Temperature Sensors

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition is turned to the ON position, the heated and cooled seats initialize in the OFF state. With each activation of the heated or cool seat switch, the requested temperature setting in the following manner: HIGH, LOW, and OFF.

The seat cushion and seat back temperature sensors are each packaged with the seat heater elements. Each seat ventilation heating and cooling module supplies a 5 V reference voltage through the temperature sensor signal circuit and ground through the temperature sensor low reference circuit to the respective seat cushion and seat back temperature sensors. As the temperature of the seat changes, the resistance of the sensor varies changing the feedback voltage of the signal circuit. This voltage varies from 0.5-4 V. The ventilation modules monitor this voltage signal to determine the temperature of the seat so that it can adjust and maintain the seat temperature to the selected switch input.