Normal Operation and Fault Conditions
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The mode select switch is used to activate and deactivate the snow/sand mode feature. When the driver presses the mode select switch, the HVAC module receives a ground signal from the switch. The HVAC module sends a mode select switch message to the ABS module over the HS-CAN 2 and the ABS module takes the necessary action depending on the switch inputs.