Idle Control System: Notes
WARNING: This page is about a different car, the 1991 Mitsubishi 3000GT and 1991 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Idle Speed Control (ISC) motor used on DOHC engines controls a pintle-type air by-pass valve to regulate idle air by-pass volume. On SOHC engines, ISC motor adjusts throttle plate angle to regulate idle air by-pass volume.