TCC

CONTROL VALVE
This valve switches the fluid passage to the Torque Converter Clutch (TCC) in the torque converter while running at a constant speed with the gear in the 3rd or 4th gear.

When TCC is working, the TCC control solenoid turns ON to allow the hydraulic pressure to be applied to (1) and the valve moves downward.

As a result, the hydraulic pressure applied to (3), passes through the fluid passage in the valve and is applied through (7) to the engagement side of TCC.





MODULATOR VALVE
This valve adjusts the hydraulic pressure which acts on the TCC control valve.

The hydraulic pressure applied to (2) passes through the fluid passage in the valve and enters chamber (A), trying to push the valve to the right.

At the same time, however, as a leftward spring force is working, the hydraulic pressure is adjusted and then transmitted through (1) to the TCC control valve and the TCC control solenoid.





CONTROL SOLENOID VALVE
This valve switches the hydraulic pressure to the TCC control valve. ON and OFF of the power to its solenoid is controlled by Transmission Control Module (TCM).

When the solenoid is ON, as the plunger is pulled up to close the fluid passage, the hydraulic pressure applied to (1) is maintained and the TCC control valve moves down.

When the solenoid is OFF, as the plunger does not move and the fluid passage is open, the hydraulic pressure applied to (1) is relieved and the TCC control valve returns upward by the spring force.