Auto Start Stop and Traction Control threw a code at the same time.

[mgroeger]

UPDATE:
Just got in the Jeep to get ready to hit the trails and the auto stop start error is no longer on the screen. My guess is I actually have two independent issues happening and I might have fixed the ESS with the new AUX battery. Time will tell on that. Getting ready to go wheeling, will report back if anything changes.

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[mgroeger]

agreed....and yet when I (forget me) and long time poster/extremely knowledgeable Jerry @Jebiruph reported the changed behavior after this TSB (I personally tested it) I was forced to conclude this cause and effect, that maybe (or maybe not) FCA was less than forthcoming in disclosing as part of the TSB flash, because to do so implies a "problem in need of addressing."

"No problem with our ESS batteries," says FCA....none at all

if you catch my drift Mike. ?

As you may know, the standard startup procedure for the 3.6L JL is to isolate the ESS/Aux battery for an instant pre-engine crank to check its power.

If inadequate, prior to this TSB, and any hacks like the ones Jerry introduced, like fused jumpering of terminals T1 and T2 in the Power Distribution Center (sources available on request) you were stranded.

If adequate, the main battery was connected in parallel to the ESS/Aux battery and both provided energy to crank the engine.

With the TSB, if the initial attempt to crank fails because the ESS/Aux battery's power is inadequate, upon second attempt to cold crank, power is switch to the main battery, the ESS off light is thrown on to the dash, and ESS remains off (and this ESS off light illuminated) until the next cold crank, if any, where the ESS/Aux battery has sufficient power to pass this pre-crank test, be it as a result of charging and/or replacement, and/or rewiring to run the rig with one battery (sources available upon request).

Cheers ?

If the TSB isn't for you Mike, and you want to know other ways to preventatively or in response to being stranded by this, responsively deal with the issue, just me know. There are quick wiring solutions.

Thanks! Yeah, I had a hard look at ditching the AUX battery all together and doing the bypass but decided against it for now. Still under powertrain warranty and for now want to keep this 4x4 computer the way it was designed.

 

[McGilli]

out of nowhere I get the Auto Stop Start fault light (the letter A with a circle arrow around it) AND at the same time the ESC swervy skid mark with a Jeep warning light indicator show up on my dash.

Happened to me a month ago. Took it to the dealer and they said it was becasue my wheels were out of alignment.

They cleared the code - but it came back later in the day.

Was waiting for my alignment to happen the next day actually.

Had my wheels aligned the following day and it went away.

 

[Gee-pah]

Happened to me a month ago. Took it to the dealer and they said it was becasue my wheels were out of alignment.

They cleared the code - but it came back laster in the day.

Was waiting for my alignment to happen the next day actually.

Had my wheels aligned the following day and it went away.

Wow, that sounds almost...(drum roll) plausible.....

As I bet you know, a steering wheel turned too far (or in your case a computer that thinks the steering wheel is turned too far because of an alignment issue) is one of the many conditions for ESS not engaging--but usually there's no indication of this on the dash....

I think this shutting ESS off in such situations has to do with the fact that, or so I heard, power steering in ESS events is handled by the main (i.e. cranking) battery that is normally spared during ESS events to insure it has the power to get us out of ESS events.

 

[mgroeger]

OK, you're never going to believe the second part of what I'm going to say.

First Part - Turns out wheeling the crap out of your Jeep on John's Trail in Sand Hollow is the perfect remedy for ESC U0432 code because after I was done the error went away. Who knew.

Second Part - The Mrs. was driving her Jeep home from said Sand Hollow trip and about 1/4 mile from home... voila... THE EXACT SAME TWO DASHBOARD WARNING LIGHTS CAME ON>>> WTH!!!

I'm too tired to even care right now but I am very curious to see what the Tazer says the code is. Will report back later. It's like my Jeep gave her Jeep herpes or something.

 

[mgroeger]

Happened to me a month ago. Took it to the dealer and they said it was becasue my wheels were out of alignment.

They cleared the code - but it came back later in the day.

Was waiting for my alignment to happen the next day actually.

Had my wheels aligned the following day and it went away.

When you say it happened to you a month ago do you mean you got both the warning lights or just the ESC one?

 

[McGilli]

When you say it happened to you a month ago do you mean you got both the warning lights or just the ESC one?

Mine gave me a few more warnings:

https://www.jlwranglerforums.com/fo...y-issue-or-fuses-resolved.60252/#post-1291627

But even start from the top of the thread just in case... Hope something helps!

 

[Yellow Cake Kid]

...Turns out wheeling the crap out of your Jeep...

So even with the warning notice you were able to engage the front wheels in 4WD?

That would be good news.

 

[mgroeger]

So even with the warning notice you were able to engage the front wheels in 4WD?

That would be good news.

Everything worked fine... 4H, 4L, lockers, swaybar disco.

 

[Rico1111]

Anyone got any more info on this, is the alignment the fix?

 

[mgroeger]

Anyone got any more info on this, is the alignment the fix?

Make sure you steering wheel is straight and if it isn't adjust your drag link to make it straight. Then go out on some dirt and get into 4LO and drive a little. That did the trick for me.

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