If the IAC motor is a stepper motor (and I think it is), GM probably doesn't want techs to simply apply straight 12V to the coils and then think it's bad because nothing happens. A stepper motor has...
Type: Posts; User: FSJ Guy
If the IAC motor is a stepper motor (and I think it is), GM probably doesn't want techs to simply apply straight 12V to the coils and then think it's bad because nothing happens. A stepper motor has...
That would be my best guess. I never tried it, however. I'll have to take a look at a log and see what my IAC is doing when at idle...