Land Rover Discovery: Hill descent control (HDC)
Land Rover Discovery (2009–2016) Owner's Manual / Hill descent control (HDC)
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HDC Controls
Hill Descent Control (HDC) is designed to
restrict the vehicle's speed to a set limit
when travelling downhill
Do not attempt a steep descent
if HDC is inoperative or warning
messages are displayed.
Gradient release control (GRC)
With Hill Descent Control (HDC) activated,
if the vehicle is stopped on a slope using
the brake pedal, GRC will become active
(except in the Terrain response system's
Sand program). During a hill asce
Wade sensing
WADE SENSING CONTROLS
Wade sensing should not be used
during off-road driving as rapid
increases in water depth cannot
be detected in time to deliver a
warning message to the driver.
When enter
SEE MORE:
Parking Brake and Actuation - Operation
Operation
When the park brake is applied with the EPB switch, the ABS control
module uses the wheel speed inputs to determine when to use the static
and dynamic modes of operation. It uses the static mode at vehicle speeds
up to 3km/h (2mph) and the dynamic mode at vehicle speeds greater than
3km/h
Rear Drive Unit
(RDU)/ Description
Drive flange
Mounting bracket
RDU pump
All Wheel Drive (AWD) valve block oil filler plug
AWD Valve block
PTU synchroniser piston pressure line P4
PTU synchroniser piston pressure line P3 including pressure damper
Left RDU clutch pressure line P2
Right RDU clutch pressure line P1
RDU oil
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