Here is the step by step instruction on programming Toyota G chip key by using SuperOBD SKP900 key programmer.
NOTE: you need initialize your ECU before all key lost.
You need prepare the register main key and new key for use.
Then connect SKP-900 device to the car
The immo lamp on the car falshes
Then start SKP900
Choose OBDII adapter and turn ignition on
Insert the registered main key and turn ignition on
Insert the adding key and turn ignition on
Program succeed after immo lamp extinction
Insert the new key to test- it’s working
TOYOTA G chip programming success!
Tips: copy G chip by Handy Baby vs. program G key by SKP900:
With JMD handy baby, you need the original key to copy data for the new key via a specialialized G chip
but skp900 key programmer can directly program a key with a G chip in the car.
Tech support from http://www.obdii365.com/