Circuit/System Description

The driver and passenger heated seats are controlled by separate heated seat switches located in the HVAC controls. When a heated seat switch is pressed, a serial data message is sent from the HVAC controls to the HVAC control module. The HVAC control module serves as a gateway to transmit the message to the seat memory control module via the serial data line indicating the heated seat command. In response to this message, the seat memory control module then applies battery voltage through the element supply voltage circuit to the appropriate seat heating elements. The seat memory control module then sends a serial data message back to the HVAC control module to gateway the information to the HVAC controls to either illuminate or turn off the appropriate temperature indicator.