Torque Converter Clutch (TCC) Electrical Controls

The torque converter clutch (TCC) system uses controls that are internal as well as external to the transmission. Internal components of the TCC system include:
1. TCC Solenoid Assembly - Energizes to redirect transmission fluid to the converter clutch control valve in the fluid pump assembly.
2. Fluid Pump Assembly - Contains the TCC control valve. The TCC control valve determines the method of fluid feed to the torque converter assembly in order to enable or disable the clutch mechanism.
3. TCC Control Valve - Houses the TCC solenoid assembly.

The external control components of the TCC system include:
1. Stoplamp Switch - To avoid stalling the engine when braking, the converter clutch is released any time the brakes are applied.
2. Powertrain Control Module (PCM) - Is an electronic component that controls gear shift and idle - up according to the signals from each sensor. It receives input signals and controls the operation of the solenoid valves that apply the clutch mechanism when proper operating conditions are met.
3. Throttle Position (TP) Sensor - Sends throttle position information to the powertrain control module.
4. Vehicle Speed Sensor (VSS) - Sends vehicle speed information to the powertrain control module.
5. Engine Coolant Temperature (ACT) Sensor - Sends engine coolant temperature information to the powertrain control module.
6. Cruise Control Module (If equipped) - Sends cruise control information to the powertrain control module.