Lock up Control

The torque converter clutch solenoid valve controls the hydraulic pressure to switch the lock up shift valve and lock up ON and OFF. The PCM actuates the torque converter clutch solenoid valve and the A/T clutch pressure control solenoid valve ON, the condition of the lock up starts. The A/T clutch pressure control solenoid valve C regulates and apply the hydraulic pressure to the lock up control valve to control the volume of the lock up.

The lock up mechanism operates in the D5 position (2nd, 3rd, 4th, and 5th), in the D4 position (2nd, 3rd, and 4th), and in the D3 position (2nd and 3rd).

Fig 1: Identifying Lock-Up Control - Functional Diagram (1 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Lock-Up Control - Functional Diagram (2 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.