2017+ Chrysler Pacifica Minivan Forums banner

1 - 16 of 16 Posts

·
Registered
Joined
·
118 Posts
Discussion Starter #1
Replacing the auxiliary battery bought me about 13 days of peace. Driving the van yesterday, and after shutting off at a traffic light, it struggled to restart and the ESS warning light and error message appeared.

What I found interesting was when I went under the hood with the thought of disconnecting the battery to reset things, I noticed that the decals on the top of the main battery were lifted up a bit. When I went to smooth the decals back down, I could feel several of the caps on the top of this supposedly non-serviceable battery where proud of the case itself. I pushed them back down, but it looks like I'll be heading to the dealer in the morning for a replacement main battery.
 

·
Registered
Joined
·
395 Posts
Replacing the auxiliary battery bought me about 13 days of peace. Driving the van yesterday, and after shutting off at a traffic light, it struggled to restart and the ESS warning light and error message appeared.

What I found interesting was when I went under the hood with the thought of disconnecting the battery to reset things, I noticed that the decals on the top of the main battery were lifted up a bit. When I went to smooth the decals back down, I could feel several of the caps on the top of this supposedly non-serviceable battery where proud of the case itself. I pushed them back down, but it looks like I'll be heading to the dealer in the morning for a replacement main battery.
Thought you posted this already in another thread. Why copy-paste it here and edit out the bottom part from the other thread?

https://www.pacificaforums.com/threads/auxiliary-battery-out-of-stock.43777/page-2
 

·
Registered
Joined
·
118 Posts
Discussion Starter #3
I realized I was going off on a tangent beyond the original topic, which was the availability of auxiliary batteries. There isn't a delete button on this new forum that I"m aware of, so I created a separate thread. Not particularly a big deal.

BACK ON TOPIC, I went down to my local dealer this morning to pick up a replacement main battery, but according to them Chrysler is changing suppliers from Interstate to one of two other companies that produces the world's lead acid batteries. They sent me to the local Interstate Battery store, where I picked up a replacement to install this evening.
 

·
Registered
Joined
·
118 Posts
Discussion Starter #4
After a second trip to Interstate for the right battery (my van is an early 2016 production 2017, but I needed a battery for a 2018 application because of ESS and the auxiliary battery) I popped the new battery in (losing a 10mm socket somewhere in there in the process) and so far, so good. We'll see if this is a long term solution or if I'll just get a couple weeks of peace.
 

·
Registered
Joined
·
921 Posts
After a second trip to Interstate for the right battery (my van is an early 2016 production 2017, but I needed a battery for a 2018 application because of ESS and the auxiliary battery) I popped the new battery in (losing a 10mm socket somewhere in there in the process) and so far, so good. We'll see if this is a long term solution or if I'll just get a couple weeks of peace.

....no "battery re-learn" as the service receipt stated when the dealership replaced both of my batteries?
 

·
Registered
Joined
·
118 Posts
Discussion Starter #6
....no "battery re-learn" as the service receipt stated when the dealership replaced both of my batteries?
Funny, no. I saw that mentioned in another thread, but according to my wife the ESS is functioning normally. I'm not sure what exactly would need to be relearned by the system.
 

·
Registered
Joined
·
921 Posts
How is your Pacifica shifting now? Did you use a info saver (not the right name) so the radio stations, etc would not be lost when you changed the battery?
 

·
Registered
Joined
·
118 Posts
Discussion Starter #8
Van shifts no different than it did before I swapped the battery out, and the ESS works as it should. I used nothing to save settings, and all presets were retained, including the trip computer and radio.

And note, I had both batteries out at one point last week trying to fit the larger H7 battery.
 

·
Registered
Joined
·
118 Posts
Discussion Starter #10
...so your assessment of the "battery learning" procedure. Maybe it is for the hybrid and not the gas?
That would make more sense. I drove our van a bit more today and it acted like it did when we first bought it last year, in that ESS activated at the bottom of our driveway, which it hadn't been the past few months.
 

·
Registered
Joined
·
118 Posts
Discussion Starter #11
It's been 27 days - and a lot of miles - since I replaced the main battery, and just over a month I replaced the auxiliary (ESS) battery. So far, so good. At least as far as the dash display goes the engine is producing appropriate voltage, and the ESS system is working or not working as it should. Knock on wood, but I think I'm ready to 1) call it problem solved, and 2) declare, in my non-professional mechanic opinion that the problem is that these Pacificas are hard on batteries, especially these ESS-equipped Pacificas, as they require a smaller main battery to accommodate the auxiliary battery. My father-in-law is in town next week with his ESS-equipped Jeep. I'm going to take a gander under the hood to compare/contrast the two systems.
 

·
Registered
Joined
·
700 Posts
It's been 27 days - and a lot of miles - since I replaced the main battery, and just over a month I replaced the auxiliary (ESS) battery. So far, so good. At least as far as the dash display goes the engine is producing appropriate voltage, and the ESS system is working or not working as it should. Knock on wood, but I think I'm ready to 1) call it problem solved, and 2) declare, in my non-professional mechanic opinion that the problem is that these Pacificas are hard on batteries, especially these ESS-equipped Pacificas, as they require a smaller main battery to accommodate the auxiliary battery. My father-in-law is in town next week with his ESS-equipped Jeep. I'm going to take a gander under the hood to compare/contrast the two systems.
It could also be a usage thing, a Jeep's typical trips vs typical minivan trips, just how I can't say for sure. I'd have to guess minivan trips seem to be super short and sporadic interspersed with long trips in between. Can't imagine that would be good for what is essentially a tiny motorcyle battery.
 

·
Registered
Joined
·
118 Posts
Discussion Starter #13
It could also be a usage thing, a Jeep's typical trips vs typical minivan trips, just how I can't say for sure. I'd have to guess minivan trips seem to be super short and sporadic interspersed with long trips in between. Can't imagine that would be good for what is essentially a tiny motorcyle battery.
Anything is possible, but I want to say that this Jeep's and this Pacifica's trips are similar; lots of local and intermediate driving with the occasional long-distance run. I also get the impression that these vans draw a lot of current even with the power supposedly off.
 

·
Registered
Joined
·
286 Posts
I am baffled by mine. My driving profile is pretty much the same winter and summer. Our van has 14000 miles on it. About half is highway and the other half is around town. In the winter the ESS pretty much non-operatioinal around town. The battery always seems to be charging. In the summer ESS is often working with a few miles. In fact, I am not sure I have seen the battery charging message all summer. My conclusion is the temperature of the battery, state of charge and engine temperature all must factor in.

One thing I have just wondered is what battery voltage am I seeing when the van is ESS enabled. Is it the main battery or the ESS battery? It surely cannot be both. In any case, the cost of the system and replacement batteries will outweigh the savings in gas.
 

·
Registered
Joined
·
118 Posts
Discussion Starter #15
I am baffled by mine. My driving profile is pretty much the same winter and summer. Our van has 14000 miles on it. About half is highway and the other half is around town. In the winter the ESS pretty much non-operatioinal around town. The battery always seems to be charging. In the summer ESS is often working with a few miles. In fact, I am not sure I have seen the battery charging message all summer. My conclusion is the temperature of the battery, state of charge and engine temperature all must factor in.

One thing I have just wondered is what battery voltage am I seeing when the van is ESS enabled. Is it the main battery or the ESS battery? It surely cannot be both. In any case, the cost of the system and replacement batteries will outweigh the savings in gas.
ESS will be disabled before the engine gets up to temperature, which could take as while during the winter depending on where you live, or until the cabin is cooled off enough during the summer. And ESS is more for emissions than for fuel economy.
 

·
Registered
Joined
·
286 Posts
I will have to check engine temperature but there must be more like maybe battery temperature. In any case the message states that the ESS unavailability is due to engine temperature.
 
1 - 16 of 16 Posts
Top