SCP Communication Network
WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The powertrain control module (PCM) (12A650) is on the SCP communication network. The PCM controls the engine for better fuel economy, emissions control and failure mode detection and storage.
The natural gas vehicle module (NGVM) is on the SCP communication network.
The NGVM has separate injector drivers to run the injectors at the higher operating pressure of natural gas. The NGVM does not perform any calculations for this function; calibration for the injections is maintained in the PCM.