Heated seats (certain markets)

Fig 1: Heated Seats

Courtesy of VOLVO CARS OF NORTH AMERICA.

There are heater pads in the cushions and backrests to warm the seats. These are controlled by a control module under the seat. A thermistor on the heater pad detects the heat level.

The information between the control module and the central electronic module (CEM) is transmitted using serial communication. This data contains status information, diagnostic information and signals to control the heat level.

The seat heaters are operated using a switch to the right of the climate control module (CCM). The heat can be set to high or low. These temperatures can be programmed using the diagnostic tool.

There are diagnostics for the seat heaters.