ESS Not Ready, Battery Charging - 2014+ Jeep Cherokee Forums
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post #1 of 45 (permalink) Old 10-22-2015, 08:47 AM Thread Starter
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ESS Not Ready, Battery Charging

Greetings!

I've only had my TH for a little over a week, and absolutely love it so far, but I'm having a potential issues with the ESS system. The dealer explained the system to me before leaving the lot, and I actually think it could be pretty cool on occasion, since i have two lights on the way to work that take forever to turn, and it would save me manually turning off the engine.

Since I've had it (only 350 miles) I have not yet had the ESS activate, and on the dash it says it is not ready, Battery Charging. The battery status shows it at 14.4v and steady. It dips a bit lower right after I start it up of course, but only takes a few moments to charge it back up.

Has anyone else encountered anything like this? Is there a mileage limit it needs to hit before it starts working? Temperatures have been in the 70s the past few days, so I dont think that is holding it up.

I'm not in a hurry to take it back to the dealer for a small issue like this, but would someday like to at least have the option of trying it out. Any input would be appreciated.

Cheers

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post #2 of 45 (permalink) Old 10-22-2015, 09:04 AM
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Not completely sure if you have a problem just yet. All I could tell you is that the day I picked my truck up the first light I hit after startup the ESS worked.

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post #3 of 45 (permalink) Old 10-22-2015, 09:08 AM
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How far of a drive between start up and the first light? It is possible the battery isn't fully recovered from initial startup and conditions aren't met for ESS to engage.

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post #4 of 45 (permalink) Old 10-22-2015, 09:13 AM Thread Starter
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The lights are both nearby my office so I go more than 15 miles before hitting the lights. I could understand if it skipped it when leaving there, as that is only a minute or two after starting, but it always says battery charging, whether I take it for a 1 mile trip, or 20.
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post #5 of 45 (permalink) Old 10-22-2015, 09:15 AM
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Definitely strange then...I remember reading somewhere that someone's ESS battery connector terminal wasn't connecting properly and gave that error code all the time. The connector was replaced and all was good (pretty sure I remember this)

2015 Bright White TH, 3.2L, Cold Weather group, Tow group, 8.4AN, build date 2/15

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post #6 of 45 (permalink) Old 10-22-2015, 09:51 AM Thread Starter
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I did find a thread during my searches talking about disconnecting a plug that would make the ESS system think the battery wasnt ready. I will try poking at it today before I head in. If reseating it doesn't change anything I guess I will have to swing it by the dealership sometime.

2003 Laredo
Onyx Green | 4.0l i6 | Tow | Selec-Trac |

Mods: 2.5" Hazard Sky Lift | 31" KO2 Tires | Rugged Ridge Diff Covers | Lubelocker Seals | Hitchgate Solo Rear Mount | Led Lighting | Spyder Headlamps | CB/ham | Yakima Rack |

Baltimore, MD

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post #7 of 45 (permalink) Old 10-22-2015, 09:57 AM
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Quote:
Originally Posted by HazzardSky View Post
Greetings!

I've only had my TH for a little over a week, and absolutely love it so far, but I'm having a potential issues with the ESS system. The dealer explained the system to me before leaving the lot, and I actually think it could be pretty cool on occasion, since i have two lights on the way to work that take forever to turn, and it would save me manually turning off the engine.

Since I've had it (only 350 miles) I have not yet had the ESS activate, and on the dash it says it is not ready, Battery Charging. The battery status shows it at 14.4v and steady. It dips a bit lower right after I start it up of course, but only takes a few moments to charge it back up.

Has anyone else encountered anything like this? Is there a mileage limit it needs to hit before it starts working? Temperatures have been in the 70s the past few days, so I dont think that is holding it up.

I'm not in a hurry to take it back to the dealer for a small issue like this, but would someday like to at least have the option of trying it out. Any input would be appreciated.

Cheers
I have this issue sometimes also. Take it to the dealer so they can submit the concern to FCA. My first thought was a weak battery but I load tested it and it passed. I doubt it is a bad alternator as it is charging normally. I drive roughly 30kms to work every day and 1/2 is highway so that should be more than long enough to charge. I have 22,000kms on mine and this started within the past 1-2 months. My issue is intermittent so of course when I took it in it wasn't happening. Luckily it is a good friend of mine that is the electrical tech at the dealer I took it to.

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post #8 of 45 (permalink) Old 10-22-2015, 10:06 AM
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Quote:
Originally Posted by ptrudel View Post
Definitely strange then...I remember reading somewhere that someone's ESS battery connector terminal wasn't connecting properly and gave that error code all the time. The connector was replaced and all was good (pretty sure I remember this)
With a good battery and good alternator, ESS should be available just a few blocks from where you start, a couple minutes tops. So this isn't normal. 14.4V means a healthy alternator and I doubt your battery is dying.
I'm with @ptrudel on the possible ESS voltage sensor bug. It is right at the positive battery terminal. We had a member here post a pic of it a while back (showing how to disable ESS) but I can't find it right now...
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post #9 of 45 (permalink) Old 10-22-2015, 10:11 AM
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I've only had my Cherokee for a month and for the first two weeks I got the same message. The battery was solidly at 14.4v but it always said it needed to charge for the ESS to work. Just about the time I was getting ready to call the dealership I was coming home and had to make a left turn across fairly heavy traffic. I had the radio up pretty loud and didn't notice that the engine had shut off while I was waiting for a gap to make my turn. Needless to say I got a bit of a surprise when I felt the vehicle start up right before I had to make a quick maneuver! :-)

Anyway, all that to say: chances are the ESS will suddenly start working one day. Not sure when/how it decides that the battery is strong enough but my guess is it will eventually.

Good luck!

2015 Trailhawk, Anvil Clearcoat, 3.2L, Cold Weather Group, Premium Leather Group, Ventilated/Heated Seat Group, 8.4N w/ Nav
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post #10 of 45 (permalink) Old 10-22-2015, 10:17 AM
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I still say take it in... It's not working as designed. It doesn't cost anything, other than your time. If FCA doesn't know about an issue they will NEVER come up with a fix.
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