Principles of Operation

PRINCIPLES OF OPERATION

Heated Seats
Vehicles equipped with front heated seats are equipped with a heated seat module which controls both front heated seats. The heated seat module is located behind the front passenger door trim panel.

Vehicles equipped with rear heated seats are equipped with two rear heated seat modules, one for the left rear heated seat and the other for the right rear heated seat. Each rear heated seat module is located underneath the respective rear seat backrest trim cover.

The functionality of both the front and rear heated seat systems is similar. When the heated seat switch is pressed with the ignition switch in RUN, a momentary voltage signal is sent to the heated seat module. The heated seat module then supplies power to the heating element circuit. The cushion element and seat backrest element are wired in series and powered by the same output. The heated seat module also will ground the separate indicator circuit at the heated seat switch to indicate an ON state. The heated seat module will remain on until the heated seat switch is pressed and a momentary voltage signal is received, or until 10 minutes expire. If the ignition source is removed from the module, the heated seat module will enter an OFF state and will not return to ON until the switch is once again pressed with the ignition switch in RUN. The heated seat module is designed to heat the seat to 37.5°C (99.5°F) and maintain the temperature until time-out or switched off. This temperature is maintained by the heated seat module monitoring the temperature sensor located in the seat cushion element, and adjusting the current flow to the heating elements.