HYBRID 12V Battery Mystery SOLVED

[HeyBales]

I cannot, I think I need to import some custom PID infos into Torque for that, but I don't know where to get them for the Maverick. Plus the phone I'm using for it is extremely laggy, I do have another unused phone that is newer that would probably work better.

Would be willing to try more data gathering if someone can provide the PIDs.

Under BCM or BdyCM depending on how it calls the module.
Others have mentioned that Torque had them, so perhaps just an update, or it's the 26MY aspect of it.

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[Darryl]

I'd love to know what the resting voltage on those successful trucks is.
And what the Ford self reported SOC% is.
After say 2 and then 4 weeks. Shoot - 2 and 4 months!

Because this thread is proving there is an undercharging strategy that can be defeated when the battery is at least newer and fresher, or all charged up externally.
And has nothing to do with a battery drain that is intermittent and unrecoverable.

I can show you log files from my truck proving that the BMS system believes it has equal amp hours charging and discharging.
There is no heavy drain that isn't met by a heavy charge for a few days or a long drive - I mean 8-10 amps for 10-15 min, then slowly dropping, but not as fast as normal.
And yet despite that - the resting voltage is down at 11.8-12.0 very easily, because at the start it was willing to let it drop.

The problem is Ford is still only chasing intermittent parasitic drains - that's great and needed.
But the number of people on here reporting such is actually very infrequent as you read many posts.
Meaning the battery is dead in a day or two. Or maybe it got mostly drained because the drive the next day interrupted the intermittent part, and it didn't come back to finish the drain.
The number of people on here reporting just a low voltage battery is very frequent.
Their system is willing to live with battery saver on - even without deep sleep mode. So 12.1V or less.
How many more have no issues and totally charged up battery?
Some have reported no battery saver alerts or lights off early. Even with infrequent brief drives. And cold winters. Incredible.
This thread proves there could easily be reasons why some never seem to have a problem.

Also need to distinguish I think between pre-25MY where there is no comment in the manual about battery specs being matched.
But the 25/26 manual does say the same thing the EB section says - use the exact same spec battery, or have a technician update the BMS figures for the battery. Seems Ford made a change there.
That's probably where that AGM option makes a difference. 25/26MY.
Posters have changed that value way back on pre-25MY and reported it made no difference when they got an AGM - still had problems shortly, didn't change the charging strategy.

And no - my dealer won't do the ACCM update unless I come in with drained battery. Waste my time at another dealer with no truck for hopefully only 2 days if they do it - no thanks.
My slowly being killed battery doesn't seem to count.

Sorry if this is coming off harsh - but I keep seeing this disconnect between 2 different problems.
And I'm always posting about someone checking on the ACCM update when they report a drain condition.
But this thread is the first time something has been found to force higher charging to keep a battery from getting undercharged and slowly go bad.
It's not doing that because there was a parasitic drain, just the normal micro-drain.

We will do the update if a customer comes in complaining that his battery has drained in the past. It's no skin off our back. If it's under warranty, Ford simply pays, it's not an issue. So any dealership that refuses to perform the update simply is being difficult for no reason. As for the battery state of charge after x months, I honestly have no idea, I do know that if the state of charge drops below a certain level, it will go into deep sleep. I also have never seen a vehicle that settles at less than 90% Once things stabilize . And that's when I log onto our "Oasis" where connected vehicle status is reported. . And I just know the vehicles have not acted up any more after nearly a year. And it was before Ford changed the replacement to an AGM battery. These vehicles still have the regular enhanced flooded battery. If the vehicle isn't showing any symptoms, that's what matters to the customer

 

[Red Eyes - Wide Shut]

We will do the update if a customer comes in complaining that his battery has drained in the past. It's no skin off our back. If it's under warranty, Ford simply pays, it's not an issue. So any dealership that refuses to perform the update simply is being difficult for no reason. As for the battery state of charge after x months, I honestly have no idea, I do know that if the state of charge drops below a certain level, it will go into deep sleep. I also have never seen a vehicle that settles at less than 90% Once things stabilize . And that's when I log onto our "Oasis" where connected vehicle status is reported. . And I just know the vehicles have not acted up any more after nearly a year. And it was before Ford changed the replacement to an AGM battery. These vehicles still have the regular enhanced flooded battery. If the vehicle isn't showing any symptoms, that's what matters to the customer

The service writers just kept blowing me off and treating it like it was nothing, until I went to the sales and service dept managers. Then they got serious about investigating the problem. So far, the issue seems resolved.

I really am sick of all the theories and excuses for lack of performance. Fix the damn thing, it's been years and many unresolved SSM's.

 

[Packer Bill]

I also have never seen a vehicle that settles at less than 90%

The only time that I see SOC over 90% is when I charge the battery with my NOCO charger (I do have the ECO model). I think many ECO owners have the same issue.

 

[Mavster Mechanic]

The only time that I see SOC over 90% is when I charge the battery with my NOCO charger (I do have the ECO model). I think many ECO owners have the same issue.

So are you going to be the person to run full headlamps (not just DRL) for a month straight in an EcoBoost and see what it does for your battery?

 

[Packer Bill]

So are you going to be the person to run full headlamps (not just DRL) for a month straight in an EcoBoost and see what it does for your battery?

I am considering it....

 

[Jeffs72MGB]

The only time that I see SOC over 90% is when I charge the battery with my NOCO charger (I do have the ECO model). I think many ECO owners have the same issue.

I'm in the same boat with my Ecoboost. Have you set your SOC to 100%?

 

[Mavster Mechanic]

I'm in the same boat with my Ecoboost. Have you set your SOC to 100%?

In the 2022 Hybrid the setting is ignored if your headlamps are on, trailer lamps are on, or fan speed is 6 or 7.

12v battery will charge to 100%.

 

[notfast]

I had a 2012 Honda crv that ate 12v battery in 18-24 months. Could increase life to 36-42 months if drl's and fan speed 3 were set to come on at key on. Then to 60+ months life if noco g5 was put on three times a year. (Crv 12v logic did not start 12v charging until about 15 minutes of operation or when 12v soc was about 11.5 volts).

Other late-model vehicles work in a similar sense. I recently worked on an XA50 RAV4 gasser. Battery hovers at 60-70% SOC and 12.4V while driving around. Turn on the headlights or A/C and battery voltage climbs to 14.1V and SOC hovers around 90%.

On the other hand, the vehicle has a relatively massive H6 AGM battery, probably in part due to the auto start stop.

 

[HeyBales]

Other late-model vehicles work in a similar sense. I recently worked on an XA50 RAV4 gasser. Battery hovers at 60-70% SOC and 12.4V while driving around. Turn on the headlights or A/C and battery voltage climbs to 14.1V and SOC hovers around 90%.

On the other hand, the vehicle has a relatively massive H6 AGM battery, probably in part due to the auto start stop.

Interesting.

I recall seeing some videos for mid/late 2000's different makes/models where they started doing clutch alternators being disengaged at startup, and some until engine/exhaust sensors were warmed up.
Then they'd engage either for time or a voltage reading - and then start duty cycling for less current to battery and less power from engine. Do the same thing for engine loads over some limit.

I wondered how fast did that clutch go out, on what was likely a more expensive alternator.
Several of the videos happened to be on the PCM being an issue to charging, as it controlled it, and it went flakey.
So now an expensive PCM replacement was required - with programming needed to work.
Ugh.

And I thought older years of blowing an alternator IC due to bad battery was annoying and expensive, not looking forward to the newer stuff. I guess back then I likely could have taken the alternator apart, maybe just got the new IC. But needed quick and rebuilts were decent!

 

[Hcopter]

I picked up this trailer plug tester today to see if it would be enough to trigger the higher voltage, but it didn't. The truck doesn't acknowledge that anything is plugged in to the trailer port even though the little LEDs are lit.

 

[Mavster Mechanic]

I picked up this trailer plug tester today to see if it would be enough to trigger the higher voltage, but it didn't. The truck doesn't acknowledge that anything is plugged in to the trailer port even though the little LEDs are lit.

Good idea though.
Mine has 12 LED and the truck thinks it's a trailer.

 

[Red Eyes - Wide Shut]

Good idea though.
Mine has 12 LED and the truck thinks it's a trailer.

Seems like a lot to do to simply keep the battery properly charged.

 

[dadd75]

I have a '22 Lariat Hybrid with less than 13K miles on it, I'm retired. It is constantly in deep sleep mode. The dealership's answer to my 'why' is to drive it more. It has always started, just no interior dome light or 'touch' passenger door handle to unlock. I have read this entire thread and it seems the problem is still unsolvable? I thought of getting an AGM battery and set the ForScan to 90% charge, which some say works, but others say it does not last. Just wishing for an answer.

 

[samspritzer]

I have a '22 Lariat Hybrid with less than 13K miles on it, I'm retired. It is constantly in deep sleep mode. The dealership's answer to my 'why' is to drive it more. It has always started, just no interior dome light or 'touch' passenger door handle to unlock. I have read this entire thread and it seems the problem is still unsolvable? I thought of getting an AGM battery and set the ForScan to 90% charge, which some say works, but others say it does not last. Just wishing for an answer.

I am in the same boat as you. As long as it starts, I can live with the inconvenience of no dome lights. I always unlock from the driver's side

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