Method and system for identifying operating states of a vehicle, and a vehicle which comprises such a system

A method for detecting an operating state of a vehicle (100), wherein an operating state is selected from at least a first operating state (26.1) or a second operating state (26.2), and wherein the vehicle (100) includes a pneumatic brake system (52.1) and a pneumatic control connection (53), designed for connecting the pneumatic brake system (52.1) to a further pneumatic brake system (52.2) of a trailer (200), the method comprising the following steps:

• applying (21) pressure to the control connection (53) until a starting pressure (21.1) in the control connection (53) is set;
• opening (22) the control connection (53) such that a pressure between the control connection (53) and an environment is equalized;
• detecting (23.1) a temporal pressure pattern (DV) during the pressure equalization;
• comparing (24) the temporal pressure pattern (DV) to a reference pressure pattern (RDV);
• determining (25) an evaluation result (25.1) based on the comparison (24) of the temporal pressure pattern (DV) and the reference pressure pattern (RDV);
• and
• assigning (26) the evaluation result (25.1) to the first or the second operating state (26.1, 26.2) of the vehicle (100).