Electronic Transmission Control

Electronic Transmission Control

The electronic transmission control module is an integral part of the Mechatronic Module. The electronic inputs are evaluated in the control module and electronic actuation is output to control the shifts and regulate shift quality. The control module is integrated in the E65/E66 electrical system by the PT-CAN bus (power train) connection and a separate data link (hardwire) for signal transfer between components.




In addition to the bus line, the signal transfer between the steering column switch center (SZL) and the transmission control module additionally takes place over a unidirectional serial line (hardwire) for safety reasons. The central gateway module (ZGM) is a link in the data transfer from one bus to another.

The data required for gear shifts are injection timing, engine speed, Valvetronic position, engine temperature and engine intervention. These signals are transmitted between the ECM and transmission control module over the PT-CAN bus.