Aux battery is still charging

[jmdwifi]

I always turn ESS off but left it on the other day and noticed it wasn't stopping. I was happy my negative thoughts on the system disabled it but scrolling through the menu, it says aux battery is still charging. It says that all the time and ESS does not work. I added a bumper and winch over Christmas and I don't know how long it's been like this. It looks like from searching that the aux battery has issues taking a dump. Will they cover it with a winch? I have only used it once and that's when I rolled the line up on the drum. The engine was running when I did it. I have 18k on the truck so far

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[jebiruph]

Does it says the aux battery is charging or just battery charging? As far as I know, there's no way to know if the aux battery is charging, it only knows through the battery sensor that the main battery is charging.

 

[Mr._Bill]

Take it to the dealer to have the batteries tested, and hopefully replaced under warranty.

 

[jmdwifi]

Does it says the aux battery is charging or just battery charging? As far as I know, there's no way to know if the aux battery is charging, it only knows through the battery sensor that the main battery is charging.

It actually says it's not available and the battery is still charging. The truck starts fine, so I am guessing it's the small aux battery. I will call the dealer and schedule a visit.

 

[hjdca]

Check this video out before going to the dealer.

 

[olecarguy]

I always turn ESS off but left it on the other day and noticed it wasn't stopping. I was happy my negative thoughts on the system disabled it but scrolling through the menu, it says aux battery is still charging. It says that all the time and ESS does not work. I added a bumper and winch over Christmas and I don't know how long it's been like this. It looks like from searching that the aux battery has issues taking a dump. Will they cover it with a winch? I have only used it once and that's when I rolled the line up on the drum. The engine was running when I did it. I have 18k on the truck so far

JDMWIFI, I have a 2020JT, delivered on 10/25, with 1600 miles. Most of these miles were put on in the 1st month since this is a 4th vehicle I currently have registered. Therefore, with it benign down for all the mods once the newness of the purchase subsided, I've only been driving it locally on a limited days per week. Right now, it can sit for 2-3 days before doing a local grocery run of 2-3miles. Initially, the Stop/Start worked all the time when not heating/cooling the cab. Then about 2 weeks ago I noticed the ESS wasn't working. Then yesterday, like you, when scrolling through the menus I came across the "Stop/Start System Disabled, Battery Charging" message. The vehicle starts/started fine, was charging at 14.7V. I too was contemplating stopping by the dealer to get the batteries checked. However, after driving it 38 miles at 40+MPH, the message when away and "ESS enabled" appeared and it began to work. Therefore, I would recommend driving it for about 45 minutes to see if the message changes.

 

[jmdwifi]

Check this video out before going to the dealer.

JDMWIFI, I have a 2020JT, delivered on 10/25, with 1600 miles. Most of these miles were put on in the 1st month since this is a 4th vehicle I currently have registered. Therefore, with it benign down for all the mods once the newness of the purchase subsided, I've only been driving it locally on a limited days per week. Right now, it can sit for 2-3 days before doing a local grocery run of 2-3miles. Initially, the Stop/Start worked all the time when not heating/cooling the cab. Then about 2 weeks ago I noticed the ESS wasn't working. Then yesterday, like you, when scrolling through the menus I came across the "Stop/Start System Disabled, Battery Charging" message. The vehicle starts/started fine, was charging at 14.7V. I too was contemplating stopping by the dealer to get the batteries checked. However, after driving it 38 miles at 40+MPH, the message when away and "ESS enabled" appeared and it began to work. Therefore, I would recommend driving it for about 45 minutes to see if the message changes.

I will try that. I have to go to Richmond today. 1 hr away. Thank you.

 

[JeepCares]

It actually says it's not available and the battery is still charging. The truck starts fine, so I am guessing it's the small aux battery. I will call the dealer and schedule a visit.

Hi @jmdwifi !

I saw that you're currently working with one of our dealers to get your concerns addressed. If you need any additional assistance while working with them, feel free to send us a private message! Otherwise, please keep us updated on the status of your vehicle. We hope everything gets resolved quickly!

Courtney
Jeep Cares

 

[Geekjeep]

What’s the part number or type of battery for the auxiliary. Pretty sure mine is dead.

 

[jmdwifi]

@Geekjeep

Caveat: Do not pull the Power Distribution Center to get to the Aux. battery. There are
a couple of YouTube Videos circulating that say do this..... Pulling PDC will / could very
well, cause you unneeded headaches.

Rather then OEM/Mopar, I'd probably go with this one:

DieHard Platinum AGM Battery, BCI Group Size 400, 200 CCA
Part # AUX14-1

Here is an Oreilly's Auto Parts offering if you want a cheapie:
O'Reilly Auto Parts
Super Start Platinum Auxiliary Battery Group Size 400
Part #AUX14

How do you get it out without pulling it? Even the genesis dual battery install instructions say to pull it. I’m not getting that system or anything. Just wondering how you would get it out and what headaches could happen.

 

[Geekjeep]

Just looked online. Every video pulls the pdc?

 

[jmdwifi]

JDMWIFI, I have a 2020JT, delivered on 10/25, with 1600 miles. Most of these miles were put on in the 1st month since this is a 4th vehicle I currently have registered. Therefore, with it benign down for all the mods once the newness of the purchase subsided, I've only been driving it locally on a limited days per week. Right now, it can sit for 2-3 days before doing a local grocery run of 2-3miles. Initially, the Stop/Start worked all the time when not heating/cooling the cab. Then about 2 weeks ago I noticed the ESS wasn't working. Then yesterday, like you, when scrolling through the menus I came across the "Stop/Start System Disabled, Battery Charging" message. The vehicle starts/started fine, was charging at 14.7V. I too was contemplating stopping by the dealer to get the batteries checked. However, after driving it 38 miles at 40+MPH, the message when away and "ESS enabled" appeared and it began to work. Therefore, I would recommend driving it for about 45 minutes to see if the message changes.

I drove to Richmond on Friday. It’s about an hour away and it shows the same thing. I’m gonna call the dealer on Monday.

 

[olecarguy]

I drove to Richmond on Friday. It’s about an hour away and it shows the same thing. I’m gonna call the dealer on Monday.

As a follow up to my previous post. After vehicle sat without use for 48hrs I again had the Start/Stop not ready battery charging”. Took 20 miles of non-stop driving before I got a “ready” message and ESS started working. When engine running voltage is 14.4-14.6/7, when ESS activates voltage drops to 12.6/7 initially and drops depending on what accessories are on. I would expect this. Then back to 14.4+ when engine fires up.

I did notice an interesting phenomenon though once working. When stopped, with only light pressure on the brake peddle, but enough to hold the vehicle from rolling, ESS fails to activate. Slightly more pedal pressure and it activates. Seems that one can prevent ESS Activation by modulating pedal pressure once stopped, or at least I can.

 

[Geekjeep]

Do you guys know any other brands and part numbers that work. I can not get either of those in stock, been trying for weeks now

 

[jmdwifi]

Hi @jmdwifi !

I saw that you're currently working with one of our dealers to get your concerns addressed. If you need any additional assistance while working with them, feel free to send us a private message! Otherwise, please keep us updated on the status of your vehicle. We hope everything gets resolved quickly!

Courtney
Jeep Cares

They replaced the battery but the visor buttons have never worked and I have been here since 7:30 this morning. They said they are waiting for Jeep to call them back about the visor. Whether to replace it or run more tests. This shit is annoying. I think Jeep should have a limit, if they don’t call within three hours, replace it.

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