Alternative Fuel Control Module (AFCM)
WARNING: This page is about a different car, the 2004 Ford Pickup Heritage. However, it is still accessible from the selected car via links, so may be relevant.
The alternative fuel control module (AFCM) receives input from sensors and other electronic components (switches, relays). Based on the information received and programmed into its memory, the AFCM generates output signals to control various relays, solenoids and actuators. The AFCM contains a set of drivers for both the gasoline and the alternative fuel injectors. Fuel injector driver signals from the powertrain control module (PCM) are used to control both sets of output drivers in the AFCM. Based on fuel selector switch input the AFCM decides which set of injectors is in use, both on key-up and in fuel switchover situations.