12V Battery Recharge Threshold Improved in Latest BCM Software!

[Shayne]

I'm gonna pick up a new battery and change it out myself. I got the trickle charger and didn't leave it on long enough, it's recommended to leave it on for 24-48 hours, I didn't and it's my fault. It's a 2 amp automatic charger.

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[Mike G]

No. On many levels...No.

 

[Shayne]

My mme has a trickle charger on the 12v battery, it's wont do a thing. It died last week in -35 temps, thats why I have the charger on it. I dont know what else to do other than wait for the dealership to pick it up.

I tried a 4 amp early on. The 4 amp was a smart one and what happened was the MME would draw current and the 4 amp would trip indicating a problem with the vehicle. Phantom drain. I switched to a new 15 amp and have had much better luck.

If you are going to do updates in FDRS you need a massive charger >15amp hooked up for more $. Kind of points at the 12V having a hard time. With it at 55% now it should be no probs ?‍. Really not that expense or a huge problem but would be nice to save the batteries. Get an update notice just hook up the 15 amp is what I am thinking. Fits in the frunk.

No. On many levels...No.

Like an onion it has layers? Please elaborate. Recommended procedure please.

 

[Mike G]

Like an onion it has layers? Please elaborate. Recommended procedure please.

Well, I get that she's trying to be helpful...but going to Walmart to buy a battery for a MME is ridiculous. The charging system in the MME is setup for a specific battery type and capacity. Not a plain-jane flooded battery that just happens to be a close fit size-wise. AGM batteries have specific charging parameters. And let's say you wanted to put the DieHard in there that's got a little more amps...the car charging system isn't set for that either. So is it gonna charge properly or are you just going to end up with a different set of problems with a bigger capacity battery that isn't fully being recharged?

This is the primary reason I haven't just put the larger capacity DieHard in my car or truck...because the capacity parameters are different than what the car and truck's charging systems are expecting. Yeah, initially it may drain down a little slower due to having a greater AH capacity, but is it ever going to get fully recharged by the car's charging system when in daily use?

 

[dtbaker61]

Find someone near you who has an FDRS rig? ?‍?

I can probably get my Dealership to do it, but I need to know the exact update version of BCM to ask for, and verify that it would be compatible with all the remaining module versions which have not been updated in a long time.

 

[Addos]

Why are we having to come to forums not ran by Ford to get this kind of information? Why don't they have an official blog posting about this kind of stuff. I appreciate knowing but it really should be coming directly from Ford through officially vetted channels.

 

[mkhuffman]

Why don't they have an official blog posting about this kind of stuff.

Lawyers.

 

[moog]

Why are we having to come to forums not ran by Ford to get this kind of information? Why don't they have an official blog posting about this kind of stuff. I appreciate knowing but it really should be coming directly from Ford through officially vetted channels.

"Liability" may be some of the reasons.

The others are that they are a legacy vehicle manufacturer, now transitioning to the software maker/game. This near novel for them, and they are figuring it all out as they go.

Legacy makes better get hip with it VERY fast. The future for them is data and software.
It's what is really going to separate the good makes from the bad ones.

 

[txaggies07]

No. On many levels...No.

That video is actually the best way to do the change. There is no need to pull the frunk tub out. The main issue with the video is the battery recommendation. If you buy the oem ford battery and then use the video as an install guide it is quite good.

 

[Maui]

That video is actually the best way to do the change. There is no need to pull the frunk tub out. The main issue with the video is the battery recommendation. If you buy the oem ford battery and then use the video as an install guide it is quite good.

I think if I ever pull those "vanity" panels, or whatever they are called, I would just leave them removed. It's the engine bay... I have no issue with it looking like every car has ever looked.

 

[Snakebitten]

Takes mere seconds to get the trim panels off, or to put them on.

There's no reason to not allow them to be what they are. Dress the hood up looks, as well as a nice dirt barrier to the components underneath.

 

[LRinker1]

I’m pleased to report that the threshold for automatic 12V recharge has been increased to 55% in the latest BCM software! This is a much-awaited improvement that will ensure the battery remains charged, healthy, and prevents it from running low or freezing in extremely cold conditions.

The original software had a threshold as low as 35%, while later versions gradually increased it to 40%, 45%, and now 55%, which is the ideal threshold.

If you’re unaware, the Mach-E automatically recharges the 12V battery when it reaches a low percentage to prevent it from dying. However, the percentage at which this automatic recharge occurs has changed in subsequent software updates.

No idea if or when it's coming OTA.

From what I've read recently on this and other forums, us '21 owners aren't getting updates anymore....so how are we supposed to experience this and other improvements.

 

[Snakebitten]

From what I've read recently on this and other forums, us '21 owners aren't getting updates anymore....so how are we supposed to experience this and other improvements.

There's several threads now with reports of 2021's receiving updates. Bluecruise 1.3 even.

 

[SteveMach-ee]

From what I've read recently on this and other forums, us '21 owners aren't getting updates anymore....so how are we supposed to experience this and other improvements.

My 2021 job 2 received three OTAs in the last two weeks. Definitely hoping for this one.

 

[mkhuffman]

From what I've read recently on this and other forums, us '21 owners aren't getting updates anymore....so how are we supposed to experience this and other improvements.

That's not accurate. The reports you have read are false. 21s are getting updates.

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