I think I might know the answer but I would like you to confirm my logic...

SO, Kanan's pilot ability allows to reduce the pull of red dice of an enemy ship by 1. Same is with suppressive fire from Rex. Now, if the opponent rolls no dice (Autoblaster Turret after these reductions) is he still allowed to use Accuracy Corrector to cancel zero dice results (all dice results) and add 2 hits?

I would say yes, same as you can modify 0 dice with Focus etc.

Yes this works fine.

Right. Adding dice results from Accuracy Corrector isn't limited to the number of dice you roll. So:

Roll 0 attack dice

Defender modifies 0 dice

Attacker cancels all (0) die results and adds two hits

Yeah, you would just cancel 0 dice and add 2 hit results. This has been coming up a lot lately now that folks are running a lot of PS10 Nym with Autoblaster Turret and Accuracy Corrector. You can also use this trick to get around the Weapon Failure crit.