The driver and front passenger heated seat systems each consists of the following components:

The heated seat system will operate any time the ignition is the RUN position. The heated seat switch controls the OFF or temperature settings to low or high.

Ignition voltage is supplied to the heated seat switches from the HTD Seats 10 A fuse only with the ignition in the RUN position. Battery voltage is supplied to the heated seat modules from the HTD Seats 20 A fuse at all times. Ground is supplied to the heated seat switches and modules from G301.

The driver and front passenger seats are heated using electric heater elements located in the seat cushions and seat backs. Battery positive voltage to the heater elements is controlled by the heated seat modules using inputs from the heated seat switches and the heated seat thermistors. When the heated seat switch is in the high or low position, voltage is supplied through the heated seat high/low signal circuit to the heated seat module. Voltage to the high/low signal circuit is reduced by the resistors within the heated seat switch to signal the heated seat module that a high or low temperature setting is requested. Voltage to the high/low signal circuit from the heated seat switch is removed to request the off setting.

The heated seat module monitors the seat temperature through the temperature sensor (thermistor) that is located in the seat cushion. The temperature sensor is a variable resistor, its resistance changes as the temperature of the seat changes. When the temperature sensor resistance indicates to the heated seat module that the seat has reached the desired temperature, the module will cycle supply voltage as necessary to the seat heating element in order to maintain the desired temperature.