ESS Not Ready, Battery Charging - Page 5 - 2014+ Jeep Cherokee Forums
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post #41 of 45 (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.

'15 Deep Cherry Red TH w/Brown Interior. 3.2L V-6
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post #42 of 45 (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 45 (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 45 (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 45 (permalink) Old 03-17-2017, 06:20 PM
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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.
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." )

'15 Deep Cherry Red TH w/Brown Interior. 3.2L V-6
Safety-Tec, Cold Weather, Technology, Comfort, Tow, Leather.
Gobi Stealth roof rack with ladder.
My testing platform for electronics/telemetry experimenting.
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