TUCSON(LM) >2013 > G 2.4 DOHC > 4 Wheel Drive (4WD) System > Coupling Assembly > Pressure Sensor>Description and Operation  
Description
The 4WD ECU makes a Motor Pump(Actuator) turn round for generating an oil pressure. And then it presses a multiple disk clutch and transfers the generated torque into rear wheels. Its torque value varies according to a pressure status.