The invention is related to a method for calibrating a lighting module (1) of an automotive lighting device. Firstly, the lighting module (1) projects a light pattern (2), and some image capturing element (4) acquires the projected light pattern (2). Then, a control centre compares the projected light pattern (2) with an ideal light pattern (5), identifying parameters of scaling, tilting, shearing and/or displacement of the projected light pattern (2) with respect to the ideal light pattern (5). Finally, the control centre corrects the operation of the lighting module (1) with the values of scaling, tilting, shearing and/or displacement. An automotive lighting assembly configured to perform these steps is also provided.