Key fob battery?

Discussion in 'Prius c Audio and Electronics' started by FirstName LastName, Mar 19, 2018.

  1. FirstName LastName

    FirstName LastName Junior Member

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    Hi all, when getting a new key today, the tech said "hmmm, the button doesn't seem like it's working too good, may need a new battery". Can I pop these keys open and replace them? Doesn't need to get reprogrammed? Is it a 2032 battery? It's a 2014 C. It looks like a regular key, not a switchblade type key.
     
  2. bisco

    bisco cookie crumbler

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    yes, yes and no. not sure on the battery type, it is spec'd in your o/m.
    but i have to ask, if you're getting a new key, shouldn't it come with a new battery?
     
  3. FirstName LastName

    FirstName LastName Junior Member

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    Yes! But it was the old key that came with the used car.

    Thanks!!! It does look like 2032's and I remember ordering a dozen or so from Ebay a few years ago. Should be in my freezer
     
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  4. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    Pop it open first, to verify the battery that's in there?

    I was not impressed with our 3rd gen fob btw: it'd be really nice if the battery was in an isolated compartment, not in the main zone, requiring complete opening up, exposing fragile electronics.
     
  5. FirstName LastName

    FirstName LastName Junior Member

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    Oh yes, it is working, its the one the key guy made a copy from. So the original old one he said "hmm, seems kinda week". So I'll try putting a new 2032 in it tonight.

    Found the manual online, shows how to open the key, and then remove the module, and then open that up.
     
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  6. FirstName LastName

    FirstName LastName Junior Member

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    Welp, that didn't work. Just opened it up and saw a 2016 battery in it. I thought maybe that was wrong but I opened the manual.pdf and it said "keys without smart key system uses 2016 and keys with smart key system uses 2032's. So off tomorrow to get a 2016
     
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  7. DKTVAV

    DKTVAV Active Member

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    I made the same mistake in the opposite way for my Smart Key:(
     
  8. FirstName LastName

    FirstName LastName Junior Member

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    Got a new multimeter and battery was reading like 2.5 so I replaced it. Reading 2.9. So all good for a while.
     
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  9. bisco

    bisco cookie crumbler

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    ouch, i just put a new duracell in, 3.06v
     
  10. FirstName LastName

    FirstName LastName Junior Member

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    That's good. I should check it again. I just got this brand new multimeter so maybe I was holding it funny. I'll try with the other one that's in the package. It should be reading at least 3.0 right?
     
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