2023 RAM PROMASTER light

SAFETY157
Trailer Sway Control (TSC) — If Equipped
TSC uses sensors in the vehicle to recognize an
excessively swaying trailer and will take the
appropriate actions to attempt to stop the sway.
The system may reduce engine power and apply
the brake of the appropriate wheel(s) to counteract
the sway of the trailer.
NOTE:
TSC cannot stop all trailers from swaying. Always use
caution when towing a trailer and follow the trailer
tongue weight recommendations
Ú
page 124.
When TSC is functioning, the ESC Activation/
Malfunction Indicator Light will flash, the engine
power may be reduced, and you may feel the
brakes being applied to individual wheels to
attempt to stop the trailer from swaying. TSC is
disabled when the ESC system is in the “Partial
Off” mode.
DROWSY DRIVER DETECTION (DDD) —
IF EQUIPPED
DDD detects when the driver is feeling fatigued
and warns the driver to pull over and take a break.
TO ACTIVATE/DEACTIVATE

DDD can be activated and deactivated through the
Uconnect system by selecting the following in order:

1. “Safety & Driving Assistance”

2. “Drowsy Driver Detection”
SYSTEM OPERATION
Using feedback obtained from the driver’s steering
patterns, any buttons/switches that are pressed,
and from the front camera, the system implements
two operating logics:
The first operating logic takes the driving style
into account, observing the road and detecting
to what extent the driver can continue driving
with few lane crossing events.
The second operating logic measures the time
spent behind the wheel with the vehicle speed
above 40 mph (60 km/h) and below 100 mph
(160 km/h).
WARNING!
The TCS cannot prevent the natural laws of
physics from acting on the vehicle, nor can it
increase the traction afforded.
The TCS cannot prevent collisions, including
those resulting from excessive speed in turns,
or hydroplaning.
The capabilities of a TCS-equipped vehicle
must never be exploited in a reckless or
dangerous manner, which could jeopardize
the user's safety or the safety of others.
WARNING!
If TSC activates while driving, slow the vehicle
down, stop at the nearest safe location, and
adjust the trailer load to eliminate trailer sway.
WARNING!
The DDD system is an aid for driving and does
not relieve the driver of the responsibility of
driving the vehicle. Always drive alert and get
plenty of rest before driving. If you experience
fatigue while driving, do not wait for the DDD to
intervene with a warning. Choose a safe and
secure location where you can pull over safely
for a break. Only return to the road when you are
in the right physical and mental condition to
prevent endangering yourself and others.
6

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158SAFETY
If the driving style indicates that the driver is
unable to follow the road trajectory and respect the
horizontal lane markings while within the operating
speed range of the system, a pop up will display on
the instrument cluster display to suggest that the
driver should stop for a break. An audible signal
will also sound.
If the driver accepts the suggestion provided by the
system by pushing the “OK” button on the left side
of the steering wheel, the message will disappear
from the display.

If the driver
does not acknowledge
the warning, it will
be displayed for 60 seconds and then disappear.

NOTE:In the event of a DDD system failure, a dedicated
message will appear in the instrument cluster
display.

DDD Warning Message

AUXILIARY DRIVING SYSTEMS
BLIND SPOT MONITORING (BS M) —
I
F EQUIPPED
The BSM system uses two radar sensors, located
inside the taillights, to detect highway licensable
vehicles (automobiles, trucks, motorcycles, etc.)
that enter the blind spot zones from the rear/front/
side of the vehicle.

Rear Detection Zones

When the vehicle is started, the BSM Warning Light will
momentarily illuminate in both outside rearview mirrors
to let the driver know that the system is operational.
The BSM system sensors operate when the vehicle is in
any forward gear and enters standby mode when the
vehicle is in PARK. The BSM detection zone covers approximately one lane
width on both sides of the vehicle 12 ft (3.8 m). The
zone length starts at the outside rearview mirror and
extends approximately 10 ft (3 m) beyond the rear
fascia/bumper of the vehicle. The BSM system
monitors the detection zones on both sides of the
vehicle when the vehicle speed reaches approximately
6 mph (10 km/h) or higher and will alert the driver of
vehicles in these areas.

NOTE:
The BSM system DOES NOT alert the driver
about rapidly approaching vehicles that are
outside the detection zones.
The Blind Spot Monitoring (BSM) system may
experience dropouts (blinking on and off) of the
side mirror warning indicator lamps when a
motorcycle or any small object remains at the
side of the vehicle for extended periods of time
(more than a couple of seconds).

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SAFETY159
The vehicle’s taillights, where the radar sensors
are located, must remain free of snow, ice, and
dirt/road contamination so that the BSM system
can function properly. Do not block the taillights
with foreign objects (bumper stickers, bicycle
racks, etc.).

Radar Sensor Locations

If the system detects degraded performance due
to contamination or foreign objects, a message will
warn you of a blocked sensor and the warning
indicators in the side view mirrors will be on.
The warning indicators will remain illuminated until
blockage clearing conditions are met. First clear
the taillights around the sensors of the blockage.
After removing the blockage, the following
procedure can be used to reset the system, cycle
the ignition from ON to OFF and then back ON. If the blockage message is still present after
cycling the ignition and driving in traffic, check
again for a blockage.
The BSM system notifies the driver of objects in the
detection zones by illuminating the BSM Warning
Light located in the outside mirrors in addition to
sounding an audible (chime) alert and reducing the
radio volume Ú
page 161.

Warning Light Location

The BSM system monitors the detection zone from
three different entry points (side, rear, front) while
driving to see if an alert is necessary. The BSM
system will issue an alert during these types of
zone entries.
Entering From The Side
Vehicles that move into your adjacent lanes from
either side of the vehicle.
Side Monitoring

Entering From The Rear
Vehicles that come up from behind your vehicle on
either side and enter the rear detection zone with
a relative speed of less than 30 mph (48 km/h).

Rear Monitoring

6

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160SAFETY
Overtaking Traffic
If you pass another vehicle slowly with a relative
speed less than 15 mph (24 km/h) and the vehicle
remains in the blind spot for approximately
1.5 seconds, the warning light will be illuminated.
If the difference in speed between the two vehicles
is greater than 15 mph (24 km/h), the warning
light will not illuminate.

Overtaking/Approaching Overtaking/Passing

The BSM system is designed not to issue an alert
on stationary objects such as guardrails, posts,
walls, foliage, berms, snow banks, car washes, etc.
However, occasionally the system may alert on
such objects. This is normal operation and your
vehicle does not require service.
The BSM system will not alert you of objects that
are traveling in the opposite direction of the vehicle
in adjacent lanes Ú page 280.
Opposing Traffic

WARNING!

The Blind Spot Monitoring system is only an aid to
help detect objects in the blind spot zones. The BSM
system is not designed to detect pedestrians,
bicyclists, or animals. Even if your vehicle is
equipped with the BSM system, always check your
vehicle’s mirrors, glance over your shoulder, and use
your turn signal before changing lanes. Failure to do
so can result in serious injury or death.

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SAFETY161
Rear Cross Path (RCP)
RCP is intended to aid the driver when backing out
of parking spaces where their vision of oncoming
vehicles may be blocked. Proceed slowly and
cautiously out of the parking space until the rear
end of the vehicle is exposed. The RCP system will
then have a clear view of the cross traffic, and if an
oncoming vehicle is detected, alert the driver.

RCP Detection Zones

RCP monitors the rear detection zones on both
sides of the vehicle, for objects that are moving
toward the side of the vehicle with a minimum
speed of approximately 3 mph (5 km/h), to objects
moving a maximum of approximately 20 mph
(32 km/h), such as in parking lot situations.
When RCP is on and the vehicle is in REVERSE (R),
the driver is alerted using both the visual and
audible alarms, including reducing the radio
volume.
NOTE:
In a parking lot situation, oncoming vehicles can be
blocked by vehicles parked on either side. If the
sensors are blocked by other structures or vehicles, the
system will not be able to alert the driver.

Blind Spot Modes

Blind Spot has three selectable modes of operation
that are available in the Uconnect system.

Blind Spot Alert Lights Only

When operating in Blind Spot Alert mode, the BSM
system will provide a visual alert in the appropriate side
view mirror based on a detected object. However, when
the system is operating in Rear Cross Path (RCP) mode,
the system will respond with both visual and audible
alerts when a detected object is present. Whenever an
audible alert is requested, the radio is muted.
Blind Spot Alert Lights/Chime

When operating in Blind Spot Alert Lights/Chime mode,
the BSM system will provide a visual alert in the
appropriate side view mirror based on a detected
object. If the turn signal is then activated, and it
corresponds to an alert present on that side of the
vehicle, an audible chime will also be sounded.
Whenever a turn signal and detected object are present
on the same side at the same time, both the visual and
audible alerts will be issued. In addition to the audible
alert the radio (if on) will also be muted.

NOTE:Whenever an audible alert is requested by the
BSM system, the radio is also muted.

When the system is in RCP, the system shall respond
with both visual and audible alerts when a detected
object is present. Whenever an audible alert is
requested, the radio is also muted. Turn/hazard signal
status is ignored; the RCP state always requests the
chime.

Blind Spot Alert Off
When the BSM system is turned off there will be no
visual or audible alerts from either the BSM or RCP
systems.
NOTE:The BSM system will store the current operating
mode when the vehicle is shut off. Each time the
vehicle is started the previously stored mode will
be recalled and used.
WARNING!
Rear Cross Path Detection (RCP) is not a backup
aid system. It is intended to be used to help a
driver detect an oncoming vehicle in a parking
lot situation. Drivers must be careful when
backing up, even when using RCP. Always check
carefully behind your vehicle, look behind you,
and be sure to check for pedestrians, animals,
other vehicles, obstructions, and blind spots
before backing up. Failure to do so can result in
serious injury or death.
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SAFETY163
NOTE:The ability to detect a trailer may be degraded in
crowded or busy environments. Busy parking lots,
narrow areas surrounded with trees, or any other
crowded area may prevent the radar sensors from
being able to adequately detect the trailer. The
system will try to detect a trailer at every ignition
cycle or 90 seconds of standstill.

Trailer Length Detection
Trailer length will be identified and placed into one
of the following categories:
Trailer length up to 10 ft (3 m) — Blind spot zone
will be adjusted to 10 ft (3 m) .
Trailer length between 10 ft to 20 ft
(3 m to 6 m) — Blind spot zone will be adjusted
to 20 ft (6 m) .
Trailer length between 20 ft to 30 ft (6 m to 9 m) — Blind spot zone will be adjusted
to 30 ft (9 m) .
Trailer length between 30 ft and 39.5 ft (9 m to 12 m) — Blind spot zone will be adjusted to Max distance .
NOTE:Trailer length is determined within +/- 3 ft (1 m) of
actual length. Trailers that are the same size as the
category limit, 10/20/30 ft (3/6/9 m), could be
subject to being placed in the category above or
below the correct one.
Trailer Merge Warning
Trailer Merge Warning is the extension of the blind
spot function to cover the length of the trailer, plus
a safety margin, to warn the driver when there is a
vehicle in the adjacent lane. The driver is alerted by
the illumination of the BSM Warning Light located
in the outside mirror on the side the other vehicle
is detected on. In addition, an audible (chime) alert
will be heard and radio volume will be reduced
Ú page 161.
NOTE:
The Trailer Merge Alert system DOES NOT alert
the driver about rapidly approaching vehicles
that are outside the detection zones.
The Blind Spot Monitoring (BSM) system may
experience drop outs (blinking on and off) of the
side mirror warning indicator lamps when a
motorcycle or any small object remains at the
side of the vehicle for extended periods of time
(more than a couple of seconds).
Crowded areas such as parking lots, neighbor -
hoods, etc. may lead to an increased amount of
false alerts. This is normal operation.
1 — Trailer Length
2 — Trailer Hitch
3 — Trailer Width
WARNING!
The Blind Spot Monitoring system is only an aid
to help detect objects in the blind spot zones.
The BSM system is not designed to detect
pedestrians, bicyclists, or animals. Even if your
vehicle is equipped with the BSM system, always
check your vehicle’s mirrors, glance over your
shoulder, and use your turn signal before
changing lanes. Failure to do so can result in
serious injury or death.6

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166SAFETY
Service FCW Warning
If the system turns off, and the instrument cluster
displays: “FCW Unavailable Service Required”,
this indicates there is an internal system fault.
Although the vehicle is still drivable under normal
conditions, have the system checked by an
authorized dealer.
The “FCW Temporarily Unavailable” message can
sometimes be displayed while driving in highly
reflective areas (i.e. tunnels with reflective tiles, or
ice and snow). The system will recover after the
vehicle has left these areas. Under rare conditions,
when the camera is not tracking any vehicles or
objects in its path, this warning may temporarily
occur. If weather conditions are not a factor, the
driver should examine the fascia/bumper where
the camera is located. It may require cleaning or
removal of an obstruction from the fascia/bumper
cover.
The FCW Warning Light will appear on the
instrument cluster to indicate the front camera
is obstructed by sun or other visibility reducing
weather.
NOTE:
If the “FCW Temporarily Unavailable” message
occurs frequently (e.g. more than once on every
trip) without any snow, rain, mud, or other
obstruction, have the camera realigned at an
authorized dealer.
Installing a snow plow or front-end protector is
not recommended. Doing so may block the
camera and inhibit FCW operation.
Use only a soft cloth for cleaning. Do not use
solvents or abrasive pastes.
Precautions While Driving With FCW
In certain driving conditions, such as:
Driving in the vicinity of a curve
Small vehicles and/or not aligned to the lane
Lane changing of other vehicles
Passing of vehicles in an oncoming intersection
The intervention of the system could be
unexpected or delayed. The driver must therefore
always pay particular attention, while maintaining
control of the vehicle to drive in complete safety. Driving In The Vicinity Of A Curve
Entering or exiting a large curve, the system could
detect the presence of a vehicle that is in front of
the vehicle, but that does not preside in the same
lane. In cases such as this, the system might
respond.

Driving In The Vicinity Of A Curve

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168SAFETY
The minimum speed for PEB activation is
3 mph (5 km/h).
Turning PEB On Or Off
NOTE:The default status of PEB is “On.” This allows the
system to warn you of a possible frontal collision
with the pedestrian/cyclist.
PEB is turned on and off using the FCW button in
the Uconnect display in the control settings.
Ú page 134.
TIRE PRESSURE MONITORING
S
YSTEM (TPMS)
The Tire Pressure Monitoring System (TPMS) will
warn the driver of a low tire pressure based on the
vehicle recommended cold placard pressure. The tire pressure will vary with temperature
by about 1 psi (7 kPa) for every 12°F (6.5°C).
This means that when the outside temperature
decreases, the tire pressure will decrease. Tire
pressure should always be set based on cold
inflation tire pressure. This is defined as the tire
pressure after the vehicle has not been driven for
at least three hours, or driven less than 1 mile
(1.6 km) after a three hour period. The cold tire
inflation pressure must not exceed the maximum
inflation pressure molded into the tire sidewall.
The tire pressure will also increase as the vehicle
is driven — this is normal and there should be no
adjustment for this increased pressure.
See Ú
page 249 on how to properly inflate the
vehicle’s tires.
The TPMS will warn the driver of a low tire pressure
if the tire pressure falls below the low-pressure
warning limit for any reason, including low
temperature effects and natural pressure loss
through the tire.
The TPMS will continue to warn the driver of low
tire pressure as long as the condition exists, and
will not turn off until the tire pressure is at or above
the recommended cold placard pressure. Once the
low tire pressure warning (TPMS Warning Light)
illuminates, you must increase the tire pressure to
the recommended cold placard pressure in order for the TPMS Warning Light to turn off. The system
will automatically update and the TPMS Warning
Light will turn off once the system receives the
updated tire pressures. The vehicle may need to
be driven for up to 20 minutes above 15 mph
(24 km/h) in order for the TPMS to receive this
information.
NOTE:When filling warm tires, the tire pressure may need
to be increased up to an additional 4 psi (28 kPa)
above the recommended cold placard pressure in
order to turn the TPMS Warning Light off.

For example, your vehicle may have a recommended
cold (parked for more than three hours) placard
pressure of 30 psi (207 kPa). If the ambient
temperature is 68°F (20°C) and the measured tire
pressure is 27 psi (186 kPa), a temperature drop
to 20°F (-7°C) will decrease the tire pressure to
approximately 23 psi (158 kPa). This tire pressure is
sufficiently low enough to turn on the TPMS Warning
Light. Driving the vehicle may cause the tire pressure to
rise to approximately 27 psi (186 kPa), but the TPMS
Warning Light will still be on. In this situation, the TPMS
Warning Light will turn off only after the tires are
inflated to the vehicle’s recommended cold placard
pressure value.

WARNING!
Pedestrian Emergency Braking (PEB) is not
intended to avoid a collision on its own, nor can
PEB detect every type of potential collision with
a pedestrian. The driver has the responsibility to
avoid a collision by controlling the vehicle via
braking and steering. Failure to follow this
warning could lead to serious injury or death.

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