This article show a gudie on how to use Smart CN900 Mini programmer to clear/empty Toyota Samrt Card.
Procedures:
Power Smart CN900 Mini,and put Toyota Smart key into the coil
Then clcik “Read & Copy”

Please Wait…Don’t Move the key

Check the Toyota Smart Card information,and click “BACK” button

Click “Special”

SMART KEY

Click “CLEAR BYTE”

Then it will prompt masage,”74 SMART KEY ID:32 17 56 FD” Clear it?
Click “YES” to continue

Please wait… Don’t move the key

Success

Done!
Smart CN900:
http://www.uobdii.com/wholesale/mini-cn900-key-programmer.html