Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) reset occurs when PCM momentarily "reboots" or is turned off and on while engine running. If condition occurs a single time, engine will momentarily stumble and PCM will go through a normal key on cycle, including turning WAIT TO START light and glow plugs on. It will also attempt to validate accelerator pedal position. If accelerator pedal is not at idle position when fault occurs, pedal authority will not be allowed by PCM until accelerator pedal is released and engine speed returns to idle. This pinpoint test is intended to diagnose following:

Powertrain Control Module (PCM)
Injector Driver Module (IDM)
AP, BARO, CMP, EBP, ETC, ICP & MAP Sensors
Under Valve Cover (UVC) Gasket, Chassis & Engine Harnesses

NOTE: Perform this test only after TESTS 5, 6 and 7 under ENGINE PERFORMANCE DIAGNOSTIC PROCEDURES in SYSTEM & COMPONENT TESTING - 7.3L DIESEL have been performed. This will determine if PCM has detected any fault conditions that can cause a PCM reset.