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We bought a 2018 Pacifica Limited which has a 3.6L V6 24V VVT Engine with ESS. It was purchased on 7/2/18 with 17 miles on it. Since then I have had battery drain down problems 4 times. Twice the battery could not be jump started by Chrysler Roadside Assistance (CRA) and had to replaced. The car is with the dealer today and I am hoping they would find the problem. My 3rd minivan and 2 cars from Chrysler/Dodge. The problems were their transmission at 100K miles. Have owned minivans since 1990 (wife loves them).


Chrysler Pacifica was rated the best and I took another chance. Complains of battery life on Chrysler products have been reported on the newer vehicles, but nothing specific. Ther was one that identified Uconnect system draining the battery by turning the radio on (not sure how this happens).


Any ideas of the root cause of battery drain down would be appreciated.
 

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The only thing that I can think of is that your Pacifica may have been on the dealers lot for quite some time,
and the battery became discharged to the point that it won't reach a full charge.
Keep us posted on your resolution.
 

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We bought a 2018 Pacifica Limited which has a 3.6L V6 24V VVT Engine with ESS. It was purchased on 7/2/18 with 17 miles on it. Since then I have had battery drain down problems 4 times. Twice the battery could not be jump started by Chrysler Roadside Assistance (CRA) and had to replaced. The car is with the dealer today and I am hoping they would find the problem. My 3rd minivan and 2 cars from Chrysler/Dodge. The problems were their transmission at 100K miles. Have owned minivans since 1990 (wife loves them).


Chrysler Pacifica was rated the best and I took another chance. Complains of battery life on Chrysler products have been reported on the newer vehicles, but nothing specific. Ther was one that identified Uconnect system draining the battery by turning the radio on (not sure how this happens).


Any ideas of the root cause of battery drain down would be appreciated.
The only thing that I can think of is that your Pacifica may have been on the dealers lot for quite some time,
and the battery became discharged to the point that it won't reach a full charge.
Keep us posted on your resolution.
A friend had this problem. They either replaced the radio or re-flashed it and it fixed the problem.

Hello All,

240ZMan there was a TSB 08-056-18 REV. A released on November 3rd that MAY address your battery drainage concern. If your vehicle is currently at the dealer please have them apply this TSB 08-056-18 REV. A
Please let me know if your need any additional assistance

The symptoms are listed below:


SYMPTOM/CONDITION:Customers may experience one or more of the following:**Symptoms for UAR and UCR radios only:•Anti-theft code request message.•Backup camera screen is blank.
•Lines appear across screen.•Radio control screen is blank or locked.
•Radio resets intermittently.
•Radio will not switch modes between AM, FM, SAT or Media.
•Poor BluetoothTsound quality.
•Phone pairing issues.**Symptoms for UAR, UCR, UGV, UDV and UKV radios:
•PHEV vehicles may intermittently not charge when using the scheduled charging featureinstead of “Charge Now” button.
•When shifting to reverse, the radio displays blue/black lines instead of the rear view cameraand is followed by a reset.
•Radio stays on with key ”OFF” and drains battery.
•Wi-Fi feature cannot be renewed after the trial period has expired.
•Radio reboots multiple times when a Samsung J-7Tphone is connected for charging only.
•Audio System starts up with the anti-theft screen.
•Radio processor freezes while the navigation screen is loading.
•Back-up camera remains live when shifted out of reverse beyond the intended delay feature.

Lamar
Chrysler Social Care Specialist
 

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Discussion Starter #5
Thanks ChryslerCares.


It happened again. I drove it on Wednesday for about 50 miles on the highway and the battery drained down again. The vehicle Info screen displayed battery voltage at 7.4V. This is the 5th time in 5 months. I have about 850 miles on the vehicle. I am taking it to the dealer today an mention the TSB 08-056-18 Rev A fix. The dealer does not have a clue to what is draining the battery. This is the 3rd battery on the vehicle. Its frustrating.
 

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... I drove it on Wednesday for about 50 miles on the highway and the battery drained down again. The vehicle Info screen displayed battery voltage at 7.4V....

To be clear, the vehicle started normally, and the battery discharged while you were driving it? If so, I wouldn't think the radio TSB is going to address your issues. It sounds like the charging system in general isn't working.
 

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Thanks ChryslerCares.


It happened again. I drove it on Wednesday for about 50 miles on the highway and the battery drained down again. The vehicle Info screen displayed battery voltage at 7.4V. This is the 5th time in 5 months. I have about 850 miles on the vehicle. I am taking it to the dealer today an mention the TSB 08-056-18 Rev A fix. The dealer does not have a clue to what is draining the battery. This is the 3rd battery on the vehicle. Its frustrating.
After the battery has been recharged externally (or replaced) does the battery voltage on the Info screen ever read 13 or 14 volts or is it always 12 volts or less? If not, then I think the problem is that it is never getting recharged and is just getting drained down by the multitude of things in this car that require low voltage power. If it is not getting recharged then the culprit could be the APM (Accessory Power Module). See the description posted by @m0ebius604

https://www.dropbox.com/s/72jehtst9f2n30p/APM System Description.pdf?dl=0

Alternatively I suppose one way to tell if it is the UConnect system that is draining the battery is to pull the fuse for it (F76 I think) and keep it that way for a few days. I'm not sure if the climate control buttons will still work with the fuse pulled though.
 

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Discussion Starter #8 (Edited)
2018 pacifica limited battery drain down

The generator charges 13.4V when idling and up to 14 when at high RPM. It only has 831 miles on it. The drain down occurs overnight. Today a jump start using a portable jumper would not even provide enough power to release the parking break to haul the van on a flatbed. Ultimately the tow truck had to be connected by jumper cable and left for about 10 minutes before the van would respond. After a few tries, it started and I drove it 8 miles to the dealer with the tow truck following me. This is the 4th time and dealer downloaded a big list of error codes (4 pages). Hope he finds the problem.

Mine is a gas engine with ESS and does not have the APM as a hybrid. Dealer does not think the Uconnect drains the battery down. This issue seems to be common (dead battery) with the Pacifica. I am searching all blogs to find a solution.



I have called FCA and started a case to treat this as a lemon per California codes.
 

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Discussion Starter #9
The battery did not drain down when driving. It was charging over 13V when driving and reflect 12.4V with engine shutdown. It drained down to about 7.7V in 24 hours. This was indicated on the vehicle information panel before I tried to start the van. Ist try and everything went dead.


The dealer looked at the radio TSB and said it did not apply to my situation. Where can I get a copy of the TSB?
 

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I do not have any of these symptoms describe in TSB 08-056-18 REV. A


Mine are:
. Low Battery voltage, but all systems working normal before trying to start
. After the 1st try to start, battery dead with systems malfunctioning as follows:
. Wipers working intermittently even with the wiper switched off
. Gear selector lights flashing from P to L and back and then all 5 lights coming on (today all lights were off even with the engine running) I had to use the panel indication to select R & D.
. Today when I opened the driver side door the head lights started flashing and this indicated trouble so I approached by check the battery voltage.



Twice the battery was so dead even the tow truck connected by jumper cable could not get the van started. The battery was dead dealer had to replace it.


Where can get copies of the TSB's. May be there is something out there that may help.


Also tow truck driver informed me that last week he had to tow 2 Pacificas, 17 & 18 with dead batteries to another local dealer. I have asked my dealer to contact the other dealer.
 

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Hi. New here today. I have a dead battery on a 2018 w/ESS. I noticed the dash light was on yesterday evening. I turned it off via the brightness wheel (?). Next morning the battery was dead. Cannot get it to recharge. Any help? Thanks.
 

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Hi. New here today. I have a dead battery on a 2018 w/ESS. I noticed the dash light was on yesterday evening. I turned it off via the brightness wheel (?). Next morning the battery was dead. Cannot get it to recharge. Any help? Thanks.
Hello Dan-O,

If you decide you'd like to get this inspected by the dealer and need an additional layer of assistance, let us know. Our team is available via direct message and would be happy to help with that process.

Jasmine
Chrysler Social Care Specialist
 

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Im interested in how you resolved this issue.
I also have the same exact issue and cant figure it out. At first I thought it was the auxiliary battery for the auto start/stop and its not.
 

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Im interested in how you resolved this issue.
I also have the same exact issue and cant figure it out. At first I thought it was the auxiliary battery for the auto start/stop and its not.
While its a long read the thread linked below (there are many other, just search "AUX") will give you some idea of what you are up against, essentially the ESS system and the electrical demands of the Pacifica as reported by a number of owners can overwhelm the batteries.

What year/model is your Pacifica?

 

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Its a 2018 with about 50k miles. I already put a new battery and it happened 4 times already.
Have you replaced both batteries? If your only replacing the main or Aux battery and the other one is bad it will kill the new battery, otherwise there are probably other issues. Maybe the charge controller? Have you taken it to a dealer?
 

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Ive tried to use it with the aux and without, it happens either way. Which leads me to believe its not the aux battery.
Ive taken it to the only “legitimate” chrysler dealer and they really suck at their job.
Im now thinking im getting a parasitic draw and will look into that tomorrow after the the battery charger charges it fully. I was hoping the person who started the thread had a solid solution.
 

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Ive tried to use it with the aux and without, it happens either way. Which leads me to believe its not the aux battery.
Ive taken it to the only “legitimate” chrysler dealer and they really suck at their job.
Im now thinking im getting a parasitic draw and will look into that tomorrow after the the battery charger charges it fully. I was hoping the person who started the thread had a solid solution.
Can you provide more details around how your problem started and what you have done?

It sounds like your saying the main battery will loose its charge over a period of time and you have isolated it from the Aux battery. Have you had the main battery load tested? Is the main battery new or original? How long does it take to loose its charge? Are you able to measure voltages with a meter?
 
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