Heated seats (Discovery 3)

Front seat heating switches

Front seat heaters are available for both manual and power-operated seats. The heaters are controlled by the Automatic Temperature Control Controller (ATCM).

When the heating system is turned on, electrical power is supplied to the heating elements built into the seat, and the seats are heated. To maintain a constant temperature, the ATCM controller, using a sensor built into the seat cushion, measures the temperature inside the seat and regulates the voltage to the heating elements. For more information, refer to Control Components (412-04 Control Components)

Rear seat heating switches

NOTE: Model shown with rear air conditioning

The left and right rear seats are equipped with three heating elements: in the cushion, in the backrest and in the knee bolster. The optional child seat also has a built-in heating element.

NOTE: The center rear seat is not heated.

The front seats can be heated when the ignition is on (II) and one of the two possible heating modes is selected. When the rear seat heating switch is first pressed, the ATC controller switches to the maximum heating mode and supplies power to the heating elements of the corresponding seat (right or left). At the same time, two yellow LED indicators light up in the switch. When the switch is pressed a second time, the ATC controller sets the heating temperature to low, and one of the LEDs goes out. A third press of the switch turns off the heating, and the second LED also goes out. The seat heaters remain on until they are turned off with the switch, or until the ignition is turned off.

The rear seat heating controller receives signals from the temperature sensors in the right and left seats and regulates the power supply to the heating elements, maintaining the set seat temperature in the range of 35-45°C. The actual temperature depends on the type of seat upholstery, since the thermal characteristics of the seats are determined by the materials used.