Deep sleep after being on charger for six days

[inline_five]

I don't understand this. I've babied this battery, plugging it into a maintainer anytime it's sat more than a day in my garage.

Everything was fine prior, I left on a six day trip and:

• Plugged in a Noco Genius 5
• Disabled all telemetry
• Locked truck
• Placed key inside house in faraday cage pouch

When I came home, vehicle was in deep sleep and interior lights did not come on. I noticed when I removed the charger and waited about 10 mins, voltage was down to around 12.2v, after being on a charger for almost a week. Less than 18 months old.

???

Sponsored

 

[HeyBales]

Bad cell in battery?

Voltage sounds high enough to not be reason, but it's estimate of SOC could be below 50% still - so it engaged DS mode.

ETA - though with TCU disabled (on truck?), that could be battery saver changes, not deep sleep, which turns off the TCU which you already did, perhaps.

 

[fstlan3]

How are you connected to the battery? Direct to the negative terminal or through the BMS post?

 

[inline_five]

How are you connected to the battery? Direct to the negative terminal or through the BMS post?

No, it was attached to the hybrid jump points under the hood.

 

[fstlan3]

No, it was attached to the hybrid jump points under the hood.

This science is beyond me I just know this SOC stuff is an obsession for F-150 PowerBoost owners. They think the BMS is the devil, which generally it can be because it targets around an 80% SOC so even though you had it on a charger the whole time the BMS was likely mitigating it

 

[HeyBales]

This science is beyond me I just know this SOC stuff is an obsession for F-150 PowerBoost owners. They think the BMS is the devil, which generally it can be because it targets around an 80% SOC so even though you had it on a charger the whole time the BMS was likely mitigating it

Well, that's for charging logic, from the DCDC (and it doesn't stop charging at 80%, just goes to topping/float charge). Not what it's allowed to received from a jump which is same pathway as this charging setup.

Someone had a wiring diagram awhile back that while those jump points do go thru fuses it doesn't go thru BCM for any amp control, only the battery sensor is inline then, and that's just measurements reported back to BCM.
And it doesn't log charging while key off, only when running.
Hence the 8 hr relearn with doors locked being needed with a charged battery.

 

[fstlan3]

Well, that's for charging logic, from the DCDC (and it doesn't stop charging at 80%, just goes to topping/float charge). Not what it's allowed to received from a jump which is same pathway as this charging setup.

Someone had a wiring diagram awhile back that while those jump points do go thru fuses it doesn't go thru BCM for any amp control, only the battery sensor is inline then, and that's just measurements reported back to BCM.
And it doesn't log charging while key off, only when running.
Hence the 8 hr relearn with doors locked being needed with a charged battery.

Like I said this is beyond my awareness level. I just know there’s pages and pages of people working to resolve the issues you mention and a lot of it has to do with how the BMS handles charging both key on and key off though I could be interpreting it all wrong

 

[b534202]

First thing that comes to mind would be a bad charger. Did you test it on another battery?

 

[HeyBales]

Like I said this is beyond my awareness level. I just know there’s pages and pages of people working to resolve the issues you mention and a lot of it has to do with how the BMS handles charging both key on and key off though I could be interpreting it all wrong

No, you are reading correctly that it's messed up.
I've been seeing those too.

I was just pointing out that charging thru the jump points isn't going to engage the BMS limiting the charge to 80% of SOC, which isn't a thing anyway.
It doesn't appear to track charging key off, the relearn process is what the manual states needs to be done on charged battery.

Like I said, it just goes to lower charge rate at 80% (actually well before for many of us).
Just like alternator based systems controlled by the PCM have been doing for years.
Difference being battery under hood, or battery in cab.
Same fine controls are possible either way, even easier with hybrid - Ford just seems to be trying to skate the line too close (probably for efficiency sake) in the hybrids, and they are wearing bad glasses and going right over it.

 

[colinl]

First thing that comes to mind would be a bad charger.

(edit) I see the OP actually does say what charger, and it's a good one.

assuming the right battery type and charge mode were selected, which is not overly difficult, then either the charger is bad or the battery is going bad. and I do see some reviews of this charger where people have complained about theirs dying or having issues with the power cord.

 

[MakinDoForNow]

Just FYI my 12volt saw my genius 5 quite a bit after 15 months. I would check voltage in cig style power point and put g5 on when I would see 12.1v or less. At 34 months primarily because of pending warranty expiration, I stopped by dealer for the "free" battery check which was the 20 second handheld checker that showed battery good but low, charge it printout. I took that printout to service rep inside and said this low is what I see all the time and I put maintainer on battery. After some relative quite conversation which while stressed I find difficult to do at 81 with high blood pressure she said that there was more thorough test but they would need truck overnight so I agreed and called wife to come get me. The rep then fishingly asked pointed questions which I somehow answered like she wanted to justify the "biggie test". After one or two more days she called and said the battery had a bad cell and replaced the original BXT99RT4A 390 CCA (40 amp?) with a BXT99RT4A MAX series (same number ?) 470 CCA with higher Reserve capacity. So I feel that with a lot of maintainer time with optimization to help keep bad cell limping along I got by for months with a weak cell. I don't have Ford pass on my phone so never got a deep sleep message and truck never failed to start. Wife has Ford pass on her phone but never said anything about a deep sleep message. The new battery can see 12.6 volt some of the time but mostly at 12.4 but will see 12.1 after 5 days of non use. So apparently have good battery but seldom sees 100% but can with 8+ hours of run time. Need that 2025 first qtr fix!

 

[inline_five]

First thing that comes to mind would be a bad charger. Did you test it on another battery?

Charger is good and set to lead acid 12v.

Just FYI my 12volt saw my genius 5 quite a bit after 15 months. I would check voltage in cig style power point and put g5 on when I would see 12.1v or less. At 34 months primarily because of pending warranty expiration, I stopped by dealer for the "free" battery check which was the 20 second handheld checker that showed battery good but low, charge it printout. I took that printout to service rep inside and said this low is what I see all the time and I put maintainer on battery. After some relative quite conversation which while stressed I find difficult to do at 81 with high blood pressure she said that there was more thorough test but they would need truck overnight so I agreed and called wife to come get me. The rep then fishingly asked pointed questions which I somehow answered like she wanted to justify the "biggie test". After one or two more days she called and said the battery had a bad cell and replaced the original BXT99RT4A 390 CCA (40 amp?) with a BXT99RT4A MAX series (same number ?) 470 CCA with higher Reserve capacity. So I feel that with a lot of maintainer time with optimization to help keep bad cell limping along I got by for months with a weak cell. I don't have Ford pass on my phone so never got a deep sleep message and truck never failed to start. Wife has Ford pass on her phone but never said anything about a deep sleep message. The new battery can see 12.6 volt some of the time but mostly at 12.4 but will see 12.1 after 5 days of non use. So apparently have good battery but seldom sees 100% but can with 8+ hours of run time. Need that 2025 first qtr fix!

I think I'm going to stop charging it, turn telemetry on and let it fail fully. Sounds like these just sort of die. Saw another post about this as well. I'll hopefully be able to limp it along until that new software update comes out and get a new one after that and before my warranty expires in Sept 2026.

I just can't believe how crappy the battery is. You'd think with it being plugged in and maintained its entire life it wouldn't have gotten this bad after just 16 months. Truck has 4500 miles on it and is garaged 24/7.

 

[MakinDoForNow]

Charger is good and set to lead acid 12v.



I think I'm going to stop charging it, turn telemetry on and let it fail fully. Sounds like these just sort of die. Saw another post about this as well. I'll hopefully be able to limp it along until that new software update comes out and get a new one after that and before my warranty expires in Sept 2026.

I just can't believe how crappy the battery is. You'd think with it being plugged in and maintained its entire life it wouldn't have gotten this bad after just 16 months. Truck has 4500 miles on it and is garaged 24/7.

Every time it doesn't start call Ford to come start it. Don't jump it and take it to dealer.

 

[colinl]

Every time it doesn't start call Ford to come start it. Don't jump it and take it to dealer.

you have a lot more time to waste than I do.

letting the stock battery fail is a fine idea if the new agm battery will be the warranty replacement. otherwise, getting a battery that works even if you have to pay for it would be my suggestion.

 

[Ray-n-AVL]

I had this happen to me but just charging it in the driveway. I believe the truck was in battery saver mode before I started the charging process. After the battery showed fully charged I checked the app and it showed I was in battery saver mode. We have a circular driveway and I just drove it around. Battery saver mode cleared and I haven't had any issues since.

Sponsored