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Yes.
Heimkehr
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Isolating the ESS battery merely prevents it from eventually cannibalizing the main battery. The ESS function itself needs to be defeated via a separate effort.
AndySpill
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It will as mentioned but--and maybe it was just a curiosity question--why do it?
Sure, pretty much other manufacturers do ESS with one battery, but especially with owners who add lots of current hungry appliances to their dual AGM battery JLs, you're running that ESS event with your cranking battery.
Owners have not only reported the voltage sensitive radio taking a hit with one battery ESS events, but despite the early termination of an ESS event if the voltage gets too low, I wouldn't want to chance it at 2AM, making a left turn on a busy highway, if you catch my drift : much that I'll bet that at least "9 times out of 10" you'd be fine.
Let's look at it this way, I doubt that Stellantis added cost and complexity with the dual batteries for no reason.
THAW
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Ignore advice from those who worry highways might be busy at 2 am; ESS events won't occur unless the CR[an]K (main) battery can easily handle them.
The only reported side effect of running ESS without the AUX (ESS) battery is a popping noise from the amplifier during restart - most users either don't experience or don't notice it.
The only reported side effect of running ESS without the AUX (ESS) battery is a popping noise from the amplifier during restart - most users either don't experience or don't notice it.
AndySpill
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@THAW @rickinAZ
Foster's right Rick. After all, if you can't recrank after an ESS event, where having a running engine on a public road is important (and of course the urgency of that ranges from important to critical) don't worry, Foster is going to come rescue you.
You see, Foster thinks he's smarter than Stellantis: the latter who after all put that second battery into dual AGM battery JLs for their ESS events simply because executives there were unhappy with how little they were charging the public for JLs, so they said, "let's raise not simply the cost of the vehicle by putting in a mismatched second battery in parallel, but the cost to maintain that vehicle down the road."
(And in case anyone isn't following, the above is sarcasm.)
Foster, go search. At the very least people have reported that running ESS events on one battery effects the sensitive electronics in the entertainment system. So no, at the very least it's more than a mere popping noise from the amplifier at restart.
But no worries, even it it is just that, but that action craps out the radio, Foster will replace the entertainment system for you gratis.
But seriously, let's get beyond radios. The reality is that JL owners, perhaps more than an others, have propensity to equip their vehicles with aftermarket current hungry appliances, from winches to lights, to amplifiers to offroad gear, and on a cold night, after periods of using that equipment, on a battery that probably should have been swapped months ago, you are chancing the vehicle early terminating that ESS event because that battery voltage dropped, unreplenished by the alternator of a shut off engine, in time to have adequate power to crank.
(Recall that in factory design that your cranking battery is (pretty much) sparred during ESS events, power supplied by the ESS battery in dual AGM JLs.)
And it probably will. But while Foster's busy correcting people he hasn't taken the time to do a little cost benefit analysis here. On the bright side, if that ESS event lasts beyond around 7 seconds you're saving pennies of gasoline. That's got to be worth it right?
I run dual factory batteries and ESS events; one of the few. I have no issue with those who disconnect the Aux battery and reroute power calls to it back to the main battery with a Fuse 42 pull or N1-N2 jumper, preventing the PCR from energizing and isolating, or simply isolating power respectively. But in addition to your vehicle now, with this change, polling the main battery at cold crank, not the ESS battery as designed, to gauge its power for such ESS events, I choose to operate on the side of caution and advocate keeping the ESS system, which about 99% of you hate already for a multitude of reasons not the least being concern of engine wear, off when running a dual AGM battery JL with one battery.
Foster, if you want to do differently on your vehicle, be my guest.
Foster's right Rick. After all, if you can't recrank after an ESS event, where having a running engine on a public road is important (and of course the urgency of that ranges from important to critical) don't worry, Foster is going to come rescue you.
You see, Foster thinks he's smarter than Stellantis: the latter who after all put that second battery into dual AGM battery JLs for their ESS events simply because executives there were unhappy with how little they were charging the public for JLs, so they said, "let's raise not simply the cost of the vehicle by putting in a mismatched second battery in parallel, but the cost to maintain that vehicle down the road."
(And in case anyone isn't following, the above is sarcasm.)
Foster, go search. At the very least people have reported that running ESS events on one battery effects the sensitive electronics in the entertainment system. So no, at the very least it's more than a mere popping noise from the amplifier at restart.
But no worries, even it it is just that, but that action craps out the radio, Foster will replace the entertainment system for you gratis.
But seriously, let's get beyond radios. The reality is that JL owners, perhaps more than an others, have propensity to equip their vehicles with aftermarket current hungry appliances, from winches to lights, to amplifiers to offroad gear, and on a cold night, after periods of using that equipment, on a battery that probably should have been swapped months ago, you are chancing the vehicle early terminating that ESS event because that battery voltage dropped, unreplenished by the alternator of a shut off engine, in time to have adequate power to crank.
(Recall that in factory design that your cranking battery is (pretty much) sparred during ESS events, power supplied by the ESS battery in dual AGM JLs.)
And it probably will. But while Foster's busy correcting people he hasn't taken the time to do a little cost benefit analysis here. On the bright side, if that ESS event lasts beyond around 7 seconds you're saving pennies of gasoline. That's got to be worth it right?
I run dual factory batteries and ESS events; one of the few. I have no issue with those who disconnect the Aux battery and reroute power calls to it back to the main battery with a Fuse 42 pull or N1-N2 jumper, preventing the PCR from energizing and isolating, or simply isolating power respectively. But in addition to your vehicle now, with this change, polling the main battery at cold crank, not the ESS battery as designed, to gauge its power for such ESS events, I choose to operate on the side of caution and advocate keeping the ESS system, which about 99% of you hate already for a multitude of reasons not the least being concern of engine wear, off when running a dual AGM battery JL with one battery.
Foster, if you want to do differently on your vehicle, be my guest.
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