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RyZt

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I'm wondering about the backup "jumper cable" port on the front bumper. Does this mean someone with a 12v booster pack can go around popping peoples' frunks open? Or is this (hopefully) only possible with a key fob also within range? I'm hoping for the latter.
I think it's unlikely to only work when key is in range. That would require way too many components to work, and is probably inappropriate for a fail safe mechanism.

I expect that this would only work when the 12V is dead?

Tesla also provides emergency mechanism to open frunk in all models. I just Googled about it, so take my words with a grain of sort. In S/X, any one can open it without key. In 3, the mechanism only works when 12V is dead.
 

sockmeister

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I think it's unlikely to only work when key is in range. That would require way too many components to work, and is probably inappropriate for a fail safe mechanism.

I expect that this would only work when the 12V is dead?

Tesla also provides emergency mechanism to open frunk in all models. I just Googled about it, so take my words with a grain of sort. In S/X, any one can open it without key. In 3, the mechanism only works when 12V is dead.
I considered that, too. I think you're right -- it probably only works when the 12v circuit is dead. I suppose that is acceptable.

Although, just to play devil's advocate, I guess if somebody was REALLY interested in getting into the frunk, they could short the terminals or put a high load on them for a while, untill the battery was dead, and THEN connect 12v there to open the frunk... bit of an edge case though 😅 better off smashing the windows to get in.
 

macchiaz-o

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It says you can use jumper cables to get into the car if the battery is dead. The only problem is I generally keep my jumper cables inside the vehicle.
At this point, we need the owners manual or the vehicle (to run experiments) to know more.

There might be capacitors allowing the e-latches to be used a few times during a power failure. Or there might not. And if they are there, does it require pin code, PaaK, or key fob? Etc...

Really need more info here. ;)
 

LYTMCQ

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The second half of the video seems to indicate that there is no mechanical backup access to the car if the battery dies.
Same issue with Teslas and Tesla has had a lot of 12V battery failures with no warning leaving owners stuck or stranded.

Since these are 12V control batteries that don't have to crank the car or other heavy duty functions, the failure appears to be in the charging system. A good 12V battery used simply for controls should last as long a the main battery in the car.

"Tesla to fix rapidly dying 12v batteries with software update, Musk teases more to come"

https://electrek.co/2020/09/15/tesla-fix-dying-12v-batteries-software-update-musk/
 

krafty81

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I think it's unlikely to only work when key is in range. That would require way too many components to work, and is probably inappropriate for a fail safe mechanism.

I expect that this would only work when the 12V is dead?

Tesla also provides emergency mechanism to open frunk in all models. I just Googled about it, so take my words with a grain of sort. In S/X, any one can open it without key. In 3, the mechanism only works when 12V is dead.
So if I walk by my Mach E in the garage (with my phone) while I am headed to my other car next to it, the door will pop open?
 

1pt21Gigawatts

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The second half of the video seems to indicate that there is no mechanical backup access to the car if the battery dies. That's new to me, seems like a safety issue having to wait outside until someone shows up with jumper cables.
It is really weird, because I know that on the same electronic latch system on Lincoln, there is a mechanical release. I guess it was a cost saving measure here, or they think it’s a lot more reliable because supposedly the high-voltage battery will keep the 12 V battery charged so that the doors will only die if you’re SOL anyways..
 

macchiaz-o

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It is really weird, because I know that on the same electronic latch system on Lincoln, there is a mechanical release. I guess it was a cost saving measure here, or they think it’s a lot more reliable because supposedly the high-voltage battery will keep the 12 V battery charged so that the doors will only die if you’re SOL anyways..
It's similar but not the same. The Lincoln system seems to use a motorized latch and unlatch, while the Mustang seems to be just the unlatch while also adding in a pusher rod.

Also the Lincoln help video makes special call out to the super capacitors, while so far, Ford's latest videos are not mentioning it.

https://owner.lincoln.com/support/how-tos/technology/safety/e-latch-door-handles.html

And like you pointed out, there is a mechanical key provided with the Lincoln, and AFAIK no support for PaaK.
 



 









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