Failure Conditions
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
ISC motor in forward mode, throttle position 14 degrees or less, and ISC extending for 30.3 seconds, or ISC motor in reverse mode, throttle position 2.1 degrees or greater, and ISC retracting for 30.3 seconds.