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TRANSMISSION CONTROL MODULE DESCRIPTION The Transmission Control Module (TCM) is located in the engine compartment on the right (passenger) OPERATION The TCM is the controlling unit for all electronic operations of the transmission. The TCM receives Some examples of direct inputs to the TCM are: • Ignition “ON” voltage • Transmission Control Relay (Switched B+) • Throttle Position Sensor • Crankshaft Position Sensor • Transmission Range Sensor • Pressure Switches • Transmission Temperature Sensor • Input Shaft Speed Sensor • Output Shaft Speed Sensor • Line Pressure Sensor are: • Engine/Body Identification • Manifold Pressure • Target Idle • Torque Reduction Confirmation • Engine Coolant Temperature • Ambient/Battery Temperature • DRB Scan Tool Communication ious inputs, the TCM determines the appropriate Some examples of TCM direct outputs are: • Solenoids Fig. 25 Reaction Planetary Geartrain 21 - 346 45RFE AUTOMATIC TRANSMISSION DN DESCRIPTION AND OPERATION (Continued) |