Filter
Top Products
Driving systems
182
Downhill Speed Regulation (DSR)
G
Warning!
The Downhill Speed Regulation (DSR) is a
convenience system designed to assist the
driver during vehicle operation. The system
must be set to be appropriate for the
topographical and weather conditions
encountered which can change quickly.
The driver is and must remain at all times
responsible for the vehicle speed and for
safe brake operation.
Depending on the programmed speed,
actual vehicle speed and gradient,
switching on the DSR while driving can
cause the vehicle to slow down rapidly and
you may hear a sound which is caused by
the activation of the vehicle’s brake system
through the DSR. Sudden and unexpected
deceleration can result in loss of vehicle
control, causing an accident and/or
serious personal injury to you and others.
Do not switch on the DSR in a circumstance
where rapid deceleration could result in a
loss of vehicle control.
For more information, see “Off-road
driving” (Y page 303).
The DSR is an aid for driving downhill. The
DSR regulates your vehicle’s speed when
driving downhill to the value set in the control
system (Y page 165). The steeper the
downhill gradient is, the greater the brake
application. On flat road surfaces, the DSR
brakes only slightly or not at all.
The DSR regulates the vehicle’s speed in
automatic transmission positions D, or R.
i
In addition, make use of the engine’s
braking effect by shifting the automatic
transmission into a lower gear.
You can drive slower or faster than the set
speed at any time by braking the vehicle or
depressing the accelerator pedal.
i
Whenever the DSR is switched on, the
DSR will use the programmed default
speed to regulate the vehicle’s speed. The
default speed programmed at the factory is
4 mph (Canada: 6 km/h). The default speed
can be reprogrammed using the control
system (Y page 165). The next time the
DSR is switched on, the DSR will use the
newly programmed default speed to
regulate the vehicle’s speed.
Once the DSR is switched on, you can
adjust the set speed using the cruise
control lever (Y page 170). Keep in mind
that adjusting the set speed using the
cruise control lever with the DSR switched
on will not change the programmed default
speed. If the DSR is switched off and then
switched on again, the DSR will use the
programmed default speed.
Depending on the road surface and level of
downhill grade, the DSR may not be able to
maintain the set speed. To maintain the set
speed, apply the brakes if necessary.
Switching the DSR on/off
Vehicles without enhanced off-road package
1
DSR switch
2
Indicator lamp
Controls in detail