I recently purchased an 05 Carmy (USA built with a build date of 2/05) and it only came with one aftermarket chipped key and one Toyota remote. A friend loaned me a CK-100 V46.02 Auto Key Programmer which indicates on its compatibility list it works with this generation of Carmy. I did some reading online and watched a few YouTube videos however I was not able to find a video specific to an 05 Carmy. I went to the dealer today and had a new Toyota chipped key cut and came home to see if I could program the new key with the CK-100. I went through the menus and selected 03-06 Carmy USA. Followed the prompts and after putting the key in the ignition and turning it on (not starting the car) receive a message indicating "ECU not found". Tried this several times without success. Then I selected the 02-04 Carmy USA option. I am able to go through the menus to the point it will allow me to add a new master key, erase all keys, clear codes, and reset the immobilizer. It does not provide an option to "add a new key" as it does on some of the newer model Toyotas based on the vidoes that are available. I am hesitant to proceed in the event adding a new master key and/or erasing all the keys while using the prior model year will leave the car inoperable. Some of the info found online references similar issues (Honda) and going back a prior generation allowed the keys to be programed. Any guidance/suggestions would be appreciated.