Changing to AGM

[Random]

H4 was harder to find before so many went with H5. I chose that to have more CCAs.

Definitely is an issue with the BMS and BCS. Ford knows but hasn’t admitted it publicly.

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[JimInWI]

H4 was harder to find before so many went with H5. I chose that to have more CCAs.

Leads to the question, are CCAs that critical in my hybrid? I am guessing CCAs are an approximation of capacity of the battery. Since the hybrid “shouldn’t“ need to “crank” the starter, the larger battery should only really provide for more capacity for the mysterious things that happen after shutdown, correct?

 

[Random]

Leads to the question, are CCAs that critical in my hybrid? I am guessing CCAs are an approximation of capacity of the battery. Since the hybrid “shouldn’t“ need to “crank” the starter, the larger battery should only really provide for more capacity for the mysterious things that happen after shutdown, correct?

No idea my dude. Not my area of expertise.

 

[mav47]

Leads to the question, are CCAs that critical in my hybrid? I am guessing CCAs are an approximation of capacity of the battery. Since the hybrid “shouldn’t“ need to “crank” the starter, the larger battery should only really provide for more capacity for the mysterious things that happen after shutdown, correct?

@JimInWI

The Hybrid technically doesn't care about CCA (cold cranking amps) as that is really only important for the Ecoboost models with a starter motor that is powered from the 12V battery.

For the Hybrid you really only care about RC (Reserve Capacity) as the systems onboard (key fob receiver, Fordpass cellular connection, etc.) draw a good amount of power when the truck is parked. The more RC, the longer the battery will last before you get a Deep Sleep which turns some of these systems off to save battery power.

Here's a link specific to the Hybrid:

https://www.mavericktruckclub.com/f...t-is-2024-mav-lariat-hybrid.53345/post-911171

For the Hybrid: Group 140R AGM (H4) drops right in, without modifications.

H5 is too large: it can be made to fit but supposedly you need to cut some brackets under the seat. I didn't like that idea even though an H5 offers a bit more RC capacity than the H4 Group 140R AGM.

I put in an H4 / Group 140R AGM 16k miles ago, and the random deep sleeps are completely gone. Zero issues. Charging works as expected. And there's no need to make modifications in Forscan, it works fine with the stock settings.

Cheers!

 

[JimInWI]

@mav47

Wow! What a great explanation. Thanks for taking the time to give me clear understanding.

Helps greatly with the purchase I’m going to make in a month or so.

Did you fully charge the battery and condition it before installing?

 

[Bear]

So, this AGM battery you installed was just a swap and no programming changes or modification are required right?

When I brought in my truck for that rodent repair it sat for 3 weeks and when I got my Maverick back I started getting the deep sleep message again. When they get a fix for the rear camera recall I will bring this up when I bring it in and see what they say about it.

@JimInWI

The Hybrid technically doesn't care about CCA (cold cranking amps) as that is really only important for the Ecoboost models with a starter motor that is powered from the 12V battery.

For the Hybrid you really only care about RC (Reserve Capacity) as the systems onboard (key fob receiver, Fordpass cellular connection, etc.) draw a good amount of power when the truck is parked. The more RC, the longer the battery will last before you get a Deep Sleep which turns some of these systems off to save battery power.

Here's a link specific to the Hybrid:

https://www.mavericktruckclub.com/f...t-is-2024-mav-lariat-hybrid.53345/post-911171

For the Hybrid: Group 140R AGM (H4) drops right in, without modifications.

H5 is too large: it can be made to fit but supposedly you need to cut some brackets under the seat. I didn't like that idea even though an H5 offers a bit more RC capacity than the H4 Group 140R AGM.

I put in an H4 / Group 140R AGM 16k miles ago, and the random deep sleeps are completely gone. Zero issues. Charging works as expected. And there's no need to make modifications in Forscan, it works fine with the stock settings.

Cheers!

 

[mav47]

@JimInWI
@Bear

I charged the new AGM battery to full on the workbench, and then installed it into the truck.

Then I reset the BMS:

1. Turn key on (or push start button) WITHOUT your foot holding down the brake. So you're in ACC mode.
2. Flash high beam headlights 5 times. (Usually pull back on signal light lever)
3. Hit brakes 3 times
4. Watch for battery light to start flashing

This tell the truck that a new battery is installed, and starts a new day counter for said battery so you (in Forscan) or a Ford Service Tech can see how old your battery is sometime down the road.

@Bear mentioned parking the truck for three weeks. Do note that it is normal for the truck at some time to go into Deep Sleep (once!) when you put it away for longer periods, as that's exactly what the feature is for.

Not normal were the seemingly random and frequent deep sleeps I got with the stock FLA battery, sometimes right after driving it for 40 miles. The new AGM battery fixed all that.

No Forscan tweaks are needed in my opinion. I have not seen any performance difference with or without changes to the battery charge level. Either way the system works fine with the new AGM battery.

Don't overthink all this: just put an AGM battery in there and forget about it!

Cheers!

 

[BlueSpec1]

All these abbreviations really get me, what the hell is BCM? For us older folks...

Some acronyms/abbreviations listed spread thruout Ford manuals.
Livnitup's forscan spreadsheet has some listed:
https://www.f150gen14.com/forum/threads/2021-f-150-forscan-list-database-spreadsheet.1578/

Charging System - 2.5L Duratec – Hybrid (121kW/164PS) (S3) - System Operation and Component Description

12V Battery Charging System

The 12V battery is charged by the DC / DC converter control module.
The BMS continuously monitors the battery state of charge condition and provides the BCM with this information.

Battery Charging System Component Description:

BMS - Battery Monitoring Sensor-
The battery monitoring sensor measures voltage, current and temperature of the battery and uses these inputs to calculate the battery condition, transmitting this information through the LIN circuit to the BCM

BCM - Body Control Module-
The BCM communicates on the HS-CAN1, determines the ignition state, communicates the power mode state and measures the 12-volt battery voltage with the battery sensor.

PCM - Powertrain Control Module-
The PCM communicates on the HS-CAN1 and determines the ambient air temperature, enables and sets the low voltage charging setpoint, determines power pack status and transaxle gear state.

DCDC - DC/DC Converter-
The DCDC is responsible for maintaining and charging the 12-volt battery, it communicates on the HS-CAN1.

 

[Dmat]

Thought Id add some photos of the panels and parts while swapping the battery. this evening. I got a few extra connectors because of my subwoofer but it all fit in there easily. Gotta reset the bms and check to make sure the truck thinks I've got an AGM battery now

 

[CurtisB]

I just read this. I am thinking about replacing my stock 12v battery in my 2023 Maverick lariat hybrid with a AC Delco AGM that should fit but when I go to sites and plug in my vehicle specs, it never comes up with an AGM. If I put one in will it void my warranty?

I'm not an expert on whether this will void a warranty. But, if it solves the problem and the battery you replace lasts 3 or more years, I don't think a warranty would be of any concern.

 

[Feldgary53]

I too have been getting frequent deep sleep alerts on FordPass and plan to swap to the H4 AGM but I have never had an issue with starting the truck. After the last two alerts I checked voltage at the battery and it showed 12.4v each time. My truck has never sat more than 4-5 days without use and Ford states the deep sleep should only occur after 14 consecutive days of non use, battery at or below 9.5 volts or BCM 12v battery SOC drops below 50%. I recently saw a service campaign listed that mentions false deep sleep alerts on various Fords including the Maverick.
Mine was recently at the dealer for routine maintenance and the wiper recall so asked them to investigate the deep sleep issue and after updating modules and fully charging the battery to test it they gave it a clean bill of health. Unfortunately after they returned it to me I got the dreaded alert a half hour later!
Apparently nobody at Ford has a clue or isn’t communicating with dealerships on how to cure the problem leaving it up to us to do it.

 

[OneAlienBoi]

Don't overthink it: just put any AGM battery in there, reset the BMS and call it good.

You'll find that random low battery voltage conditions & deep sleeps go away.

This is the battery I put in: UPlus AGM Group 140R, drops right in. Zero issues since installing it 15k miles ago.

Cheers!

Can't wait to try this. Thanks for the feedback. This is a weird question, but does it really matter that order you get the BMS recall done and a new battery out in? I know, dumb question, but I'm curious.

Like is it better to do the recall, then get a new battery, or battery and then recall? Or does it not make a difference?

 

[OneAlienBoi]

H4 was harder to find before so many went with H5. I chose that to have more CCAs.

Definitely is an issue with the BMS and BCS. Ford knows but hasn’t admitted it publicly.

From what I can ascertain, the BMS in the maverick has been improved drastically with these newer software updates, that's what I'm hearing anyway. But swapping the battery out for a more robust option seems like a good choice on top of that just to permanently ensure there are no deep sleep issues moving forward.

 

[OneAlienBoi]

This has probably already been answered in the forum somewhere, but does swapping out the 12v batt yourself versus the dealership doing it for you, void any warranties?

I'm probably gonna pay a dealership to do it. We'll see if the stock '22 hybrid battery can make it through a third winter. If it can't, I'm gonna swap in one of these batteries.

It doesn't seem super complex, but I trust a dealer tech more than I trust myself, even simple things with modern cars can screw things up if you don't know what you're doing, and I most certainly do not when it comes to this sort of thing. I don't see it voiding the warranty if the dealer installs it, but I'd ask them.

 

[PlantMan]

Another handy option is installing a BM2 bluetooth battery monitor right across the battery terminals. They're only around $26 and let's you know what the battery's SOC is and the app keeps a history of battery voltage.

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