KOEO On-Demand Self-Test: Description
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
KOEO ON-DEMAND SELF-TEST is a functional test of PCM performed on demand with ignition on and engine off. This test will check that all inputs and outputs; (circuits, sensors, regulators, relays and solenoids) connected to PCM are electrically operating without fault.