Detroit Diesel Troubleshooting Diagrams

Schematic Diagram of DDEC I

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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

Schematic Diagram of DDEC I Schematic Diagram of DDEC I

Written by sam

September 28th, 2011 at 4:12 am

Posted in Fuel System

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