When the heated seat switch is pressed to the LOW position, the heated seat temperature sets to low. After you press the heated seat switch to the middle position, the heat seat module stops applying battery positive voltage (B+) to the heating elements. The module also turns off the heated seats whenever the ignition switch is in the OFF position.

In the low position, the seat heats to approximately 37°C (98.6°F). In the high position, the seat heat to approximately 44°C (111.2°F).

The temperature sensor in the seat cushion is a variable resistor called a thermistor. The thermistor regulates to temperature of the seat. The resistance of the sensor varies as the temperature of the seat cushion changes. The heated seat relay module monitors the sensor resistance at the sensor input circuit. The heated seat relay module opens the contacts in order to remove battery positive voltage (B+) from the heating elements under the following conditions:

The heated seat relay module also opens the contacts in order to remove battery positive voltage (B+) from the heating elements under the following conditions:

The heated seat relay module cycles on and off in order to maintain the desired temperature. The system active until one of the following conditions occurs: