Battery auto start/stop

[Brian.mdzzz]

A few weeks ago my jeep jl 2020 didnt turn on (no indicator on dash) (no codes on the tazer mini JL) Immediately went and changed both batteries to have a piece of mind. Jeep turned on and good to go. A week after a changed both batteries the indicator on the DASH was lit ?. Erased the code. A couple of days later turned backed on. Ive been driving my jeep just fine but the code keeps coming back (at least for 2 times) have not erased it since. Is it possible I might have a loose connection on the batteries. Jeep is running fine im confused. I was supposed to get that code way before I got dead batteries and didnt. Getting that code now thats its been fixed. Any suggestions?

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[BigMaCro]

Hello, and welcome to the Forum. Unfortunately you've posted under the 4xe hybrid section, so you may not get much notice here, as we don't have the same system in our Jeeps.

There is a lot of information on problems with the two battery systems, and batteries that will die and leave you stranded. See the following thread for help:

https://www.jlwranglerforums.com/forum/threads/3-6l-ess-dual-battery-consolidated-information.25377/

 

[Rhinebeck01]

A few weeks ago my jeep jl 2020 didnt turn on (no indicator on dash) (no codes on the tazer mini JL) Immediately went and changed both batteries to have a piece of mind. Jeep turned on and good to go. A week after a changed both batteries the indicator on the DASH was lit ?. Erased the code. A couple of days later turned backed on. Ive been driving my jeep just fine but the code keeps coming back (at least for 2 times) have not erased it since. Is it possible I might have a loose connection on the batteries. Jeep is running fine im confused. I was supposed to get that code way before I got dead batteries and didnt. Getting that code now thats its been fixed. Any suggestions?

@Brian.mdzzz

Sounds like when you changed out your Main battery that you inadvertently blew fuse N3 in the High Amp Fuse Array..... if N3 is blown, the alternator will not charge the Aux battery.

The Main and Aux are hooked up in parallel..... that Aux battery not being charged will negatively impact the dual battery system....

Also, IF you have been running the Tazer JL with the same firmware on it for months...
I doubt it is the Tazer JL. Yes, there is a small chance though .... and the Tazer JL should be unmarried and removed temporary. Unmarry and remove the Tazer JL. Update the firmware on the Tazer JL to the current firmware version.

In closing... There is no point in your replying to this post/in this thread, as this is a 4xe related thread.

Read here and elsewhere on the forum...

https://www.jlwranglerforums.com/fo...-cable-caution-and-ess-n3-fuse-warning.66247/

https://www.jlwranglerforums.com/forum/threads/alert-high-amp-fuse-array-related.65085/

https://www.jlwranglerforums.com/fo...ry-from-genesis-any-issues.74052/post-2220931

https://www.jlwranglerforums.com/forum/search/3947749/?q=n3+blown&c[users]=Jebiruph&o=date

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