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 the shift solenoid valve D and A/T clutch pressure control solenoid valve C ON, and lock-up starts. 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 2nd, 3rd, 4th, and 5th gears in D and S with sequential sportshift mode, and 2nd, 3rd, and 4th gears in S with automatic shift mode.