Principles of Operation

PRINCIPLES OF OPERATION - HEATED SEATS

The driver and passenger heated seats share a common ignition feed to the heated seat control switches and have separate grounds to the seat backrest elements. The heated seat control switches are a latching type switch; continuity through the switch will remain whether voltage is supplied to the switch or not until the switch is pressed to place in the OFF setting. When the heated seat control switch is pressed with the ignition switch in RUN or START, voltage is supplied to the bimetallic thermostat that is part of the seat cushion element. The seat cushion element and seat backrest element are wired in series and powered by the same output of the bimetallic thermostat. Each heated seat control switch shows ON and OFF status through its own LED indicator. The heated seat will remain on until the heated seat control switch is pressed and voltage is no longer supplied to the bimetallic thermostat. If the ignition source is removed from the heated seat, the heated seat system will return to the ON with the ignition switch in RUN state until the switch is pressed. The heated seat system is designed to heat the seat to 40°C (104°F) and maintain the temperature by the opening (no voltage to the heated seat elements) and closing (voltage supplied to the heated seat elements) of the bimetallic thermostat.