GR Yaris Auto Door locking

No, I remember reading a discussion a while ago and it's not even possible within the Toyota Techstream system.

I'm sure someone mentioned if you had a Ghost installed it could be enabled though.
 
By auto locking, do you mean when walking away from the car, or whilst driving?

We want it to auto-lock when walking away from the car, as our other car (well, the boring one does, the Elise doesn't even have central locking...) does this, and it means we occasionally forget to lock the Yaris as we are so used to the other car locking when we walk away with the key. Any ideas if this is possible?