[These instructions are from 'John' here on the forum- 2006
After lots of tries (and failures) using the directions on the Forum, I contacted East Coast Locksmiths. Tami provided me with directions that were similar to those posted on the Forum, but a bit different than the ones I used. She said that, for some reason, people had problems successfully programming keys for this car. Might be timing?? Mine is a 2002 that was built in August of 2002 -- one of the last ones for that year. So, at least for this car, the dealer didn't block out key programming.
The directions follow.
Key Programming
1. Close all doors.
2. Insert an already programmed master key into the ignition.
3. Turn the key from the OFF to On and back OFF FIVE (5) times.
4. Open and close the drivers door SIX (6) times.
5. Remove the key from the ignition.
6. Insert the new key you want to program into the ignition.
7. Wait 1 minute. The security light will be blinking for this one minute. When it stops blinking your key is programmed. To end programming step on brake one time.
Timing may be important. I did the key on and off to the count of 1 Mississippi, 2 Mississippi said in regular speach -- or just about on the second. Then switched keys in 3-5 seconds. Then opened the door to the same beat.
The Security light flashed for about a minute and then went out. I then hit the brake once -- proably within 3-5 seconds of the light going out.
Then started the car with the newly programmed valet key. I assume the same thing would program a new master key. Question? Can you have more than one master key? If so I may buy one and try again. Hate to lose or break the master from what I hear.
Also, here were her directions for programming the remote on the master key. Let me know if they work.
Remote Programming
1. Close and lock all doors. Unlock and open drivers door.
2. Put key into ignition and remove TWO TIMES.
3. Close and open the drivers door TWO TIMES.
4. Put key into the ignition and remove.
5. Close and open the drivers door two times.
6. Put key into the ignition. Close the drivers door.
7. Turn ignition ON then OFF ONE TIME- this will put the car in ADD mode for your remote. (Turning the ignition ON then OFF TWO TIMES will ADD the remote but will erase all existing remotes.)
8. Remove the key from the ignition. The door locks will cycle one time (or two if you are erasing) . On the REMOTE press and hold the LOCK and the UNLOCK button for 2 seconds. On the REMOTE press the LOCK button for one second.
AT THIS POINT, the locks should cycle by themselves ONE time. This means the procedure was accepted. IF the locks cycle twice it has failed. IF this happens you must start over. Hold the remotes higher up for better reception
9. Open and close the drivers door. Put key in ignition and pull out. This will end
programming.
Thank youi Tami!!!! Saved me $80 and a big hassle. I got the key from Sewell for way less than the local Lexus dealer.
2002 Sc430 Key Programming
in 01 - 10 Lexus SC430
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