RAM 1500 2022 Owner's Manual page 319

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)

9th = 5.6 mph (9 km/h) – If Equipped

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.
The 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.

Disabling HDC
HDC will be deactivated and disabled if any of the
following conditions occur:
The driver pushes the HDC switch.

The driveline is shifted out of the 4WD Low.

The parking brake is applied.

The driver door opens.

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 illuminate

and remain on solid when HDC is enabled or
activated. This is the normal operating 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 condi-
tions are not met.
SAFETY 317
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