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:
Battery, Mounting and Cables/ Description and Operation
COMPONENT LOCATION
Rear Junction Box (RJB)
Quiescent Current Control Module (QCCM)
Battery Monitoring System (BMS) control module
Primary battery
Gateway Module (GWM)
Central Junction Box (CJB)
Voltage Quality Module (VQM) - vehicles with auto stop/start system only
Starter motor or Tande
Fog Lamps
PRINCIPLES OF OPERATION
For a detailed description of the Fog Lamps, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Exterior Lighting (417-01, Description and Operation).
INSPECTION AND VERIFICATION
CAUTION:
Diagnosis by substitution from a donor vehicle is
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