Keep Alive Random Access Memory Reset Procedure
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.
CAUTION:
When battery is disconnected, vehicle computer may lose memory data. Driveability concerns may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting the battery.
Resetting RAM will return PCM memory to its default setting. Adaptive learning contents are included. To clear RAM, disconnect negative battery terminal for a minimum for 5 minutes. After RAM has been reset, DTCs P1000 and P0603 will be stored in PCM.