Lock-up Control

Shift solenoid valve D controls the hydraulic pressure to switch the lock-up shift valve and lock-up ON and OFF When the PCM actuates shift solenoid valve D and A/T clutch pressure control solenoid valve C ON, lock-upstarts A/T clutch pressure control solenoid valve C applies and regulates hydraulic pressure to the lock-up control valve to control the amount of lock-up

The lock-up mechanism operates in D (2nd, 3rd, 4th, and 5th gears) and S with sequential sportshift or automatic shift models (2nd, 3rd, and 4th gears)

Fig 1: Lock-Up Control Communication Diagram

Courtesy of AMERICAN HONDA MOTOR CO., INC.