DTC P0743-00: Torque Converter Clutch Circuit Electrical: General Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The PCM activates or deactivates the damper clutch (aka torque converter clutch) by using supplied hydraulic pressure. The main purpose of damper clutch is to reduce fuel consumption by lowering the load on hydraulic pressure device inside of T/C.