Distributor Ignition (DI) System
WARNING: This page is about a different car, the 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The profile ignition pickup sensor sends a signal to the powertrain control module indicating the engine rpm and the crankshaft position.