Marlin's Dead Low Voltage Battery (LVB) -- Followed by Stuck in Park

dtbaker61

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Great information, Dan, thanks! I saw a photo of 12V socket voltage well over 15V, but that may not have been reading the voltage being supplied to the battery itself, which is probably regulated separately after the DC-DC bus.
I suspect a voltage regulator, voltage sensor and temp sensor are buried in the LBV battery connector right on the terminal. This would limit the current going into the LVB, and let the rest pass thru to the 'rest of the car' at a higher voltage at the most current the dc-dc can supply when the car is up and running and powering 'all the 12v stuff' directly with the dc-dc and recharging the LVB on the fly.

A socket/port will likely only show the actual voltage of the LVB when the car (and dc-dc) is OFF and the LVB is powering the 12v accessories. when car is ON, a socket/port probably shows the direct dc-dc output voltage.
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dtbaker61

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According to the service manual it is variable.
yes the charge voltage SHOULD be variable, with temperature compensation
 
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ChasingCoral

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I suspect a voltage regulator, voltage sensor and temp sensor are buried in the LBV battery connector right on the terminal. This would limit the current going into the LVB, and let the rest pass thru to the 'rest of the car' at a higher voltage at the most current the dc-dc can supply when the car is up and running and powering 'all the 12v stuff' directly with the dc-dc and recharging the LVB on the fly.

A socket/port will likely only show the actual voltage of the LVB when the car (and dc-dc) is OFF and the LVB is powering the 12v accessories. when car is ON, a socket/port probably shows the direct dc-dc output voltage.
Yes there is a battery monitoring sensor clamped directly to the negative terminal of the battery and is an integral part of the battery cable.
 

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Thanks Coral for all you have endured and helped with the issue(s). You are a patient person for sure.

Hopefully when things are figured out we will all be good with zero worries.

When you get your car back the mexican (and beer) is on me.

Thanks

BK2EV
Since @ChasingCoral (Mark) was part of the cast that made the movie Chasing Coral (search for numerous posts providing free links to this great documentary), I decided to show my appreciation for his efforts and dedication toward helping us all, and not just with the Mach-E! I made a contribution in his honor to "Dr. Ruth D. Gates Memorial Student Support Fund (12911204)". She was a lead scientist for the movie and in her life, advancing the understanding of some of the terribly serious effects of ocean warming. “We have lost 50 percent of the world’s coral reefs in the last three decades. If we do nothing, more than 90% of coral reefs will die by 2050.” – Dr. Ruth Gates

There are other worthy charities associated with Chasing Coral, if any others are so inclined to show similar appreciation to Mark and to the future.
 


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ChasingCoral

ChasingCoral

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Since @ChasingCoral (Mark) was part of the cast that made the movie Chasing Coral (search for numerous posts providing free links to this great documentary), I decided to show my appreciation for his efforts and dedication toward helping us all, and not just with the Mach-E! I made a contribution in his honor to "Dr. Ruth D. Gates Memorial Student Support Fund (12911204)". She was a lead scientist for the movie and in her life, advancing the understanding of some of the terribly serious effects of ocean warming. “We have lost 50 percent of the world’s coral reefs in the last three decades. If we do nothing, more than 90% of coral reefs will die by 2050.” – Dr. Ruth Gates

There are other worthy charities associated with Chasing Coral, if any others are so inclined to show similar appreciation to Mark and to the future.
I'm truly honored. Thank you for that sincere act of gratitude.

Dr. Ruth Gates was a prominent part of the film and was conducting pioneering work to learn how to help corals adapt to climate change. Shortly after the film was released she learned she had brain cancer and fought it admirably. She died less than a year later due to complications during an unrelated surgery. All of us in the coral reef community miss her and are thrilled her work is continuing.
 

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I just wanted to thank Mark and others who have been posting about the LVB issues. My car arrived at the dealer a couple days ago; I relayed what I had learned here to my dealer and asked them to check the car carefully for this issue before I took delivery. It was new info to them; they got in touch with Ford techs, did some tests, found that fault in my car, and updated the software. sorry, I didn’t get more precise details than that! We picked up the car today and are very happy with it so far.
 

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I just wanted to thank Mark and others who have been posting about the LVB issues. My car arrived at the dealer a couple days ago; I relayed what I had learned here to my dealer and asked them to check the car carefully for this issue before I took delivery. It was new info to them; they got in touch with Ford techs, did some tests, found that fault in my car, and updated the software. sorry, I didn’t get more precise details than that! We picked up the car today and are very happy with it so far.
I’m glad your dealer took this seriously. Mine essentially said, “if the factory said it’s fine and we see no required “updates” in the system, then you’re fine.” I believe contacting “Ford techs” would have yielded a different result.
 

dbsb3233

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I had my dealer check for software updates before I picked it up yesterday too. He said there weren't any. But mine had a 1/15 build date, which we think already has the updates in it. Jan 9 sounds like it was the build-date cutoff (at least for a particular update we've seen).

Still, I'll be watching it closely over these first few weeks.
 

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I had my dealer check for software updates before I picked it up yesterday too. He said there weren't any. But mine had a 1/15 build date, which we think already has the updates in it. Jan 9 sounds like it was the build-date cutoff (at least for a particular update we've seen).

Still, I'll be watching it closely over these first few weeks.
I asked them to apply any updates while I am waiting for my other issues to be fixed, but I suspect unless Ford Engineering extended them an update it's not in dealer hands yet. It does look like an OTA coming soon for all which address the open issues.
 

machefan

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I asked them to apply any updates while I am waiting for my other issues to be fixed, but I suspect unless Ford Engineering extended them an update it's not in dealer hands yet. It does look like an OTA coming soon for all which address the open 12V issues.
 

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I had my dealer check for software updates before I picked it up yesterday too. He said there weren't any. But mine had a 1/15 build date, which we think already has the updates in it. Jan 9 sounds like it was the build-date cutoff (at least for a particular update we've seen).

Still, I'll be watching it closely over these first few weeks.
Hope your right and you go worry free. Mine is being monitored in a heated garage not plugged in (which is not the condition when my problem happens) and therefore not too sure what they are monitoring. It will be tested when it gets back and have been informed it was updated. Hoping it is like yours and both are worry free. Plug it and forget it.
 
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ChasingCoral

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I had my dealer check for software updates before I picked it up yesterday too. He said there weren't any. But mine had a 1/15 build date, which we think already has the updates in it. Jan 9 sounds like it was the build-date cutoff (at least for a particular update we've seen).

Still, I'll be watching it closely over these first few weeks.
Not all bad those Mach Drops were moved to mid-January completion I guess.
 

agoldman

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Not all bad those Mach Drops were moved to mid-January completion I guess.
seems the case and fingers crossed. I assume the cutoff date would be after the car is assembled and electronics worked on. Because many of the drops went over to the build shop around the 7-8-9th. But then the final production date was 1/12 in my case for i8nsta nce, so that's cutting pretty close. I'm d3efinmetly going to ask my dealer to check that out before delivery.
 

dbsb3233

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Not all bad those Mach Drops were moved to mid-January completion I guess.
Could be. Time will tell. I don't think owners with any build dates can really let their guard down yet. The first 3-4 months could be bumpy as they flesh the early bugs out of such a radically different vehicle with brand new architecture.

But fingers crossed.
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