IAC Operation dodge caravan

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dw85745
Posts: 8
Joined: Fri Feb 12, 2016 12:34 pm

IAC Operation dodge caravan

Unread post by dw85745 » Fri Feb 12, 2016 12:48 pm

1994 Dodge Caravan 3.3L
Understand IAC is a stepper motor and PCM controls steps in and out. Believe steps range from 0 To 200.
What I don't understand is this:

1) Does the PCM keep a "permanent" IAC count (last step count at shut-down)
OR
2) Does the PCM reset the step count (say back to zero) at Start-Up or Shut Down and retract the Pintel to that base position ?
3) At "Initial" Start (KEY-ON) where should IAC pintel be located?