2006 Prius Smart Key fob issues

Discussion in 'Gen 2 Prius Technical Discussion' started by sli, Aug 22, 2021.

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  1. sli

    sli Junior Member

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    I am the original owner of a 2006 Prius.
    If I put battery in the key fob, it will occasionally trigger the car alarm. However neither lock/unlock buttons work consistently. The lock button works every now and then. I can insert the key fob into the key slot and can start the car.
    By the way, the tiny LED in the key fob blinks when I have a battery in it. What does that indicate?

    That is my only key now. I understand without a fully functional smart key fob, I can't even get the car to accept a replacement fob by doing the "chicken dance".

    Any suggestion will be appreciated.
    TIA.
     
  2. dolj

    dolj Senior Member

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    Location:
    Wellington, New Zealand
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    2007 Prius
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    It indicates the fob battery is low. It needs to be replaced. Check any new battery with a voltmeter, especially these CR2032 button batteries, as there are too many new batteries that have sat for too long and are in fact flat when sold. A new CR2032 should be 3.2 - 3.4 V when new. If they are 2.9 V (or lower) you will have problems with your key fob.
     
  3. sli

    sli Junior Member

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    Thanks, I will double check.
     
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