Auto Stop/Start Stopped working.

[AlienGladiator]

I don't know if any of you saw my thread a year ago (https://www.jeepgladiatorforum.com/forum/threads/truck-wont-start.44982/) BUT, I also had the ESS/ASS problem in the beginning with my truck. I took it in, they charged the battery, I was on my way. 3 months after my battery was charged, it died. Wouldn't start at all. Took it to the closest dealership, they charged the battery and sent me on my way. 17 miles down the road heading home, it died at the stop light. Dash flickering until the battery drained entirely, everything died. Towed to that closer dealership, replaced both batteries AND fuse box. 1 year ago. Today, truck dies again, same way, same happenings for the most part. It's at the dealership again as it is still under warranty and hoping they fix it once and for all.

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[SargeDiesel]

I don't know if any of you saw my thread a year ago (https://www.jeepgladiatorforum.com/forum/threads/truck-wont-start.44982/) BUT, I also had the ESS/ASS problem in the beginning with my truck. I took it in, they charged the battery, I was on my way. 3 months after my battery was charged, it died. Wouldn't start at all. Took it to the closest dealership, they charged the battery and sent me on my way. 17 miles down the road heading home, it died at the stop light. Dash flickering until the battery drained entirely, everything died. Towed to that closer dealership, replaced both batteries AND fuse box. 1 year ago. Today, truck dies again, same way, same happenings for the most part. It's at the dealership again as it is still under warranty and hoping they fix it once and for all.

If you are not driving the vehicle daily, and it sits for a day or two sometimes , you will most likely have to keep a maintainer or fully charge it once a week... or most likely it will continue over time. Not sure of your exact problem, but you could bypass the AUX battery and run off the main. you wouldn't want to do this if you constantly want to use your ESS, but if you don't, there are ways to keep it from engaging therefore running the JT on a single battery without the ESS.

 

[AlienGladiator]

If you are not driving the vehicle daily, and it sits for a day or two sometimes , you will most likely have to keep a maintainer or fully charge it once a week... or most likely it will continue over time. Not sure of your exact problem, but you could bypass the AUX battery and run off the main. you wouldn't want to do this if you constantly want to use your ESS, but if you don't, there are ways to keep it from engaging therefore running the JT on a single battery without the ESS.

I actually have had my ESS/ASS disabled with my Tazer. It was disabled at the time of the truck first dying, the second time, and this time. I had them fix it initially because when researching the ESS/ASS problem, people said it could lead to bigger problems. Then I installed the proximity locks and LEDs into the truck and needed to set the truck to those settings so I got the Tazer and it turns off/disables my ESS/ASS at start up every time. My gripe is that my vehicle shouldn't entirely not operate after sitting for one day. Absolutely unacceptable.

 

[SargeDiesel]

I actually have had my ESS/ASS disabled with my Tazer. It was disabled at the time of the truck first dying, the second time, and this time. I had them fix it initially because when researching the ESS/ASS problem, people said it could lead to bigger problems. Then I installed the proximity locks and LEDs into the truck and needed to set the truck to those settings so I got the Tazer and it turns off/disables my ESS/ASS at start up every time. My gripe is that my vehicle shouldn't entirely not operate after sitting for one day. Absolutely unacceptable.

I understand completely..and agree. Even though you had the ESS disabled, it sounds like you still had your AUX battery connected..... there is a lot of drain on the JT while it sits, I believe it wakes up every hour.. and add proximity .. even more. it is unacceptable and I am not a fan of the tiny battery used in this parallel setup... I have been told by far more educated than me on this system, that the dead start will eventually happen if you do not keep the batteries at 100%.... I hope you get it figured out, make sure to let me know when you do.

 

[jebiruph]

I don't know if any of you saw my thread a year ago (https://www.jeepgladiatorforum.com/forum/threads/truck-wont-start.44982/) BUT, I also had the ESS/ASS problem in the beginning with my truck. I took it in, they charged the battery, I was on my way. 3 months after my battery was charged, it died. Wouldn't start at all. Took it to the closest dealership, they charged the battery and sent me on my way. 17 miles down the road heading home, it died at the stop light. Dash flickering until the battery drained entirely, everything died. Towed to that closer dealership, replaced both batteries AND fuse box. 1 year ago. Today, truck dies again, same way, same happenings for the most part. It's at the dealership again as it is still under warranty and hoping they fix it once and for all.

The reference to replacing the fuse box is a clue that you are blowing the N3 fuse. In this post I describe how it gets blown and what happens when it does. https://www.jeepgladiatorforum.com/...l-battery-system-operation.44028/#post-729742

 

[NGNERD]

Same here, I've been treating the JT with kids gloves, there are a lot of sufisticated systems packed in these vehicles and the electrical system is something not to be played with blindly.... the is A LOT of misinformation floating around and you have to read everything and sort through it. Nothing wrong with asking questions and learning to be able to figure it all out. you are on the right track... and definitely doing it right. I will say this, if @jebiruph gives you advice on the electrical system, you can take it to the bank 100%.

Agree @SargeDiesel , and I am grateful for the patient and positive support and comments from you and @jebiruph. So helpful / educational.

 

[ronnylee3rd]

I got in my truck one morning and that light was on. Dash said "unavalible service blah blah.." at start up. Truck had about 10k miles at the time. I actually found that one of the positive battery terminals was not tightened down completely. I tightened everything up and checked if all the fuses were seated right. Found a few things loose in the fuse box too. The light hung out for a while and it didn't go away until I cleared the code. I had a ~P00D3~ code... I cleared the code and the light went away. Hasn't returned yet. I have a feeling this won't be the last time I'll see him judging from this thread.

 

[AlienGladiator]

The reference to replacing the fuse box is a clue that you are blowing the N3 fuse. In this post I describe how it gets blown and what happens when it does. https://www.jeepgladiatorforum.com/...l-battery-system-operation.44028/#post-729742

Little update, got my truck back. They're saying this time my dash cam drained and killed the batteries. I asked about the last time my truck died, if they know what drained my batteries then because there wasn't a dash cam or any accessories hooked up at that time. Nope. And he says the fuse box replacement was probably from them trying to jump start the truck. I obviously have no real idea, but that's the information I received.

 

[GladiatorCruzen]

Mine has stopped working on my 2021 with 7k miles. Screen only says “Stop Start Not Ready” when driving. It doesn’t give a reason why. Already had to have rear axle replaced under warranty and now this. I’m concerned about the batteries issue and begun stranded. Worse would be stranded with top and doors off in remote area.

 

[ShadowsPapa]

Mine has stopped working on my 2021 with 7k miles. Screen only says “Stop Start Not Ready” when driving. It doesn’t give a reason why. Already had to have rear axle replaced under warranty and now this. I’m concerned about the batteries issue and begun stranded. Worse would be stranded with top and doors off in remote area.

That "stranded" bit is more scare than actual instances. Yes, it's happened to a handful, but it's not common, either. And if you know what you're doing, you can absolutely get them jumped and running.
If there's no reason, then it's possible the thing has a stored code that needs to be checked out.
People freak out over these and the odds are slim you'll be stuck.

If there's concern, founded or unfounded, do a proper full charge of each battery independently. Charge the aux battery with a proper AGM charger, or one that's AGM capable with an AGM setting.
Do the same for the crank battery.
After the charge, wait a few hours (battery grounds still disconnected and separated) and check the voltage of each. If it's not sticking around 12.7 there's an issue. Get them load tested.
And while doing the charging, disconnect the IBS to reset it. I pulled it off and sat it to the side while charging the batteries.
Doing all of that starts things at zero, it will quickly relearn. go from there.
Check your battery voltage with a meter - not using the numbers on the dash in the truck.

There's a whole list of things that have to be just right for ESS to function, if the ducks aren't in a row, it won't function.
ESS not working is generally a sign of a problem and ignoring that is what the real problem is. It will only show the detail of the issue for a short list of things - not for everything it checks like cat converter temperatures, and other sensor stuff.

 

[Wasatch1]

This story has gone on too long! LE Rubicon, worked 1 year great. Then drama. Dealer batteries replaced 1st time, 2nd stop just charged, say I'm not driving it enough!? High load camping with gear up canyon 80mph 9k elevation, then works for 1 week, then dead for months. I dont want to add a battery tender and plug/unplug daily for my own repair. This is a mess. Recall, recall, recall! 'Jeep we care' fix my dang truck!!!

 

[Dougstdig]

Mine has stopped working on my 2021 with 7k miles. Screen only says “Stop Start Not Ready” when driving. It doesn’t give a reason why. Already had to have rear axle replaced under warranty and now this. I’m concerned about the batteries issue and begun stranded. Worse would be stranded with top and doors off in remote area.

I won’t ask you to incriminate yourself, but if the drivers seatbelt is not latched it won’t activate.

 

[MojaveMat]

just realized I’ve been getting “start/stop not ready” probably for weeks but I just noticed. it’s colder now and I’ve been using my auto start which blasts the heat, seat warmers and steering wheel might be causing the drain? I drive 10 miles each way to work so it’s 15 min of driving each way. Probably not enough to charge the battery? A lot of people seem to keep having these issues. Is there a good aftermarket battery setup anyone recommends to never have to worry about this anymore? I’m under warranty but time is money and I’d rather not have to go to the dealership 3 or 4 times and be without the truck for days.

 

[ShadowsPapa]

I drive 10 miles each way to work so it’s 15 min of driving each way. Probably not enough to charge the battery?

Not likely to fully charge the batteries.

Yes, using the heated seats, fan, etc. takes power.

"Stop start not ready" without the "battery charging" isn't due to the battery being low.
"Stop/start not ready, battery charging" is what you get if the batteries are low and causing it to not work.
There are over 20 things that must be right for it to shut off at a stop light.

Here's the thing - if it's not working, there's something that's not right - saying simply "I'll replace batteries and ignore stop/start" is ignoring what's really causing it to not work.

Like ESS or not, it's a decent "diagnostic tool" - a clue that something isn't right.
Me - I'd want to know just what the trouble is. Otherwise, you are guessing, and it may not be battery related if there's no "battery charging" message with it.

A lot of people seem to keep having these issues.

All they have in common is ESS not working - the reasons and causes are many.
Even when battery related, the reasons and causes are usually many.
It's like saying "a lot of people were sick last year" - true, but the illness could have been dozens of things.
The issue could be SHORT DRIVES, maybe the IBS needs to be reset, maybe you have excess drain, maybe one of the batteries is aging badly (could be the main battery, could be the aux battery) could be any number of things.

 

[Vtur]

Mine also stopped working for a few weeks now. Displaying Battery is charging, a sign of the aux battery is going out. I'm replacing it before it take out the main battery.

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