The heated seat system consists of the following components:

The heated seat control module controls the battery positive voltage used to supply the seat heater elements. The ignition voltage supply circuit provides the operating voltage to the heated seat control module. The heated seat control module supplies a 5 volt reference through resistors and monitors the voltage at the high/low and off switch signal circuits. When the high/low or off switch is pressed the high/low or off switch signal circuit is closed to ground and pulled low, indicating to the heated seat control module the switch status is active. The heated seat control module uses the resistance through the heated seat thermistor to regulate the seat temperature. When the heated seat reaches the maximum temperature for high or low operating modes the battery positive voltage supply to the seat heater elements is removed. When the seat cools the resistance value through the heated seat thermistor returns to the limits set for high or low heated seat operation and the heated seat control module provides the battery positive voltage supply to the heated seat element supply circuit.