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

uid 55's pic
posted by  john sargent on  Sat Oct 9 08:40 CST 2004
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last visit: Wed Oct 22 09:07 CST 2014
[RELATED]

"But, that concept has some disturbing refutation in green manual suggestions I've seen quoted second-hand, where alternatively base idle is set with the hose pinched."

My Green Books say to set the Basic Idle Speed by grounding the red-white wire of the test point. Pinching a hose works, but that is not the Green Book method.

"Abe also addresses the mixup possible with those two 3-pin plugs. I think it might be easy to damage the ECU (IAC driver transistor) if even momentarily run that way."

The ECU is not damaged by this exchange of wiring connectors. I know this from personal experience. Using identical wiring connectors is poor design on the part of Volvo and Bosch.

"Thanks for finding that (however did you?) and posting."

I used to print and save meritorious posts in three ring notebook binders. I found it there, and then went to the archives. It was not saved in the archives, so I quoted Abe since I couldn't provide a link.

I do wish Jarrod would do some programming so some of us could be moderators and put a Red Star on top quality posts.
--
john






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