Torque Converter Clutch Control Valve Control
WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
LOCK UP CONTROL SYSTEM DIAGRAM
LOCK UP RELEASED
In the lock up released state, the torque converter clutch control valve is set into the unlocked state by the torque converter clutch solenoid and the lock up apply pressure is drained and the torque converter clutch piston release pressure is generated.
In this way, the torque converter clutch piston is not coupled.
LOCK UP APPLIED
In the lock up applied state, the torque converter clutch control valve is set into the locked state by the torque converter clutch solenoid and lock up apply pressure is generated and the torque converter clutch piston release pressure is drained.
In this way, the torque converter clutch piston is pressed and coupled.