Recommended Procedure:

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Connect the diagnostic tool. Turn off all accessories. If the vehicle is equipped with a power take-off (PTO) system or auxiliary idle control, it must be turned off to carry out self-tests.

Carry out the necessary vehicle preparation and a visual inspection. Refer to QUICK TEST OPERATION .
Refer to the diagnostic tool operating manual for instructions.
Key on, engine off.
Follow the operating instructions from the menu.
Record the continuous DTCs and freeze frame information from the PCM and TCM and refer to the appropriate pinpoint test for continuous DTC diagnostics.
Continuous DTCs must be cleared after a repair is made.