Lock-up Control
Shift solenoid valve E controls the hydraulic pressure to switch the lock-up shift valve and lock-up ON and OFF. The PCM actuates shift solenoid valve E and A/T clutch pressure control solenoid valve A to control the torque converter clutch lock-up. When shift solenoid valve E is turned ON, the condition of lock-up starts.
A/T clutch pressure control solenoid valve A regulates and applies hydraulic pressure to the lock-up control valve to control the amount of lock-up.
The lock-up mechanism operates in 2nd, 3rd, and 4th gears in the D position, and 3rd gear in the D position over drive off mode.