Heated Seats - Rear

Rear heated seats are controlled by the heated seat module located under the rear 60 percent seat cushion and a dual momentary switch attached to each rear door panel. When the heated seat switch is pressed, a momentary ground signal is sent to the heated seat module. The heated seat module then supplies voltage to the heater circuit. The seat cushion and backrest heater mats are wired in series and supplied voltage by the same output. The heated seat module monitors input from a temperature sensor, located in each backrest heater mat and maintains seat temperature by cycling output voltage to the heater grids as necessary to maintain the set point temperature. The heated seat module supplies voltage to the appropriate indicator circuit in the heated seat switch. The heated seat module does not time out and remains on until switched off or ignition is OFF.

The heated seat module does not report DTCs and does not communicate on any network. If a fault is detected, the affected seat system is disabled. The faults detected are:

• a heater feed circuit short to battery, ground or open.
• sensor circuit short to battery or open.
• heated seat switch stuck closed to ground.
• heated seat switch low and high inputs shorted together.

A new heated seat module must be configured after installation for correct operation. Heated seat module configuration occurs automatically when the low heat mode button is pressed on either rear heated seat switch. If the heated seat module was not configured correctly, the heated seats cycle through the high, low, and off modes each time the high heat switch is activated. If this happens, the heated seat module must be reset before it can be correctly configured. For additional information Heated Seat Module Reset. After the heated seat module has been reset, the module can be configured correctly by activating the low heat mode switch for either rear heated seat.