Diagnostic Aids
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.
Perform this test when directed by QUICK TEST. This test is only intended to diagnose the following components and circuits.
- Fuel Pump Relay
- Inertia Fuel Shutoff (IFS) Switch
- Warning Light
- Wiring Harness Circuits (FPC & FPM)
- PCM
Fuel Pump Control (FPC) circuit from PCM is used to energize fuel pump relay. With ignition on, fuel pump relay is energized for 20 seconds and whenever engine RPM is detected. Fuel Pump Monitor (FPM) circuit is downstream of Inertia Fuel Shutoff (IFS) switch and is used by PCM to monitor voltage going to fuel pump.