Editing Ford EEC-V DPC Electronic Engine Control System (section)

== Overview ==
Starting in 1994 Ford branded light duty truck class vehicles equipped with 7.3L Powerstroke engines were fitted with Ford's in-house designed EEC-V engine management system. A special variant only found in 7.3L equipped vehicles called DPC, or Diesel Powertrain Control. These variants had completely different firmware, binary sizes, routines, and IO mappings as well as very different IO drivers. The EEC-V systems use propriety micro-controllers that appear to be iterations on the original Intel 8065-like processors used in the EEC-IV earlier models used until 1994. This is largely an assumption based on disassembly of the firmware binaries pulled off running vehicles. These modules are referred to as PCM, or Powertrain Control Modules as the single device runs the firmware routines for controlling many central parts of the vehicle including, engine, emissions, transmission, and communications to all other independent modules. 

==== OBD II Support ====
Starting in 1996 all vehicles sold in the United States were required to be equipped with the OBD II communications and diagnostic protocol. Ford EEC-V vehicles were wired with a DLC (data link connector) but did not function with OBD II until 1996 when firmware updates were released to enable the communications. Most 1994 variants can run later (up to 1997) official firmware variants with the same hardware identifiers and achieve the upgrade. This means, as far as aftermarket reverse engineers have discovered, there are little to no known hardware differences between the devices sold in this such that later firmware can be run mostly without issue.