Lock-up Control
Shift solenoid valve D controls the hydraulic pressure to switch the lock-up shift valve and lock-up ON and OFF. The PCM actuates shift solenoid valve D and A/T clutch pressure control solenoid valve C ON; lock-up starts. 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 D (2nd, 3rd, 4th, and 5th) and D with sequential shift in M (sequential shift mode) (3rd, 4th, and 5th).