58, SOH 87%
Tesla S 75D (3/17)
Tesla X 100D (12/18)
91K 100% BEV miles since '14
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RelaxedGal
Posts: 7
Joined: Wed Apr 01, 2015 10:07 am
Delivery Date: 24 Nov 2018

Re: Yellow triangle light and P312a p3131 u1000 codes

Fri Mar 16, 2018 10:41 am

Weirdly, the fix recommended by my dealership was to uninstall and reinstall the NissanConnect EV & Services app on my Android phone. And that worked. Both times that I needed to do it.

For me the yellow triangle and car-with-exclamation-point were coming on every time I started the car after the car was supposed to notify me ; e.g. charge complete, or parked near a charger and not plugged in.
2012 Nissan Leaf SL
Purchased Feb 2015, 36,033 miles
First Bar lost: 39,879 miles, July 2015. Second: 50,225 & 8/16. Third: 62,960, 11/17. Fourth: 72,056, 11/18. Traded in the following weekend.

2019 Nissan Leaf SV
Purchased Nov 2018, 7 miles.

cwerdna
Posts: 10081
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Yellow triangle light and P312a p3131 u1000 codes

Fri Mar 16, 2018 5:31 pm

RelaxedGal wrote: For me the yellow triangle and car-with-exclamation-point were coming on every time I started the car after the car was supposed to notify me ; e.g. charge complete, or parked near a charger and not plugged in.
Try http://www.mynissanleaf.com/viewtopic.p ... 24#p515624. It's helped me. It seems to have also helped http://www.mynissanleaf.com/viewtopic.p ... 73#p516373.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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