Normal Operation

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Hill Descent Control™ (SVT Raptor only) can be activated by momentarily pressing the Hill Descent Control™ switch at speeds from 3 km/h (2 mph) and 16 km/h (10 mph), but the system stays in control up to 32 km/h (20 mph). At speeds between 32 km/h (20 mph) and 64 km/h (40 mph), Hill Descent Control™ does not set or maintain speeds. Hill Descent Control™ automatically disables itself above 64 km/h (40 mph).

When the Hill Descent Control™ switch is pressed, a circuit inside of the switch is closed, ground is provided to the Instrument Panel Cluster (IPC) disabling or enabling the Hill Descent Control™.

DTC C2809 can be set by manually pressing and holding the Hill Descent Control™ switch for more than 30 seconds.

DTC C2809 (Hill Descent Control Switch Stuck) - this DTC sets if the ABS module receives the HILL_DESC_SW message from the High Speed Controller Area Network (HS-CAN) for greater than 30 seconds.
This pinpoint test is intended to diagnose the following:
Wiring, terminals or connectors
Hill Descent Control™ switch
ABS module