The heated seat system consists of the following components:

The heated seat switch controls the high an low temperature settings through a rocker switch that is located in the center console. Battery positive voltage is supplied to the switch through the IGN 3 voltage circuit and the DIC/HVAC Fuse located in the I/P fuse block. The heated seat system will operate only with the ignition in the ON position.

The heated seat module controls the flow of battery positive voltage used to heat the seat heating elements. Battery positive voltage is supplied at all times to the heated seat module through the battery positive circuit and the H SET/LUM Fuse located in the I/P fuse block. The heated seat module and the seat heating elements are grounded through the module ground circuit to G301.

When the heated seat switch is placed in the high or low temperature position, battery positive voltage is applied through the heated seat switch signal circuit to the heated seat module. In response to this signal, the heated seat module closes it's contacts and applies battery positive voltage through the heated seat element supply voltage to the heating elements. With the heated seat switch in the high position, battery positive voltage is applied through a 310 ohm resister in the switch and the heated seat high/low signal circuit to the heated seat module. In response to this signal, the module sets the temperature to high heat. When the heated seat switch is placed in the low position, battery positive voltage is applied through a 200 ohm resister in the switch and the heated seat high/low signal circuit to the module. In response to this signal, the module sets the temperature to low heat.

The heated seat system is designed to warm the seat cushion and seat back to approximately 44°C (111.2°F) when in the high heat mode, or 37°C (98.6°F) when in the low heat mode. The heated seat module monitors the seat temperature through the temperature sensor signal circuit and the temperature sensor (thermistor) that is located in the seat cushion. The temperature sensor is a variable resistor, it's resistance changes as the temperature of the seat changes. When the temperature sensor resistance indicates to the heated seat module that the seat cushion has reached the desired temperature, the module opens its contacts to remove voltage from the heating elements. The heated seat module will then cycle the contacts open and closed to maintain the desired temperature.