simply
Posts: 13
Joined: Wed Feb 07, 2018 5:08 pm
Delivery Date: 07 Feb 2018
Leaf Number: 301514

2018 Leaf SL - Bad battery cell - "Service EV System Unable to restart after power off"

Thu Jul 12, 2018 6:15 am

Yesterday I received the following error when trying to start my 2018 LEAF SL

"Service EV System Unable to restart after power off"

I let the car sit for about five hours unplugged, came back to the car to start it and received the following error. I then unhooked the negative port form the battery for 10 mins hoping that it would clear the circuit. Still receiving the same error. Called Nissan roadside assistance and had the car towed back to the dealership. I will keep the group updated.

:evil:
Last edited by simply on Thu Jul 12, 2018 11:12 am, edited 1 time in total.
All Lease Leafs
2013-2015 White Pearl SL - 18,000miles/year - $377 per month $0 down
2015-2018 Blue S - 12,000miles/year - $255 per month $0 down
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simply
Posts: 13
Joined: Wed Feb 07, 2018 5:08 pm
Delivery Date: 07 Feb 2018
Leaf Number: 301514

Re: 2018 Leaf SL Tow - "Service EV System Unable to restart after power off"

Thu Jul 12, 2018 11:09 am

UPDATE:

Just got off the phone with the dealership. The dealer has stated that they need to replace two possibly three cells in the battery (I was informed there are 98 cells in the battery). The Leaf tech has opened up a Techline Case with Nissan and at the moment the service center is unsure how long the battery cell replacement will take in terms of time.
All Lease Leafs
2013-2015 White Pearl SL - 18,000miles/year - $377 per month $0 down
2015-2018 Blue S - 12,000miles/year - $255 per month $0 down
2018 Blue SL - 15,000miles/year - $533 per month $0 down
No response given to PMs

User avatar
RegGuheert
Posts: 6229
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: 2018 Leaf SL Tow - "Service EV System Unable to restart after power off"

Thu Jul 12, 2018 11:46 am

simply wrote:(I was informed there are 98 cells in the battery)
That's almost true. There are actually 192 cells in the Nissan LEAF, arranged in pairs that are in parallel, meaning there are 92 cells in series. In the 2018, these 192 cells are arranged in modules containing eight cells (four cell-pairs) each. The dealership can only measure cell voltages, which means they can only find problems at the cell-pair level. if they are seeing three bad cell pairs, that means they need to replace either one, two, or three of the 24 modules found in the LEAF battery.

BTW, to my knowledge no one have ever reported more than one cell-pair being bad, and that is extremely rare. I hope your case is not indicative of some sort of manufacturing defect in the new LEAFs.

Good luck getting your vehicle repaired properly and quickly.
RegGuheert
2011 Leaf SL Demo vehicle
10K miles: Apr 14, 2013, 20K miles (55.7Ah): Aug 7, 2014, 30K miles (52.0Ah): Dec 30, 2015, 40K miles (49.8Ah): Feb 8, 2017, 50K miles (47.2Ah): Dec 7, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

TheLostPetrol
Posts: 37
Joined: Thu Jul 13, 2017 8:19 am
Delivery Date: 21 Feb 2018
Leaf Number: 307105
Location: Greater Chicagoland

Re: 2018 Leaf SL Tow - "Service EV System Unable to restart after power off"

Fri Jul 13, 2018 3:57 pm

RegGuheert wrote:There are actually 192 cells in the Nissan LEAF, arranged in pairs that are in parallel, meaning there are 92 cells in series.

Or 192/2=96
2017-12-16 New Prius Prime
2018-02-21 Used pearl white 2015 LEAF SV Mfd 2014-07 In-service 2015-02-27
2018-02-21 26,938 mi AHr=60.22 SOH=96.98% Hx=90.73% 1 QC 988 L1/L2
2018-07-01 31,601 mi AHr=58.05 SOH=93.48% Hx=87.03% 11 QC 1223 L1/L2

User avatar
RegGuheert
Posts: 6229
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: 2018 Leaf SL Tow - "Service EV System Unable to restart after power off"

Sun Jul 15, 2018 2:29 am

TheLostPetrol wrote:
RegGuheert wrote:There are actually 192 cells in the Nissan LEAF, arranged in pairs that are in parallel, meaning there are 92 cells in series.

Or 192/2=96
Thanks!
RegGuheert
2011 Leaf SL Demo vehicle
10K miles: Apr 14, 2013, 20K miles (55.7Ah): Aug 7, 2014, 30K miles (52.0Ah): Dec 30, 2015, 40K miles (49.8Ah): Feb 8, 2017, 50K miles (47.2Ah): Dec 7, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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