Heated Seats (Dealer Installed)

Heated Seats Description and Operation (Dealer Installed)

Heated Seat Components

The heated seat system consists of the following components:

* Heated seat switch

* Seat heating control module

* Driver seat cushion heating element

* Driver seat back heating element

* Driver seat cushion temperature sensor

* Passenger seat cushion heating element

* Passenger seat back heating element

* Passenger seat cushion temperature sensor

Heated Seat Operation

Battery positive voltage and ground is supplied to the seat heating control module from the auxiliary power outlet harness connector located under the CD player. This voltage is used to power up the heated seat module and to supply power to the seat heater elements. Battery voltage is supplied to the heated seat switch from the seat heating control module. When a heated seat switch is pressed, battery voltage is applied through the switch contacts and the heated seat switch signal circuit to the seat heating control module indicating the heated seat command. In response to this signal, the seat heating control module applies battery voltage through the control circuit to the seat heater elements.

Temperature Regulation

The seat memory control module/seat heating control module monitors the seat temperature through the temperature sensor signal circuit and the temperature sensor (thermistor) located in the seat cushion with the heater element. The temperature sensor is a variable resistor, it's resistance varies as the temperature of the seat changes. When the temperature sensor resistance indicates to the seat module that the seat has reached the desired temperature, the module opens the ground path of the seat heating elements through the heated seat element control circuit. The module will then cycle the element control circuit open and closed in order to maintain the desired temperature.