MBE 900 ENGINE 2007 OPERATOR'S GUIDE The data is then compared to the characteristic maps or lines stored in the MCM. From these data, quantity and timing of injection are calculated and the unit pumps are actuated accordingly through the solenoid valves. NOTE: To obtain a replacement MCM, all the data given on the MCM label are required. The MCM data label has the 10 digit engine serial number. Common Powertrain Controller Figure 19 CPC The CPC receives data from the following sources: The CPC communicates with any other MCM unit installed on the vehicle over the J1939 data link. See Figure 19.
The operator (accelerator pedal position, engine brake switch) Data for specific applications is stored in the CPC. These include idle speed, maximum running speed, and speed limitation. Other electronic control units (for example, the anti-lock brake system) The MCM (oil pressure and coolant temperature) From these data, instructions are computed for controlling the engine and transmitted to the CPC via the proprietary datalink. The CPC controls various systems, for example, communications with the datalink, the engine brake, and the constant-throttle valves. All information subject to change without notice. (Rev. 04/08) 41 DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION