EPA07 MBE 4000 SERVICE MANUAL Motor Control Module The engine mounted MCM includes control logic to provide overall engine management. See Figure 1. The MCM processes the data received from the CPC, for example the position of the accelerator pedal, engine brake, etc. These data are evaluated together with the data from the sensors on the engine, such as, charge and oil pressure and coolant and fuel temperature. 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. 1. 21–Pin Connector 2.
120–Pin Connector Figure 1 Motor Control Module NOTE: Do NOT ground the MCM. This can result in false codes being logged. Engine Harness The MCM has a 120–pin connector Engine Harness which is factory installed. It also has a 21–pin connector and 31–pin connector which are the responsibility of the OEM. Common Powertrain Controller The CPC has three 18–pin connectors and one 21–pin connector. The following sections contain the connector pin-outs for truck, vocational, transit bus, fire truck, and crane applications. All information subject to change without notice. DDC-SVC-MAN-0026 Copyright © 2011 DETROIT DIESEL CORPORATION 5