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 Post subject: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 2:38 am 
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Joined: Wed Sep 10, 2014 3:41 pm
Posts: 12
Location: Coronado, CA
We came back from vacation and my 12 volt battery appears to be dead. Door won’t unlock with fob or emergency key. Also tried holding fob against the door while using key. Can’t get into car to pop the hood and charge the battery.

Will this require a tow? If so, I won’t be able to take the car out of park either. Are there special procedures?

Please help!!

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 6:49 am 
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Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1667
Location: Los Altos, CA
There is nothing that should keep the mechanical key from turning in the lock. The problem is that the head of the key is very small. If you have to, use a pair of pliers to turn the key. That should be all that is required to get in the car.

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 7:26 am 
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Joined: Wed Sep 10, 2014 3:41 pm
Posts: 12
Location: Coronado, CA
I guess I’ll try pliers on it in the morning. I was worried something would break if I turned it any harder. My Prius valet key turns relatively easy without having to force it. Has anyone had the problem of a jammed lock before?

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 6:14 pm 
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Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1667
Location: Los Altos, CA
Unlock is a 90 turn clockwise. With the battery working, you probably get an assist from the power locks, but you should be able to open it by just turning the key.

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 9:58 pm 
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Joined: Wed Sep 10, 2014 3:41 pm
Posts: 12
Location: Coronado, CA
Well, I tried pliers. Did nothing but bend my key and scratch the paint on the door handle. Does anyone know if there is any way to access the hood latch cable from under the car if I remove any of the panels under there?

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 11:02 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3933
Location: San Diego
I'm going to guess that you do not have the original fob (it was replaced and coded, by not properly fitted to your car).

Try the mechanical key from BOTH fobs.

I don't recommend using pliers... you are going to break something.


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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Fri Jan 12, 2018 11:49 pm 
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Joined: Wed Sep 10, 2014 3:41 pm
Posts: 12
Location: Coronado, CA
Thanks all for your help.

Apparently there is some sort of electrical assist provided by the 12 volt battery and without any life in the battery at all, it simply would not unlock. I tried using pliers as suggested and that only bent the key and scratched the paint. Before with a bad battery I had gotten the door unlocked but there was probably still a little juice in the battery and the emergency key worked fine. Both keys and fobs were factory originals and I’m the original owner.

Toyota had no suggestion but to have it towed to a dealer. I called AAA and they confirmed they could open the locked door with their service technician. The guy was there in 10 minutes, had the door open in 2 minutes and jump started the car.

After charging the 12 volt battery for a while, I tested the emergency keys and they work fine again. I can also confirm that the lock was not gummed up or anything but would hit a dead stop after turning 20-30 degrees clockwise when the battery was dead. This point seems to be the point where the electronic unlock is triggered because now that the battery is charged somewhere near this point is where the doors unlock.

I hope this will help someone else in the future if you don’t drive your EV for a while.

On a side note, would it be possible to use one of those solar chargers that plugs into the cigarette lighter to keep the 12 volt battery charged when we are gone for an extended period of time? Because the whole electrical system is somewhat different than an ICE vehicle I wasn’t sure if this would work like it does on my other cars.
Thanks,

John

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 Post subject: Re: Locked out of car 12 volt battery dead—HELP!!!
PostPosted: Sat Jan 13, 2018 2:07 am 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3933
Location: San Diego
Replace the 12 volt battery now. Have this one shipped to you:

https://www.pepboys.com/product/details/838890/00836

Bosch Platinum Series AGM Battery Group, Size 24F
Part #: 24F710BAGM SKU: 838890

Or you may be able to find it in a Pep Boys near you. Call first. Don't let them talk you into any other battery.

Also, it's time to replace the key fob batteries:

CR1632, available at any store (Walmart, Target, Walgreens, etc)

How to do the replacement:

https://www.youtube.com/watch?v=mcCMMdbEUwk

How to use the mechanical key:

https://www.youtube.com/watch?v=pMx83u_JJ3M


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