Temperature Regulation

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

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.