Maverick Died, save... but wtf.

[HeyBales]

Oh nice.

So at least on that log - that would appear normal usage.
(I'm betting 18:40 would have shown another dip)

You have above 12.1 V if that is what the truck's system is reading. Of course nothing is based on reading after a charge, as invalid level. But the drive must have started decently high.
So no battery saver turning lights off early to reduce drain.
So maybe 20 min higher draw, relay engaged and more stuff turns off, and back up to nice level.
Sadly not as nice as it was prior, but again, invalid reading.

So the intermittent battery drain being blamed on the AC unit - does not appear to be hitting you that night at least.
Several posts prior to the SSM giving that module as the culprit - drivers were noticing that their normal process of leaving the system on - they noticed fans running for hours afterwards.
That would show up in your graph.
And they noticed if HVAC turned off (undesired in big cold or hot times), that didn't happen.

Since that appears good levels - but you got hit 1 night and next morning very bad levels - that sounds like parasitic drain.
You may want to get in habit of turning HVAC off before shutdown for night, or errands for that matter. Just in case that is the reason.

Despite many recommendations to get AC module updated - maybe other dealers are like mine - you don't appear to have an issue, we aren't doing that for free.
Not sure what level you'd need to reach to show you have an issue. And may not even be that one!

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[Cancunbadlands]

Follow up

 

[Andrew-25Mav]

So, even with the battery replaced. Yesterday, it happened again, slightly different start, after a short drive (3km) went into the store for 10 minutes, came out started the truck, started driving and got the alert stop as soon as possible. I noticed that the gas engine wasn't running and it was on electric. Stopped, parked, turned off, turned on, was fine.

Got home (3km) was in the house for 20 minutes, went out to leave, start the truck, Christmas tree time, all alerts it could give it did. Tried a second time, same thing.

Disconnected the negative terminal, 10 seconds reconnected, started, all fine.

I'm still seeing the new battery at low voltages. The day before I was out for a 45 minute drive, it should have been fully charged but it wasn't, voltage yesterday was down to 11.5 when it was failing.

(more of a rant than a please help me fix my truck, i'm going to call the dealer).

Ok, first thanks to all contributing interesting information, seems there are likely multiple possible issues to the Maverick's battery drain issues that people have been experiencing.

Update on the dealer call today. They at this point won't look at the truck. As I've reset the computer by disconnecting the battery, I've cleared any issues for diagnosis. So they have requested the next time it happens to, not resolve the issue, but have it towed (Ford's roadside assistance) to the dealership. This is well a mighty pain in the ass but I on one hand know where they are coming from. I now wish I hadn't disconnected the negative on Sunday, as it was in my driveway, the best place to get it towed from... the next time could be at any random place and random time and I'll have to make the call then.

Stay tuned!

 

[Andrew-25Mav]

Oh nice.

So at least on that log - that would appear normal usage.
(I'm betting 18:40 would have shown another dip)

You have above 12.1 V if that is what the truck's system is reading. Of course nothing is based on reading after a charge, as invalid level. But the drive must have started decently high.
So no battery saver turning lights off early to reduce drain.
So maybe 20 min higher draw, relay engaged and more stuff turns off, and back up to nice level.
Sadly not as nice as it was prior, but again, invalid reading.

So the intermittent battery drain being blamed on the AC unit - does not appear to be hitting you that night at least.
Several posts prior to the SSM giving that module as the culprit - drivers were noticing that their normal process of leaving the system on - they noticed fans running for hours afterwards.
That would show up in your graph.
And they noticed if HVAC turned off (undesired in big cold or hot times), that didn't happen.

Since that appears good levels - but you got hit 1 night and next morning very bad levels - that sounds like parasitic drain.
You may want to get in habit of turning HVAC off before shutdown for night, or errands for that matter. Just in case that is the reason.

Despite many recommendations to get AC module updated - maybe other dealers are like mine - you don't appear to have an issue, we aren't doing that for free.
Not sure what level you'd need to reach to show you have an issue. And may not even be that one!

Well, I've got the data, so I'll show you what is going on, i've graphed 12pm EST yesterday to now (4:47pm EST today). Those two dips were the only dips the truck has done. Temperature today at 5am was -25c and it's -6c now so doesn't appear to be influced much if any by temperture. I just checked the app, i'm in battery saver mode, I never got an alert to that effect, but says it is. At this voltage I wouldn't think it should be, but likely explains the lack of dips since the last one.

The do-dad that measures the voltage measure's it 32 times with 200mS delays and averages for a single output for the time period (which I believe is 15 seconds). And it has a plus to negative resistance of 37.5k ohms so at 15 volts only draws 0.004 milliwatts and it has it's own battery system to power the unit. So no appreciable drain on the battery.

 

[Timothyd]

Made an appointment with the dealership, she goes in wednesday. I don't expect much, but we'll see.

Be sure to look over their shoulders and get all the details you can. Hold their feet to the fire and get a good explanation. Keep us posted.

 

[HeyBales]

That is interesting for voltage that high and still be in DSM, or battery saver for that matter.

Since it's a lot easier to hit 40% Ford special SOC or below and have DSM enabled, compared to hitting below 9.5V - I can see that happening.

Ford SOC is cumulative counting - with an adjustment every once in awhile after a BMS relearn has occurred automatically - if car locked for almost 9 hrs.
I thought mine was doing great at reaching 65% one warm day.
The next day it had been adjusted down to 53 or below%. Which made more sense for the resting Voltage it was at.
Not a drain either - the sleep mode draw was abouts 50 mA avg the entire time, not enough to drain that much.

So maybe you have a current SOC looking really poor, effecting DSM enabled, but it needs to adjust up to where the voltage indicates it's really at.
I still think you had a drain one night - maybe that's where a low SOC% came from.

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