Method for measuring measurement voltages (UMO, UM1, UM2, UM3) in a battery system , comprising a battery module having a plurality of battery cells (B0, B1, B2, B3) connected in series and a measurement circuit for measuring measurement voltages (UMO, UM1, UM2, UM3) produced by the battery cells (B0, B1, B2, B3), wherein each battery cell (B0, B1, B2, B3) is connected in each case to two measurement inputs (P0, P1, P2, P3, P4) of the measurement circuit by means of at least two coupling resistors (RKO, RK1, RK2, RK3, RK4), and wherein the measurement voltages (UMO, UM1, UM2, UM3) are present across measurement sections (M0, M1, M2, M3) which are connected in each case to two measurement inputs (P0, P1, P2, P3, P4), wherein the measurement sections (M0, M1, M2, M3) each comprise a measurement resistor (RMO, RM1, RM2, RM3) which is able to be switched on by means of a switch (S0, S1, S2, S3), wherein the method is characterized by the following steps: a) measuring a first measurement voltage (UM1) across a first measurement section (M1) and a second measurement voltage (UM2) across a second measurement section (M2) with switches (S0, S1, S2, S3) open, wherein the first measurement section (M1) and the second measurement section (M2) are connected to a common measurement input (P1); b) closing a first switch (S1) of the first measurement section (M1); c) opening the first switch (S1) of the first measurement section (M1); d) closing a second switch (S2) of the second measurement section (M2); e) opening the second switch (S2) of the second measurement section (M2); f) comparing the first measurement voltage (UM1) across the first measurement section (M1) with the second measurement voltage (UM2) across the second measurement section (M2), wherein an interruption in a supply line (L0, L1, L2, L3, L4) between the battery module and the measurement circuit is detected if the first measurement voltage (UM1) across the first measurement section (M1) deviates from the second measurement voltage (UM2) across the second measurement section (M2) by a predefined threshold value (W). a) measuring a first measurement voltage (UM1) across a first measurement section (M1) and a second measurement voltage (UM2) across a second measurement section (M2) with switches (S0, S1, S2, S3) open, wherein the first measurement section (M1) and the second measurement section (M2) are connected to a common measurement input (P1); b) closing a first switch (S1) of the first measurement section (M1); c) opening the first switch (S1) of the first measurement section (M1); d) closing a second switch (S2) of the second measurement section (M2); e) opening the second switch (S2) of the second measurement section (M2); f) comparing the first measurement voltage (UM1) across the first measurement section (M1) with the second measurement voltage (UM2) across the second measurement section (M2), wherein an interruption in a supply line (L0, L1, L2, L3, L4) between the battery module and the measurement circuit is detected if the first measurement voltage (UM1) across the first measurement section (M1) deviates from the second measurement voltage (UM2) across the second measurement section (M2) by a predefined threshold value (W). <EOS>