Jeep Wrangler Owner's Manual page 157

156 SAFETY
 The vehicle is driven greater than 40 mph (64 km/h)
(HDC exits immediately).
 HDC detects excessive brake temperature.
Feedback To The Driver
The instrument cluster has an HDC icon and the HDC
switch has an indicator light, which offers feedback to the
driver about the state HDC is in.
 The cluster icon and switch indicator light will illumi-
nate and remain on solid when HDC is enabled or acti-
vated. This is the normal operating condition for HDC.
 The cluster icon and switch indicator light will flash for
several seconds then extinguish when the driver
pushes the HDC switch but enable conditions are not
met.
 The cluster icon and switch indicator light will flash for
several seconds then extinguish when HDC disables
due to excess speed.
 The cluster icon and switch indicator light will flash
when HDC deactivates due to overheated brakes. The
flashing will stop and HDC will activate again once the
brakes have cooled sufficiently.
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.
Hill Start Assist (HSA)
HSA is designed to mitigate roll back 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 following conditions must be met in order for HSA to
activate:
 The feature must be enabled.
 The vehicle must be stopped.
 The parking brake must be off.
 The driver door must be closed. (If the doors are
attached, then the door must be closed. If the doors
are detached then the driver's seat belt must be
buckled).
 The vehicle must be on a sufficient grade.
 The gear selection must match vehicle uphill direction
(i.e., vehicle facing uphill is in forward gear; vehicle
backing uphill is in REVERSE gear).
 HSA will work in REVERSE gear and all forward gears.
The system will not activate if the transmission is in
PARK or NEUTRAL. For vehicles equipped with a
manual transmission, if the clutch is pressed, HSA will
remain active.
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.