Heated Seats - Rear

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles equipped with rear heated seats are equipped with a single-heated seat module to control both rear heated seats. The heated seat module is located under the rear 60 percent seat. When the heated seat switch is pressed with the ignition switch in RUN, a momentary ground signal is sent to the heated seat module. The heated seat module then supplies power to the heater circuit. The cushion heater mat and seat backrest heater mat are wired in series and powered by the same output. The heated seat module monitors inputs from a temperature sensor, located in each seat's cushion heater mat and maintains seat temperature by cycling the heater feed output as necessary to maintain the set point temperature. The heated seat module also will send voltage to 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 for that circuit that is currently on and receives a second momentary ground signal or the ignition switch is set to OFF.

If a fault is detected by the heated seat module, the module will stop supplying power to that individual left or right seat and switch indicator, that the fault was detected on. The faults detected will be: a heater feed circuit short to battery, ground or open; sensor circuit short to battery or open; heated seat switch stuck closed to ground or heated seat switch low and high inputs shorted together. To reset the module, cycle the ignition switch OFF and then ON. After the heated seat module has been reset, the module will return to an OFF state. The heated seat module does not report diagnostic trouble codes (DTCs) and does not communicate on any of the controller area networks (CANs).