The message is advisory, not a warning of something wrong. The batteries charge state is accessed and if there is not enough charge the ESS is turned off to allow the battery's to charge up. Cause while you use the ESS it drains the battery's while the engine is off.
The WK2 has smart charging, its using computers to access the battery's state of charge and adjusting charging voltage accordingly, to charge the battery as quickly as possible but not to overcharge it, which greatly decreases the battery's life, especially AGM battery's. I.E. the charging voltage goes up and down according the battery state. 14.3 Volts sounds normal, especially in cool or cold weather.
In the past, there was a battery temp sensor, and charging system voltage was varied according to the battery temp to prevent overcharging the battery. You would see the system voltage change with temperature, going up the colder it was. Now, you will see the voltage change several times in a minute or not at all for hours. All depends on the charge state of the battery.
If you drove 45 minutes non-stop on a highway, that should have fully charged the battery. Did you get the message after that trip? If so, then I would suspect you might have a battery problem, one of the two batteries, you have a small auxiliary to be used for use when the engine is off while at a stop. If you got it before the trip and it hasn't come back, it might be perfectly normal.
Yes, since FIAT took over, there has been a shortage of parts, it was far worse at first then it is now. FCA burned many bridges with customers when they left customers vehicles sitting in Dealer lots waiting up to 6 months for parts to repair them.
Joined
Feb 12, 2011 · 148 Posts
Discussion Starter · #1 ·
Jan 30, 2019 Hey Gang, I know this is a hotly debated topic. And, for the record, I shut off the Auto Start/Stop function every time I start the Jeep. However, there are a couple of traffic lights on my commute that take 2 - 2.5 minutes to cycle from red to green. In these instances I figure I will save a little gas and I will reactivate the Auto S/S
function Lately, my success in shutting off the engine by re-engaging the Auto S/S function have been spotty at best. Sometimes the engine shuts off; other times it does not. Does anyone know what parameters must be met so the Auto S/S will function? Just trying to figure out why the
performance of Auto S/S is not consistent. I would hate to take it to the dealer and lose the Jeep for a day only to be told the Jeep is "functioning as designed". I have the 3.6 engine. Thanks! Joined
May 12, 2016 · 101 Posts
Hey Gang, I know this is a hotly debated topic. And, for the record, I shut off the Auto Start/Stop function every time I start the Jeep. However, there are a couple of traffic lights on my commute that take 2 - 2.5 minutes to cycle from red to green. In these instances I figure I will save a little gas and I will
reactivate the Auto S/S function Lately, my success in shutting off the engine by re-engaging the Auto S/S function have been spotty at best. Sometimes the engine shuts off; other times it does not. Does anyone know what parameters must be met so the Auto S/S will function? - Does the engine have to run for a specified amount of time? - Does the coolant, tranny, etc. have to reach a certain temperature? - Must the vehicle be on a perfectly flat surface?
Just trying to figure out why the performance of Auto S/S is not consistent. I would hate to take it to the dealer and lose the Jeep for a day only to be told the Jeep is "functioning as designed". I have the 3.6 engine. Thanks! My experience, the engine does need to be warmed up and at operating temperature. Joined
Aug 11, 2016 · 612 Posts
From the owners manual. Possible Reasons The Engine Does Not Autostop Joined
Apr 11, 2014 · 2,274 Posts
Add to that the battery failing ... mine seems to have stopped working altogether, even thought I had them check the batter at last service. Joined Feb 12, 2011 · 148 Posts
Discussion Starter · #5 ·
Jan 30, 2019 Thanks Grimmjpr! I appreciate all that info.
Joined Aug 11, 2016 · 612 Posts
Thanks Grimmjpr! I appreciate all that info. No problem, I know some people had some weirdness with the stop/start and most hate it. I didn't mind
it once i got used to it. Mine seemed to work fine. In the winter it would take a bit before it would kick in, and in the summer i run the AC maxxed out a lot so it didn't shut down much in the summer..... Joined Apr 11, 2014 · 2,274 Posts
You know you can scroll down in the instrument cluster menu to the Auto Stop Start item, and it will tell you status like "Ready" or "Not ready - battery charging" ...? Joined Nov 13, 2018 · 24 Posts
Thanks Grimmjpr! I appreciate all that info. It's actually an FCA thing. The Dodge Durango has the same list in its manual.
- Does the engine have to run for a specified amount of time?
- Does the coolant, tranny, etc. have to reach a certain temperature?
- Must the vehicle be on a perfectly flat surface?
So does the climate control. Ex. On a hot day when the AC is working on Max to cool the cabin, it doesn’t shut off the engine. On a cooler day
when the AC is running at a lower fan speed and a higher temp (set on auto), the engine will turn on if you turn the temp colder while the engine is off.
Prior to engine shut down, the system will check many
safety and comfort conditions to see if they are fulfilled.
Detailed information about the operation of the Stop/Start
system may be viewed in the instrument cluster display
Stop/Start Screen. In
the following situations, the engine
will not stop:
• Driver’s seat belt is not buckled.
• Driver’s door is not closed.
• Battery temperature is too warm or cold.
• Battery charge is low.
• The vehicle is on a steep grade.
• Cabin heating or cooling is in process and an acceptable
cabin temperature has not been achieved.
• HVAC is set to full defrost mode at a high blower speed.
• HVAC set to MAX A/C.
284 STARTING AND OPERATING
• Engine has not
reached normal operating temperature.
• The transmission is not in a forward gear.
• Hood is open.
• Vehicle is in 4LO transfer case mode.
• Brake pedal is not pressed with sufficient pressure.
Other Factors Which Can Inhibit Autostop Include:
• Accelerator pedal input.
• Engine temp too high.
• 5 mph (8 km/h) threshold not achieved from previous
AUTOSTOP.
• Steering angle beyond threshold.
• ACC is on and speed is set.
It may be possible for the
vehicle to be driven several times
without the STOP/START system going into a STOP/
START READY state under more extreme conditions of the
items listed above.
I just ran down the list and answered 'no' to almost all. (Not sure how to tell if the "battery is too hot or cold".)
Guess it's just a "Jeep Thing".
I just ran down the list and answered 'no' to almost all. (Not sure how to tell if the "battery is too hot or cold".)
Guess it's just a "Jeep Thing".
I just ran down the list and answered 'no' to almost all. (Not sure how to tell if the "battery is too hot or cold".)
Guess it's just a "Jeep Thing".
Joined Jul 9, 2012
·
11,770 Posts
It's actually an FCA thing. The Dodge Durango has the same list in its manual. They are the same vehicle "underneath"...Durango, at least the current generation...is stretched 5" to accommodate the third row seating and comes off the same factory line at Jefferson North intermingled with JGCs. The manual
is nearly identical for that reason.
Joined Nov 13, 2018
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24 Posts
I wonder if the Auto Stop/Start conditions extend beyond the JGC and Durango though.
Joined Aug 11, 2016
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612 Posts
I wonder if the Auto Stop/Start conditions extend beyond the JGC and Durango though. The start stop parameters on our Focus RS are way less. Seems like engine temp and maybe HVAC temps. Not totally sure of all of them since we pretty much always shut it off at start up. Start stop with a manual is
weird.
Joined Feb 12, 2011
·
148 Posts
Discussion Starter · #12 · Jan 31, 2019
You know you can scroll down in the instrument cluster menu to the Auto Stop Start item, and it will tell you status like "Ready" or "Not ready - battery charging" ...? Thanks BubbaATL. I did not know the Auto S/S status was available in the instrument cluster. I will have to give that a look the next
time I reactivate Auto S/S and it does not shut off the engine. As I mentioned, I shut Auto S/S off when I start the Jeep and selectively turn the function back on based on the cycle time of the traffic light. If it is a minute or so, I will let the Jeep idle. If the cycle time is longer I will reactivate the function and let the engine shut down. When it does not shut down I experience a "WTH?" moment.
Joined Apr 11, 2014
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2,274 Posts
... That's pretty much how I use it also, although with either the cold weather or the secondary battery having deteriorated, it's pretty much stopped working regardless. You also know about the SmartStopStart module that will remember where you left the setting so you don't have to turn it off every time you start the Jeep?
As I mentioned, I shut Auto S/S off when I start the Jeep and selectively turn the function back on based on the cycle time of the traffic light. If it is a minute or so, I will let the Jeep idle. If the cycle time is longer I will reactivate the function and let the engine shut down. When it does not shut down I
experience a "WTH?" moment.
Joined Feb 12, 2011
·
148 Posts
Discussion Starter · #14 · Feb 2, 2019
Yep! I've seen it in here in other posts. Not sure it is worth the $100 (?). The last couple of days I've been checking the dash cluster (as you suggested) and it appears in stop & go traffic on the way home the battery is "charging" and the Auto S/S won't activate. It has been cold so I am going to attribute the non-functioning Auto
S/S to the cold. It's kinda funny. When I want it to shut off, it won't. When I don't want it to shut off it does. Thanks again for the info about the dash cluster. I never realized it showed the Auto S/S status other than "on" or "off".
Joined Apr 28, 2017
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144 Posts
Jeep JL and Chrysler Pacifica guys have had a bunch of issues as well. Failing batteries, Stop/Start not ready battery charging message staying on.
Joined Apr 11, 2014
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2,274 Posts
... The dash cluster holds many secrets. It was a couple of months before I figure out that on many screens the left and right arrows reveal obscure and arcane knowledge.
Thanks again for the info about the dash cluster. I never realized it showed the Auto S/S status other than "on" or "off".
Joined Feb 12, 2011
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148 Posts
Discussion Starter · #17 · Feb 4, 2019
Jeep JL and Chrysler Pacifica guys have had a bunch of issues as well. Failing batteries, Stop/Start not ready battery charging message staying on. Good to know. Just drove 15 miles all at 60 mph or better. Temperature: 32 degrees. Got off highway and Stop/Start was "not ready battery charging".
Only the heat, headlights and radio were on. Me thinks the 8 month old battery may be on its way out or the charging system is not playing well with others....
Joined Feb 12, 2011
·
148 Posts
Discussion Starter · #18 · Feb 4, 2019
The dash cluster holds many secrets. It was a couple of months before I figure out that on many screens the left and right arrows reveal obscure and arcane knowledge. The older I get, the more skittish I am about wandering down these deep, dark paths of the dash cluster. I fear I might not find my way
back out!
Joined Apr 28, 2017
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144 Posts
Good to know. Just drove 15 miles all at 60 mph or better. Temperature: 32 degrees. Got off highway and Stop/Start was "not ready battery charging". Only the heat, headlights and radio were on. Me thinks the 8 month old battery may be on its way out or the charging system is not playing well with others.... I just had my battery replaced under warranty. It didn’t fix the problem. It’s actually worse. “Stop/Start not available battery charging”. It said this after a 45 min commute to work and then home too. So it’s not the battery like Jeep thought.
Joined Feb 12, 2011
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148 Posts
Discussion Starter · #20 · Feb 5, 2019
I just had my battery replaced under warranty. It didn’t fix the problem. It’s actually worse. “Stop/Start not available battery charging”. It said this after a 45 min commute to work and then home too. So it’s not the battery like Jeep thought. I'm really sorry to hear that. My Auto Start/Stop
was (mysteriously) working this morning after my highway commute to work. Outside temperature was above freezing for a change. I'm still concerned with all the constant "battery charging". If the secondary battery is that drained overnight that the Auto Start/Stop cannot function then there must be an issue somewhere. I will keep an eye on it, but I have a feeling a dealer visit is in my not too distant future. Please let me know how you make out and
what the final resolution is. Good luck Drumnatural! Thanks!