Gen 2 Reprogrammed Key Fob 2026 - Button Functionality?

Greetings All

My wonderful son somehow ‘lost’ half of the our original key fob. It was the button portion which locked and unlocked the doors. We could still slide in the portion with the battery, start the car, and drive the car - but could no longer open and close the doors remotely.

We bought an ‘unprogrammed fob’ off Amazon and successfully programmed it to start the car, but, we do not have the remote door opening and closing with the buttons.

Please advise: Should the newly reprogrammed key fob be able to lock and unlock the doors with the buttons? I know it is not the “smart keyless entry” type, but I thought the locks would still be able to be operated with the buttons.

I used the bulk of this thread: Buy new/used FOB for Prius 2 in 2022 | PriusChat to program the new key.

Two key differences: 1) Instead of buying off eBay the ‘unprogrammed fbb’ was bought off Amazon:

2) The original key fob was just the inside bit of the key fob which held the battery (but was enough to tell the car it was the key and start the car). The key fob did not have the door locking / unlocking button portion of the fob

Here is a link to the Amazon key fob:

Any feedback would be welcome!

 

Thanks Prius_Gnome | PriusChat! I also realized that too!

I re-did the Chicken Dance #1 just to be sure it was perfect. It worked and the new remote starts the car like a charm.

I did the Chicken Dance #2 for the door locking and unlocking and have no success. I know I am entering the programming state correctly with the car doing the ‘lock / unlock’ response properly. I’ve tried the “one time”, “two time”, “three time”, and “five time” sequence and cannot get the car to respond to the fob programming (two seconds w/ lock and unlock, two seconds with just lock).

I bought this key off Amazon:

But I really think this key is not the right frequency or is defective. I read in the reviews that the Chicken dance DOES and also DOES NOT work with the key so I took my chances.

Does anyone have a low-cost sure thing link for a 2005 gen2 non-SKS key? Or is there anything I’m missing?

THX!!!

 

Here’s the sequence and link for reference (with a small add in BOLD:

https://northcoastkeyless.com/2005-toyota-prius-keyless-entry-remote-fob-programming-instructions/



For the key entry:


TOYOTA KEY FOB REMOTE STEP-BY-STEP HOW TO PROGRAMMING INSTRUCTIONS

Minutes 5 minutes

1. Prepare Vehicle for Programming
   With the key OUT of the Ignition, OPEN and UNLOCK the Driver’s door.
   
2. Enter Programming Mode – Step 1
   Perform the following steps within 5 seconds:
   a. INSERT key into Ignition (Do NOT turn) and PULL the key OUT.
   b. INSERT key into Ignition (Do NOT turn) and PULL the key OUT.
   
3. Enter Programming Mode – Step 2
   PERFORM the following steps WITHIN 40 seconds:
   a. CLOSE then OPEN Driver’s door.
   b. CLOSE then OPEN Driver’s door.
   c. INSERT key into Ignition (Do NOT turn) and PULL the key out.
   
4. Enter Programming Mode – Step 3
   PERFORM the following steps WITHIN 40 seconds:
   a. CLOSE then OPEN Driver’s door.
   b. CLOSE then OPEN Driver’s door.
   c. INSERT the key into the Ignition and LEAVE it in the Ignition.
   d. CLOSE the Driver’s door.
   
5. Enter Programming Mode – Step 4
   PRESS POWER button (TWICE) to switch ignition ON (amber LED illuminated) and (ONCE) to turn OFF (do NOT depress the brake pedal during procedure).
   DO this ONCE to retain existing remotes programmed and ADD NEW remote..
   DO this TWICE to ERASE all existing remotes programmed and ADD NEW remote.
   DO this THREE times to CHECK how many remotes are programmed to the vehicle.
   DO this FIVE times to ERASE all existing remotes programmed.
   
6. Enter Programming Mode – Step 5
   REMOVE key from Ignition. The power door locks will respond by cycling the locks from LOCK/UNLOCK to signal successful entry into Programming Mode.
   
7. Program Remote(s)
   Perform the following steps within 40 seconds:
   a. PRESS and HOLD the LOCK and UNLOCK buttons on the remote simultaneously for 2 seconds. RELEASE.
   b. PRESS and HOLD the LOCK button and hold for 2 seconds. RELEASE.
   The vehicle will respond by cycling the locks from LOCK to UNLOCK to indicate successful programming of the remote.
   
8. Program Additional Remote(s)
   REPEAT Step 7 for any additional remotes to be programmed, including working ones.
   
9. Exit Programming Mode
   OPEN Driver’s Door to EXIT Programming Mode.
   
10. Test Remote(s)
    TEST all remotes. Programming is complete.
    
11. Share
    If these programming instructions helped save you time and money, please consider sharing our website with friends and family so they can do the same.

Supply:

• Key Fob Remote(s) that you want to program to your vehicle.

Tools:

• None

Programming Notes:

• Verify the following prior to following these instructions:
  • Your vehicle is equipped with keyless entry, and
  • You have a key fob remote that is compatible with your vehicle.
• Obtain ALL remote transmitters for this vehicle.
• If you have a SILVER Toyota logo remote, this procedure WILL NOT work for your vehicle.

• • If you have a BLACK Toyota logo remote, this procedure WILL work for your vehicle.

 

Thank you Prius_Gnome | PriusChat and Dennis Brown | PriusChat, I am the original owner. We have never added keys so we should be good to go. I understand the “do it once for new key”, and so on. The car responds correctly after the sequence. However, we are down to one original key and the button section has been lost so it can’t be used to ‘train’ the new one.

So I have tried the ‘5 times’ version which should wipe the memory and allow me to start with a fresh key. No joy. No matter which sequence I try the car NEVER responds to the “hold down both lock and unlock” and then “hold down just lock” never ever does anyting.

Since the car won’t “take” the new key no matter which sequence is used I think the key itself it incorrect. It’s battery is good. I tool it out and metered it - and - the little red LED shines when any of the buttons are pressed.

So - does anyone have a better ‘blank’ key that’s a sure thing w/ a Gen2? Could it be this key and I just buy another to test? The eBay and Amazon choices all say they should work but I’d like to avoid buying and testing.

THX!

 

Thank you for sharing the video. This gets to the root of the problem. I only have the battery holder / tiny chip portion of the original key. This portion is sufficient to start the car and satisfy the immobilizer. It also worked to program the new fob for starting the car and satisfying the immobilizer circuit.

Since I do not have the other portion I tried pretending the new fob was the old fob to do the 1-cycle and 2-cycle dance. Since neither of those worked I went to the 5-cycle dance which should wipe out all old keys and allow one to program a new one from scratch. None of these worked.

I thought it may because the new fob was programmed to the old fob for the immobilizer, but no joy.

Any ideas from here?