ESS/Auxiliary Battery - Page 2 - 2017+ Chrysler Pacifica Minivan Forums
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post #11 of 16 (permalink) Old 05-11-2019, 04:13 PM
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I suspect that you have something other than a battery problem. IIWY, I would do a careful check of all the wiring that is close to the batteries and alternator. Look for a loose wire, and pay particular attention to ground connections. If all is well, consider the alternator. If when the car is running, the voltage indicator shows 13.6 volts or better, it is probably not the alternator. Please tell us which battery that you replaced, ESS or main. This is a simplistic approach and YMMV.

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post #12 of 16 (permalink) Old 05-27-2019, 01:12 PM
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To me there seems to be something wrong when so many aux batteries fail in less than a year. I wonder if it's too small a capacity. Works fine for a while then can't be charged. If it's some flavor of lead acid then the battery must be deep cycling too often. The thing that seems to be killing any lead acid battery is debris from the lead plates (lead oxide, lead sulfate etc.). This seems to me possibly caused by running the battery so low and charging over and over.

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post #13 of 16 (permalink) Old 05-30-2019, 03:59 PM
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The only thing certain about this whole ESS/battery not charged thing is that something is rotten. Starting with the system engineering and then integrating the FCA engineering of a system that works on many if not most other vehicles that use it. FCA seems to have screwed up something in the Pacific installation. We bought our Pacifica with only 15 miles on it in January 2018. By February, the ESS was already failed and had to have a lengthy (days long) investigation by the dealer only to learn that they needed parts that weren't available. When the parts were finally available, it required 3 days of work on their part to install the part (a little thing called the IBS which is part of the battery hookup), check the system again (to include both batteries), teach the car how to start and run, and then basically deep discharge and recharge the batter a number of times. The fixed ESS worked for about 3 days and failed again due to "needs charging." For about six months the ESS was intermittently operational - sometimes it would work, most of the time it wouldn't work. For the past 4 months or so it doesn't work at all to include long driving situations which should have recharged the United States Electrical Grid but not that little stinking battery that runs the ESS. Nothing FCA does or thinks about doing will resolve the issue until such time as they get hauled into court by the government for using this inoperable system to justify a claim for better gas mileage. And don't say @ChryslerCares can help - they can't. The ESS system is just bad and no one knows how to fix an installation that doesn't work. If you have a Pacifica that the ESS works on be thankful but don't be surprised when your system fails just like those of us whose systems failed from day one and could never be fixed.

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post #14 of 16 (permalink) Old 05-30-2019, 07:41 PM
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Quote:
Originally Posted by K&BsNu2108Pacifica View Post
and then basically deep discharge and recharge the batter a number of times.
Yikes! A number of times? Personally, I would label those batteries as hosed at this point. Modern batteries ain't like they used to be; they're finicky about getting discharged like that.

Figure out a way to drop in new (and hopefully non-Chrysler) batteries in and see how it goes.

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post #15 of 16 (permalink) Old 05-31-2019, 09:07 AM
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Originally Posted by K&BsNu2108Pacifica View Post
The only thing certain about this whole ESS/battery not charged thing is that something is rotten. Starting with the system engineering and then integrating the FCA engineering of a system that works on many if not most other vehicles that use it. FCA seems to have screwed up something in the Pacific installation. We bought our Pacifica with only 15 miles on it in January 2018. By February, the ESS was already failed and had to have a lengthy (days long) investigation by the dealer only to learn that they needed parts that weren't available. When the parts were finally available, it required 3 days of work on their part to install the part (a little thing called the IBS which is part of the battery hookup), check the system again (to include both batteries), teach the car how to start and run, and then basically deep discharge and recharge the batter a number of times. The fixed ESS worked for about 3 days and failed again due to "needs charging." For about six months the ESS was intermittently operational - sometimes it would work, most of the time it wouldn't work. For the past 4 months or so it doesn't work at all to include long driving situations which should have recharged the United States Electrical Grid but not that little stinking battery that runs the ESS. Nothing FCA does or thinks about doing will resolve the issue until such time as they get hauled into court by the government for using this inoperable system to justify a claim for better gas mileage. And don't say @ChryslerCares can help - they can't. The ESS system is just bad and no one knows how to fix an installation that doesn't work. If you have a Pacifica that the ESS works on be thankful but don't be surprised when your system fails just like those of us whose systems failed from day one and could never be fixed.
I wonder if some of the ESS problems can be traced back to the V53 recall for cleaning up the ground area for sealer in the wrong place...???

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post #16 of 16 (permalink) Old 05-31-2019, 09:39 PM
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I don't think the V53 recall will afffect the ESS problems. My Pacifica had V53 complied with on 17 May and there has been no change in the ESS operation - or rather the lack of operation.

2018 Pacifica (Gas) Touring L
Manf: 18 Dec 2017, 0800 Hrs, Canada (that was a Monday)
Purchased 26 Jan 2018, 20 Miles, Fruitland Park, FL
Ext Color: Molten Silver
Int Color: Black / Alloy Interior Colors
Perforated Leather Trim Bucket Seats
Engine: 3.6L V6 24V VVT ENgine with ESS
Transmission: 9-Speed FWD Auto Trans

Perpetual Stop/Start Failure - terrible car as unknown future fails exceed the good.
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