Full Lock-up

• Lock-up Control Solenoid Valve A: ON
• Lock-up Control Solenoid Valve 8: ON
• Linear Solenoid Pressure: High

When the vehicle speed further increases, the linear solenoid pressure is increased to high, in accordance with the linear solenoid controlled by the PCM.

The lock-up timing valve overcomes the spring force and moves to the left side. Also, this valve closes the fluid port leading to the left side of the lock-up control valve.

Under this condition, the modulator pressure in the left side of the lock-up control valve had already been released by the lock-up control solenoid valve B; the lock-up control valve is moved to the left side. As this takes place, the torque converter back pressure is released fully, causing the lock-up clutch to be engaged fully.

Fig 1: Lock-Up System Diagram (Full Lock-Up)

Courtesy of AMERICAN HONDA MOTOR CO., INC.