Auto Stop/Start Stopped working.

[SargeDiesel]

Sarge, it sounds like your your aux battery is faulty. That was the problem with mine even though the dealer claims it tested good. After they replaced my aux and main battery, I’ve been trouble free with the Stop/Start System.

Attached is a picture of my charger location and circleswhere attached to the battery. I haven’t had to us it since replacing both batters.

note to self, if this problem occurs again, I’m going todo that dual battery kit that everyone raves about on this forum.

Thanks, @ShadowsPapa has been a wealth of knowledge helping me figure this out. I appreciate you taking the time to post this pic. I have two chargers/maintainers, one a 2a and the other a 4a, I haven't tried to charge the AUX battery separately (will today).... but I had my semi-permanent charger connected to the fender ground that the IBS/main battery ground goes to. I think I will relocate it to the location you show(and others have suggested).

I have a battery load tester, I'm just not sure where/how to connect it with our parallel setup.... in order to test each batteryindependently. (Probably best to let the ?dealership? do it...... let the games begin ?......)

I have never had an issue with the main battery, it starts strong every time (even after sitting for several days)..... with that said, I believe the only (user installed) draw on the batter when turned off is my dash cam, but it is connected to the main +positive and the fender -neg ground, so it's running off the main battery.

I like your idea about the dual battery setup, but being an oil burner, so my setup would be a little different I think.

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[Mr._Bill]

Thank you for the info.......

So if tested & fails at start-up, I wouldn't get the "battery charging " error, because it would not send a charger due to failure ?

So from getting the "not ready " only, would this lead you to believe the AUX battery is bad, or just low from lack of driving ?

So the IBS, doesn't monitor both batteries ? If not, is the only reason the -neg cables are bound together ontop of the main battery for the parallel connection ?

The IBS only monitors the current flow in and out of the main battery. The cables are tied together at the negative post for design convenience. It could be done anywhere, as long as each negative is tied to the frame, but closer to the source is better.

The ESS Not Ready/Charging is a Status Message not an Error Message. It could just mean the truck has not been driven enough and the batteries are at a lower charge level, or it could be an indicator that one or both of the batteries are failing.

 

[SargeDiesel]

The IBS only monitors the current flow in and out of the main battery. The cables are tied together at the negative post for design convenience. It could be done anywhere, as long as each negative is tied to the frame, but closer to the source is better.

The ESS Not Ready/Charging is a Status Message not an Error Message. It could just mean the truck has not been driven enough and the batteries are at a lower charge level, or it could be an indicator that one or both of the batteries are failing.

Thanks for the explanation.... my main battery has never failed, I get a very strong startup everytime, the only message I ever get is "not ready "..... I have never received a message that includes "battery charging ".....
hince the confusion, its not indicating why it's not ready.

 

[Mr._Bill]

Thanks for the explanation.... my main battery has never failed, I get a very strong startup everytime, the only message I ever get is "not ready "..... I have never received a message that includes "battery charging ".....
hince the confusion, its not indicating why it's not ready.

The ESS system is always active and monitors all the systems in the truck. There are a myriad of conditions that will prevent it from activating, some are outlined in the manual. The ESS screen on the console will provide some Status Messages of its current state, but if not on that screen there are no messages or indicators unless it detects a ESS battery failure at startup.

It is also possible that there has been a programming change in newer models and it has stopped providing detailed Status Messages.

 

[ShadowsPapa]

The ESS system is always active and monitors all the systems in the truck. There are a myriad of conditions that will prevent it from activating, some are outlined in the manual. The ESS screen on the console will provide some Status Messages of its current state, but if not on that screen there are no messages or indicators unless it detects a ESS battery failure at startup.

It is also possible that there has been a programming change in newer models and it has stopped providing detailed Status Messages.

My 2022 tells me if it's due to battery charging of cabin temp/heating/cooling, even if the engine isn't up to temp or I have the steering wheel turned, it says so.
But for anomalies, like a misfire or other things, it doesn't say.

It won't tell you of things like this -

Although mine has griped about an ambient temp of less than 110 - I sure wish I was the one programming these messages, I'd have some real fun with this one!

 

[SargeDiesel]

My 2022 tells me if it's due to battery charging of cabin temp/heating/cooling, even if the engine isn't up to temp or I have the steering wheel turned, it says so.
But for anomalies, like a misfire or other things, it doesn't say.

It won't tell you of things like this -

Although mine has griped about an ambient temp of less than 110 - I sure wish I was the one programming these messages, I'd have some real fun with this one!

On mine JTRD, it will also say, seat belt, wheel turned... but other than "not ready" I haven't seen any other messages.

 

[SargeDiesel]

On mine JTRD, it will also say, seat belt, wheel turned... but other than "not ready" I haven't seen any other messages.

Ok.. decided to do a little experiment..... after several people saying they reset their IBS, I decided to do the same.

I also took this opportunity to charge the AUX battery independently from the main battery.

Completed Aux battery reading:

I then charged the main battery independently.

Completed main battery reading:

I then reconnected the IBS and connected both batteries back into their parallel setup. I then checked the voltage inside the cabins message center.

This was the result (12.7v)

I started the vehicle to check the ESS status and FOR THE FIRST TIME EVER.......I GOT THE "BATTERY CHARGING " status reading.

So after getting this reading I started and drove the vehicle a short distance and repeated this several times. (from my understanding, the IBS needs several start cycles to re-learn)... after this, I still was receiving the "battery charging " message.

So at this time, I decided to reconnect the charger/maintainer and continue to charge the batteries in parallel until they enter maintenance mode. Once this happens, I will recheck the voltage at the main battery and inside the cabin (with just the ACC engaged).... then I will start the vehicle and drive around the neighborhood to see if I still receive "battery charging " or a "ready" status message.

Any thoughts ? I hate beating this subject to death, but considering just when I think I've got it figured out, something changes... lol

 

[Mr._Bill]

I think you are on the right path. Charge each battery, reset the IBS, and then charge until finished. Not much else you can do. A lot of odd issues will clear up with a system reboot, which you get after disconnecting both batteries. If you have the 8.4 Uconnect, it takes about 24 hours to return to normal operation after a reset.

 

[SargeDiesel]

I think you are on the right path. Charge each battery, reset the IBS, and then charge until finished. Not much else you can do. A lot of odd issues will clear up with a system reboot, which you get after disconnecting both batteries. If you have the 8.4 Uconnect, it takes about 24 hours to return to normal operation after a reset.

I appreciate you letting me know..... I do have the 8.4 .... currently, batteries are still charging. I would think it wouldn't take as long as it is, since they were both charged individually, but its almost like the IBS, resets them or does a discharge before recharging them. It would be great to get a "ready" message once fully charged... fingers crossed.... if not, may be time for a dealership visit.

 

[SargeDiesel]

I think you are on the right path. Charge each battery, reset the IBS, and then charge until finished. Not much else you can do. A lot of odd issues will clear up with a system reboot, which you get after disconnecting both batteries. If you have the 8.4 Uconnect, it takes about 24 hours to return to normal operation after a reset.

Also, just to clarify, to reset the IBS or the system...... all you need to do it disconnect the main battery -negative and remove the IBS sensor from the bundle for atleast 10 minutesor so ?

 

[jebiruph]

Also, just to clarify, to reset the IBS or the system...... all you need to do it disconnect the main battery -negative and remove the IBS sensor from the bundle for atleast 10 minutesor so ?

There is a 2 wire connector plugged into the IBS, to reset the IBS just unplug that connector for some amount of time.

 

[SargeDiesel]

There is a 2 wire connector plugged into the IBS, to reset the IBS just unplug that connector for some amount of time.

Thanks, I didn't do that, but it seemed like it reset by removing it from all battery connections... I had to interrupt my charge (starting raining) but I will unplug it tomorrow for for about 30 minutes and then reconnected it before I start the charge again.

 

[jebiruph]

Thanks, I didn't do that, but it seemed like it reset by removing it from all battery connections... I had to interrupt my charge (starting raining) but I will unplug it tomorrow for for about 30 minutes and then reconnected it before I start the charge again.

You need to reset it once the batteries are fully charged, resetting it before that won't make any difference.

 

[Mr._Bill]

Also, just to clarify, to reset the IBS or the system...... all you need to do it disconnect the main battery -negative and remove the IBS sensor from the bundle for atleast 10 minutesor so ?

Resetting the IBS just involves completely disconnecting it for about 10 minutes. The two wire connector on the IBS is the feed into the computer system. Rebooting the system requires both batteries to be disconnected. The negative cable from the ESS battery and the negative post on the main battery both need undone.

 

[jebiruph]

Resetting the IBS just involves completely disconnecting it for about 10 minutes. The two wire connector on the IBS is the feed into the computer system. Rebooting the system requires both batteries to be disconnected. The negative cable from the ESS battery and the negative post on the main battery both need undone.

One of the two wires is 12v power. Removing the two wire connector will power cycle the IBS, won't that reset it?

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