Seat Heating with Seat Module: Notes

When the vehicle wakes up, the junction box electronics determine whether a seat module is installed in the vehicle. It sends a corresponding query via the K-CAN2 for this purpose. The central gateway module transfers the signal to the K-CAN. This allows the seat module to receive the request, respond to it via the K-CAN and take control of the seat heating function.

The seat module has sole responsibility for the seat heating function. The integrated automatic heating and air conditioning system evaluates the button status and sends the button status via the K-CAN to the seat module.

The seat module evaluates the requests for the desired heating stage, as well as controls and monitors the seat heating functions. The seat-heating pads are connected to the seat module. A NTC resistor in the seat-heating pad is monitored to control the temperature.

Depending on the heating stage, the seat module sends the request for the function to be indicated in the button LEDs to the integrated automatic heating and air conditioning system.

The seat module is connected to terminal 30B for the seat-heating load current.

A fault in the seat-heating system results in a corresponding entry in the fault memory of the driver's seat module.