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SAFETY 227
Hill Start Assist (HSA)
HSA is designed to help the driver accelerate the
vehicle from a complete stop while on an incline. If
the driver releases the brake while stopped on an
incline, HSA will continue to hold the brake
pressure for a short period. If the driver does not
apply the throttle before this time expires, the
system will release brake pressure and the vehicle
will roll down the hill as normal. The system will
release brake pressure in proportion to amount of
throttle applied.
The following conditions must be met in order for
HSA to a
ctivate:
The vehicle must be stopped.
The vehicle must be on a 5% (approximate)
grade or greater hill.
The gear selection must match vehicle uphill
direction (i.e., vehicle facing uphill is in forward
gear; vehicle backing uphill is in REVERSE gear).
For vehicles equipped with an automatic trans-
mission, the HSA will work in REVERSE gear and
all for
ward gears. The system will not activate if
the transmission is in PARK.
Disabling And Enabling HSA
This feature can be turned on or turned off. To
change the current setting, see
Ú page 64.
Traction Control System (TCS)
TCS monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and
engine power is reduced to provide enhanced
acceleration and stability. A feature of the TCS,
Brake Limited Differential (BLD) functions similarly
to a limited slip differential and controls the wheel
spin across a driven axle. If one wheel on a driven
axle is spinning faster than the other, the system
will apply the brake of the spinning wheel. This will
allow more engine torque to be applied to the
wheel that is not spinning. This feature remains
active even if TCS and Electronic Stability Control
(ESC) are in the “Partial Off” mode or the “Full Off”
modes. For further information, see
Ú page 223.
Trailer Sway Control (TSC) — If Equipped
TSC uses sensors in the vehicle to recognize an
excessively swaying trailer and will take the
appropriate actions to attempt to stop the sway.
The system may reduce engine power and apply
the brake of the appropriate wheel(s) to counteract
the sway of the trailer.
NOTE:
TSC cannot stop all trailers from swaying. Always
use ca
ution when towing a trailer and follow the
trailer tongue weight recommendations. For
further information, see
Ú page 124. When TSC is
functioning, the ESC Activation/Malfunction Indi-
cator Light will flash, the engine power may be
r
educe
d and you may feel the brakes being applied
to individual wheels to attempt to stop the trailer
from swaying. TSC is disabled when the ESC
system is in the “Partial Off” mode.
WARNING!
HDC is only intended to assist the driver in
controlling vehicle speed when descending hills.
The driver must remain attentive to the driving
conditions and is responsible for maintaining a
safe vehicle speed.
WARNING!
There may be situations where the Hill Start
Assist (HSA) will not activate and slight rolling
may occur, such as on minor hills or with a
loaded vehicle, or while pulling a trailer. HSA is
not a substitute for active driving involvement. It
is always the driver’s responsibility to be
attentive to distance to other vehicles, people,
and objects, and most importantly brake
operation to ensure safe operation of the vehicle
under all road conditions. Your complete
attention is always required while driving to
maintain safe control of your vehicle. Failure to
follow these warnings can result in a collision or
serious personal injury.
6
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