Circuit Description
WARNING: This page is about a different car, the 1998 Cadillac Seville, 1998 Cadillac Eldorado, and 1998 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The PCM stores a calibrated time that it considers to be a valid spark knock duration. If PCM sees a knock event that is longer in duration that the acceptable stored time, DTC will set.