IBS bypass?

[Steel24]

I find myself needing to reset my IBS sensor frequently. I replaced the aux battery about a year ago.
Was wondering if anyone has bypassed the IBS sensor?
What would happen if it was deleted in the system?
I don’t mind the ESS setup. Just hate that the IBS keeps my aux battery from charging.
thanks for the info.

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[Mr._Bill]

The batteries are paralleled together all the time, except during the startup test and during ESS events. If the Aux Battery is not charging, the cabling and High Current Fuse Array need to be checked.

The charging system relies on data from the IBS to make decisions. Removing the IBS will result in poor behavior from the charging system.

What makes you think the Aux Battery is not being charged?

What makes you think that resetting the IBS resolves the charging issue?

Was the Main Battery replaced when the Aux battery was replaced?

How old is the Main Battery?

 

[Steel24]

When I reset the IBS it work great for about two weeks. Then I get the “aux switches unavailable while charging “ every time I start my Jeep.
2020 with the original main battery.

 

[Steel24]

I know I’m on borrowed time with the main battery but it seems to be holding up.
what’s the best battery if I switch the main out?

 

[ShadowsPapa]

I find myself needing to reset my IBS sensor frequently. I replaced the aux battery about a year ago.
Was wondering if anyone has bypassed the IBS sensor?
What would happen if it was deleted in the system?
I don’t mind the ESS setup. Just hate that the IBS keeps my aux battery from charging.
thanks for the info.

IBS has ZIP to do with aux battery charging! Nothing.
Don't delete it....... you'll have other worse problems.

When I reset the IBS it work great for about two weeks. Then I get the “aux switches unavailable while charging “ every time I start my Jeep.
2020 with the original main battery.

You likely have a main battery going south.
Did you FULLY CHARGE the aux battery when replacing it?
If not - that's not a good thing in itself.
A new battery should be fully charged using a good AGM charger before installation. Doesn't matter what a parts store tells you.
Your two weeks bit pretty much leaves out the IBS as being involved, besides the fact, it's not involved with aux battery charging in itself.
When the aux battery was replaced - maybe the high current fuse was blown. Have you checked that?
Have you actually charged - all by itself - the main battery and checked the voltage of the main battery alone with a good meter (not the one in the truck's cluster)?
Have you made sure all cable connections are TIGHT - you can't move or turn any cable connection?

The IBS doesn't go bad except in extremely rare situations. And when it does, it will throw a code. FCA has documents out about that because people were replacing them willy-nilly when they had battery issues or charging system issues, or blown fuses.

And finally, you pretty much answered your own question with stating the main battery is on borrowed time. In other words, you have no idea how unhealthy or healthy it really is, but are instead assuming something not connected to the aux is causing your low voltage errors.
Did you know that "aux switches unavailable" message simply means low voltage across the whole battery pair? It's nothing to do with the aux battery. The switches are fed through the PDC, and BOTH batteries power that at all times. So if you have that message, it's telling you that your battery pair voltage is low, nothing to do with the aux by itself. Both batteries power the aux switches.
I think the terms "aux battery" and "aux switches" confuse some thinking that "hey, the switches are powered by that battery" just because of the name.

My bet is you need to get that main battery charged and/or replaced.
You have a low voltage problem and are masking it by thinking you are fixing something by resetting the IBS (not sure how you are performing the reset........)
If you replace the main, CHARGE it fully first using a good AGM charger, charge that aux battery using a good AGM charger, and reset the IBS and let it relearn. That typically takes a day or less of sitting and a start cycle or two.

And - it's possible you are not driving your JT enough to keep the batteries up....... that's not been said here, drive frequency and distances.

 

[BourbonRunner]

When my IBS acts up I cut out beer and spicy food for a week and it usually goes away.

 

[ShadowsPapa]

When my IBS acts up I cut out beer and spicy food for a week and it usually goes away.

similar since my gall bladder was removed in pieces........... damn, can't stay away from fried and spicy foods, though. Love the Korean red sauces.

 

[Steel24]

IBS has ZIP to do with aux battery charging! Nothing.
Don't delete it....... you'll have other worse problems.

You likely have a main battery going south.
Did you FULLY CHARGE the aux battery when replacing it?
If not - that's not a good thing in itself.
A new battery should be fully charged using a good AGM charger before installation. Doesn't matter what a parts store tells you.
Your two weeks bit pretty much leaves out the IBS as being involved, besides the fact, it's not involved with aux battery charging in itself.
When the aux battery was replaced - maybe the high current fuse was blown. Have you checked that?
Have you actually charged - all by itself - the main battery and checked the voltage of the main battery alone with a good meter (not the one in the truck's cluster)?
Have you made sure all cable connections are TIGHT - you can't move or turn any cable connection?

The IBS doesn't go bad except in extremely rare situations. And when it does, it will throw a code. FCA has documents out about that because people were replacing them willy-nilly when they had battery issues or charging system issues, or blown fuses.

And finally, you pretty much answered your own question with stating the main battery is on borrowed time. In other words, you have no idea how unhealthy or healthy it really is, but are instead assuming something not connected to the aux is causing your low voltage errors.
Did you know that "aux switches unavailable" message simply means low voltage across the whole battery pair? It's nothing to do with the aux battery. The switches are fed through the PDC, and BOTH batteries power that at all times. So if you have that message, it's telling you that your battery pair voltage is low, nothing to do with the aux by itself. Both batteries power the aux switches.
I think the terms "aux battery" and "aux switches" confuse some thinking that "hey, the switches are powered by that battery" just because of the name.

My bet is you need to get that main battery charged and/or replaced.
You have a low voltage problem and are masking it by thinking you are fixing something by resetting the IBS (not sure how you are performing the reset........)
If you replace the main, CHARGE it fully first using a good AGM charger, charge that aux battery using a good AGM charger, and reset the IBS and let it relearn. That typically takes a day or less of sitting and a start cycle or two.

And - it's possible you are not driving your JT enough to keep the batteries up....... that's not been said here, drive frequency and distances.

Very good info, thanks. Yes I charged my aux battery before install. I probably don’t drive long enough on most days. Usually around town doing side jobs and errands. Not a lot of long drives out of town until vacation times.
It’s just strange to me that I can go out in my garage right now and reset the IBS sensor ( disconnect it and wait 20min or over night ) and plug it back in and after a few cycles everything works as it should for about 2 weeks then back to the no ESS and messages.
It seems to me that Jeep didn’t really figure out a good “battery recharging “ system unless you drive more than an hour everywhere.
I’ll definitely replace the main battery real soon.
Any advice on brand and size people are happy with?

 

[Flanders]

It seems to me that Jeep didn’t really figure out a good “battery recharging “ system unless you drive more than an hour everywhere.

It seems that way to me as well. Even after long drives it still needs 1-2Ah.

If you have a way to charge the battery and record the total charge accepted you'll be able to see if there's a trend. If it's taking more charge the longer you go from an IBS reset you'll know your theory is correct. What to do with that knowledge I'm not sure. Curse Jeep is as far as I've gotten.

 

[Mr._Bill]

I know I’m on borrowed time with the main battery but it seems to be holding up.
what’s the best battery if I switch the main out?

You created the current problem by not replacing the Main Battery when the Aux Battery was replaced.

This is what I recommend, and purchased when my 2020 needed a new Main Battery. If you purchase one, make sure Amazon is the seller.

ACDelco Gold 94RAGM (88864542) 36 Month Warranty AGM BCI Group 94R Battery https://a.co/d/e537fJR

 

[Jteakus]

This reminds me I need to go throw the battery tender on mine.

 

[rtjeepman]

You created the current problem by not replacing the Main Battery when the Aux Battery was replaced.

This is what I recommend, and purchased when my 2020 needed a new Main Battery. If you purchase one, make sure Amazon is the seller.

ACDelco Gold 94RAGM (88864542) 36 Month Warranty AGM BCI Group 94R Battery https://a.co/d/e537fJR

My Gladiator is a 2021 and I'm pretty sure that I will be replacing batteries this winter. If I bought from Amazon, what how do I dispose of my old batteries?

 

[sharpsicle]

I would get them locally. Not sure why Amazon is a must for batteries….

 

[Mr._Bill]

My Gladiator is a 2021 and I'm pretty sure that I will be replacing batteries this winter. If I bought from Amazon, what how do I dispose of my old batteries?

You can drop them off at most places that sell auto batteries.

 

[Mr._Bill]

I would get them locally. Not sure why Amazon is a must for batteries….

Amazon is not a 'must' for batteries, but it provides several advantages. The battery is delivered to your front door, and the swap can be done at your convenience. Buying locally requires access to another vehicle, or two trips to the battery store. There is no core charge when purchasing from Amazon. Depending on the local choices, Amazon can also be equal or lower cost for the item. Anyone who regularly purchases from Amazon is likely a Prime Member, which provides free shipping and same or next day delivery on many items.

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