Climate Controlled Seat Operation

The driver and passenger climate controlled seat buttons are selected from the FCIM or FDIM (touchscreen). The FDIM is mounted directly to the APIM. The climate controlled seat system functions independently of the vehicle's climate control system. When the climate controlled seat buttons are pressed on the touchscreen, the APIM sends the request to the GWM using the HS-CAN3. The GWM sends the message to the SCME over the MS-CAN.

When the climate controlled seat buttons are pressed on FCIM, the FCIM sends the request to the SCME using the MS-CAN.

The seat cushion and backrest are each equipped with a blower motor assembly. As cabin air is drawn through each blower motor, the blower motors heat or cool the air, which is then directed into the foam pad where it is distributed along the surface of the cushion and backrest of the seat. Once the system is activated, the SCME uses a set of flexible algorithms to control the heating/cooling modes and the blower speed dependent on the commanded climate controlled seat settings.

The SCME monitors seat cushion temperature while it supplies voltage and ground to both blower motors. The SCME also supplies a variable voltage signal to control the blower speed. Cabin air enters the blower through a filter attached to the blower motor housing. Heated or cooled air exits the blower motor and flows through the foam pad.