Lock-Up Control

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Fig 1: Lock-Up Control System Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

The system engages the lock-up clutch in the torque converter to eliminate slips in the torque converter. This improves the transmission efficiency. The slip in the lock-up clutch is controlled optimally, thus allowing a comfortable driving.
The lock-up control valve is controlled by the lock-up solenoid valve, and the lock-up solenoid valve is controlled by the signal from the TCM. The lock-up control valve sets the lock-up clutch into a state of engagement, or disengagement.
It inhibits lock-up operation when the fluid temperature is low.