Torque Converter Clutch Solenoid: Description and Operation

The Torque Converter Clutch (TCC) solenoid is a Pulse Width Modulating (PWM) style solenoid. The PWM solenoid is used to control the apply and release of the bypass clutch in the torque converter. By modulating the pulse width of the TCC solenoid the pressure in the S4 circuit varies modulating the apply and release of the bypass clutch in the torque converter.