[Fj4080]

A perfect world.....cute and free don't usually go together.

You haven't seen me yet 6'5" GenX cuteness and all the free unwanted advise you can handle!

 

[Fj4080]

Having replaced the battery the day after I got it, and having replaced the IBS yesterday, I had run it several times without seeing the ASS error.

But just now, going out and starting it up for an entirely different purpose, to get a picture of a different screen, this came up again.

Where should I look next as far as trying to solve this?

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Also make sure your door was shut and you had the wheels straight. The Jeep can throw this message if the wheels are turn one way or another.

 

[Fj4080]

Counter Point:

No one hates these stop/start systems more than me and I will always turn them off as long as I have the ability to do so, and let's all be happy that we can!

But it is not a useless feature and if anyone thinks that that engineers did not test the hell out of these systems before putting them in their vehicles, they are simply ignoring reality.

Wear and tear on the starter? Sure, but obviously the engineers knew that and designed starters that can handle it. Think about it, have you ever seen a post here where someones starter has failed? Nope, it's probably the most reliable and longest lasting part you will find on our Jeeps.

Excessive electrical use? Sure, but beefy, expensive AGM batteries and IBS sensors are designed to mitigate that. Granted, we could debate how well that is actually working in the real world, but IMO our batteries suffer more from non-use (short trips, sitting for days without driving, etc) than the ESS system itself. Again, a debatable subject...

Gas savings? Well, tests show that stop/start systems save a lot more than 5 dollars a year in gas. Actual real world testing showed an improvement of 4 - 8.7 percent, which is nothing to sneeze at! How much you save depends upon your driving habits and where you live. These systems obviously help the most when you have a lot of stop and go driving in your daily drives with the biggest benefit being sitting at stop lights for long periods of time.

Below is a video which I think explains these systems well. I still hate ESS, but I can understand why manufacturers implemented these systems to help them meet EPA requirements.

The best part is since I never use the ESS system my heavy duty starter and alternator should be good for years.

 

[Fj4080]

I didn't mention the alternator, but yep, that is a beefed up part as well.

And being an old guy, I have replaced lots of starters and alternators over they years, but I doubt I will ever have to worry about that with my Cherokee.

Ah the good old days of car maintenance....I do miss the days gone by.

 

[Fj4080]

Don't blame the engineers, blame the cost cutting guys in the C-suite. One of my friends was an engineer his entire career, and that is what he hated about his job. The inability to design things the right, most robust way due to budget restraints put upon him and his team.

But with ESS the only realistic way it could be done was to over engineer things. And I guarantee that the engineers still had to fight with upper management to get them to understand that they couldn't go cheap on the system.

Now if only the engineers at Boeing could convince their management to do things the right way. 😮

Fun fact, I retired from a Boeing owned subsidiary. I was employee number 75. Somewhere around employee 700 they bought us out and everything went down hill from there. I got a nice stock buyout and retired. My brother followed suit and retired a couple of years later. I was in propulsion and he was in logistics.

Home - Insitu

With over 1.3 million operational flight hours and more than 30 international customers, Insitu is a trusted partner for UAS worldwide.

www.insitu.com

 

[Fj4080]

Fun fact, I retired from a Boeing owned subsidiary. I was employee number 75. Somewhere around employee 700 they bought us out and everything went down hill from there. I got a nice stock buyout and retired. My brother followed suit and retired a couple of years later. I was in propulsion and he was in logistics.

Home - Insitu

With over 1.3 million operational flight hours and more than 30 international customers, Insitu is a trusted partner for UAS worldwide.

www.insitu.com

A couple of mementos. A model of the ScanEagle, a stealth propeller, and a ScanEagle challenge coin given to me for my support for overseas operations.

 

[Fj4080]

OK, so now my attention is being turned to the hood switch, as suggested by @antpennino.

Must have been elsewhere, but somewhere I saw something about there being TWO hood switches on any ASS-equipped Jeep.

I have taken note that an icon lights up on the dashboard when the hood is open.

I have taken note of this object, shown in the pictures below, that is very obviously intended to be a switch to detect whether the hood is open or closed. With the help of my wife, @Seanette (she watching the dashboard while I push and release this switch), I have determined that this switch does not affect the hood-open icon on the dashboard, so obviously, there is a different switch elsewhere, that controls that.

So, this must be the switch that affects ASS, right? Any guidance on how to R&R it, or what the part number is for a replacement? Having not yet tried, it looks like it could be easy to R&R, or it could be a big pain in the ass (no pun intended, but perhaps it should have been).

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I believe there is one on the hood latch as well..don’t quote me though.