Control Module: Description and Operation: Overview

Transmission Electronic Control System

OVERVIEW
The TCM (transmission control module) is an integral part of the Mechatronic valve block which is located at the bottom of the transmission, within the fluid pan. The TCM (transmission control module) is the main controlling component of the transmission.
The TCM (transmission control module) processes signals from the transmission speed and temperature sensors, ECM (engine control module) and other vehicle systems. From the received signal inputs and pre-programmed data, the module calculates the correct gear, torque converter clutch setting and optimum pressure settings for gear shift and lock-up clutch control.
Unlike previous transmissions, this application has a fully electronic, JaguarDrive selector with no Bowden cable connection to the transmission. The transmission selections are made using a rotary JaguarDrive selector which rises from the floor console once the engine is running. Rotation of the JaguarDrive selector to any of the 5 positions is sensed by the TCM (transmission control module) which reacts according to the selected position.
Another new feature is the electronic park lock which is controlled by the TCM (transmission control module). A mechanical link is fitted for emergency park release in the event of an electrical failure.