I have 2005 and was able tp program it first time. I would like to get a look at your instructions and compare them to mine. I kind of remember that there is a instruction or 2 that was different on my 2005 compared to other years..

As I recall there was a whole series of open doors close doors turn key open doors etc step on brake. I kind of thought it was stupid when I was doing it but it worked the first time. I had to insert the orig master then remove and put in the new key . The remote programs after you program the immobilizer chip .

 

Look at the first post in this forum topic. Those are the directions I followed.

 

I will compare those instructions to the ones I have
On Monday when I am back In my office and will
Let you lnow

 

I do not think you ruined your key. I think you will just have to start from the beginning. Please read the directions in the first posting in this thread. They do work. You will now need to follow both sets of instructions. The first set to get the key to start the car, the second to get the three buttons programmed.

Also, this instruction was added by a member a few posts after the first instructions and I think it is important:

"I found ACC-ON works much better. If you go too far and get to LOCK position you will not get the flashing light. Also putting the new key in the on position seemed to be required rather than just in the ignition for programming to complete."

Hope this helps.

 

I tried this again a number of times without success. The security light never goes off after one minute. Any other hints?

 

This is a PDF of the instructions I used to program my key for immobilizer and remote programing.

I did not compare it to the first post of this thread

 

Thanks for the help. The directions are a little different. I.e. Wait 2 minutes rather than one minute. I went to the dealer and had it done. $33 and a car wash so wasn't too bad! Now I'm good to go! Again, thanks for helping!

 

Bought my SC last fall. It came with one key and I wanted an extra so I followed Joe1000 (post 116) and bought the ebay key for $80 plus $3.50 shipping. Had it cut at local hardware store for $5.00 Programmed key and remote with instructions at beginning of this post.
I couldn't be happier. This key looks and works exactly like my original Lexus key .
Thanks to everyone on this forum.

 

Can anyone confirm that this works for the 2006+ cars, as I have jumped through the hoops on the instructions a few time with no luck in programming a new master key. In reading the thread, it looks like all the comments come from 2002-2005 cars?

 

I programmed a transponder key for my 2002 SC430. I bought the key on ebay for $9.49 and paid a locksmith $30.00 to cut the key. I followed the steps for programming this key (no remote). On the way home the check engine light came on. I hoped this would not interfere with my programming the new key (it did not). I tried over and over again with no success. I tried one last time before going back to the locksmith for programming. This time I turned the ignition on 5 times and opened and closed the door 6 times and took the master key out of the ignition and put the new key in doing it as fast as I could approx 10 to 12 secs and it worked. I hope this helps someone.
Remote key Programming

http://www.ekeylessremotes.com/click...uctions-lex-1/

Programming with just the starter chip

http://my.is/forums/f221/diy-key-reprogramming-334593/

Successful 2002 SC430 programming
https://www.clublexus.com/forums/sc-...ogramming.html

 

Appreciate the feedback and that approach is confirmed for the 2002-2005's - just looking for any confirmation on this approach with a 2006-2010.

 

To Britsti
Try this website to find your key programming instructions maybe they are different.
http://www.ekeylessremotes.com/click...uctions-lex-1/

 

I took my eBay key to a local hardware. He cut it but would not guarantee it.. Took it home and programmed it like the above instructions.. works fine.

 

I have 2002 Sc430, when I purchased seller only had 1 key. My key cracked & I lost the guts (chip). I have purchased 2 cut keys from Ebay & engine turns over but it won't start. How can I program these WITHOUT a working key?????

 

Follow the directions on the previous threads. Good luck. Worst case, you will have to call a locksmith.