Jeep GRAND CHEROKEE L 2021, Owner'S Manual

Page: 229 / 388

SAFETY 227
NOTE:

The ESC Activation/Malfunction Indicator Light
and the ESC OFF Indicator Light come on
momentarily each time the ignition is placed in
the ON/RUN mode.

Each time the ignition is placed in the ON/RUN
mode, the ESC system will be on even if it was
turned off previously.

The ESC system will make buzzing or clicking
sounds when it is active. This is normal; the
sounds will stop when ESC becomes inactive
following the maneuver that caused the ESC
activation.
Hill Descent Control (HDC) — If Equipped
HDC is intended for low speed off-road
driving while in 4WD Low. HDC maintains
vehicle speed while descending hills
during various driving situations. HDC
controls vehicle speed by actively controlling the
brakes.
HDC Has Three States:
1. Off (feature is not enabled and will not
activate).
2. Enabled (feature is enabled and ready but
activation conditions are not met, or driver is
actively overriding with brake or throttle
application).
3. Active (feature is enabled and actively
controlling vehicle speed).
Enabling HDC
HDC is enabled by pushing the HDC switch, but the
following conditions must also be met to enable
HDC:

The driveline is in 4WD Low.

The vehicle speed is below 5 mph (8 km/h).

The parking brake is released.

The driver door is closed.
Activating HDC
Once HDC is enabled it will activate automatically
if driven down a grade of sufficient magnitude. The
set speed for HDC is selectable by the driver, and
can be adjusted by using the gear shift +/-. The
following summarizes the HDC set speeds:
HDC Target Set Speeds

P = No set speed. HDC may be enabled but will
not activate.

R = 0.6 mph (1 km/h)

N = 1.2 mph (2 km/h)

D = 0.6 mph (1 km/h)

1st = 0.6 mph (1 km/h)

2nd = 1.2 mph (2 km/h)

3rd = 1.8 mph (3 km/h)

4th = 2.5 mph (4 km/h)

5th = 3.1 mph (5 km/h)

6th = 3.7 mph (6 km/h)

7th = 4.3 mph (7 km/h)

8th = 5.0 mph (8 km/h)
NOTE:
During HDC the +/- shifter input is used for HDC
target speed selection, but will not affect the gear
chosen by the transmission. When actively
controlling HDC the transmission will shift appro -
priately for the driver-selected set speed and corre -
sponding driving conditions.
Driver Override
The driver may override HDC activation with
throttle or brake application at any time.
Deactivating HDC
HDC will be deactivated but remain available if any
of the following conditions occur:

The driver overrides HDC set speed with throttle
or brake application.

Vehicle speed exceeds 20 mph (32 km/h) but
remains below 40 mph (64 km/h).

The vehicle is on a downhill grade of insufficient
magnitude, is on level ground, or is on an uphill
grade.

The vehicle is shifted to PARK.
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