Stop-Start Battery went bad - Page 2 - 2017+ Chrysler Pacifica Minivan Forums
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post #11 of 68 (permalink) Old 02-10-2019, 11:07 PM
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Originally Posted by citanic View Post
Because it stays in "charging" for ever. To me it's a sign that the battery is not retaining charge any more.
Assuming that logic is accurate, how do you know which battery is not holding a charge?

My ESS battery failed last spring, and I got an error message and a system disabled warning. I would load test both batteries before changing any parts, or perhaps wait until you see an error message or a trouble code.
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post #12 of 68 (permalink) Old 02-11-2019, 07:44 AM Thread Starter
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Originally Posted by SciTchr View Post
I can't find a better post quickly, but this one shows the items that are 12 mo/12,000 miles and the battery wasn't listed so it should be 36 mo/36,000 miles. This was for the 2017 Pacifica.

"Per page 6 of a 2017 Pacifica's warranty manual:
"F. When It Ends
The Basic Limited Warranty lasts for 36 months from the date it begins or for 36,000 miles on the odometer, whichever occurs first. But the following items are covered only for 12 months or for 12,000 miles on the odometer, whichever occurs first:

brakes (rotors, pads, linings, and drums);
wiper blades;
clutch discs or modular clutch assembly (as equipped);
windshield and rear window; and
wheel alignment and wheel balancing"
Andrea
Chrysler Social Care Specialist

Check your warranty booklet, battery, or ask the dealer.
You can get warranty info for a 2018 gas Pacifica at the following website, but it looks similar to the 2017.
https://www.mopar.com/chrysler/en-us/care/warranty.html
Confirmed, the battery is under the 36 month warranty.
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post #13 of 68 (permalink) Old 02-11-2019, 07:51 AM Thread Starter
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Originally Posted by TomB985 View Post
Assuming that logic is accurate, how do you know which battery is not holding a charge?

My ESS battery failed last spring, and I got an error message and a system disabled warning. I would load test both batteries before changing any parts, or perhaps wait until you see an error message or a trouble code.
Very simple, in the dashboard I'm getting the message when I go to the stop-start page saying that the system is not available because the battery is charging and it has been in this way for long long time. Secondly, I have an adapter from 12 to 5 in my cigarette port or whatever is called that monitor the battery voltage of the big battery, it should be normally 14.2 ~ 14.4 volts and is holding that voltage. In another hand, if that was the battery with issues I would not be driving the car.

I called the dealer and they will check the battery. According to the service lady that was talking to me, the process to check the battery last an hour and a half because it's a computer test that takes that long. I'm sure that if it was not covered by the warranty the whole process would have lasted just the time to replace the battery if they had it in stock. ;-) You know what I mean.

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post #14 of 68 (permalink) Old 02-11-2019, 08:29 AM
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Sounds good, I'm curious to know how this turns out.

Mine has been doing similar, when I brought it to the dealer I was told that is likely because of the cold weather. I haven't seen my van in almost 2 weeks, hopefully they will fix the alternator today. I'm also having them take another look at the ESS system, but I'm wondering if a failing alternator is what caused this. I noticed it stuck on battery charging about two weeks before the alternator abruptly failed at -17F.
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post #15 of 68 (permalink) Old 02-11-2019, 08:39 AM
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I live in MN, with a 2018 gasser.
I have been in FL the last 3 weeks.
I can tell you that in FL, the ESS works works within 3 blocks after an overnight park, works at almost every stop light, most of the time.
Back in MN, it would take a 20 minute drive before ESS would activate. Especially at sub 0 F temps. Is there something wrong with my van? I doubt it. Ambient air temp seems to have a large affect on ESS operation.
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post #16 of 68 (permalink) Old 02-11-2019, 10:10 AM Thread Starter
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Originally Posted by TomB985 View Post
Sounds good, I'm curious to know how this turns out.

Mine has been doing similar, when I brought it to the dealer I was told that is likely because of the cold weather. I haven't seen my van in almost 2 weeks, hopefully they will fix the alternator today. I'm also having them take another look at the ESS system, but I'm wondering if a failing alternator is what caused this. I noticed it stuck on battery charging about two weeks before the alternator abruptly failed at -17F.
I live in South Florida so ESS should work all time. There our lowest temp here is 40 F and it happens 2 or 3 teams a year to go back to +75F.

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post #17 of 68 (permalink) Old 02-11-2019, 10:11 AM Thread Starter
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Originally Posted by Lipster View Post
I live in MN, with a 2018 gasser.
I have been in FL the last 3 weeks.
I can tell you that in FL, the ESS works works within 3 blocks after an overnight park, works at almost every stop light, most of the time.
Back in MN, it would take a 20 minute drive before ESS would activate. Especially at sub 0 F temps. Is there something wrong with my van? I doubt it. Ambient air temp seems to have a large affect on ESS operation.
Agree. The only bad thing is that during the week I only drive 8 miles to work and back. But during almost a whole year it was working fine.

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post #18 of 68 (permalink) Old 02-11-2019, 09:15 PM Thread Starter
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They tested the small battery and the tool they used said the battery is good. But, the car says that it still charging so stop-start is unavailable. l think that I'm going to need @ChryslerCares here.
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Last edited by citanic; 02-11-2019 at 09:20 PM.
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post #19 of 68 (permalink) Old 02-11-2019, 11:43 PM
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You might get some useful information by measuring the voltage on the batteries with a voltmeter after the van has been sitting for a few hours.



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post #20 of 68 (permalink) Old 02-12-2019, 08:05 AM Thread Starter
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You might get some useful information by measuring the voltage on the batteries with a voltmeter after the van has been sitting for a few hours.
After a night of being at rest, I measure the voltage in the small battery and I got 12.46v. But this is without a load. I have seem batteries measuring without load 12v or more and as soon as you connect any load they die.

The voltage of the big battery with the car running is 14.1v.

One thing that the technician was telling me was that if the big battery was going bad the stop-start feature may not trigger. Go figure. I do not think that the guy knew too well the system. Other things that he told me was that they have replaced a lot of the small batteries up to the point that they went on back order at one point. He also mentioned that they tried an aftermarket battery but he did not like it because it was not fitting very well in the little compartment or place that holds the small battery.

So here I'm @ChryslerCares , to replace the batteries the instrument needs to return the code they will submit later to Chrysler to get paid for the battery replacement under warranty. And that's not happening. I have a second appointment for this saturday where they will test again both batteries. If nothing comes out wrong then they said that next step is for them to open a ticket with Mopar to get what to do next.

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Last edited by citanic; 02-12-2019 at 08:08 AM.
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