[dernotte]

If the warranty is over, you probably have a model with 2 batteries. Did he tested both ? Probably another 12v battery issue.

 

[dernotte]

Still on my original 12v battery on my Oct 2018 model… but I got the gateway + other ECU update to properly manage the 12v, even when the car is off. And by the way, I still have my original 12v battery on my 2014 Leaf as well.

 

[dernotte]

What app ? Are you talking about the update of the electronic module in the car that I mentioned ?

 

[dernotte]

The man loves to live dangerously!

I should have close my mouth on that day. Yesterday, I was not able to start up the car, hybrid battery problem, brake problem, etc... all sort of known problems. I checked the 12v batteries. Only 3v on the small one. I tried to trickle charge it for a couple of hours. It went up to 12v, but did not fix my problem. I think this one is dead now. I need to replace it. Anyone found an Exide EK151 on this side of the pound ?

 

[dernotte]

Update: I phoned the 4 dealers I have around (I consider myself lucky, compared to others on this forum) on a Jan 2nd, and found one with the JDE32902 in stock. A bit over priced, but compared to a EK151 that I can order over sea or across the border + shipping + border fee, plus the fact that I can have it in my hand right away and drive the car again within the next 2 hours, the decision was easy. The exchange was quite easy, less than 40 min probably. Here is some pics.

I confirm that the christmas tree I had in the dash, that prevented me from moving the car (the car could start in accesory mode, but as soon as I turn the car on, the car shut down automatically) was fixed by replacing the small 12v/14Ah.

 

[dernotte]

Nice! Given the excellent outcome I can poke fun at you now

"Still on my original 12v battery on my Oct 2018 model …. And by the way, I still have my original 12v battery on my 2014 Leaf as well."

That would be fair....
I hope that the battery in my Leaf will not die any time soon now... Probably easier to change and more commun to find as spare part.

 

[dernotte]

In my previous post I ststed that there was a warning before the 12 V battery failures. However, neither warning stated that it was the 12V battery that was about to fail. One was a traction battery fault. The other was a non-specific warning about the electronics failing.

In my case, no sign of failure. The day before the car was working nicely. I only had 1 warning a month ago about "break pedal feel reduce..." , only once, the warring cleared by itself on the next startup. I am out of warranty, so I did not want to call Jaguar, wait for towing, wait for the car, etc... I managed to buy the battery and install it myself. Way more efficient. I was able to call a few dealer to locate a battery in the neighbourhood, drive with my second car over there, buy the battery and install it in half a day.

 

[dernotte]

If you already have one, and you are handy enough to replace yourself, do it now, then can save some trouble later, in the dark, in the middle of nowhere, even if you have the spare battery with you, does not means you will be in good condition to replace it while travelling

 

[dernotte]

I changed it myself (posted some pics of the exchange in this thread, look post #17).
I did not do anything special prior to the change.

 

[dernotte]

Unfortunately, out of the 43ish modules in the car, only 3 or 4 are updated OTA, the other need to be updated by the JLR technician.
The reason ? I don't know. Tesla is able to update them all, JLR needs to go that way as well.

 

[dernotte]

No preliminary sign on my side. Working fine on one day, dead the next day.

 

[dernotte]

It seems I was due to change both battery. 3 weeks after the small one died, yesterday I had this symptom of flashing all warnings light, even when the car was off. I was thinking about a low voltage on the other battery and the module in charge of the flasher not able to operate properly because of low 12v.
I boost the main 12v, and everything get back to normal state. But this morning the car is completely dead. Can’t even open the door. So I manage to manually open the door, manually open the frunk, and test the main 12v. I read 4v. Completely dead. Now I need to find an new 99R/T4…

 

[dernotte]

Thanks @Ayepace .
I manage to find one this morning, and replace the dead one. I can confirm that 99R is a perfect fit to replace this battery. I should be good for a few years now....