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post #41 of 49 (permalink) Old 03-16-2017, 06:29 PM
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Originally Posted by Mark_ View Post
Ok I missed that... oopsy.

So we still don't know which of those flashes did something. In one thread a member posted pdfs for 5 of those 6 flashes and only one seems like a possible fit, and it's this one :
http://www.wk2jeeps.com/Misc/Cheroke...08_024_16b.pdf
(unprovoked power to the instrument cluster).
Refernce : Just got 7 software flashes today -- what do they address?
There was BCM or PCM flash in the group and the comment on the ESS service items was that one of them fixed it. I don't think I have the paperwork to verify which one though.

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post #42 of 49 (permalink) Old 03-17-2017, 09:22 AM
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There was BCM or PCM flash in the group and the comment on the ESS service items was that one of them fixed it. I don't think I have the paperwork to verify which one though.
Thanks.
I've looked at the descriptions for both of those, and nothing even hints at whatever could be causing this problem. One of those mystery fixes I guess...

Well let's keep this *ticket* open and hope for a concrete answer (from FCA) at some point. Could help a bunch of KL owners.

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post #43 of 49 (permalink) Old 03-17-2017, 11:09 AM
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didn't work this morning. 46*F. working fine now 65*F. I think my battery is ready to go bad. Temp is definitely affecting it. fortunately we will not see any temps below 60*F for the next 10 months at least... we'll see.

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post #44 of 49 (permalink) Old 03-17-2017, 11:57 AM
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didn't work this morning. 46*F. working fine now 65*F. I think my battery is ready to go bad. Temp is definitely affecting it. fortunately we will not see any temps below 60*F for the next 10 months at least... we'll see.
Hmmm. Somehow I don't think it's temperature here. Like I said before, batteries do well above freezing, so 40s and 60s are quite similar.
I think *morning* might be more of an indication, as in after many hours of inactivity. I'm thinking you may have a parasitic draw in there somewhere, causing the battery to be slightly drained overnight. Once you have driven for a while, if my theory holds any water, the battery would then regain full charge status and ESS good to go.

Or your battery is defective and slowly dying. It's possible.

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Last edited by Mark_; 03-17-2017 at 12:01 PM. Reason: oops typo
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post #45 of 49 (permalink) Old 03-17-2017, 06:20 PM
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Originally Posted by HawkeyeKL View Post
didn't work this morning. 46*F. working fine now 65*F. I think my battery is ready to go bad. Temp is definitely affecting it. fortunately we will not see any temps below 60*F for the next 10 months at least... we'll see.
One of the inhibitors for ESS is climate-controls active.

One of the other inhibitors in if the engine is turned off. (I posted a pic somwhere of the EVIC message to the effect of "ESS disabled. Engine is off." )

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post #46 of 49 (permalink) Old 03-29-2017, 07:46 AM
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So I have not had any problems since the temp has stayed over 55*. I think temp has something to do with it, however I did notice that I have been getting a little static zap off the door when I get out. not every time, but once every 3-5 exits or so. I wonder if I have a short somewhere? anyone else get zapped when they get out and close the door?

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post #47 of 49 (permalink) Old 03-30-2017, 06:11 PM
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ESS - system disabled, maintenance required message

I posted the other day on the 83361-engine-stop-start-ess thread as it took our Jeep dealer a while and a few trips to him for them to figure it out and it is a faulty "Battery Intelligence Sensor" .

I live in Ontario Canada and the entire winter the ESS has not come on, just thought that with the cold temps outside that it automatically disables it self but no real concern to me but then a few weeks back had a warning appear on the screen saying something to the effect "ESS - system disabled, maintenance required". The message only appears for about 3-5 seconds so I had no time to snap a picture or barely read what it said and that was each of the like 30 times it popped up since.
There is a little orange icon that then appears on the screen showing there is an issue so we took it to the dealer. Well when the vehicle is turned off the screen warning resets and guess so does the warning code as they could not find a fault. Well we left the dealer and the next day it happened again so we booked an appointment, they had it for the day, found nothing so we left and once again it appeared. We booked another appointment and left it with them overnight, they had it the next day, checked could find no issues but replaced a few modules. My wife picked it up, drove it away and it came up again, she turned around, went back and went into the shop to show them, but of course she turned it off so there was nothing for them to see. Again she left, again it came on, again she went back but this time left it on, they seen it, plugged into the ODB and read the code and turns out that it is a faulty "Battery Intelligence Sensor" but they had to order one which it is now on order and set to be replaced next week.

So in short, if this ever happens to anyone, do not shut it off, go STRAIGHT to the dealer and tell them to plug it in while its running as for some VERY strange reason this code clears once the engine turns off and no record of it shows int he ODB.
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post #48 of 49 (permalink) Old 03-30-2017, 08:20 PM
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I posted the other day on the 83361-engine-stop-start-ess thread as it took our Jeep dealer a while and a few trips to him for them to figure it out and it is a faulty "Battery Intelligence Sensor" .

I live in Ontario Canada and the entire winter the ESS has not come on, just thought that with the cold temps outside that it automatically disables it self but no real concern to me but then a few weeks back had a warning appear on the screen saying something to the effect "ESS - system disabled, maintenance required". The message only appears for about 3-5 seconds so I had no time to snap a picture or barely read what it said and that was each of the like 30 times it popped up since.
There is a little orange icon that then appears on the screen showing there is an issue so we took it to the dealer. Well when the vehicle is turned off the screen warning resets and guess so does the warning code as they could not find a fault. Well we left the dealer and the next day it happened again so we booked an appointment, they had it for the day, found nothing so we left and once again it appeared. We booked another appointment and left it with them overnight, they had it the next day, checked could find no issues but replaced a few modules. My wife picked it up, drove it away and it came up again, she turned around, went back and went into the shop to show them, but of course she turned it off so there was nothing for them to see. Again she left, again it came on, again she went back but this time left it on, they seen it, plugged into the ODB and read the code and turns out that it is a faulty "Battery Intelligence Sensor" but they had to order one which it is now on order and set to be replaced next week.

So in short, if this ever happens to anyone, do not shut it off, go STRAIGHT to the dealer and tell them to plug it in while its running as for some VERY strange reason this code clears once the engine turns off and no record of it shows int he ODB.
Jeez... ya'd think the code would be stored. Time for OBDIII...

Thanks for posting this, and good luck with the fix. Let us know how it goes !

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post #49 of 49 (permalink) Old 03-31-2017, 06:23 PM
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That was it, the "Battery Intelligence Sensor" was the issue and the ESS is working perfect again. The mechanic said that it was faulty and for some reason not storing a code once the engine is turned off. They said they would report it, so everyone here is aware, it is a fairly quick fix but one that you would want to happen under warrantee for sure.
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