Black2014SL
Posts: 9
Joined: Sun Feb 25, 2018 5:02 pm
Delivery Date: 01 Feb 2018

L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 5:36 pm

I bought a 2014 SL a few weeks ago. I was charging it with the 120v charger it came with for first week until my AeroVironment L2 EVSE https://www.amazon.com/Nissan-LEAF-EV-Charger-Plug/dp/B01N6BER55/ref=sr_1_8?ie=UTF8&qid=1519604489&sr=8-8&keywords=aerovironment+leaf+charger came in and I was able to get a 50amp circuit ran off the main breaker box. Charging with the 120v I never had an issue. I installed the L2 a couple weeks ago and at first it would charge fine. As in, it would charge to 100%, the 3 blue lights on the car would be solid for a few minutes then shut off, then the EVSE would go from charging to ready to charge state. I could leave it plugged in and it would stay in the ready to charge state.

Starting last week I went in the garage and I could hear the EVSE tripping back and forth from charging" to "ready to charge" state every 5-10 seconds. This seemed very odd to me and I would just go push the stop button, check the car and very it got 100% charge. About 3 days ago I went to drive the car and it was flat out dead. Door locks, nothing would work. I found the 12v battery was dead. It looked factory but I threw it on my charger anyways and it would never charge back up. I went and bought a optima yellow top 51r and put that in. Everything seemed great, even the L2 charger shut off (went in to ready to charge state) when the leaf hit 100% and it stayed off. I had heard a bad 12v battery could cause this issue where the charger won't shut off when it gets to 100% so I figured this was the fix.

Well I still have this problem. I've only had the new 12v battery for 3 days now. It tests just fine, as it should. But I am still having the issue where I plug in my L2 EVSE and the leaf will charge to 100%, but the EVSE keeps changing states between ready to charge and charge every 5-10 seconds. From what I understand, the EVSE just supplies power, and the charger is built in the car. Once the car gets 100% charge it will still "charge" for a bit as it balances the cells. But then the charger stops, and therefor the EVSE should go into a standby state and stay there.

Today I thought I'd try the 12v reset and disconnect the ground for 5 minutes. Then I went for a drive and took about 30% off the battery and came home. I plugged in the L2 and it starts charging just fine. I would check on it every 10 minutes or so and I could see the charging light on the EVSE start to flash quicker which means its close to full charge. After about 2 hours the 3 dash lights on the leaf were fully lit and the car read 100% charge. However the EVSE went from having the charging light flashing, to it just being solid lit as it if was still charging. So I let it sit another hour and no change other than the 3 blue lights shut off indicating its not charging. Although the EVSE charging light is lit and my electric current detector pen goes off when I touch the cable meaning its got power going to the car.

So I have stopped it and I have hooked the 120v charger up to it even though it has 100% charge. (Edited after posting) Just after posting this the 3 dash lights are now off and the L1 charger is in standby state. So it seems to be the issue is just when I charge with my L2 charger.

I'm not sure how public L2 chargers work, but when I was at work I plugged it in to charge on their L2 charger. I was busy and never got around to moving the car after 4 hours so it sat there on the charger for 8 hours. I noticed the charging station charged me for the full 8 hours. I'm not sure if this meant the car was charging that long or if it just charged me because I never took it off the charger. Did it keep charging because my L2 on the car is having issues?

The next time I have it on the L2 and it starts flipping back in forth from charging to ready to charge, I will take a quick video and post it.

Any suggestions on what I should take a look at? My bluetooth OBDII is late from Amazon so I can't get any leafspy readings yet. Hopefully by tomorrow.
2014 SL 40,128mi. Purchased Feb 1, 2018
AHr=58.91 SOH=90.07% 395.77V Hx=87.52% 37QCs & 1248 L1/L2s, 256GIDs

LeftieBiker
Posts: 8646
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 5:56 pm

It sounds like you have a defective L-2 unit.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Black2014SL
Posts: 9
Joined: Sun Feb 25, 2018 5:02 pm
Delivery Date: 01 Feb 2018

Re: L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 6:07 pm

I know L1 and L2 use the same port on the car. So does that mean that if the L1 charger works as it should, the L2 should as well and that rules out an issue with the car? Or is there a separate component inside the car that L2 uses that L1 does not? Just trying to 100% rule out an issue with the car.
2014 SL 40,128mi. Purchased Feb 1, 2018
AHr=58.91 SOH=90.07% 395.77V Hx=87.52% 37QCs & 1248 L1/L2s, 256GIDs

baustin
Posts: 614
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 8:54 pm

Black2014SL wrote:I know L1 and L2 use the same port on the car. So does that mean that if the L1 charger works as it should, the L2 should as well and that rules out an issue with the car? Or is there a separate component inside the car that L2 uses that L1 does not? Just trying to 100% rule out an issue with the car.


There is only one charger in the car. If it works fine with the Level1 EVSE or with other Level2 EVSE units, then the car should be okay. As already suggested, it is most likely that your new Level2 EVSE is defective.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

Black2014SL
Posts: 9
Joined: Sun Feb 25, 2018 5:02 pm
Delivery Date: 01 Feb 2018

Re: L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 9:56 pm

Thank you for confirming that. I have already ordered a replacement and am getting a refund on this one. I'm guessing in my situation the car keeps telling the EVSE to shutoff and it's trying but fails and trips back to charging then finally goes into fault state. The thing that worried me is the EVSE at my work didn't shut off after car was full when I used it (I've only used it once and it's my first time ever at a pay charger). And by shutoff I mean it didn't stop charging me per hour. That must be their way of saying don't hog the EV spot?

Replacement EVSE will be here Tuesday. Will update then. Thanks for the feedback baustin and LeftieBiker!
2014 SL 40,128mi. Purchased Feb 1, 2018
AHr=58.91 SOH=90.07% 395.77V Hx=87.52% 37QCs & 1248 L1/L2s, 256GIDs

LeftieBiker
Posts: 8646
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: L2 EVSE doesn't shut off when leaf is fully charged

Sun Feb 25, 2018 10:18 pm

No problem.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GlennD
Forum Supporter
Posts: 1299
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: L2 EVSE doesn't shut off when leaf is fully charged

Mon Feb 26, 2018 11:46 am

Basically if it works properly on L1 then it should work the same on L2. The car only analyzes the pilot. It could care less about the voltage L1 and L2 are EVSE distinctions only, not the cars.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

Levenkay
Posts: 463
Joined: Mon Sep 26, 2011 10:01 pm
Delivery Date: 16 May 2013
Leaf Number: 302737
Location: Portland, OR

Re: L2 EVSE doesn't shut off when leaf is fully charged

Mon Feb 26, 2018 10:23 pm

The car does care about the voltage; that's the reason why, when you plug in with an active timer set to delay charging, the car temporarily switches the EVSE on. That gives the car an opportunity to see what the supply voltage is, so it can work backwards from a programmed "be charged by" time to decide when to have the EVSE switch on "for real". Every evening while I was commuting, I'd hear the "ka-chack,.. ka-CHUNK" cycle as my LEAF discovered, for the five hundredth time, that the EVSE at my garage's grid coordinates was a 240V installation, and then went to sleep for the night.

The power conversion task of generating 350-ish VDC battery voltage from a 120VAC source is a little different from the task of generating it from 240V. Not horribly different; they both call for voltage step-up. But it's conceivable that just one of the two regimes would stress some marginal component in the power converter enough to cause a problem. Switches would have to stay ON for higher duty cycles on 120VAC than they would on 240; maybe there's a pulse transformer whose core saturates too early, or a transistor that overheats. Or maybe the higher supply voltage at 240V (plus who-knows-what local line noise) is too much for a capacitor or a transient-clamping component.

Weird stuff happens, and not just in software.

GlennD
Forum Supporter
Posts: 1299
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: L2 EVSE doesn't shut off when leaf is fully charged

Tue Feb 27, 2018 11:27 am

If your Leaf is like mine or my eGolf it only cares about current. On both cars I tested the 120VAC current and in violation of the J1772 spec they happily charged at their maximum current. The spec limits L1 current to 16A max but the car does not care.

I have not tested my B250e so I can not say what the Tesla charger does.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

Black2014SL
Posts: 9
Joined: Sun Feb 25, 2018 5:02 pm
Delivery Date: 01 Feb 2018

Re: L2 EVSE doesn't shut off when leaf is fully charged

Tue Feb 27, 2018 9:21 pm

I got the replacement EVSE in and swapped it out. Started charging the car today on it, no problem. The car got to 100% and the 3 blue dash lights went solid for a few minutes then shut out. But the Charging Vehicle light is still on the EVSE and flashing every few seconds. It's been doing this for about an hour now after the charging lights on the Leaf dash went out. It should have stopped by now.

On LeafSpy I cleared all the DTC but there are a few that keep coming back instantly after clearing them.

B29C1 9409 CHARGER EVSE VC-98

P3171 000B EV/HEV PD Module System EVC-241
P3170 000B EV/HEV PD Module System EVC-241
P316C 000B EV/HEV PD Module System EVC-238

I have read about people with similar issue and software update resolved it. Anyone have any ideas what is going on with my leaf?

My battery stats are as follows: AHr=58.91 SOH=90.07% 395.77V Hx=87.52% 37QCs & 1248 L1/L2s, 256GIDs
Overall in good shape I think?
2014 SL 40,128mi. Purchased Feb 1, 2018
AHr=58.91 SOH=90.07% 395.77V Hx=87.52% 37QCs & 1248 L1/L2s, 256GIDs

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