RAM 2500 2023 Owner's Manual page 181

Setting The Following Distance In ACC
The specified following distance for Adaptive Cruise
Control (ACC) can be set by varying the distance setting
between four bars (longest), three bars (long), two bars
(medium) and one bar (short). Using this distance setting
and the vehicle speed, ACC calculates and sets the
distance to the vehicle ahead. This distance setting
displays in the instrument cluster display.
Distance Settings
1 — Longest Distance Setting (Four Bars)
2 — Medium Distance Setting (Two Bars)
3 — Long Distance Setting (Three Bars)
4 — Short Distance Setting (One Bar)
To increase the distance setting, push the Distance
Increase button and release. Each time the button is
pushed, the distance setting increases by one bar (longer).
To decrease the distance setting, push the Distance
Decrease button and release. Each time the button is
pushed, the distance setting decreases by one bar
(shorter).
If there is no vehicle ahead, the vehicle will maintain the
set speed. If a slower moving vehicle is detected in the
same lane, the instrument cluster displays the ACC Set
With Target Detected Indicator Light, and the system
adjusts vehicle speed automatically to maintain the
distance setting, regardless of the set speed.
The vehicle will then maintain the set distance until:
 The vehicle ahead accelerates to a speed above the
set speed.
 The vehicle ahead moves out of your lane or view of the
sensor.
 The distance setting is changed.
 The system disengages.
The maximum braking applied by ACC is limited; however,
the driver can always apply the brakes manually, if
necessary.
NOTE:
The brake lights will illuminate whenever the ACC system
applies the brakes.
A Proximity Warning will alert the driver if ACC predicts that
its maximum braking level is not sufficient to maintain the
set distance. If this occurs, a visual alert "BRAKE!" will
flash in the instrument cluster display and a chime will
sound while ACC continues to apply its maximum braking
capacity.
STARTING AND OPERATING
NOTE:
The "BRAKE!" screen in the instrument cluster display is a
warning for the driver to take action and does not mean
that the Forward Collision Warning system is applying the
brakes autonomously.
Overtake Aid
When driving with ACC engaged and following a vehicle,
the system will provide an additional acceleration up to
the ACC set speed to assist in passing the vehicle. This
additional acceleration is triggered when the driver utilizes
the left turn signal and will only be active when passing on
the left hand side.
ACC Operation At Stop
If the ACC system brings your vehicle to a standstill while
following a vehicle ahead, your vehicle will resume motion,
without any driver interaction, if the vehicle ahead starts
moving within two seconds of your vehicle coming to a
standstill.
If the vehicle in front does not start moving within two
seconds of your vehicle coming to a standstill, the ACC
with Stop system will cancel and the brakes will release.
A cancel message will display on the instrument cluster
display and produce a warning chime. The driver must now
manually operate the vehicle's accelerator and brakes.
While ACC with Stop is holding your vehicle at a standstill,
if the driver seat belt is unbuckled or the driver door is
opened, the ACC with Stop system will cancel and the
brakes will release. A cancel message will display on the
instrument cluster display and produce a warning chime.
The driver must now manually operate the vehicle's
accelerator and brakes.
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