Full Lock-up
When the vehicle speed increases, the PCM sends a signal to the A/T clutch pressure control solenoid valve C to increase 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, torque converter back pressure (F2) is released fully, causing the torque converter clutch to be fully engaged.
Note. When used, "left" or "right" indicates direction on the hydraulic circuit.
