Programming Extra Remote (NONE WORK NOW!)

[SevargMT]

I was trying to program a 3rd remote for my '06 GTS. Now ***NONE*** of them work! When I bought the car the dealer only gave me one key & remote... After fussing they sent me a replacement and said they'd lost the original. I had to have the key programmed at a dealer but was able to program remote #2 following the directions below this. Now, about 20 months later, the dealership found my original key and remote which they mailed to me and I received it this past Saturday. The key worked but the remote wouldn't. So I go through the procedure for programming a remote. Everything SEEMED to work okay. I drove the car to work the past two days and everything was fine. I grabbed one of the sets of keys (and remote) that I haven't used in the past two days and the remote wouldn't work. So I go after the other two sets of keys and none of the remotes will work now. When I tried to go through the program steps now I can't get the car to respond properly. After I finish STEP 5 the ECU does not resond... But if I shut the door again I get the lock/unlock a couple of times. Or if I pull the key out after STEP 5 I get the lock/unlock a couple of times. But not one remote will work. I'm still under warranty, should I take the car in and say "WHAT'S UP?" or can I fix this myself? Any help would be appreciated.

Thanks!

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PROGRAMMING STEPS (found in another thread)

Step 1: Open driver side door and leave open.

Step 2: Lock and Unlock the drivers door using the power door lock switch on the door

Step 3: Insert key into the ignition.

Step 4: Turn Key to ON position and return to Lock (off) position. Do this 3 times within 10 seconds. LEAVE key in the ignition in Lock (off) position.

Step 5: Close and open the drivers door 3 times. Leave door open after this step

Step 6: ECU should respond by locking and unlocking the doors once.

Step 7: Press any button on remote #1 twice. ECU responds by locking and unlocking the car doors.

Step 8: Additional remotes, repeat Step 7 for up to 3 remotes total.

Step 9: Remove the key from the ignition and the ECU will respond a final time with a series (about 4) of door locks and unlocks. You're done!

[icspots]

<div align="left">Okay let me make sure I got the key points (no pun intended). Please let me know if any of the facts are off.

-you bought the car with one key/one remote
-the dealer gave you a second of each and both were programmed in without incident for a total of two keys/remotes
-the dealer found the original ones and sent them to you. Now you have three keys/remotes.
-the key worked (without programming?) but the remote didn't
-You programmed the remote back in, and all three remotes worked for several days
-spontaneously all of the remotes stopped working and you can't program any back in

If I have that all right at this point then I'll jump right in.

First off the key they sent you shouldn't have worked without programming. Every time you program in remotes or keys you have to program in all the remotes/keys you want to work. Any previously programmed remote/key that you don't program back in at the time you add something becomes unprogrammed. There's something a little fishy in that unless the dealer specifically left that key code in the ECU when they programmed in your "replacement" key, or they had it at that time and just didn't give it to you. To that end if you programmed in the third remote and didn't also program in the other remotes at the same time then the other two would be invalidated.

Second if all three of your remotes did work and then spontaneously stopped working I'm lead to believe that it's not a problem with the remotes themselves, but a problem with either the KEU or the ignition switch. By chance does your car continue to make the "key in ignition" chime when the doors are open and there isn't a key in the ignition? If so then the ignition cylinder went bad and is telling the car there's a key in when there isn't, and on the 3 the keyless entry doesn't work when there's a key in.

Third, that's all I can think of right now, but let me know if I have the details correct and we'll go from there. If we can't figure it out then definitely go to the dealer since it's under warranty.

[SevargMT]

Well... UPDATE: Yesterday evening I was out messing around my vehicles and decided I'd try programming the remotes once again. For some odd reason it worked like a charm. All three remotes (along with the keys) work correctly now. Before the car wasn't responding like it should after opening/shutting the door three times in the steps. This time it did. I happened to have all three sets of keys handy and was able to do all three remotes without a problem. This isn't to say that tomorrow they'll continue to work. I had called the dealership and was going to take it in this afternoon for a look -- they had told me to bring all three sets of keys and remotes. I'm wondering if I didn't botch something and the car had a defense mechanism that was preventing me from programming the remotes -- and then after a certain amount of time the defense went down? I haven't tried to program the remotes again for about 48 hours. So I'm going to save myself the trip to the dealership because it's about 150 miles... If it happens again I'll take it for a look.