Disabling ESS Auto Start/Stop .... Yes, I know....

[dmoney]

Like most of you, I loathe the auto start/stop "feature". I don't care what the research says, I don't care about "high-performance starters", there's no way I'm going to be convinced that stopping and starting all day long in traffic isn't harder on the powertrain than if it wasn't happening. I'm also not a fan of pulling hood-pins, or riding around with my seatbelt off just to "fool" the Jeep into thinking everything's A-OK.

I'm an electronics engineer, and while CANBUS architecture is by no means my strong point, I was able to design a little MCU that I interfaced with the bus behind the radio in my JLUR. Basically, it just sits idle, constantly monitoring the bus for the HEX string that indicates the transmission has been shifted into any forward gear (haven't checked this on a manual, but the theory should apply). Once that string is detected, the controller issues the HEX string to disable auto start/stop just as if the button had been physically pressed. This condition is saved until the ignition power cycles, at which time the sequence simply begins again, or if the "feature" is manually reactivated by pressing the button on the dash.

This is all currently in a tidy little jumble in my passenger seat, but since I got it working this last Friday, it's been flawless. Total power draw is less than 10ma, so standby battery draw is pretty nominal.

Once I get everything mounted up in an enclosure (having one fabricated as we speak) I will take some pictures and document everything here. Anyone with very basic electronics skill should be able to solder this inline with the bus/12VDC. Once some decent aftermarket radio harnesses become available, this could be installed without splicing anything on the vehicle.

If there's enough demand, and I have the time, I might be willing to spend some time building a few others.

Stay tuned!

Sponsored

 

[MACCTM]

Like most of you, I loathe the auto start/stop "feature". I don't care what the research says, I don't care about "high-performance starters", there's no way I'm going to be convinced that stopping and starting all day long in traffic isn't harder on the powertrain than if it wasn't happening. I'm also not a fan of pulling hood-pins, or riding around with my seatbelt off just to "fool" the Jeep into thinking everything's A-OK.

I'm an electronics engineer, and while CANBUS architecture is by no means my strong point, I was able to design a little MCU that I interfaced with the bus behind the radio in my JLUR. Basically, it just sits idle, constantly monitoring the bus for the HEX string that indicates the transmission has been shifted into any forward gear (haven't checked this on a manual, but the theory should apply). Once that string is detected, the controller issues the HEX string to disable auto start/stop just as if the button had been physically pressed. This condition is saved until the ignition power cycles, at which time the sequence simply begins again, or if the "feature" is manually reactivated by pressing the button on the dash.

This is all currently in a tidy little jumble in my passenger seat, but since I got it working this last Friday, it's been flawless. Total power draw is less than 10ma, so standby battery draw is pretty nominal.

Once I get everything mounted up in an enclosure (having one fabricated as we speak) I will take some pictures and document everything here. Anyone with very basic electronics skill should be able to solder this inline with the bus/12VDC. Once some decent aftermarket radio harnesses become available, this could be installed without splicing anything on the vehicle.

If there's enough demand, and I have the time, I might be willing to spend some time building a few others.

Stay tuned!

Look at the big brain on Brad!

 

[Xingpao]

I was hoping to purchase a titanium robot hand that will press the button for me Cousin It style when I crank her up.

 

[Tbackus]

I'd be down for one... Hell even instructions and a parts list I'd be ok with. Glad someone figured out something along these lines!!

 

[VRdiddy]

Yes Please!! The auto start stop is the worst thing ever!! At least for me I hate it. I know it’s not a Jeep thing and all new cars have it I wish they would allow you to have the option setting it in off with out having to press it every time you start the car.

 

[nova99]

We can all thank Obama and the insidious EPA for this nonsense. This auto start/stop shit that cannot be disabled permanently or programmed off as a default is an obamanation!!!

 

[mwilk012]

You people are insane, just push the button.

 

[thefrog]

You people are insane, just push the button.

LOL

 

[Bmore300]

Lol. Definition of first world problems/ obamanation etc but i definitely appreciate the ingenuity it took to build this.

 

[eugene]

It shouldn’t be there in the first place. It should be on taxis and leased cars. Not a car I’m gonna buy and have for ten years.

 

[WXman]

I clicked "ESS off" on my Tazer JL dash menu and it does exactly what the OP is describing here. So that's an option.

But, kudos for coming up with a home brew device on your own.

I still enjoy knowing that when I'm sitting in traffic there aren't dollar bills flying into the wind for no reason, but to each their own. ESS rocks if you ask me.

 

[Goin2drt]

Nicely done. I use the Tazer and in my wife’s Jeep we use the Start/Stop device that was already created but expensive.

We HATE ESS as well.

 

[twisty]

Like most of you, I loathe the auto start/stop "feature". I don't care what the research says, I don't care about "high-performance starters", there's no way I'm going to be convinced that stopping and starting all day long in traffic isn't harder on the powertrain than if it wasn't happening. I'm also not a fan of pulling hood-pins, or riding around with my seatbelt off just to "fool" the Jeep into thinking everything's A-OK.

I'm an electronics engineer, and while CANBUS architecture is by no means my strong point, I was able to design a little MCU that I interfaced with the bus behind the radio in my JLUR. Basically, it just sits idle, constantly monitoring the bus for the HEX string that indicates the transmission has been shifted into any forward gear (haven't checked this on a manual, but the theory should apply). Once that string is detected, the controller issues the HEX string to disable auto start/stop just as if the button had been physically pressed. This condition is saved until the ignition power cycles, at which time the sequence simply begins again, or if the "feature" is manually reactivated by pressing the button on the dash.

This is all currently in a tidy little jumble in my passenger seat, but since I got it working this last Friday, it's been flawless. Total power draw is less than 10ma, so standby battery draw is pretty nominal.

Once I get everything mounted up in an enclosure (having one fabricated as we speak) I will take some pictures and document everything here. Anyone with very basic electronics skill should be able to solder this inline with the bus/12VDC. Once some decent aftermarket radio harnesses become available, this could be installed without splicing anything on the vehicle.

If there's enough demand, and I have the time, I might be willing to spend some time building a few others.

Stay tuned!

I'm impressed with your fix but as mentioned there is a device that can already turn it off and do lots of other things too.

What would impress me more is if you came up with a way to remove the second battery that the starter works off of and have it work off the normal battery instead. I dont mind ESS that much except for the fact that my 5 day old JL has a warning light telling me to have it serviced already.. nice

My biggest gripe is batteries dont last long here in the dez and I dont relish buying two of them every two years, On a related note, has anyone noticed how freaking big the battery is (the one you can see). That is going to cost of fortune to replace. lol

 

[crazychile]

You people are insane, just push the button.

Ha Ha. We're stubborn.

My wife drives the JLU, but neither of us like the "ASS" feature. Old habits. If they just would have added a switch where you can set it to off once and not have to disengage it every trip....

Yeah, if truth in advertising were real, they would have had to call it ASS.

 

[mazeppa]

With the 8 speed auto you have 100% control the auto start/stop by how much pressure you hold on the brake peddle after you come to a complete stop, easy solution.

Sponsored