An integrated controller calculates required driving force on the basis of accelerator opening, calculates torque capacity of the clutch, required for transmitting the required driving force by the clutch, as target torque capacity, calculates actual torque of the engine and actual torque of the motor, calculates a torque deviation as a deviation between the target torque capacity and a sum of the actual torque of the engine and the actual torque of the motor, and determines occurrence of an engagement failure of the clutch when the torque deviation becomes greater than a first fault determination value during the wet start clutch control.