Full Lock-up
WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle speed increases, the PCM controls A/T clutch pressure control solenoid valve C to increase the LS C pressure (58). The LS C pressure (58) is applied to the lock-up control valve and the lock-up timing valve, and moves them to the left side. Under this condition, the torque converter back pressure is released fully, causing the torque converter clutch to be fully engaged.
NOTE:
When used, "left" or "right" indicates direction on the hydraulic circuit.