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IAC Valve: Does it operate only at Fully-Open & Fully-Closed modes, or are there different positions ? 700 1985

uid 27's pic
posted by  Art Benstein on  Mon Sep 20 18:05 CST 2004
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Only thing I can think of that has happened before: If you accidentally swap the two 3-terminal connectors between the IAC and the TPS, the armature winding in the IAC will tell the ECU closed and full throttle at once. The only significant message is closed throttle. That causes one of the transistors feeding the IAC motor on pins 10 and 23 to let some of its precious smoke out trying to light up the TPS switch contacts with 12V. I imagine it doesn't take too long either.
--
Art Benstein near Baltimore






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