Pad, Heater: Operation

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

Battery current is directed to the heated seat elements by the Comfort Seat and Wheel Module (CSWM). The CSWM will energize the heated seat elements when a heated seat switch is pressed on.

As a Pulse Width Modulated (PWM) current passes through each heated seat element, the resistance of the wire used in the element disperse some of the electrical current in the form of heat. The heat produced by the heated seat element then radiates through the seat bottom and seat back covers, warming the seat covers and its occupant. The seat temperature is controlled/monitored by a signal to the CSWM from a Temperature Sensor thermistor which is part of the seat cushions. There is a thermistor in each heated seat.

The heated seat elements cannot be repaired and must be replaced if inoperative or damaged.