Method for determining a position coordinate of a mobile unit having a first coil, wherein the mobile unit is arranged movably relative to an immovably arranged second coil, wherein the first coil has two sub-windings (X, Y), wherein the second coil also has two sub-windings (A, B), wherein the respective sub-windings of the first and second coil can each be actuated separately by a respective controllable switch arrangement, wherein the following method steps are carried out to determine the position of the first coil relative to the second coil: - determining the respective inductive coupling strengths of either a particular sub-winding (X, Y) of the first coil or the first coil to either a particular sub-winding (A, B) of the second coil or the second coil by supplying an AC voltage signal to the circuit arrangement of the first coil and measuring the AC voltage signals induced in the sub-windings of the second coil for the corresponding switch positions of the respective switch arrangements, - determining the respective phases of the induced AC voltage signals for the corresponding switch positions, - determining a phase shift between the phase of an AC voltage induced when a single sub-winding (X, Y) of the first coil is coupled to a single sub-winding (A, B) of the second coil and the phase of the AC voltage induced when the series circuit of the sub-windings of the first coil is coupled to the series circuit of the sub-windings of the second coil, - generating a pattern from the time sequence, resulting from the various switch positions, of the inductive coupling strengths determined in the respective switch positions, - generating features of the pattern, wherein the features are relationships of one detected coupling strength with a different detected coupling strength, - comparing the features of the generated pattern with corresponding features of patterns that are characteristic of a particular position range, wherein in each position range the phase shift is a biunique function of the position, - determining the position range from the comparison, - determining the position of the first coil within the position range from the phase shift. - determining the respective inductive coupling strengths of either a particular sub-winding (X, Y) of the first coil or the first coil to either a particular sub-winding (A, B) of the second coil or the second coil by supplying an AC voltage signal to the circuit arrangement of the first coil and measuring the AC voltage signals induced in the sub-windings of the second coil for the corresponding switch positions of the respective switch arrangements, - determining the respective phases of the induced AC voltage signals for the corresponding switch positions, - determining a phase shift between the phase of an AC voltage induced when a single sub-winding (X, Y) of the first coil is coupled to a single sub-winding (A, B) of the second coil and the phase of the AC voltage induced when the series circuit of the sub-windings of the first coil is coupled to the series circuit of the sub-windings of the second coil, - generating a pattern from the time sequence, resulting from the various switch positions, of the inductive coupling strengths determined in the respective switch positions, - generating features of the pattern, wherein the features are relationships of one detected coupling strength with a different detected coupling strength, - comparing the features of the generated pattern with corresponding features of patterns that are characteristic of a particular position range, wherein in each position range the phase shift is a biunique function of the position, - determining the position range from the comparison, - determining the position of the first coil within the position range from the phase shift.