2012-2019 Volvo V40 4 Door STARTING AND DRIVING -> Hill Descent Control (HDC) User Manual
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STARTING AND DRIVING -> Hill Descent Control (HDC) for Your Volvo V40 4 Door Second Generation (2012-2019)

STARTING AND DRIVING  
All Wheel Drive 6 (AWD)*  
All-wheel drive, (AWD – All Wheel Drive), means  
that the car is driving all four wheels at the same  
time, which improves traction. All-wheel drive is  
always engaged.  
Hill Descent Control (HDC)8  
Related information  
•
Hill Descent Control (HDC) (p. 289)  
HDC is a low speed function with enhanced  
engine braking. The function makes it possible  
to increase or reduce the car's speed on steep  
downhill gradients using only the accelerator  
pedal, without using the foot brake.  
General information on HDC  
When you release the accelerator on downhill  
gradients the car is normally braked by means of  
the engine striving for low engine idling speeds,  
so-called engine braking. But the steeper the  
roadway and the more load in the car, the faster  
the car coasts despite engine braking - the HDC  
function compensates for this with automatic  
brake intervention.  
HDC makes it possible to increase or reduce  
your speed on steep downhill slopes using only  
the accelerator pedal. The sensitivity of the accel-  
erator pedal decreases and becomes more pre-  
cise by means of the full actuation of the pedal  
being restricted to adjusting engine speed within  
a limited range. The brake system brakes itself  
and provides the car with a low and even speed,  
so allowing the driver to fully focus on steering.  
AWD principle7.  
The power is automatically distributed between  
the front and rear wheels. An electronically con-  
trolled clutch system distributes the power to the  
wheels that have the best grip on the current  
road surface. This provides the best traction and  
prevents wheel spin. Under normal driving condi-  
tions, the majority of power is transmitted to the  
front wheels.  
HDC is particularly helpful on steep gradients  
with an uneven road surface and slippery sec-  
All-wheel drive improves driving safety in rain,  
snow and icy conditions.  
6
V40 CROSS COUNTRY  
The figure is schematic - details may vary depending on market and model.  
HDC is only possible on the V40 CROSS COUNTRY AWD.  
7
8
}}  
* Option/accessory. 289  
STARTING AND DRIVING  
tions. E.g. when launching a boat on a trailer from  
a ramp.  
With manual transmission, the function works  
only on first gear and reverse gear.  
if a gear other than 1 or R is selected in  
manual gearshift mode on an automatic  
gearbox.  
||  
•
With automatic transmission, gear 1 must be  
selected in manual gearshift mode (+S-), or R  
must be selected. This is indicated by the number  
1 or R in the combined instrument panel, see  
Automatic gearbox - Geartronic* (p. 274).  
WARNING  
This function can be switched off at any time. If  
the function is switched off while driving on a  
steep downhill gradient, the braking effect will  
gradually decrease.  
HDC does not work in all situations but is  
designed merely as a supplementary aid.  
The driver always bears ultimate responsibility  
for ensuring that the vehicle is driven safely.  
NOTE  
NOTE  
With HDC activated you may experience a  
delay between acceleration pedal activation  
and engine response.  
Function  
HDC cannot be activated on an automatic  
gearbox in position D.  
Operation  
Related information  
HDC allows the car to roll at a maximum of  
10 km/h (6 mph) forwards with engine braking  
and 7 km/h (4 mph) backwards. However, any  
speed within the gear's speed register can be  
selected using the accelerator pedal. When the  
accelerator pedal is released, the car is braked  
quickly to 10 or 7 km/h (6 or 4 mph) respec-  
tively, irrespective of the hill's gradient and with-  
out the need for the foot brake.  
All Wheel Drive (AWD)* (p. 289)  
Automatic gearbox - Geartronic* (p. 274)  
Manual gearbox (p. 273)  
•
•
•
HDC On/Off.  
The brake lights come on automatically when the  
function is operating. The driver can brake or stop  
the car at any time by using the footbrake.  
HDC is activated or deactivated with one of the  
centre console's switches. The lamp within it illu-  
minates when the function is activated.  
HDC is deactivated:  
When HDC is working normally the com-  
bined instrument panel's symbol illumi-  
nates combined with the text message Hill  
descent control ON.  
with the centre console's On/Off button  
•
•
if a gear other than 1 or R is selected on a  
manual gearbox  
290  
* Option/accessory.  

Related Topics

STARTING AND DRIVING
Starting the engine Switching off the engine Steering lock Jump starting Gearboxes Manual gearbox Gear shift indicator* Automatic gearbox - Geartronic* Gear selector inhibitor Hill start assist (HSA)* Start/Stop* Start/Stop* - the engine auto-starts Start/Stop* - involuntary stop manual gearbox Start/Stop* - symbols and messages Drive mode ECO* All Wheel Drive (AWD)* Foot brake Foot brake - anti-lock braking system Foot brake - emergency brake lights and automatic hazard warning flashers Parking brake Driving in water Overheating Driving with open tailgate Overload - starter battery Preparations for a long trip Winter driving Fuel filler flap - Opening/closing Fuel filler flap - manual opening Filling up with fuel Fuel - handling Fuel - petrol Fuel - diesel Catalytic converters Filling with fuel - with a fuel can Diesel particle filter (DPF) Emission control with AdBlue? Handling AdBlue? AdBlue? ? checking and topping up Economical driving Driving with a trailer Driving with a trailer - manual gearbox Driving with a trailer - automatic gearbox Towbar* Detachable towbar* - storage Detachable towbar* - specifications Detachable towbar* - attachment/removal Trailer Stability Assist - TSA Towing Towing eye Recovery

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