Heated Seats

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles equipped with front heated seats are equipped with a single-heated seat module to control both front heated seats. The heated seat module is located on the passenger seat track. The HVAC module includes both driver and passenger heated seat control buttons and indicators. The heated seat system will function independently of the vehicle's climate control system. A momentary ground signal is transmitted to the heated seat module when a heated seat switch button on the HVAC module is depressed and ignition switched voltage is supplied. Upon receiving each control signal to an input circuit, the heated seat module will decrease one setting (the sequence is HI, LOW, OFF, HI, etc.). When a heated seat is set to HI, both LED indicators above that heated seat's control button will illuminate. When a heated seat is set to LOW, only one LED indicator above that switch will illuminate. When activated, the heated seat module supplies voltage to the selected seat's heater circuit. Each seat's cushion heater mat and backrest heater mat is connector in a series circuit to the heated seat module and powered by the output circuit for that seat and ground. The heated seat module monitors inputs from a temperature sensor, located in each seat's cushion heater mat and maintains seat temperature by regulating current flow to the heater circuits. The heated seat module will remain ON until the heated seat switch button is depressed to cycle the heated seat module OFF. If ignition voltage is switched OFF, the heated seat module will enter an OFF state.