I thimk all coded access systems are blue top key from around 2001/2 but some systems can still be timed access even on a 2002, with Ford WDS you can select which access method you want to use if the system hasn't been entered before.
It lists Timed or Coded access, once you've made your choice then it will remain that way.
I've noticed with autodiagnos it lists coded access on live data so never even tried coding keys with it.