Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Torque Converter Clutch Solenoid: Description and Operation
Torque Converter Clutch Solenoid Valve
The Torque Converter Clutch Solenoid valve (TCC Sol valve) is an ON/OFF solenoid that functions in the same manner as the 1-2 shift solenoid valve
and the 2-3 shift solenoid valve. As with the shift solenoids, the PCM provides the ground to command the TCC Sol. valve ON or OFF. The only
difference in operation is that ignition voltage is supplied through the normally closed brake switch to the solenoid.
When the solenoid is OFF, and if the transmission is operating in third or fourth gear, the TCC signal fluid exhausts through the solenoid. When
energized (ON), the exhaust port is blocked. This allows the TCC signal fluid pressure to move the converter clutch valve against the spring force and
the line pressure at the opposite end of the valve.
