No immobilizer chip in FOB

Discussion in 'Gen 2 Prius Technical Discussion' started by foreverPriusCar, May 11, 2026 at 11:36 PM.

  1. foreverPriusCar

    foreverPriusCar New Member

    Joined:
    Monday
    1
    0
    0
    Location:
    florida
    Vehicle:
    2006 Prius
    Model:
    II
    So I purchased a used 06 Prius w/smart key but the previous owner lost or didn't transfer the immobilizer chip to a new fob shell. Car still starts, unlocks, locks etc with the smart key but it will not start with the key in the key slot. From what I've read, I can use Techstream to reset just the immobilizer codes to reprogram a blank key, right? If I can get the immobilizer chip reprogrammed I can program spare key fobs myself.

    Please let me know if I'm incorrect in this assumption.

    Plan:
    - Get techstream with minivci cable
    - Get seed code to calculate pin
    - Reset/clear Immo codes
    - Pair car and new fob
    - Move immo chip to old fob
    - Run through process to program additional fobs with creader elite

    TIA!

    EDIT: I'm working on making this the last car I'll own.
     
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    13,604
    2,461
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    This has changed a lot in last 90 days . Look at this thing called tlk1 2 or 3 read them carefully . Because lost transponder chip you will have to go to obd365 and buy a blank coffin the transponder chip .. then have it burned by a locksmith . I don't think tech software can burn a chip . Or write a chip 9 could be wrong . But tech has no transceiver. Or way to send radio waves to the chip to burn the numbers in . Tools like londsor k518 for all keys lost scenario in the electronic end of all of it . This has nothing to do with the blade .
     
    BiomedO1 and foreverPriusCar like this.
  3. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    4,358
    2,286
    0
    Location:
    Left Coast
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    The electronic key and the physical key are two completely separate things. I believe you need to have the primary key, in order to program another access key. If you don't have the primary key; you'll need to access through a fully registered, updated, validated, certified Techstream. That lock-out is obvious; to prevent easy car thief.
    The dealership is your best bet; though some locksmiths has those electronic tools - but I can't see them being able to afford the licensing and access rights; without doing a whole bunch of them every month.

    Good Luck.....
     
    foreverPriusCar likes this.
  4. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    13,604
    2,461
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Toyota ALK requires no licensing or any of that stuff it's a standard anyone can buy tools and access easily now . For like 59 bucks . 8 have several . Look at tlk 1 just for fun theirs a video watch it . This is one method .
     
    foreverPriusCar likes this.
  5. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    28,263
    18,717
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    I always thought those little immobilizer chips were managed the same way as original TPMS transmitters: you don't 'burn' anything into the chips; each one you buy just has a unique code already burned in, and you teach the car to recognize that (which Techstream can do).
     
  6. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    13,604
    2,461
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    If you look on sites like obd365.com you will see bags of the coffins . They may come as you say but they can apparently be rev burned the programmed with tools like tlk1 which can relearn fubar factory remotes if it's all they're. with the missing coffin now a 30.in connector to OBD2 is needed in our old cars that immo box is under dash pad. In newer cars you just open pass. Door pull plate off insert 30 pin to OBD2. Now the I'mmo box will be ready to get original chip id. Do he can burn or program a complete remote with that data . To work system he can test data first from the setup he using once confirmed working but or program remote ..