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Checking the ICV control voltage is actually very easy. Leave the ICV installed and disconnect the electrical plug. Start the engine. You should be able to measure battery voltage, i.e approx. 13V between terminal 2 of the plug and ground. To check voltage on terminal 1, you need an scope - you should see about 100Hz oscillations. If you get 12V on terminal 2, I would borrow another ICV and install to see if that makes a difference.
Idle speed contact is between 52 and 24 with ground bridged to 30 - as per workshop manual.
BTW, is this a Tiptronic? The 2 micro switches are different on a TIP - the WOT switch is integrated into the throttle position poti...
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'91 C2 Targa
Last edited by cjoenck; 07-23-2008 at 09:44 AM..
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