A method for detecting and identifying modules of a bus system is provided. The bus system includes a control unit, a bus starting from the control unit, and a plurality of modules connected to the bus. The method includes providing a current sink associated with each of the one or more modules. The current sink includes a transistor. The method includes providing a hall sensor associated with each of the one or more modules. The hall sensor detects a current on a low-side data line of the bus. For each one of the one or more modules: when the hall sensor detects a current on the low-side data line, the method includes maintaining a closed position of the transistor; and when the hall sensor fails to detect a current on the low-side data line, the method includes opening the transistor such that current does not flow to the module.