Recommended Procedure

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.

To perform self-test, turn ignition off. Ensure test equipment is properly attached. If vehicle is equipped with an auxiliary powertrain control system (RPM control), it must be turned off before performing self-test. Using NGS tester, perform the following steps:

Select VEHICLE & ENGINE SELECTION menu.
Select VEHICLE, YEAR & MODEL.
Select DIAGNOSTIC DATA LINK.
Select PCM - POWERTRAIN CONTROL MODULE.
Select DIAGNOSTIC TEST MODE.
Select RETRIEVE/CLEAR CONTINUOUS DTCs.
Turn ignition on.
Follow operating instructions from NGS tester menu.
Record DTCs and perform appropriate system test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 7.3L DIESEL article. After test has been completed, cycle ignition off before performing other self-tests or driving vehicle. Continuous Memory DTCs must be cleared after repair.

NOTE: If performing repeated self-tests, it may be necessary to disconnect glow plug relay to keep battery from going dead. Ignore any glow plug DTCs while glow plug relay is unplugged.