[Ali Imran]

 Surah 10:94 instructs Muhammad to seek clarification from those who possess previous scriptures (Jews and Christians) if he has any doubts about the revelations he received, not to question their beliefs....

Would Allah ask Muhammad to check with corrupted scriptures? 

That is a wrong understanding of the Quran. 

I've explained to you already. This is regarding revelations, not the content of the revelation. The pagan Arabs of Makkah were skeptical that Allah would communicate to mankind via revelations, which we know as scriptures. So Allah asks them to check with the children of Israel, who have been receiving revelations from Allah for more than a thousand years already.