ISC Initialization
WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, 2003 Subaru Impreza, 2003 Subaru Forester, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
The idle speed control (ISC) motor must be initialized whenever ECM memory is cleared. To initialize ISC, turn ignition switch on. Wait 3 seconds before starting engine.