Hydraulic system

A hydraulic system, comprising:

• a hydraulic consumer;
• a first line arrangement;
• a first hydraulic sensor;
• a first electrically operable valve;
• a second electrically operable valve;
• a pressure line;
• a tank line;
• and
• a function diagnostics unit configured to carry out a first test sequence and a second test sequence,
• wherein the first line arrangement connects the hydraulic consumer to the pressure line via the first electrically operable valve and wherein the first line arrangement connects the hydraulic consumer to the tank line via the second electrically operable valve,
• wherein the first hydraulic sensor is disposed in the first line arrangement downstream of the first electrically operable valve as seen from the pressure line and upstream of the second electrically operable valve as seen from the hydraulic consumer,
• wherein a first hydraulic test signal is applied in the first test sequence by actuating the first electrically operable valve for a first time interval, and the function diagnostics unit is configured to receive a measurement signal from the first hydraulic sensor and to compare the measurement signal from the first hydraulic sensor with the first hydraulic test signal, and
• wherein in the second test sequence, a second hydraulic test signal is applied by activating the second electrically operable valve for a second time interval and the function diagnostics unit is configured to receive a measurement signal from the first hydraulic sensor and to compare the measurement signal from the first hydraulic sensor with the second hydraulic test signal.