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You all have got me thinking now - is my ESS failing? When I start the car, it indicates the engine is too cold for ESS to work. Fine, I get that. However, when the engine is fully warmed the message changes to indicate the battery is charging. I will drive for 10-15 miles with that message. On the trip home, the battery still is charging after the engine is warmed up. C'mon does that battery need charging still? eventually, ESS goes active but the long charging interval makes me wonder.

I am going in this week to finally get some recall work done. Is this an brewing issue that can be fixed? Is cold weather a factor? What have others found?

I am ambivalent about the ESS and am concerned that future battery replacements or ESS maintenance will cost more than any gas I save. Still, if it is there, I want it to work. By the way, if ESS is active, I make it a practice to hit the disable button upon entering the driveway to stop that stupid stop and restart scenario in the garage.
 

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I know mine never showed a thing about battery charging till it got cold out. Lead acid batteries cannot produce as much current in cold weather, so I think the system is more conservative with battery charge then it needs to be in cold weather.

I believe the system avoids a condition where the battery lacks enough power to restart at all costs, which means it deactivates itself a lot of the time when it would otherwise work normally.
 

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I know mine never showed a thing about battery charging till it got cold out. Lead acid batteries cannot produce as much current in cold weather, so I think the system is more conservative with battery charge then it needs to be in cold weather.

I believe the system avoids a condition where the battery lacks enough power to restart at all costs, which means it deactivates itself a lot of the time when it would otherwise work normally.
I've noticed this more now that it has gotten cold but 30 degrees like yesterday is not cold for here.

So then my question is which battery is this referring to-the main battery (presumably the one that starts the car) or the other (which presumably only runs functions during ESS shutdown). The fact that it is still charging after 10-15 miles makes me wonder how low it was and how much more charging it needs to be fully recharged if I park the car and it still indicated charging.

This tells me ESS is mostly non-functional in cold weather so what good is it?

Going to dealer Thursday to get the little brake door and software updated. It is a small town dealer where I can talk directly with the techs. I will ask around.
 

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Out of curiosity, what happens if you just turn the car off instead of shifting it to park? I have the hybrid and I feel like when I did this it shut the car off and shifted to park, but I'd have to go outside and verify that.


A regular gas Pacifica is not that easy to shut off while in drive or reverse. The regular push on the start button won’t work. It doesn’t do anything. Some members say you have to double push or keep it pressed for x amount of time, or something like that. I gave up after a few tries. However it will allow you to shut off in Neutral and the gear shifter automatically rotates to park.
The easiest way to avoid the engine restarting is to simply push the ESS button while entering garage.
I like the ESS BTW.


Sent from my iPhone using Tapatalk
 

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No go. It still restarts when I shift. After pondering this all day yesterday, I am thinking that maybe the transmission pump needs to be making pressure to move the valve body and gears back into PARK, and that is why it has to restart. Makes sense. I'm just moving a knob (the only thing I'm not a fan of on the car), and not anything mechanical.

Any comments, or ideas from Chrysler on this?

Maybe I'll just turn off the ESS when I enter the garage.
 

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No go. It still restarts when I shift. After pondering this all day yesterday, I am thinking that maybe the transmission pump needs to be making pressure to move the valve body and gears back into PARK, and that is why it has to restart. Makes sense. I'm just moving a knob (the only thing I'm not a fan of on the car), and not anything mechanical.
That's a good thought, but I don't think it's true. The parking system is spring-loaded to default to park, and it takes hydraulic pressure to disengage the parking pawl. From the 2017 workshop manual:

2017 Pacifica Workshop Manual said:
Valve body function is directed by the TCM. There is a solenoid for each of the six clutches, plus one for TCC and one for system pressure. There are two solenoids used by the park-by-wire system: a hydraulic apply solenoid (called the park control solenoid) and a mechanical solenoid to operate the parking pawl (called the park-lock solenoid). there are no mechanical connections between the shifter and the transmission. The park control solenoid routes pressure to the park-lock valve. The valve is attached to the linkage that moves the parking pawl out of the park position. A mechanical park-lock solenoid latches onto the end of the parking-lock valve to hold the valve out of the park position. The valve is spring-loaded to default into the park position when power is removed from the park-lock solenoid. However, the hydraulic park valve will not move to the park position until the park control solenoid is de-energized. When the transmission is placed in park, the TCM commands the park control solenoid to release the hydraulic pressure holding the parking pawl away from the park gear, and the park-lock solenoid releases the mechanical hold on the park-lock valve. If a fault occurs while the transmission is out of park, the TCM may de-energize all solenoids. At this point, the F dog hydraulic release circuit will hold the parking lock valve out of park until the engine is stopped. Moving the electronic park-by-wire shifter to the park position will not engage the parking pawl during certain faults.
 

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That's a good thought, but I don't think it's true. The parking system is spring-loaded to default to park, and it takes hydraulic pressure to disengage the parking pawl. From the 2017 workshop manual:
If this is true, then I'd really like to see a reflash where my engine doesn't restart when I touch the shift knob.

Anyone at FCA reading this? Comments?
 

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If this is true, then I'd really like to see a reflash where my engine doesn't restart when I touch the shift knob.

Anyone at FCA reading this? Comments?
Hi SawDoc441,

We're sorry to hear that you have a concern with your Pacifica. We recommend that you visit your servicing dealer for a diagnosis. If you are in need of additional assistance while your vehicle is in service, please send us a private message.

Darlene
Chrysler Social Care Specialist
 

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If this is true, then I'd really like to see a reflash where my engine doesn't restart when I touch the shift knob.



Anyone at FCA reading this? Comments?


The “restart after shifting to park” is how mine works, when ESS works. It’s very annoying. The easiest flash would be “ESS disable when park distance sensors active”.
 

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Hi SawDoc441,

We're sorry to hear that you have a concern with your Pacifica. We recommend that you visit your servicing dealer for a diagnosis. If you are in need of additional assistance while your vehicle is in service, please send us a private message.

Darlene
Chrysler Social Care Specialist
IT ISN'T BROKEN! This is an undesireable trait. The dealers around here have no clue anyway. There is no way possible in a thousand years that any dealers near 30179 could correct this let alone even describe it on a work order. I am asking YOU (FCA representative) to take this up hill to to the folks who design this stuff, to make the ESS more friendly. Most people just turn it off. I'd prefer to work with it.
 

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IT ISN'T BROKEN! This is an undesireable trait. The dealers around here have no clue anyway. There is no way possible in a thousand years that any dealers near 30179 could correct this let alone even describe it on a work order. I am asking YOU (FCA representative) to take this up hill to to the folks who design this stuff, to make the ESS more friendly. Most people just turn it off. I'd prefer to work with it.
Hi SawDoc441,

Thank you for the clarification. If you would like to provide feedback, please send us a private message with your VIN, mileage, and dealer, as well as the experience that you would like notated.

Darlene
Chrysler Social Care Specialist
 

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I am 3 weeks in with my 2019 which does have ESS. I usually remember to turn it off as soon as I start up but when I don't I remember the first time it shuts off and then turn it off.
I will say that it is much smoother at shut off/turn on than my Alfa Romeo so I can see getting used to it if I left it on.
John
 

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Well, my 2018 Limited sure does have that junk. Have it shut off permanently.
 

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I've driven many vehicles with ESS, so I usually don't give it a second thought. The only I've noticed with the ESS in our Pacifica is that if you are stopped on a hill (nose pointing up) and you take your foot off the brake pedal, the van will roll backwards until the engine starts and the engine gets past the torque converter stall speed. IIRC the other vehicles I've driven used the electric parking brake with the ESS as a hill hold. Unless something is malfunctioning in our van, it is peculiar that they wouldn't integrate the parking brake in this way.
 

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After 6000 miles I see no redeeming value in using ESS.I do not like it and would hope for an update to disable it,although I won’t be holding my breath to see it happen.
 

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After 6000 miles I see no redeeming value in using ESS.I do not like it and would hope for an update to disable it,although I won’t be holding my breath to see it happen.

It all depends on your driving habits. It doesn't bother me so I haven't tested the theory, but ESS is supposed to help with your fuel economy. I do know that on our last long trip (CT to NC and back) we averaged more than 30 MPG. I can't say how much of that ESS contributed to the mileage, but it certainly didn't hurt and I was impressed by that number.
 

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I've driven many vehicles with ESS, so I usually don't give it a second thought. The only I've noticed with the ESS in our Pacifica is that if you are stopped on a hill (nose pointing up) and you take your foot off the brake pedal, the van will roll backwards until the engine starts and the engine gets past the torque converter stall speed. IIRC the other vehicles I've driven used the electric parking brake with the ESS as a hill hold. Unless something is malfunctioning in our van, it is peculiar that they wouldn't integrate the parking brake in this way.
If I recall correctly, mine says something to the effect that the car is on an incline and the ESS is disabled. It does the same if the steering wheel is turned.
 

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My wife got her 2018 Pacifica about a year ago. She had rented one in Arizona while on vacation, and her inclination was to turn it off every time she started the car. When we got her the new one, she turned it off at first, and then forgot several times. As it turned out, it really didn't bother her, and she noticed better fuel economy in stop and go driving.

I purchased a 2019 Jeep Cherokee Overland 4WD with the 2.0 Turbo 4 cyl. It came with ESS. I got used to it pretty quickly, and I also noticed the better gas mileage. I now use it all the time except when pulling forward into my garage. It's on a slight incline, and I prefer to make sure that the engine is not shutting off as I approach the front wall of the garage.
 
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