Theory Of Operation
WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
The Steering Column Control Module (SCCM) is located near the top of the Steering Column underneath the Steering Wheel. The SCCM includes the Clockspring, the Multi-Function Switch and a LIN/CAN C Gateway. LIN Bus messages received by the LIN/CAN C Gateway are broadcast over the CAN C Bus to the appropriate modules.
The LH Multifunction Switch provides Flash to Pass/Optical Horn Switch signals to the Steering Column Control Module (SCCM). The SCCM sends the requested signal to the Body Control Module (BCM) through the LIN 3 Bus circuit.