Our Ariya died on Sunday morning. Was cleaning the interior ie had all the doors open for a good hour, went to close the tailgate & nothing tried to start the car dead blank dashboard. Traction battery was up around 90% earlier that day so it was ok. Tested the 12v battery in the boot it was down at 5vdc, in my opinion that's totally goosed. To get things going I applied old style battery charger to the 12 volt battery for 2 hours and bingo all was well again. Took it for a drive and measured 14.4 v across the battery which told me it was being charged by the traction battery. Next morning tested the battery at 11.7v, that afternoon had the doors open on the car for 15 minutes dead again.
Luckily both events have not stranded me.
Nissan advised I have to wait 8 days before they can take the car in as they are busy.
Ive told them the battery needs replacing so would love to think they are ordering one now so it will be ready for when they look at it in 8 days.
This is too close for comfort as in 11 days time im on vacation in a remote cottage in Scotland so...
Ive a bluetooth battery monitor on its way in the post
Ive also got a 60W 3Amp solar panel and charge controller on its way
I think we're going to have to hire a car as I just dont think there gonna resolve this in time
To top it off me mam (91 bless her) say's... sounds like they fitted a 2nd had battery in the factory
Mightily miffed to say the least
Ariya Evolve circa 19000mile
12v Battery Dead (like 5volts dead) Fault Resolved
Attached PDF
shows BM2 battery monitor in action today.
Im using the car to get too and from work without issue at the moment as long as i dont leave the doors open or pop the bonnet or use headlights
There are two issues here
The Inability for the battery to maintain voltage under load
but also why is popping the bonnet dropping the voltage massively whereas the headlights is more gradual.
Either way the battery needs replacing.
Ariya 12v Battery Discharge Fault.pdf- (1.73 MiB) Downloaded 129 times
Im using the car to get too and from work without issue at the moment as long as i dont leave the doors open or pop the bonnet or use headlights
There are two issues here
The Inability for the battery to maintain voltage under load
but also why is popping the bonnet dropping the voltage massively whereas the headlights is more gradual.
Either way the battery needs replacing.
Last edited by Glen Best on Wed Jun 05, 2024 5:48 pm, edited 1 time in total.
Im now wondering if that cliff edge drop off has anything to do with where i am measuring the 12v battery voltage. The BM2 Logger is connected between chassis and the 10mm bolt stud under the red plastic cover under the bonnet to the left hand side of the VSD/Inverter.
Today i carried out test using a DC volt meter measuring directly at the 12v battery terminals, I released the bonnet catch and the voltage dropped from around 11.8v down to around 10.8volt at which point i secured the bonnet back down else i may have had a flat battery again. The battery logger charted what I witnessed on the DC meter.
I repeated the same test on our other Nissan Ariya its DC battery kept the same level when the bonnet catch was released.
Tomorrow the car goes into Nissan dealer.
I repeated the same test on our other Nissan Ariya its DC battery kept the same level when the bonnet catch was released.
Tomorrow the car goes into Nissan dealer.
Car went into the Nissan Garage today.
I was able to demonstrate the issue to one of the EV technicians who was grateful for the detailed fault information.
With DM2 battery voltage monitor logging to my android phone and also DC Voltmeter with probes across the 12v battery I released the bonnet catch to demonstrate the problem.
At first attempt the battery voltage held up which I could not understand. The tech advised this could be due to too short a time since the car was running. So we closed the bonnet and tried again, this time the battery voltage dropped I then turned on the main beam to further load the battery which dropped further to the point 12v systems started to shut down and we had many errors on the dash all within 15 seconds time window.
So we had repeated the experience I had been having all week.
The tech agreed that a new battery would be needed but wanted to get to the root cause of the battery failing.
The next bit ive pieced together info so may not be totally accurate but here is the gist:
"When the bonnet catch is released either the Inverter or the dc-dc converter shuts down so that it is not live when you have the bonnet up and it could be the shutting down of this system part that is likey causing the overload on the battery, not the bonnet catch itself".
So whilst the above quotes makes a bit of sense I need clarification to make sure its factually correct.
As mentioned in an earlier post, charging from the traction battery works.
Nissan have advised the Battery and DC-DC Converter are to be replaced.
They have these on a next day delivery though will be fitted in 5 days time due to me not being available.
Thus far a very positive experience.
So it could be that if you have a very low 12v dc battery issue you could carry out a simple test of: DC Voltmeter across the 12v battery, release the bonnet catch and wait 1-2 mins and log the results. Though be warned it could render you stranded so at least have the tailgate open and a lead acid battery charger to hand.
I was able to demonstrate the issue to one of the EV technicians who was grateful for the detailed fault information.
With DM2 battery voltage monitor logging to my android phone and also DC Voltmeter with probes across the 12v battery I released the bonnet catch to demonstrate the problem.
At first attempt the battery voltage held up which I could not understand. The tech advised this could be due to too short a time since the car was running. So we closed the bonnet and tried again, this time the battery voltage dropped I then turned on the main beam to further load the battery which dropped further to the point 12v systems started to shut down and we had many errors on the dash all within 15 seconds time window.
So we had repeated the experience I had been having all week.
The tech agreed that a new battery would be needed but wanted to get to the root cause of the battery failing.
The next bit ive pieced together info so may not be totally accurate but here is the gist:
"When the bonnet catch is released either the Inverter or the dc-dc converter shuts down so that it is not live when you have the bonnet up and it could be the shutting down of this system part that is likey causing the overload on the battery, not the bonnet catch itself".
So whilst the above quotes makes a bit of sense I need clarification to make sure its factually correct.
As mentioned in an earlier post, charging from the traction battery works.
Nissan have advised the Battery and DC-DC Converter are to be replaced.
They have these on a next day delivery though will be fitted in 5 days time due to me not being available.
Thus far a very positive experience.
So it could be that if you have a very low 12v dc battery issue you could carry out a simple test of: DC Voltmeter across the 12v battery, release the bonnet catch and wait 1-2 mins and log the results. Though be warned it could render you stranded so at least have the tailgate open and a lead acid battery charger to hand.
Thanks for the report. Glad it helped with the dealer. I always take fault codes in at the time of issues, just to trend any common faults over time. DC to DC came up once only, but my Body control Modules came up quite a few times. Been replaced but taking over 6 weeks due to back order delays. Sigh !
A recap, last Friday Nissan diagnosed 12v battery and DC-DC converter need replacing, I advised I would limp by till Wednesday ie today.
On Saturday ie 5 days ago, the Ariya went flat on me right in the middle of being out and about, I used a jump pack to get up and running. Below is the BM2 log, you can see where the car has gone completely flat, this event was caused by opening the tailgate to put shopping in.
Since the above event the car has been ok!
Today Ariya has had replacement 12v battery and DC-DC converter fitted.
Collected the car and carried out a basic test of observing the BM2 logger whilst opening doors tailgate and bonet. 12 Volts remained stable, so far so good.
Overall I feel ive had good service from Nissan.
Definitely recommend having a jump pack in the car,
On Saturday ie 5 days ago, the Ariya went flat on me right in the middle of being out and about, I used a jump pack to get up and running. Below is the BM2 log, you can see where the car has gone completely flat, this event was caused by opening the tailgate to put shopping in.
Today Ariya has had replacement 12v battery and DC-DC converter fitted.
Collected the car and carried out a basic test of observing the BM2 logger whilst opening doors tailgate and bonet. 12 Volts remained stable, so far so good.
Overall I feel ive had good service from Nissan.
Definitely recommend having a jump pack in the car,
-
ashleycarr
- Posts: 154
- Joined: Fri Jun 10, 2022 4:39 pm
12v batteries keep popping up on other forums as a problem with EV's, maybe ICE too, I don't know. Regularly enough for me to get a jump pack to keep in the car, I like to tour with it so see it as a get out of jail free card. Needless to say since getting it I haven't needed it, yet. 15 months of almost completely trouble free motoring, just the annoying alarm going off occasionally when pre conditioning, since fixed with a software update. Otherwise can't fault it on anything major.
