Operation

OPERATION

The heated seat elements resist the flow of electrical current. When battery current is passed through the elements, the resistance of the elements to the current flow is released in the form of heat. The temperature sensor is a Negative Temperature Coefficient (NTC) thermistor. When the temperature of the seat cushion cover rises, the resistance of the sensor decreases. The heated seat module supplies a five-volt signal to one side of each sensor, and monitors the voltage drop through the sensor on a return circuit. The heated seat module uses this temperature sensor input to monitor the temperature of the seat, and regulates the current flow to the seat heating elements accordingly.