Moisture sensing in electric motors of motor vehicle steering systems with pull up resistor

A motor vehicle steering system comprising:

• a motor housing;
• an electric motor disposed in the motor housing, the electric motor having at least three phases, wherein the electric motor has a first non-insulated contact point and the motor housing has a second non-insulated contact point, wherein the first and second non-insulated contact points are configured such that water that ingresses into the motor housing electrically connects the electric motor with the motor housing via the first and second non-insulated contact points;
• an inverter that supplies voltages into the electric motor, wherein a high side MOSFET and a low side MOSFET are assigned for each of the at least three phases of the electric motor, the MOSFETS being part of the inverter;
• a pull-up resistor disposed in parallel with one of the high side MOSFETS of one of the at least three phases;
• and
• a measurement unit configured to detect a phase voltage of the one of the at least three phases as being indicative of water present in the motor housing.