I'm still trying to figure out why anyone would run a compressor, a LOT and with the engine off :thinking:
so if you have the climate controls selected to Auto the auto start stop will not function
strange I have max AC mode on yet when auto is selected the ESS doesn't function. As soon as I deselect Auto it starts working...I don’t think that’s right. I have the A/C on Auto most of the time and the ESS functions normally. But, as noted in the manual, the ESS will not engage if the cabin is not at or close to the set temperature or if the MAX A/C mode is set. See page 326 of the manual for a LONG list of other conditions.
Something much more complicated than I’m used to is going on with the JL charging system. Maybe someone here can explain?
What I noticed today: after a few hours of wheeling at Hollister Hills I pumped up my tires again for the trip home (this time with the engine running) and set off on the highway. When I got the the first stop I noticed that the Engine Start/Stop didn’t stop the engine as usual. I checked the status and it said something like “not ready because of battery saving mode”. So I checked the battery voltage and it said 12.7 or 12.6. Oddly (for me anyway) the voltage did NOT increase when in revved up the engine but it did increase to 13.5 or so when I was coasting at zero throttle. This continued all the way home (80 miles). A few house later I drove it around the block and it was back to normal: ESS worked as soon as the engine heated up.
So what’s going on? It seems like it’s not charging the battery most of the time.
This is the same issue I was having. It is exactly how Jeep designed the charging system though. It is designed to put as little load as possible on the system for fuel conservation.Something much more complicated than I’m used to is going on with the JL charging system. Maybe someone here can explain?
What I noticed today: after a few hours of wheeling at Hollister Hills I pumped up my tires again for the trip home (this time with the engine running) and set off on the highway. When I got the the first stop I noticed that the Engine Start/Stop didn’t stop the engine as usual. I checked the status and it said something like “not ready because of battery saving mode”. So I checked the battery voltage and it said 12.7 or 12.6. Oddly (for me anyway) the voltage did NOT increase when in revved up the engine but it did increase to 13.5 or so when I was coasting at zero throttle. This continued all the way home (80 miles). A few house later I drove it around the block and it was back to normal: ESS worked as soon as the engine heated up.
So what’s going on? It seems like it’s not charging the battery most of the time.
I agree. Showing info usually causes more bad than good. When the digital gauges were added to the JK in 13/14 It caused huge warranty spikes because people saw the higher water temps which were actually normal for the 3.6 and took them in for overheating even though the physical gauge showed right in middle and no lights, codes etc. Your vehicle will tell you if something is wrongSo what's the problem? A fully charged battery is 12.6/12.7 volts or above. Maybe instead of just removing Offroad Pages they should remove EVERYTHING so everybody can chill out.
What you are used to is old vehicles that run a constantly excited alternator. Voltage doesn't matter. It's calculating battery state of charge. If it thinks battery is charged it will only run alt hard enough to supply necessary current to keep vehicle running. Not extra to run vehicle and charge battery as it's already charged. All new vehicles do this. It's for fuel economy but it also greatly extends battery and alternator life as well. We were doing this in other industries I worked in decades ago. The auto folks have only started doing it recently.Problem is that on long drives my auto start will not even kick in as it states the voltage is to low. This happens around 12.4 and when I go long streatches without coasting. I am fine with it as it is designed that way. But at that time it had me concerned as I am used to 14.1 while motor is running.
What you are used to is old vehicles that run a constantly excited alternator. Voltage doesn't matter. It's calculating battery state of charge. If it thinks battery is charged it will only run alt hard enough to supply necessary current to keep vehicle running. Not extra to run vehicle and charge battery as it's already charged.
Did u add extra accessories to the vehicle? If so where did you tie them in? You didn't put anything to the negative terminal on the battery post side of the current sensors did you?
Sent via....
I did read your posts. What was your 2016? 2018 JKs even use old tech charging along with many other vehicles.Pretty sure you did not even read my posts. Even the tech that rode with me was surprised at the charge the software called for at different times. All was in spec and I am fine with it. And yeah I guess if 2016 is old tech at this time that is what i am used to. It still makes no since that the battery will be allowed to go to low for the main system in place for mileage.
Pretty sure you did not even read my posts. Even the tech that rode with me was surprised at the charge the software called for at different times. All was in spec and I am fine with it. And yeah I guess if 2016 is old tech at this time that is what i am used to. It still makes no since that the battery will be allowed to go to low for the main system in place for mileage.