The ECM, if it has electronic functions, handles manual transmissions. For example, the Active Rev Matching in a Corvette matches clutch and engine RPM during shifts using wheel speed data from the traction control system and a shifter position sensor on the transmission....
and TCM. The Engine Control Module, or ECM, directly controls the engine. Still, it can’t do that properly without the Transmission Control Module or TCM and PCM, which work together and exchange information. If there’s a miscommunication, you’ll get a Diagnostic Trouble Code (DTC), one...
A problem in any of these systems, or subsystems, can cause the check engine light to come on. The first step in any diagnosis of the check engine light is to get the computer (PCM or ECM) scanned for codes. Any time this warning comes on, a code is stored in the computer ...