I did many Corolla G type before and always success to add a key on corolla 2011-2012 and it allways gscan asked for any working key, but now i get error “not a master key”.
Optional solution one:
Add key no need immobox if u have Toyota Techstream, try using Techstream is better than x100.
Techstream can’t reset immo.
When you get error “not a master key”, try to read pg1 and see.
You need master key, you can check it by insert key in switch ,if immo light goes immediately its master , if not its valid and need to get immo out.
Optional solution two:
I have done many of these Toyota G keys when all key lost, you need to remove the whole dash to retrieve the Immo box which has 93C66 , writing Master G key by Tango key programmer to start car. You can add key only when you have master key. I was told that in USA you can reset the Immo using MVP key pro, but it is only for USA.