Lock-Up Solenoid
WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
The lock-up solenoid (1) is installed in the valve body. It receives control signal from TCM.
The lock-up solenoid operates the lock-up valve inside the valve body and controls the torque converter lockup function.
Courtesy of GENERAL MOTORS CORP.