GEN 1 -No Key! Need steps to add transponder key to ECM memory, key file

Discussion in 'Generation 1 Prius Discussion' started by lovemy02prius, Nov 9, 2020.

  1. lovemy02prius

    lovemy02prius Member

    Joined:
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    Vehicle:
    2002 Prius
    Model:
    N/A
    Hey there Locksmithy! Chap and everyone whose spoken on Gen 1 keys, i read your awesome posts from 2014 and i need your 2020 updated help !

    i'm gonna try and do it myself with a friend!! i'm confident we can make it happen with the up to date remedy!

    Here's my story
    i lost my only key to my 2002 prius. Don't want her to sit too long so today i went to the dealer and got two transponder keys made using my vinn number. My two Transponder keys have black tops as thick as three quarters / RFiD.

    Now i need to add (flash) these two keys to my ECM (key file)

    Could someone please share the up to date hack or steps by step instructions and any photos!
    * What tools do i need exactly?
    * Wheres the correct ECM located
    * How do i get to it?
    * ToyotaTechstream needed? PC?
    * Do i need to remove the ECM or just get close or manually plug in to it?

    i have a good friend thats mechanically inclined and pretty nerdy too (mostly hobby projects on my prius and his vw's) so we have time to the job, lots of tools and a garage
    Thank you so much!
    : )



    Below is a post that caught my attention!
    ------------------------------------
    2014 Locksmithy:

    Please allow me to clarify what is going on with chips and programming procedures on Prius:

    1. 2000-2003 Keys can be added, if you currently have a master key. A master is one that will produce NO flashing of the immobilizer light when introduced to the ignition by either turning a key or passing a swipe, depending on two your model is so equipped. A valet key will illuminate the theft light for about a half to three quarters of a second, then extinguish. Valet keys can not be use to initiate adding keys. If all keys are lost, the system can be reset, but it requires removal of the ECU to service. Once done, you will have master keys once again. This is far less expensive than replacing the ECU or trusting EBAY as your solution to all things cheap.
     
  2. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
    2010 Prius
    Model:
    IV
    If you don't have an already-registered-as-master key on hand, the car will not allow you to register the newly-purchased ones.

    The only Toyota-published procedure to recover when there is no master key available is to replace that ECU. Arts Automotive has a nice article about that.

    It is possible that there are some locksmiths (or "locksmiths") who have developed techniques to reset the ECU without exchanging it for a new one. If so, those techniques may well involve opening the ECU and connecting to internal points on the circuit board.
     
  3. lovemy02prius

    lovemy02prius Member

    Joined:
    Jul 24, 2014
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    Location:
    ferndale
    Vehicle:
    2002 Prius
    Model:
    N/A
    ok ChapmanF, thank you! and yeas we had the transponder keys programmed by a local locksmth, so were good for now! and back on the road!!!

    But REALLY would love to know how he managed though! The dash doesn't seem to be touched, dusty and no hand prnts whatsoever! Maybe they found a way through bluetooth?? or other method????

    anyone out there had to programmer there own on a gen 1?
     
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