brake sensor Ram 1500 2020 Owner's Manual

GETTING TO KNOW YOUR INSTRUMENT PANEL 187
tires or wheels on your vehicle to ensure that the replace-
ment or alternate tires and wheels allow the TPMS to
continue to function properly.
— Anti-Lock Brake (ABS) Warning Light
This warning light monitors the Anti-Lock Brake System
(ABS). The light will turn on when the ignition is placed in
the ON/RUN or ACC/ON/RUN position and may stay on
for as long as four seconds. If the ABS light remains on or turns on while driving, then
the Anti-Lock portion of the brake system is not functioning
and service is required as soon as possible. However, the
conventional brake system will continue to operate
normally, assuming the Brake Warning Light is not also on.
If the ABS light does not turn on when the ignition is placed
in the ON/RUN or ACC/ON/RUN position, have the brake
system inspected by an authorized dealer.
— Rear Axle Locker Fault Indicator Light — If
Equipped
This warning light will illuminate to indicate when a rear
axle locker fault has been detected.
— Service Forward Collision Warning (FCW) Light —
If Equipped
This warning light will illuminate to indicate a fault in the
Forward Collision Warning System. Contact an authorized
dealer for service.
Refer to “Forward Collision Warning (FCW) With Mitiga -
tion” in “Safety” for further information.
CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size equipped
on your vehicle. Undesirable system operation or sensor
damage may result when using replacement equipment
that is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor damage. Using
aftermarket tire sealants may cause the Tire Pressure
Monitoring System (TPMS) sensor to become
inoperable. After using an aftermarket tire sealant it is
recommended that you take your vehicle to your
authorized dealer to have your sensor function checked.
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SAFETY 201
it then applies the appropriate brake and may also reduce
engine power to lessen the chance that wheel lift will occur.
ERM can only reduce the chance of wheel lift occurring
during severe or evasive driving maneuvers; it cannot
prevent wheel lift due to other factors, such as road condi-
tions, leaving the roadway, or striking objects or other vehi -
cles.
NOTE:
ERM is disabled anytime the ESC is in “Full Off” mode (if
equipped). Refer to “Electronic Stability Control (ESC)” in
this section for a complete explanation of the available ESC
modes. Electronic Stability Control (ESC)
The Electronic Stability Control (ESC) system enhances
directional control and stability of the vehicle under various
driving conditions. ESC corrects for oversteering or under
-
steering of the vehicle by applying the brake of the appro -
priate wheel(s) to assist in counteracting the oversteer or
understeer condition. Engine power may also be reduced to
help the vehicle maintain the desired path.
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.
• Oversteer — when the vehicle is turning more than appro -
priate for the steering wheel position.
• Understeer — when the vehicle is turning less than appro -
priate for the steering wheel position.
The “ESC Activation/Malfunction Indicator Light” located
in the instrument cluster will start to flash as soon as the ESC
system becomes active. The “ESC Activation/Malfunction
Indicator Light” also flashes when the TCS is active. If the
“ESC Activation/Malfunction Indicator Light” begins to
WARNING!
Many factors, such as vehicle loading, road conditions
and driving conditions, influence the chance that wheel
lift or rollover may occur. ERM cannot prevent all wheel
lift or roll overs, especially those that involve leaving the
roadway or striking objects or other vehicles. The
capabilities of an ERM-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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210 SAFETY

6. Push the “ESC Off” button located in the lower switch bankbelow the climate control four times within 20 seconds. The
“ESC Off Indicator Light” should turn on and turn off two
times.

7. Rotate the steering wheel back to center and then an addi -
tional slightly more than one-half turn to the right.
8. Turn the ignition to the OFF mode and then back to ON. If the sequence was completed properly, the “ESC Off
Indicator Light” will blink several times to confirm HSA
is disabled.
9. Repeat these steps if you want to return this feature to its previous setting.
Traction Control System (TCS)
The Traction Control System (TCS) monitors the amount of
wheel spin of each of the driven wheels. If wheel spin is
detected, the TCS may apply brake pressure to the spinning
wheel(s) and/or reduce engine power to provide enhanced
acceleration and stability. A feature of the TCS, Brake
Limited Differential (BLD), functions similar 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. BLD may remain enabled even if TCS and
ESC are in a reduced mode.
Trailer Sway Control (TSC)
Trailer Sway Control (TSC) uses sensors in the vehicle to
recognize an excessively swaying trailer and will take the
appropriate actions to attempt to stop the sway. TSC will
become active automatically once an excessively swaying
trailer is recognized.
NOTE:
TSC cannot stop all trailers from swaying. Always use
caution when towing a trailer and follow the trailer tongue
weight recommendations. Refer to “Trailer Towing” in
“Starting And Operating” for further information.
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” or “Full
Off” modes.
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.
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222 SAFETY
La operación de este equipo está sujeta a las siguientes dos
condiciones:
1. es posible que este equipo o dispositivo no cause interfer-
encia perjudicial y
2. este equipo o dispositivo debe aceptar cualquier interfer- encia, incluyendo la que pueda causar su operación no
deseada.
NOTE:
Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.
Forward Collision Warning (FCW) With Mitigation — If
Equipped
The Forward Collision Warning (FCW) with Mitigation
system provides the driver with audible warnings, visual
warnings (within the instrument cluster display), and may
apply a brake jerk to warn the driver when it detects a poten -
tial frontal collision. The warnings and limited braking are
intended to provide the driver with enough time to react,
avoid or mitigate the potential collision. NOTE:
FCW monitors the information from the forward looking
sensors as well as the Electronic Brake Controller (EBC), to
calculate the probability of a forward collision. When the
system determines that a forward collision is probable, the
driver will be provided with audible and visual warnings as
well as a possible brake jerk warning.
If the driver does not take action based upon these progres
-
sive warnings, then the system will provide a limited level of
active braking to help slow the vehicle and mitigate the
potential forward collision. If the driver reacts to the warn -
ings by braking and the system determines that the driver
intends to avoid the collision by braking but has not applied
sufficient brake force, the system will compensate and
provide additional brake force as required.
If a FCW with Mitigation event begins at a speed below
32 mph (52 km/h), the system may provide the maximum braking possible to mitigate the potential forward collision.
If the Forward Collision Warning with Mitigation event
stops the vehicle completely, the system will hold the vehicle
at standstill for two seconds and then release the brakes.
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340 STARTING AND OPERATING
To Accelerate For Passing
Press the accelerator as you would normally. When the pedal
is released, the vehicle will return to the set speed.
To Resume Speed
To resume a previously set speed, push the RES button and
release. Resume can be used at any speed above 20 mph
(32 km/h).
To Deactivate
A soft tap on the brake pedal, pushing the CANC (cancel)
button, or normal brake pressure while slowing the vehicle
will deactivate the speed control without erasing the set
speed from memory.
Pushing the on/off button or placing the ignition in the OFF
position, erases the set speed from memory.
Using Speed Control On Hills
The transmission may downshift on hills to maintain the
vehicle set speed.
NOTE:
The Speed Control system maintains speed up and down
hills. A slight speed change on moderate hills is normal.On steep hills, a greater speed loss or gain may occur so it
may be preferable to drive without Speed Control.
ADAPTIVE CRUISE CONTROL (ACC) — IF EQUIPPED
Adaptive Cruise Control (ACC) increases the driving conve
-
nience provided by cruise control while traveling on high -
ways and major roadways. However, it is not a safety system
and not designed to prevent collisions. Speed Control func-
tion performs differently. Please refer to the proper section
within this chapter.
ACC will allow you to keep cruise control engaged in light
to moderate traffic conditions without the constant need to
reset your cruise control. ACC utilizes a radar sensor and a
forward facing camera designed to detect a vehicle directly
ahead of you.
NOTE:
• If the sensor does not detect a vehicle ahead of you, ACC will maintain a fixed set speed.
• If the ACC sensor detects a vehicle ahead, ACC will apply limited braking or accelerate (not to exceed the original set
speed) automatically to maintain a preset following
distance, while matching the speed of the vehicle ahead.
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350 STARTING AND OPERATING
Distance Setting 1 Bar (Short)
To increase the distance setting, push the Distance Setting —
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 Setting —
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 “Sensed Vehicle Indicator”
icon, 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. (Refer to the information on ACC Activation).
The maximum braking applied by ACC is limited; however,
the driver can always apply the brakes manually, if neces -
sary.
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.
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368 STARTING AND OPERATING
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
The Front and Rear chime volume settings are program-
mable.
• The settings may be programmed through the Uconnect System. Refer to “Uconnect Settings ” in “Multimedia” for
further information.
Enabling And Disabling Front And/Or Rear ParkSense
Front ParkSense can be enabled and disabled with the Front
ParkSense switch.
Rear ParkSense can be enabled and disabled with the Rear
ParkSense switch.
When the Front or Rear ParkSense switch is pushed
to disable the system, the instrument cluster display
will show a vehicle graphic of the Front or Rear Park-
Sense on/off state for two seconds. Refer to “Instrument
Cluster Display” in “Getting To Know Your Instrument
Panel” for further information. When the gear selector is moved to REVERSE and the Front
or Rear system is disabled, the instrument cluster display
will show a vehicle graphic with "OFF" on the corresponding
side. This vehicle graphic will be displayed for as long as the
vehicle is in REVERSE.
NOTE:
Arc alerts from the enabled ParkSense system, will interrupt
the five second messages, and the instrument cluster display
will show the vehicle graphic with the corresponding arcs
and "OFF" message.
The Front or Rear ParkSense switch LED will be on when
Front or Rear ParkSense is disabled or requires service. The
Front or Rear ParkSense switch LED will be off when the
Front or Rear system is enabled. If the Front or Rear Park
-
Sense switch is pushed, and the system requires service, the
Front or Rear ParkSense switch LED will blink momentarily,
and then the LED will be on.
Service The ParkSense Park Assist System
During vehicle start up, when the ParkSense System has
detected a faulted condition, the instrument cluster will
actuate a single chime, once per ignition cycle, and it will
display the "PARKSENSE UNAVAILABLE WIPE REAR
SENSORS", "PARKSENSE UNAVAILABLE WIPE FRONT
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STARTING AND OPERATING 371
PARKSENSE ACTIVE PARK ASSIST SYSTEM — IF
EQUIPPED
The ParkSense Active Park Assist system is intended to assist
the driver during parallel and perpendicular parking
maneuvers by identifying a proper parking space, providing
audible/visual instructions, and controlling the steering
wheel. The ParkSense Active Park Assist system is defined as
“semi-automatic” since the driver maintains control of the
accelerator, gear selector and brakes. Depending on the
driver's parking maneuver selection, the ParkSense ActivePark Assist system is capable of maneuvering a vehicle into
a parallel or a perpendicular parking space on either side
(i.e., driver side or passenger side).
NOTE:
• The driver is always responsible for controlling the
vehicle, responsible for any surrounding objects, and must
intervene as required.
• The system is provided to assist the driver and not to substitute the driver.
• During a semi-automatic maneuver, if the driver touches the steering wheel after being instructed to remove their
hands from the steering wheel, the system will cancel, and
the driver will be required to manually complete the
parking maneuver.
• The system may not work in all conditions (e.g. environ -
mental conditions such as heavy rain, snow, etc., or if
searching for a parking space that has surfaces that will
absorb the ultrasonic sensor waves).
• New vehicles from the dealership must have at least 30 miles (48 km) accumulated before the ParkSense Active
Park Assist system is fully calibrated and performs accu -
rately. This is due to the system’s dynamic vehicle calibra -
CAUTION!
• ParkSense is only a parking aid and it is unable to recognize every obstacle, including small obstacles.
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 Park -
Sense in order to be able to stop in time when an
obstacle is detected. It is recommended that the driver
looks over his/her shoulder when using ParkSense.
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