The setting has nothing to do with a friend, since that belt is not touched when the alternator goes through different places, now it is what Alge says, but if the problem persists and as you said that you had resenty problems since before, it could be that you have problems with the IAC, but first of all check and try to train your ECUE again, to calibrate the IAC when the configuration is taken or loses the configuration You kiss for a time for about 4 seconds and the third time you start, it is a kind of self regulation that possess tests and let us know