Normal Operation and Fault Conditions
WARNING: This page is about a different car, the 2020 Ford Explorer. 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.