The discharge circuit malfunction diagnosis device configured to diagnose a malfunction of a discharge circuit, which is to be applied to a power supply system including: an assembled battery including a plurality of cells; a discharge circuit which is configured to discharge the each of the plurality of cells when driven; and a voltage adjustment section configured to determine, based on voltages of the respective plurality of cells of the assembled battery, a target cell voltage and a cell to be discharged, and configured to drive a discharge circuit for the cell to be discharged in accordance with the target cell voltage, includes a malfunction diagnosis section configured to compare a discharge circuit pre-driving voltage and a discharge circuit post-driving voltage of the cell to be discharged, to thereby diagnose a malfunction of a discharge circuit corresponding to the cell to be discharged.
展开▼
