Hill Descent Control™

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

When the Hill Descent Control™ switch is pressed, a ground signal is sent to the IPC. The IPC sends a message to the ABS module requesting hill descent braking assist. Once the vehicle speed is between 5 km/h (3.1 mph) and 32 km/h (19.9 mph) and the transmission is in REVERSE or any forward gear, the ABS module uses the hydraulic pump motor and the HCU solenoid valves to maintain the vehicle speed set by the driver. If the vehicle speed is increased or decreased outside of the operational window, the system remains active but descent speed cannot be set or maintained.

The Hill Descent Control™ system requires a cool down period after sustained use. The ABS module continually monitors the descent speed, angle of descent, pump motor run time and solenoid valve use. Once the ABS module determines a cool down period is needed, the ABS module sends a message to the IPC over the HS-CAN to alert the driver via a message center message.