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MODULE-TRANSMISSION CONTROL DESCRIPTION The Transmission Control Module (TCM) is a sub- OPERATION The Transmission Control Module (TCM) controls all electronic operations of the transmission. The TCM receives Some examples of direct inputs to the TCM are: • Battery (B+) voltage • 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 Some examples of indirect inputs to the TCM are: • Engine/Body Identification • Manifold Pressure • Target Idle • Torque Reduction Confirmation • Engine Coolant Temperature • Ambient/Battery Temperature • Scan Tool Communication 8E - 180 ELECTRONIC CONTROL MODULES - SERVICE INFORMATION ND |