FINALLY!! An upcoming 12v battery fix for hybrids!!!

[EffNo50]

Ford should have used an AGM battery as the stock battery on the Hybrid instead of a wet cell. Point 1 who in their right mind would put a wet cell battery under the back seat inside a car????? Yes the stock Hybrid battery is vented under the floor, but a really bad decision. The AGM battery will not out gas, and it is non-spillable. Point 2 is that the AGM (H4, 140R) battery has 50% more cold cranking amps as the wet cell OEM battery. Point 3 is that the AGM battery discharges at about 1/3 the rate as the OEM wet cell. Lastly, the software "fix" will be a tweak on charging of the 12v battery and probably to reduce functions that discharge the battery. Getting an AGM battery improves performance and safety, and that coupled with the "to be" software fix should put this issue to bed.

I agree they should be AGM, but the Hybrid needs RC, not CCA. The High voltage battery starts the hybrid ICE.

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[Cuban Al]

So, I took a 1 hour drive yesterday, 12 volt battery started the trip at 46% SOC and ended at 47% SOC! It always shows the 12 v battery at 15.1 volts, which should mean it is charging?! I have a pdf of the service manual, maybe I can find a theory of operation on the BMS…….I have had no issues thus far, but the 12 SOC is a growing concern to me……. Bill P

Does the DCLVA & 12v battery PID s mean the battery should be charging at 256.7 watts?! P=IxE……….. BILL P

How do you get that readout info. I keep having deep sleep and is costing Ford a lot of road service jumps. I talk with Ford and they told me there is no way to check the voltage other tham physically with my volt meter. I am sorry I bought this unreliable 2024 hybrid with all the bs electronic crap I dont need or want. I take it to the dealer do something to the battery and tell me everything is cool and in a couple days is deep sleep again and call road assistance.

 

[Packer Bill]

How do you get that readout info. I keep having deep sleep and is costing Ford a lot of road service jumps. I talk with Ford and they told me there is no way to check the voltage other tham physically with my volt meter. I am sorry I bought this unreliable 2024 hybrid with all the bs electronic crap I dont need or want. I take it to the dealer do something to the battery and tell me everything is cool and in a couple days is deep sleep again and call road assistance.

Your dealer, like many dealers, is not fully informed on the Maverick battery issues. Your dealer should be aware of the upcoming software fix and the current Hybrid battery is not adequate. With the MY 25 hybrids, Ford finally put in an AGM battery. Perhaps another Ford dealer will be more helpful...

 

[carcrasher89]

Carscanner app now works with CarPlay! Bill P

Can you share link to app and what odb2 scanner did you get?

 

[HeyBales]

So, I took a 1 hour drive yesterday, 12 volt battery started the trip at 46% SOC and ended at 47% SOC! It always shows the 12 v battery at 15.1 volts, which should mean it is charging?! I have a pdf of the service manual, maybe I can find a theory of operation on the BMS…….I have had no issues thus far, but the 12 SOC is a growing concern to me……. Bill P

Does the DCLVA & 12v battery PID s mean the battery should be charging at 256.7 watts?! P=IxE……….. BILL P

BMS - Battery Monitoring Sensor for Ford.
It's merely reporting to probably the BCM that controls the DCDC Conv and the actual battery management system perhaps in the BECM?
From youtube videos on other Ford's - it appears the same sensor type and it's stated as such, purely a reader for at least Amp, perhaps Volts.

1 Amp charge.

And if that's a roundoff figure, could be slightly above 0.5.

So how long does a trickle charger putting out 1A take to top off a battery, 12 or 15V doesn't matter, just 1A?

If you observe that when you 1st start driving, do you actually see upwards of 10A for a time?
And then it dropping?

 

[HeyBales]

Ford contacts your truck once/day for about half a second. That's a very, very small loss of power. Leave the fuse in and stop worrying about it. Instead, you have a sulphated battery that needs to be replaced.

Once a day?
Is there a reference to that?
4G and a days worth of data if indeed once a day? - more than half a second then with modem on.

Perhaps if you disabled the "Connected Vehicle" option so system knew no chance of remote start/unlock was possible, I could see it reporting to Ford once a day, would need the other options disabled too though.
But even though I could see once a day being fine if no connectivity for driver - that doesn't mean Ford would hold itself back - hence wondering about reference for that.

 

[HeyBales]

So, I took a 1 hour drive yesterday, 12 volt battery started the trip at 46% SOC and ended at 47% SOC! It always shows the 12 v battery at 15.1 volts, which should mean it is charging?! I have a pdf of the service manual, maybe I can find a theory of operation on the BMS…….I have had no issues thus far, but the 12 SOC is a growing concern to me……. Bill P

Does the DCLVA & 12v battery PID s mean the battery should be charging at 256.7 watts?! P=IxE……….. BILL P

The 12 V system is getting 17A, the battery is getting 1A (or rounded up from <1) @ 15.1 V.
15.1 W.

At less than 50% SOC you should be getting deep sleep warnings, unless it rises slowly on turn-off.
SOC is very inaccurate measurement while charge/discharge is going on.
Not sure how long system takes to decide "oh yeah this is low turning off TCU after sending out notice to Ford".

How's ATT network in areas where truck sits?

 

[HeyBales]

Sorry, remind me of what the TCU in that service ticket is?
Bob

Telematics Control Unit.

The modem that connects to ATT network.
Guessing it may have the WiFi radio in it. Though that could be with the radio, since that's the system it would update if enabled and there was an update.
(I guess someone that pulled fuse 11 should test if WiFi can connect... )

It's the TCU that is disabled for deep sleep mode.

Other items start to be disabled or shortened for on time in battery saver mode, which should proceed deep sleep by some days.

 

[HeyBales]

I have posted this work order elsewhere, performed on my 23 hybrid. It's been a while since I went into deep sleep. It's could be the fix or it was an isolated issue. They had my rig for 26 days, were in contact with Ford and they gave me a Mach-e as loner, so much fun driving that. Maybe it will help those of you who fully understand what it's saying.

I love this example of testing and other descriptions.
Perhaps some are briefer than reality - but I do wonder about a couple.

"Installed a new battery to see if old battery was unable to hold a charge."
prior "tested vehicle battery, good battery."
They sure better have a battery tester that should be able to give a read on this tidbit.
But it appears they don't trust it? Or it's actually not a good initial test?
A simple load test usually proves this out, battery doesn't recover the way it should.
Or a volt read over short time proves it.
Pretty sure so many getting bad battery @ 39% (or whatever) when taken in are getting this test and it works right.


"Charged battery to 87% and reset the BMS ... and parked vehicle."
The BMS reset is supposed to be done on a new fully charged battery.
Did the parking including locking the doors - which is a required step in the required 8 hr relearn when a new/charged battery is connected?

It was a good example that a good TCU while operating as expected does not parasitic drain the battery - it obviously has a micro-drain within specs.
(frankly THIS is what I think the software upgrade will do in 1Q, take care of unusual issues - not the current charging method, but hope I'm wrong)

It's also interesting that Ford's recommended procedure for tracking down parasitic draw isn't probing the fuses or lines, but flat out unplugging modules.
Many times when a module is plugged back in, the act of receiving power again causes actions to happen that now kill the whole parasitic draw process for the next module being tested. Since you have to wait for hours to confirm all activity is done. Would have been nice to see the manual comment on what the hybrid wait time is for that.
So it's good to know this - since attempting normal method with the underhood fuse box is impossible, which has many modules straight from it.
ACM, APIM, IPC, RCM as a group it appears, and then TCU on it's own.
(Audio Control, Accessory Protocol Interface, Instrument Panel Control, Restraint Control) I'm guessing those are modules more prone to false sensor reads and performing actions that drain quickly.

If the new SSM regarding drained batteries had come out prior to this work order - would they have just said "oh known issue, wait until Jan"?
Or would they have done the work anyway?

ETA: added APIM module name.

 

[HeyBales]

Lastly, the software "fix" will be a tweak on charging of the 12v battery and probably to reduce functions that discharge the battery. Getting an AGM battery improves performance and safety, and that coupled with the "to be" software fix should put this issue to bed.

Curious where you got your info on what the fix is doing to know it's a tweak on charging?

The SSM regarding intermittent battery drain issue doesn't state what is being done exactly - just wondering if more info out there from reliable source, or are rumors just abounding on what is being done because folks want hope?

 

[billpitman]

Can you share link to app and what odb2 scanner did you get?

https://apps.apple.com/us/app/car-scanner-elm-obd2/id1259933623
OBDLink MX+ dongle, expensive but safe, & can leave plugged in…… Bill P

 

[billpitman]

BMS - Battery Monitoring Sensor for Ford.
It's merely reporting to probably the BCM that controls the DCDC Conv and the actual battery management system perhaps in the BECM?
From youtube videos on other Ford's - it appears the same sensor type and it's stated as such, purely a reader for at least Amp, perhaps Volts.

1 Amp charge.

And if that's a roundoff figure, could be slightly above 0.5.

So how long does a trickle charger putting out 1A take to top off a battery, 12 or 15V doesn't matter, just 1A?

If you observe that when you 1st start driving, do you actually see upwards of 10A for a time?
And then it dropping?

Never see a high charging current ie: 10 amps……, but turn vehicle off & big
- amp draw, 10-15 amps….. Again, I have had NO issues so far! Bill P

Also, ATT coverage is like 2 bars….

 

[MakinDoForNow]

BMS - Battery Monitoring Sensor for Ford.
It's merely reporting to probably the BCM that controls the DCDC Conv and the actual battery management system perhaps in the BECM?
From youtube videos on other Ford's - it appears the same sensor type and it's stated as such, purely a reader for at least Amp, perhaps Volts.

1 Amp charge.

And if that's a roundoff figure, could be slightly above 0.5.

So how long does a trickle charger putting out 1A take to top off a battery, 12 or 15V doesn't matter, just 1A?

If you observe that when you 1st start driving, do you actually see upwards of 10A for a time?
And then it dropping?

Someone posted that a 1 amp trickle was inadequate due to having to furnish and make up for the random draws. He recommended a 4 amp multistage maintainer. The maintainer will most likely drop to 2 amp at 80% soc reducing lower at 90-95% etc.

 

[Master Blaster]

Once a day?
Is there a reference to that?
4G and a days worth of data if indeed once a day? - more than half a second then with modem on.

Perhaps if you disabled the "Connected Vehicle" option so system knew no chance of remote start/unlock was possible, I could see it reporting to Ford once a day, would need the other options disabled too though.
But even though I could see once a day being fine if no connectivity for driver - that doesn't mean Ford would hold itself back - hence wondering about reference for that.

Almost all the time its a very quick traffic blip, just to check if there are updates to your Sync system. If there is an update it would be somewhat larger once every half year or so when Blackberry releases a new version. Obviously if you are using the modem to connect because your truck not connected to your house WiFi overnight, then it will take slightly longer. I'm not sure how long, since we don't have AT&T in Canada and therefore have absolutely no use for the modem option. I presume that your AT&T website would have a chart or table showing the traffic and the time that you can look at.

 

[HeyBales]

Never see a high charging current ie: 10 amps……, but turn vehicle off & big
- amp draw, 10-15 amps….. Again, I have had NO issues so far! Bill P

Also, ATT coverage is like 2 bars….

So the LvbA line will go to neg 10-15 A when you turn truck off? (foot on brake? 7A for brake lights, overhead lights on, few there, ect.)
(notice it's positive 1A in your pic - battery is receiving a charge)

Interesting - mine goes to neg 5A with foot off brake and other things besides radio have turned off.

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