KOEO Glow Plug Monitor Self-Test: Description
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Ford RV Cutaway, 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
KOER GLOW PLUG MONITOR SELF TEST is a functional test of glow plug system performed on demand with engine running and A/C off. Battery voltage must be maintained at 10-14 volts during this test. If necessary, press accelerator pedal to increase voltage to specified level. PCM will activate Glow Plug Control Module (GPCM) and monitor glow plug circuits. A fault must be present at time of testing for test to detect a fault. DTCs will be sent to PCM on diagnostic line and then output to NGS tester.