KOER 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, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
KOER ON-DEMAND SELF TEST is a functional test of PCM performed on demand with engine running. Temperature is not a factor, but A/C must be off. A check is made on Injection Control Pressure (ICP), Exhaust Back Pressure (EBP) and Manifold Intake Air Heater (MIAH) systems. During this test, engine RPM will increase. PCM will first command ICP high and low, then command EBP high and low. A fault must be present at time of testing for KOER ON-DEMAND SELF-TEST to detect a fault. If a fault is detected, a DTC will be output at end of test when requested by a scan tool. Only a hard fault DTC will be displayed.