sensor RAM PROMASTER 2022 User Guide

88STARTING AND OPERATING
Display Warnings And Maintenance
RADAR SENSOR UNAVAILABILITY WARNING
The “ACC Unavailable Wipe Front Radar Sensor”
warning will display and a chime will sound when
conditions temporarily limit system performance.
This most often occurs at times of poor visibility,
such as in snow or heavy rain. The ACC system
may also become temporarily blinded due to
obstructions, such as mud, dirt or ice. In these
cases, the instrument cluster display will display
the above message and the system will deactivate.
This message can sometimes be displayed while
driving in highly reflective areas (i.e. ice and snow,
or tunnels with reflective tiles). The ACC system will
recover after the vehicle has left these areas.
Under rare conditions, when the radar is not
tracking any vehicles or objects in its path this
warning may temporarily occur.
NOTE:If the “ACC Unavailable Wipe Front Radar Sensor”
warning is active, Fixed Speed Cruise Control can
be still enabled.
If weather conditions are not a factor, the driver
should examine the sensor. It may require cleaning
or removal of an obstruction. The sensor is located
in the center of the vehicle behind the lower grille.
To keep the ACC system operating properly, it is
important to note the following maintenance
items:
Always keep the sensor clean. Carefully wipe the
sensor lens with a soft cloth. Be cautious not to
damage the sensor lens.
Do not remove any screws from the sensor.
Doing so could cause an ACC system malfunc -
tion or failure and require a sensor realignment.
If the sensor or front end of the vehicle is
damaged due to a collision, see an authorized
dealer for service.
Do not attach or install any accessories near the
sensor, including transparent material or after -
market grilles. Doing so could cause an ACC
system failure or malfunction.
When the condition that deactivated the system is
no longer present, the system will return to the
“Adaptive Cruise Control Off” state and will resume
function by simply reactivating it.
NOTE:
If the “ACC Unavailable Wipe Front Radar
Sensor” message occurs frequently (e.g. more
than once on every trip) without any snow, rain,
mud, or other obstruction, have the radar
sensor realigned at an authorized dealer.
Installing a snow plow, front-end protector, an
aftermarket grille or modifying the grille is not
recommended. Doing so may block the sensor
and inhibit ACC operation.
“ACC LIMITED FUNCTIONALITY CAMERA
BLOCKED” WARNING
The “ACC Limited Functionality Camera Blocked”
warning will display and a chime will sound when
conditions temporarily limit system performance.
This most often occurs at times of poor visibility,
such as in snow or heavy rain and fog. The ACC
system may also become temporarily blinded due
to obstructions, such as mud, dirt, or ice on
windshield and fog on the inside of glass. In these
cases, the instrument cluster display will read
“ACC Limited Functionality Camera Blocked” and
the system will have degraded performance.
This message can sometimes be displayed while
driving in adverse weather conditions. The ACC
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.
WARNING!
When the ACC system is resumed, the driver
must ensure that there are no pedestrians,
vehicles or objects in the path of the vehicle.
Failure to follow these warnings can result in a
collision and death or serious personal injury.

22_VF_OM_EN_USC_t.book Page 88

92STARTING AND OPERATING
NOTE:Up or down arrows will be displayed for up to five
seconds.

Traffic Signs Recognized

Supplemental Information
Supplemental information may be displayed along
with a newly detected speed limit indicating
special circumstances the driver should be aware
of. Available supplemental information includes:
School
Construction
Rain
Snow
Fog
Speed Limit Exceeded
When the vehicle’s speed exceeds the displayed
speed limit by 3 mph (5 km/h), the speed limit sign
on the instrument cluster display will show a red
outline to alert the driver.
ACTIVE DRIVING ASSIST SYSTEM —
IF EQUIPPED
OPERATION
The Active Driving Assist (ADA) system is combined
with the Adaptive Cruise Control (ACC) system, and
centers the vehicle in the driving lane while
traveling at speeds up to 93 mph (150 km/h).
Just like ACC, ADA will maintain a set speed as long
as the set distance between your vehicle and the
vehicle in front is maintained. ADA will also keep
your vehicle centered between the lane lines, and
monitor for other vehicles in adjacent lanes.
ADA uses sensors within the steering wheel to
monitor driver attentiveness. ADA requires the
driver’s hands on the steering wheel at all times.
1 — Current Speed Limit With Supplemental
Information (School Zone)
2 — No Passing Zone Detected
3 — Next Speed Limit Detected
WARNING!
To prevent serious injury or death:
Always remain alert and be ready to take
control of the vehicle in the event that the
Active Driving Assist system disables.
Always keep your hands on the steering wheel
when the Active Driving Assist system is acti
-
vated.
Maintain a safe distance from other vehicles
and pay attention to traffic conditions.
Do not place any objects on the steering wheel
(e.g. steering wheel covers) which could inter -
fere with the hand detection sensors.

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96STARTING AND OPERATING
SYSTEM OPERATION/LIMITATIONS
The Active Driving Assist system DOES NOT:
Warn or prevent collisions with other vehicles
Steer your vehicle around stopped vehicles,
slower vehicles, construction equipment,
pedestrians, or animals
Respond to traffic lights or stop signs
Merge onto highways or exit off ramps
Turn your vehicle
Change lanes
React to cross traffic The Active Driving Assist system may have limited
or reduced functionality when one of the following
conditions occur:
The vehicle’s radar sensors and/or forward
facing camera is damaged, covered, or
obstructed (e.g. by mud, ice, snow, etc.)
Driving near highway toll booths
NOTE:If damage to the windshield occurs, have the wind
-
shield replaced by an authorized dealer as soon as
possible.
PARKSENSE FRONT/REAR PARK ASSIST —
IF EQUIPPED
The ParkSense Park Assist system provides visual
and audible indications of the distance between
the rear, and if equipped, the front fascia/bumper
and a detected obstacle when backing up or
moving forward (e.g. during a parking maneuver).
For limitations of the system (e.g. during a parking
maneuver), see Ú page 101.
NOTE:
The system is designed to assist the driver and
not to substitute the driver.

The driver must stay in full control of the vehicle's
acceleration and braking and is responsible for
controlling the vehicle's movements.
ParkSense will retain the last system state
(enabled or disabled) from the last ignition cycle
when the ignition is placed in the ON/RUN position.
ParkSense is active when the gear selector is
shifted to REVERSE or to a forward gear and an
obstacle is detected, as long as the system is on.
When the gear selector shifted to NEUTRAL or
PARK, the system becomes inactive. When the
vehicle is moving forward, the system will remain
active until the vehicle speed remains below
approximately 11 mph (18 km/h). Reducing the
speed approximately below 9 mph (15 km/h), the
system will come back active. When the vehicle is
moving in REVERSE, the system will remain active
as long as the speed remains below the maximum
operating speed of 7 mph (11 km/h). When the
maximum speed limit is exceeded, the system is
disabled and the ParkSense switch LED with
illuminate. The system will become active again if
the vehicle speed reduces below approximately
6 mph (9 km/h).
WARNING!
To prevent serious injury or death:
Always remain alert and be ready to take
control of the vehicle in the event that the
Active Driving Assist system disables.

Always keep your hands on the steering wheel
when the Active Driving Assist system is activated.

Maintain a safe distance from other vehicles
and pay attention to traffic conditions.
Do not place any objects on the steering wheel
(e.g. steering wheel covers) which could inter
-
fere with the hand detection sensors.

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STARTING AND OPERATING97
Interaction With Trailer Towing
The Park Assist system is automatically
deactivated when a trailer is hitched to the vehicle.
The system will be automatically activated as soon
as the trailer is removed.
PARKSENSE SENSORS

The six ParkSense sensors (four when vehicle is not
equipped with front sensors), located in the rear fascia/
bumper, and the six ParkSense sensors located in the
front fascia/bumper, monitor the area in front and
behind the vehicle that is within the sensors’ field of
view. The front sensors detect obstacles from
approximately 12 inches (30 cm) up to 39 inches
(100 cm) from the front fascia/bumper. The rear
sensors can detect obstacles from approximately
12 inches (30 cm) up to 55 inches (140 cm) from the
center of the rear fascia/bumper and up to 24 inches
(60 cm) from the corners of the rear fascia/bumper.
These distances depend on the location, type and
orientation of the obstacle in the horizontal direction.
Rear Park Assist Sensors Location

If several obstacles are detected, the ParkSense
system indicates the nearest obstacle.
The minimum height of a detectable obstacle
corresponds to the maximum height of an obstacle
that would clear the underside of the vehicle
during the parking maneuver.
PARKSENSE WARNING DISPLAY
The ParkSense Warning screen will only be
displayed if “Sound and Display” is selected in the
Uconnect system Ú page 120. The ParkSense Warning screen is located within
the instrument cluster display Ú
page 55. It
provides visual warnings to indicate the distance
between the rear fascia/bumper and/or front
fascia/bumper and the detected obstacle.
PARKSENSE DISPLAY
The warning display will turn on indicating the
system status when the vehicle is in REVERSE or
when the vehicle is in DRIVE and an obstacle has
been detected.
The system will indicate a detected obstacle by
showing a single arc in the left and/or right front or
rear regions based on the object’s distance and
location relative to the vehicle.
If an object is detected in the left and/or right rear
region, the display will show a single arc in the left
and/or right rear region and the system will
produce a tone. As the vehicle moves closer to the
object, the display will show the single arc moving
closer to the vehicle and the tone will change from
a single 1/2 second tone to slow, to fast, to
continuous.
4

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100STARTING AND OPERATING
NOTE:ParkSense will reduce the volume of the radio, if
on, when the system is sounding an audible tone.
Front Park Assist Audible Alerts
ParkSense will turn off the Front Park Assist
audible alert (chime) after approximately three
seconds when an obstacle has been detected, the
vehicle is stationary, and brake pedal is applied.
Adjustable Chime Volume Settings
Front and Rear chime volume settings can be
selected from the Uconnect system Ú page 120.
The chime volume settings include low, medium,
and high.
ParkSense will retain its last known configuration
state through ignition cycles.ENABLING AND DISABLING PARKSENSE

ParkSense can be enabled and disabled with
the ParkSense switch, located on the switch
panel below the Uconnect display.

When the ParkSense switch is pushed to disable
the system, the instrument cluster display
Ú page 55 will show the “ParkSense Disabled”
message for approximately five seconds.
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when the
system is enabled. If the ParkSense switch is
pushed, and requires service, the ParkSense
switch LED will blink momentarily, and then the
LED will be on.
SERVICE THE PARKSENSE PARK ASSIST
S
YSTEM

When the ParkSense System has detected a faulted
condition, the instrument cluster display will actuate a
single chime, and it will show the "PARKSENSE
UNAVAILABLE WIPE REAR SENSORS", "PARKSENSE
UNAVAILABLE WIPE FRONT SENSORS", or the
"PARKSENSE UNAVAILABLE SERVICE REQUIRED"
message for five seconds. Under this condition,
ParkSense will not operate.

If "PARKSENSE UNAVAILABLE WIPE REAR
SENSORS" or "PARKSENSE UNAVAILABLE WIPE
FRONT SENSORS" appears in the instrument
cluster display make sure the outer surface and
the underside of the rear fascia/bumper and/or
WARNING ALERTS FOR FRONT
Front Distance
(inches/cm) Greater than
39 inches (100 cm) 39-32 inches
(100-80 cm) 32-24 inches
(80-60 cm) 24-12 inches
(60-30 cm) Less than 12 inches
(30 cm)
Arcs — Left NoneNoneNone3rd Flashing 4th Flashing
Arcs — Center None1st Solid2nd Flashing 3rd Flashing4th Flashing
Arcs — Right NoneNoneNone3rd Flashing 4th Flashing
Audible Alert Chime NoneAudible chime increases as the object gets close to the vehicle Continuous
Radio Volume Reduced No
Yes Yes Yes

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STARTING AND OPERATING101
front fascia/bumper is clean and clear of snow,
ice, mud, dirt or other obstruction and then cycle
the ignition. If the message continues to appear
see an authorized dealer.
If the "PARKSENSE UNAVAILABLE SERVICE
REQUIRED" message appears in the instrument
cluster display, see an authorized dealer.
PARKSENSE PARK ASSIST FAILURE
I
NDICATIONS
A malfunction of the ParkSense Park Assist
sensors or system is indicated, during REVERSE
gear engagement, by the instrument panel
warning icon.
The warning icon is illuminated and a
message is displayed in the instrument
cluster display (if equipped) Ú page 59.
The sensors and wiring are tested continuously
when the ignition is in the ON/RUN position.
Failures are indicated immediately if they occur
when the system is on.
Even if the system is able to identify that a specific
sensor is in failure condition, the instrument
cluster display shall indicate that the ParkSense
Park Assist system is unavailable, without
reference to the sensor in failure condition. If even
a single sensor fails, the entire system must be
disabled. The system is turned off automatically.
CLEANING THE PARKSENSE SYSTEM
Clean the ParkSense sensors with water, car wash
soap and a soft cloth. Do not use rough or hard
cloths. Do not scratch or poke the sensors.
Otherwise, you could damage the sensors.
PARKSENSE PARK ASSIST SYSTEM
U
SAGE PRECAUTIONS
NOTE:
Ensure that the front and rear fascia/bumper
are free of snow, ice, mud, dirt and debris to
keep the ParkSense system operating properly.
Construction equipment, large trucks, and other
vibrations could affect the performance of
ParkSense.
When you turn ParkSense off, the instrument
cluster display will read “PARKSENSE OFF.”
Furthermore, once you turn ParkSense off, it
remains off until you turn it on again, even if you
cycle the ignition key.
ParkSense, when on, will reduce the volume of
the radio when it is sounding a tone.

Clean the ParkSense sensors regularly, taking
care not to scratch or damage them. The sensors
must not be covered with ice, snow, slush, mud,
dirt or debris. Failure to do so can result in the
system not working properly. The ParkSense system might not detect an obstacle behind or in
front of the fascia/bumper, or it could provide a
false indication that an obstacle is behind or in
front of the fascia/bumper.

Use the ParkSense switch to turn the ParkSense
system off if objects such as bicycle carriers,
etc. are placed within 12 inches (30 cm) from
the rear fascia/bumper. Failure to do so can
result in the system misinterpreting a close
object as a sensor problem, causing the
“PARKSENSE UNAVAILABLE SERVICE
REQUIRED” message to be displayed in
the instrument cluster display.
NOTE:If any objects are attached to the bumper within a
6.5 ft (2 m) field of view, they will interfere and
cause false alerts and possibly blockage.
There may be a delay in the object detection
rate if the object is moving.
The operation of the rear sensors is automati
-
cally deactivated when the trailer's electric plug
is inserted in the vehicle's tow hook socket,
while the front sensors stay active and can
provide acoustic and visual warnings. The rear
sensors are automatically reactivated when the
trailer's cable plug is removed.
4

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102STARTING AND OPERATING
If it is necessary to keep the ball mount and hitch
ball assembly mounted for a long period, it is
possible to filter out the ball mount and hitch ball
assembly presence in the sensor field of view.
The filtering operation must be performed only by
an authorized dealer.
LANESENSE — IF EQUIPPED
LANESENSE OPERATION

The LaneSense system is operational at speeds above
37 mph (60 km/h) and below 112 mph (180 km/h).
The LaneSense system uses a forward looking camera
to detect lane markings and measure vehicle position
within the lane boundaries.

When both lane markings are detected and the
driver drifts out of the lane (no turn signal applied),
the LaneSense system provides a haptic warning
in the form of torque applied to the steering wheel,
as well as a visual warning in the instrument
cluster display, to prompt the driver to remain
within the lane boundaries.
The driver may manually override the haptic
warning by applying force to the steering wheel at
any time.

When only a single lane marking is detected and the
driver drifts across the lane marking (no turn signal
applied), the LaneSense system provides a visual
warning through the instrument cluster display to
prompt the driver to remain within the lane.

WARNING!
Drivers must be careful when backing up even
when using ParkSense. 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. You are responsible for safety and
must continue to pay attention to your
surroundings. Failure to do so can result in
serious injury or death.

Before using ParkSense, it is strongly recom -
mended that the ball mount and hitch ball
assembly be disconnected from the vehicle
when the vehicle is not used for towing. Failure
to do so can result in injury or damage to vehi -
cles or obstacles because the hitch ball will be
much closer to the obstacle than the rear fascia
when the vehicle sounds the continuous tone.
Also, the sensors could detect the ball mount
and hitch ball assembly, depending on its size
and shape, giving a false indication that an
obstacle is behind the vehicle.

CAUTION!

ParkSense is only a parking aid and it is unable to
recognize every obstacle, including small obsta -
cles. Parking curbs might be temporarily detected
or not detected at all. Obstacles located above or
below the sensors will not be detected when they
are in close proximity.

The vehicle must be driven slowly when using
ParkSense in order to be able to stop in time
when an obstacle is detected. It is recom -
mended that the driver looks over his/her
shoulder when using ParkSense.

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138SAFETY
ELECTRONIC BRAKE CONTROL (EBC)
S
YSTEM
Your vehicle is equipped with an advanced
Electronic Brake Control (EBC) system that
includes the Brake Assist System (BAS), Crosswind
Assist (CWA), Electronic Stability Control (ESC), Hill
Start Assist (HSA), Traction Control System (TCS),
and Trailer Sway Control (TSC). These systems
complement the Anti-Lock Brake System (ABS) by
optimizing the vehicle braking capability during
emergency braking maneuvers.
Brake Assist System (BAS)
The BAS is designed to optimize the vehicle’s
braking capability during emergency braking
maneuvers. The system detects an emergency
braking situation by sensing the rate and amount
of brake application and then applies optimum
pressure to the brakes. This can help reduce
braking distances. The BAS complements the
Anti-Lock Brake System (ABS). Applying the brakes
very quickly results in the best BAS assistance.
To receive the benefit of the system, you must
apply continuous braking pressure during the
stopping sequence (do not “pump” the brakes).
Do not reduce brake pedal pressure unless
braking is no longer desired. Once the brake pedal
is released, the BAS is deactivated.Crosswind Assist (CWA)

CWA helps keep your vehicle from drifting out of its lane
due to unexpected crosswinds by means of targeted
braking of individual wheels. The system will provide
automatic stability assistance to counteract the effect
of strong side wind. If a strong lateral wind is detected,
front and rear brakes on the affected side are applied,
creating a steering effect that mitigates the crosswind
influence. During system intervention, the driver should
perceive the natural stable handling feel of the vehicle.
Crosswind Assist will activate automatically when
the vehicle reaches speeds above approximately
43 mph (70 km/h). When the system is activated,
the ESC Warning Light in the instrument cluster will
blink to warn the driver.
Electronic Stability Control (ESC)
ESC enhances directional control and stability of
the vehicle under various driving conditions. ESC
corrects for over/under steering of the vehicle by
applying the brake of the appropriate wheel(s) to
counteract the above conditions. Engine power
may also be reduced to help the vehicle maintain
the desired path.
Oversteer – when the vehicle is turning more
than appropriate for the steering wheel position.
Understeer – when the vehicle is turning less
than appropriate for the steering wheel position.

ESC uses sensors in the vehicle to determine the
vehicle path intended by the driver and compares it to
the actual path of the vehicle. When the actual path
does not match the intended path, ESC applies the
brake of the appropriate wheel to assist in
counteracting the oversteer or understeer condition.

WARNING!

The Brake Assist System (BAS) cannot prevent the
natural laws of physics from acting on the vehicle,
nor can it increase the traction afforded by prevailing
road conditions. BAS cannot prevent collisions,
including those resulting from excessive speed in
turns, driving on very slippery surfaces, or
hydroplaning. The capabilities of a BAS-equipped
vehicle must never be exploited in a reckless or
dangerous manner, which could jeopardize the
user's safety or the safety of others.

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SAFETY141
Towing With HSA
HSA will also provide assistance to mitigate roll
back while towing a trailer.
Traction Control System (TCS)
TCS monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and
engine power is reduced, to provide enhanced
acceleration and stability. A feature of the TCS,
Brake Limited Differential (BLD) functions similarly to a limited slip differential and controls the wheel
spin across a driven axle. If one wheel on a driven
axle is spinning faster than the other, the system
will apply the brake of the spinning wheel. This will
allow more engine torque to be applied to the
wheel that is not spinning. This feature remains
active even if the ESC is in the “Partial Off” mode.
The ESC Activation/Malfunction Indicator Light (in
the instrument cluster) will start to flash as soon as
the tires lose traction and the wheels begin to spin.
This indicates that the TCS is active. If the indicator
light flashes during acceleration, ease up on the
accelerator and apply as little throttle as possible.
Be sure to adapt your speed and driving to the
prevailing road conditions, and do not switch off
the ESC or TCS.
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 110.
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.
WARNING!
If you use a trailer brake controller with your
trailer, the trailer brakes may be activated and
deactivated with the brake switch. If so, there
may not be enough brake pressure to hold
both the vehicle and the trailer on a hill when
the brake pedal is released. In order to avoid
rolling down an incline while resuming accel -
eration, manually activate the trailer brake or
apply more vehicle brake pressure prior to
releasing the brake pedal.

HSA is not a parking brake. Always apply the
parking brake fully when exiting your vehicle. Also,
be certain to place the transmission in PARK.

Failure to follow these warnings can result in a
collision or serious personal injury.
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.
6

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142SAFETY
AUXILIARY DRIVING SYSTEMS
BLIND SPOT MONITORING (BSM) —
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).
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.

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