Seating - 1st Row - Heated
Seating - Heated
Overview
This system allows independent seat electrical heating of each front seat on demand.
The components of the system are:
- seat heater mats (located on the seat cushion and backrest).
- the HVAC (Heating, Ventilation, and Air Conditioning) module.
- heated seat buttons (located on the touchscreen interface).
Remote Start Climate Operation (if equipped)
The customer can select different climate control modes/preferences when the vehicle is started using the remote start feature. This can be accessed through the message center. For additional information on how to set the remote start preferences, refer to the Owner's Literature. When the driver seat and/or passenger seat is set to AUTO mode, the driver/passenger heated/climate controlled seat activates in full heat mode when the outside temperature is less than 0 C (32 F) and full cool mode (climate controlled seats only) when outside temperature is greater than 26.7 C (80 F) any time the vehicle is started using the remote start feature. No heated/climate controlled seat adjustments are recognized during remote start operation. Once the ignition is cycled to the ON position, the heated/climate controlled seat returns to the previous settings (last ignition ON cycle) and adjustments can be made normally. If the previous setting was off, the heated/climate controlled seat turns off.
System Operation
System Diagram
Network Message Chart
HVAC (Heating, Ventilation, and Air Conditioning) Module Network Input Messages
APIM (Accessory Protocol Interface Module) Network Input Messages
The driver and passenger heated seat buttons are selected from the touchscreen interface. When the heated seat button is pressed on the touchscreen interface, the APIM (Accessory Protocol Interface Module) sends the request message to the FCIM (Front Controls Interface Module) over the I-CAN (Infotainment Controller Area Network). When a heated seat request message has been received from the APIM (Accessory Protocol Interface Module), the FCIM (Front Controls Interface Module) sends the request message to the IPC (Instrument Panel Cluster) over the I-CAN (Infotainment Controller Area Network). The IPC (Instrument Panel Cluster) sends the message to the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network). The message is then sent to the HVAC (Heating, Ventilation, and Air Conditioning) module over the MS-CAN (Medium Speed Controller Area Network). Upon receiving the request, the HVAC (Heating, Ventilation, and Air Conditioning) module supplies voltage to the appropriate driver and/or passenger seat cushion and backrest heater mats.
Heated Seats
The driver and passenger heated seat control buttons and indicators are located on the touchscreen interface ( FDIM (Front Display Interface Module)). The FDIM (Front Display Interface Module) is mounted directly to the APIM (Accessory Protocol Interface Module). The heated seat system functions independently of the vehicle's climate control system. Each time the heated seat button is pressed, the APIM (Accessory Protocol Interface Module) sends the request to the FCIM (Front Controls Interface Module) using the I-CAN (Infotainment Controller Area Network). The FCIM (Front Controls Interface Module) sends the message to the IPC (Instrument Panel Cluster) using the I-CAN (Infotainment Controller Area Network). The IPC (Instrument Panel Cluster) sends the request message to the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network). Finally, the BCM (Body Control Module) sends the request to the HVAC (Heating, Ventilation, and Air Conditioning) module which decreases one setting (the sequence is high, low, off, high, etc.).
When activated, the HVAC (Heating, Ventilation, and Air Conditioning) module supplies voltage to the selected seat's heater circuit. Each seat's cushion heater mat and backrest heater mat is connected in a series circuit to the HVAC (Heating, Ventilation, and Air Conditioning) module and powered by the output circuit for that seat. The HVAC (Heating, Ventilation, and Air Conditioning) module monitors inputs from a temperature sensor located in each seat's cushion heater mat, and maintains seat temperature by cycling the heater circuits on/off. The heated seat remains ON until the heated seat switch button is pressed to cycle the HVAC (Heating, Ventilation, and Air Conditioning) module OFF or the ignition is set to OFF.
If a fault is detected by the HVAC (Heating, Ventilation, and Air Conditioning) module, the module stops supplying voltage to that individual left or right seat that the fault was detected on until the ignition is turned OFF and then ON.
Component Description
Front Display Interface Module (FDIM)
The FDIM (Front Display Interface Module) (touchscreen) contains the heated seat control buttons. For additional information, REFER to Front Display Interface Module (FDIM) Information and Entertainment Systems - Premium Plus (if equipped with Premium Plus) or REFER to Front Display Interface Module (FDIM) Information and Entertainment Systems - Sony Sound (if equipped with Sony(R) Sound).
Heater Mat
The cushion and backrest heater mats are connected in series. The cushion heater mat is equipped with a temperature sensor.