F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
Fuel Injector Driver Module (CNG): Description and Operation
ALTERNATIVE FUEL CONTROL MODULE (AFCM)
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.
