Jeep Grand Cherokee 2020, Owner'S Manual

Page: 129 / 484

SAFETY 127

The vehicle is driven greater than 20 mph
(32 km/h) for greater than 70 seconds

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 LED icon, which offers
feedback to the driver about the state HDC is in.

The cluster icon and switch lamp will illumi -
nate and remain on solid when HDC is
enabled or activated. This is the normal oper -
ating condition for HDC.

The cluster icon and switch lamp 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 lamp will flash for
several seconds, then extinguish when HDC
disables due to excess speed.

The cluster icon and switch lamp will flash
when HDC deactivates due to overheated
brakes. The flashing will stop and HDC will
activate again once the brakes have cooled
sufficiently.
Hill Start Assist (HSA)
The Hill Start Assist (HSA) system 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 park brake must be off.

The driver door must be closed.

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 (R) gear).

HSA will work in REVERSE gear and all
forward gears. The system will not activate if
the transmission is in PARK (P) or NEUTRAL
(N). For vehicles equipped with a manual
transmission, if the clutch is pressed, HSA
will remain active.
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.
4
20_WK_OM_EN_USC_t.book Page 127