My customer had the key code function blocked problem when he used Honda HDS HIM to programming keys for CIVIC 2008. Here is the solution provided.
When process to enter pin code, he enter pin code 3 times, then the HDS displayed error message "This function blocked. Get the unlock password distributor in / Genpo (LAC)"
Honda PCM security pin code is required when programming keys. You should enter pin code to access immo. If you eneter the wrong pin code for 3 times, the HDS immo key programming function is blocked.
If your Honda HDS is locked, please send the HDS HIM back to repair.
If you need to program key by using HDS, better get the Honda IMMO PCM Code Calculator to get the pin code first.