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Pressure regulator 3
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Pressure regulator 2
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Pressure regulator 1
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Discharge port
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Suction port
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Turbine speed sensor
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Main control valve body
Transmission Electronic System The transmission control module (TCM) and its input/output network control the following transmission operations: shift timing. line pressure (shift feel). torque converter clutch. In addition, the TCM receives input signals from certain transmission-related sensors and switches. The TCM also uses these signals when determining transmission operating strategy.
Using all of these input signals, the TCM can determine when the time and conditions are right for a shift, or when to apply or release the torque converter clutch. It will also determine the pressure needed to optimize shift feel. To accomplish this the TCM uses six pressure control solenoids and one shift solenoid to control transmission operation.
The following provides a brief description of each of the sensors and actuators used to control transmission operation. TCM The TCM for the transmission is mounted on top of the main control valve body. The control module for the transmission has been designed to operate correctly in the environment in which the TCM is located.
The transmission control module is activated and deactivated by the ignition supply and is connected to the transmission link harness by a 16-way connector.
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