This system utilizes an engine mounted EDU and a cab mounted ECM, which has a replaceable Programmable Read-Only Memory (PROM). The EDU functions as the high current switching unit for the actuation of the injector solenoids and is fuel-cooled.
The DDEC I ECM is a microprocessor. It is the control center of the DDEC I system.
The DDEC I ECM is packaged in a die-cast aluminum housing with sealed connectors.
The DDEC I system consists of the following:
- The DDEC I ECM
- A replaceable PROM
- Connections to various engine sensors, operational displays, power and fuel injectors
