ess

(Disclaimer: Theories regarding the 3.6L ESS starting process are educated guesses, here's mine.) After months of people suggesting that the PCR separates the batteries before a cold start, I finally tested this several weeks ago. I found that the PCR is activated for a very brief instant...

Need help; When I was driving my Wrangler today I noticed that ESS wasn't working as usual, so I went into menus to check ESS message and it says due to steep grade, so I went to check Pitch & Roll and it was showing 6° on level ground. I was on my way to work so I dropped it off at the nearest...

I have been trying to get a read on if there is a difference between the 3.6 and the 2.0T regarding the ESS system. My suspicion is that the 2.0T system works better than on the 3.6. Folks seem diametrically opposed in their thoughts on ESS and I wonder if that's due to different experiences in...

Due to the quantity and length of ESS battery and electrical related threads, researching issues can be time consuming and confusing. I am using this post to make information and related links easily available. This first post will serve as a quick reference and I'll use the second post to...

Hey there, Not sure if this should be located here, but has an option to permanently disengage the Enginer Stop-Start (ESS) been implemented in way that wont void my warranty? Thank you!

This is a short story. Came back from a two week vacation and went to use the JLUR today only to realize it was 100% dead. No electrical sign of any kind. The vehicle never had electrical issues before and has always been in the garage. Weather here in Chicago has been pretty cold and snowy...

I thought I'd start this thread for discussing the operation of the IBS. First is a link to the technical description of the IBS from Bosch. The rest of the post is my interpretations and observations...

I have observed that there may be a need for some basic ESS based electrical theory. For those that struggle to understand how electricity works, some basic electrical concepts can be better understood by using basic plumbing concepts. Substituting water for electricity, pipes for wire and water...

I am having an issue with my 2018 JLU Sahara. I purchased it new off the lot with 6 miles on it. When I left the dealership (David Stanley in OKC), it had the check engine light on, ABS light on, traction control light was on, the ESS wouldn't engage, the cruise control would not work, 4wd...

I've seen quite a few posts related to failed Aux batteries causing flaky or dead electronics, stalling and failing to start/auto restart. I've come up with a simple way to temporarily bypass a bad Aux battery (also blown PCR fuse or bad PCR) and get back on the road. Warning - this post...

So, this video explains a study that was done to compare how much fuel is used by idling your car (say at a stoplight or train track) vs. shutting off and restarting the engine (for example, using an ESS system). It turns out that there is some pretty good evidence to suggest that using an ESS...

To make things short and sweet I've been doing a decent amount of wheeling with my JL, no issues until about 2 months ago. While wheeling with a couple jeeps and two F250 super duties I had to use my winch for the first time. One truck got stuck, pulled him out, 2 minutes later the same truck...

I have searched the forum and haven't seen this issue, so I apologize if I missed it in my search. I have a manual transmission and I didn't realize that I had the ESS feature until I started to get out of the Jeep this morning and it started up as I exited - I had been sitting there trying...

Hello, I recently completed the safety recall U62 which reprograms the powertrain control module. Jeep Cares clarified that this recall in fact addresses the cruise control feature problems that people might have experienced. I just want to ask if anyone has experienced different behavior...

Main battery - provides for HVAC, light, radio, ECU and other critical system functions. ESS/Auxiliary battery - ESS and Ignition Start During stop/start active mode, the computer is monitoring the main battery. If the main battery charge falls to some threshold of charge, the ESS starts the...

OK. I got my JLU (Automatic)on Saturday night. On my way home from the dealer I pulled up to my first red light. The engine shut off, as expected. But as soon as it did, a message popped up in the information center that said “Shift to P Then Desired Gear” It does this every time ESS kicks in...

The 2018 owners manual says "It is recommended that the Start/Stop System be disabled during off-road use." Likewise, Start/Stop (ESS) is automatically disabled when the transfer case is in 4LO. This is all well and good for off-roading. The integration of eTorque/BSG and the ESS system for the...