Patent ID: 10082205

Abstract:
There is provided an abnormality determining apparatus for a hydraulic circuit of a vehicle including: a torque converter; a hydraulic clutch; a mechanically-driven hydraulic pump (14); an electrically-driven hydraulic pump (16); and a solenoid valve. The abnormality determining apparatus includes an electronic control unit configured to determine which of the electrically-driven hydraulic pump and the solenoid valve has an abnormality, and configured to determine that the electrically-driven hydraulic pump has an abnormality when a turbine speed of the torque converter becomes equal to or higher than a first determination value within a prescribed period of time from rise-up of an engine speed, and determine that the solenoid valve has an abnormality when the turbine speed becomes equal to or higher than a second determination value higher than the first determination value, after a lapse of the prescribed period of time.