Natural Gas Alternative Fuel Control Module (AFCM)
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 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 AFCM is on the SCP communication network. The AFCM controls the fuel and ignition systems for better fuel economy, emissions control, failure mode detection and storage. If one of the bus wires becomes shorted to ground or voltage, or if some but not all termination resistors are lost, communications can continue. Check circuits 915 (PK/LB) and 914 (TN/OG) between the AFCM C1009 and the DLC C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open circuit in the SCP network, damage to the DLC C251, damage to the AFCM C1009, or a problem in the inline connector. For additional information, refer to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .