SERIES 60 SERVICE MANUAL DDEC III/IV (Series 60G Engine) The DDEC III/IV ECM receives electronic inputs from sensors on the engine and vehicle, and uses the information to control engine operation. Fuel is controlled by DDEC. See Figure 6. Figure 6 Schematic Diagram of DDEC III/IV (Series 60G Engine) Portable equipment facilitates access to diagnostic capabilities of DDEC III/IV's. The Diagnostic Data Reader (DDR) requests and receives engine data and diagnostic codes. This equipment provides many unique capabilities including cylinder cutout, printer output, and data snapshot. The DDR also provides limited programming capability. (Rev. 2005) All information subject to change without notice.
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