Heated Seat System Description

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The heated seat control module controls the battery positive voltage used to supply the seat heater elements. Ignition voltage is supplied to the heated seat switch. When the heated seat switch is in the high or low position ignition voltage is supplied through the on switch signal circuit to the heated seat control module. Voltage to the high/low switch signal circuit is reduced by the resistors within the heated seat switch, high or low seat heater operation is determined by the voltage level to the heated seat control module. The heated seat control module uses the resistance through the heated seat thermistor to regulate the seat temperature. When the heated seat reaches the maximum temperature for high or low operating modes the battery positive voltage supply to the seat heater elements is removed. When the seat cools the resistance value through the heated seat thermistor returns to the limits set for high or low heated seat operation and the heated seat control module provides the battery positive voltage supply to the heated seat element supply circuit.