Detroit Diesel Electronic Controls System Aftertreatment Control Module (ACM) Transmission Control Module (TCM) The four control modules are connected by a proprietary datalink through which all necessary data and information can be exchanged. Common Powertrain Controller The CPC is typically located in the cab, behind the dash (see graphic below). Figure 7. Common Powertrain Controller The CPC communicates with other control units installed on the vehicle including the MCM, the ACM and the TCM (if equipped) over the data link. Data for specific applications is stored in the CPC. These include idle speed, maximum running speed, and speed limitation.
From this data, instructions are calculated for controlling the vehicle and transmitted to the CPC via the proprietary datalink. Motor Control Module The MCM is located on the left-hand side of the engine (see graphic below). 34 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217