I am not sure what it is that you are asking.

So far I have not met any problems diagnosing Corsa C or Meriva , although I don't need to go into dash specificialy most of the time. With the autoscan however not met any problems so to me it seems it can see and read the body control modules just fine?

Is this a specific issue for a car that has specific issues maybe?

 Is the vehicle staring or its Immobilised...............? If its not starting then check the multi plug connection behind the dash as its common for loss connections...........

 Ah pincode reading is what you mean. Isn't this in the CIM? Don't have one around right now but I know I have searched for ways to read the pincode with MaxiSys for Opel as well as other cars also and truefully ended up with other tools to do this (and they also don't do all cars). Still lot's of improvement to make on this part. Just notifiy Autel from your account (login to your account and post your info under 'your issue' ) so they are aware of the issue.

Or, if others do know how to get it done, please share your experience since more than a few people would love to know