Lock-Up Released
WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
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.