Transaxle Control Module (TCM)

The microprocessor that controls operation of the electronically controlled continuously variable transaxle (CVT) is called the TCM. The TCM receives a variety of CAN messages and hardwired signals from modules connected to the CAN network. Based on information received, the TCM makes a decision on how to control the operation of the generator motor or the traction motor. In case of a malfunction the TCM is able to detect and store the appropriate diagnostic trouble code (DTC). To retrieve DTCs from the TCM, an on-demand and continuous memory self-test must be carried out.