To connect the transmission and the engine, a system that couples the fluid in the internal part of the Torque Converter Clutch (TCC) is used. This multiplies the engine torque so that both the input speed of the transmission and the engine revolutions are the same.
The torque converter clutch is equipped with solenoid valves that receive commands from the Powertrain Control Module (PCM), which indicates the direction of the hydraulic fluid, thus activating the clutch.
The P2770 OBD2 fault code setting occurs when voltages exceeding the allowable range are detected in the TCC circuit, thus causing a high voltage.