Theory Of Operation
WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Heated Steering Wheel (HSW) Temperature Sensor is connected to either the Left or Right Steering Wheel Switch depending on vehicle configuration. The sensor data is transferred from the Steering Wheel Switch to the Steering Column Control Module (SCCM) by way of the LIN bus, a serial sub-bus. The data is then transferred to the BCM and HSM by way of the CAN bus.