Four High Side Driver Outputs (2 Right and 2 Left Bank)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The high side driver output function is to distribute energy to the correct bank based on a camshaft position output (CMPO) signal, and provide regulated current to the injectors. The powertrain control module (PCM) commands the fuel quantity and the fuel injection control module (FICM) controls the duration of the injection event.