Heated Seats - Rear

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 attached to the rear seat backrest frame. The heated seat switch buttons are located in the rear panel of the front floor console. 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 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 setpoint temperature. The heated seat module 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 switched off or the ignition is set to OFF. The heated seat module does not time out.

The heated seat module does not report DTCs and does not communicate on any network. If a fault is detected the affected seat system will be disabled. 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.
• heated seat switch low and high inputs shorted together.

To reset the module, cycle the ignition 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 DTCs and does not communicate on any communication network.

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. Until the module is correctly configured, the heated seats will operate incorrectly from the high heat mode button on either heated seat switch by following a sequence of high, low and off with each button press. After the low heat mode button is pressed on either heated seat switch, the module will correctly configure and the system will operate correctly.