2020 Ram ProMaster City brakes

88 GETTING TO KNOW YOUR INSTRUMENT PANEL
Seat Belt Reminder Warning Light When the ignition is first placed in the ON/RUN or
MAR/ON/RUN position, if the driver’s seat belt is
unbuckled, a chime will sound and the light will
turn on. When driving, if the driver or front passenger seat
belt remains unbuckled, the Seat Belt Reminder Light will
flash or remain on continuously and a chime will sound.
Refer to “Occupant Restraint Systems” in “Safety” for
further information.
Transmission Fault Warning Light
This light will illuminate (together with a message in
the instrument cluster display and a buzzer) to indi -
cate a transmission fault. Contact your authorized
dealer if the message remains after restarting the engine. Engine Oil Level Warning Light
This warning light appears on the panel when the
engine oil level falls below the minimum recom -
mended value. Restore the correct engine oil level or
contact your authorized dealer for service.
Yellow Warning Lights
Anti-Lock Brake System (ABS) Warning Light

This light monitors the Anti-Lock Brake System (ABS).
The light will turn on when the ignition is placed in the
ON/RUN or MAR/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. However, the conventional brake
system will continue to operate normally if the brake
warning light is not on.
If the ABS light is on, the brake system should be serviced as
soon as possible to restore the benefits of Anti-Lock Brakes.
If the ABS light does not turn on when the ignition is placed
in the ON/RUN or MAR/ON/RUN position, have the light
inspected by an authorized dealer.
CAUTION!
Continuous driving with the Transmission Temperature
Warning Light illuminated will eventually cause severe
transmission damage or transmission failure.
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 88

97
(Continued)
SAFETY
SAFETY FEATURES
Four-Wheel Anti-Lock Brake System (ABS)
The Four-Wheel Anti-Lock Brake System (ABS) is designed
to aid the driver in maintaining vehicle control under
adverse braking conditions. The system operates with a
separate computer to modulate hydraulic pressure, to
prevent wheel lock-up and to help avoid skidding on
slippery surfaces.
The system's pump motor runs during an ABS stop to
provide regulated hydraulic pressure. The pump motor
makes a low humming noise during operation, which is
normal.
The ABS includes an amber ABS Warning Light. When the
light is illuminated, the ABS is not functioning. The system
reverts to standard non-anti-lock brakes. Turning the igni-
tion OFF and ON again may reset the ABS if the fault
detected was only momentary.
WARNING!
• The ABS contains sophisticated electronic equipment that may be susceptible to interference caused by
improperly installed or high output radio transmitting
equipment. This interference can cause possible loss of
anti-lock braking capability. Installation of such equip -
ment should be performed by qualified professionals.
• Pumping of the Anti-Lock Brakes will diminish their effectiveness and may lead to a collision. Pumping
makes the stopping distance longer. Just press firmly
on your brake pedal when you need to slow down or
stop.
• The ABS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase braking
or steering efficiency beyond that afforded by the
condition of the vehicle brakes and tires or the traction
afforded.
4
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 97

98 SAFETY
When you are in a severe braking condition involving the
use of the ABS, you will experience some pedal drop as the
vehicle comes to a stop. This is the result of the system
reverting to the base brake system.
Engagement of the ABS may be accompanied by a pulsing
sensation. You may also hear a clicking noise. These occur-
rences are normal and indicate that the system is functioning
properly.
Electronic Brake Control (EBC) System
Your vehicle is equipped with an advanced Electronic Brake
Control (EBC) system that includes the Brake Assist System
(BAS), Traction Control System (TCS), Hill Start Assist
(HSA), Electronic Stability Control (ESC), Electronic Roll
Mitigation (ERM) and Trailer Sway Control (TSC). All
systems work together to enhance vehicle stability and
control in various driving conditions and are commonly
referred to as ESC.
Brake Assist System (BAS)
The Brake Assist System (BAS) is designed to optimize the
vehicle’s braking capability during emergency braking
maneuvers. The system detects an emergency braking situa -
tion 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.
• The ABS cannot prevent collisions, including those
resulting from excessive speed in turns, following
another vehicle too closely, or hydroplaning.
• The capabilities of an ABS equipped vehicle must never be exploited in a reckless or dangerous manner
that could jeopardize the user’s safety or the safety of
others.
WARNING! (Continued)
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 98

102 SAFETY
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, brake pressure is applied to the slipping wheel(s)
and engine power is reduced to provide enhanced accelera-
tion and stability. A feature of the TCS system, Brake Limited
Differential (BLD), functions similar to a limited slip differ -
ential 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 TCS and
ESC are in the Partial Off mode. Refer to “Electronic Stability
Control (ESC)” in this section for further information. Trailer Sway Control (TSC) — If Equipped
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. The system
may reduce engine power and apply the brake of the appro
-
priate wheel(s) to counteract the sway of the trailer. 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” mode.
WARNING!
There may be situations on minor hills with a loaded
vehicle, or while pulling a trailer, when the system will
not activate and slight rolling may occur. This could
cause a collision with another vehicle or object. Always
remember the driver is responsible for braking the
vehicle.
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.
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 102

164 STARTING AND OPERATING
Key Ignition Park Interlock
This vehicle is equipped with a Key Ignition Park Interlock
which requires the transmission to be in PARK before the
ignition can be turned to the full STOP (OFF/LOCK) (key
removal) position. The key can only be removed from the
ignition when the ignition is in the STOP (OFF/LOCK) posi-
tion, and once removed, the transmission is locked in PARK.
Brake/Transmission Shift Interlock System
This vehicle is equipped with a Brake Transmission Shift
Interlock system (BTSI) that holds the transmission gear
selector in PARK unless the brakes are applied. To shift the
transmission out of PARK, the ignition must be in the MAR/
RUN mode (engine running or not) and the brake pedal
must be pressed.
The brake pedal must also be pressed to shift from
NEUTRAL into DRIVE or REVERSE when the vehicle is
stopped or moving at low speeds.
Nine-Speed Automatic Transmission
The transmission gear range (PRND) is displayed both
beside the gear selector and in the instrument cluster. To
select a gear range, press the lock button on the gear selector
and move the lever rearward or forward. You must also press the brake pedal to shift the transmission out of PARK
(or NEUTRAL, when the vehicle is stopped or moving at low
speeds). Select the DRIVE range for normal driving.
NOTE:
In the event of a mismatch between the gear selector position
and the actual transmission gear (for example, driver selects
REVERSE while driving forward), the position indicator will
blink continuously until the selector is returned to the proper
position, or the requested shift can be completed.
The electronically-controlled transmission adapts its shift
schedule based on driver inputs, along with environmental
and road conditions. The transmission electronics are
self-calibrating; therefore, the first few shifts on a new
vehicle may be somewhat abrupt. This is a normal condition,
and precision shifts will develop within a few hundred miles
or kilometers.
The nine-speed transmission has been developed to meet the
needs of current and future FWD/AWD vehicles. Software
and calibration is refined to optimize the customer’s driving
experience and fuel economy. By design, some vehicle and
driveline combinations utilize 9th gear only in very specific
driving situations and conditions.
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 164

184 STARTING AND OPERATING
Figure out the weight on the front and rear of the vehicle
separately. It is important that you distribute the load evenly
over the front and rear axles.
Overloading can cause potential safety hazards and shorten
useful service life. Heavier axles or suspension components
do not necessarily increase the vehicle's GVWR.
Loading
To load your vehicle properly, first figure out its empty
weight, axle-by-axle and side-by-side. Store heavier items
down low and be sure you distribute their weight as evenly
as possible. Stow all loose items securely before driving. If
weighing the loaded vehicle shows that you have exceeded
either GAWR, but the total load is within the specified
GVWR, you must redistribute the weight. Improper weight
distribution can have an adverse effect on the way your
vehicle steers and handles and the way the brakes operate.
NOTE:
Refer to the “Vehicle Certification Label” affixed to the
B-Pillar or the rear of the driver's door for your vehicle's
GVWR and GAWRs.
TRAILER TOWING
In this section you will find safety tips and information on
limits to the type of towing you can reasonably do with your
vehicle. Before towing a trailer, carefully review this infor-
mation to tow your load as efficiently and safely as possible.
To maintain the New Vehicle Limited Warranty coverage,
follow the requirements and recommendations in this
manual concerning vehicles used for trailer towing.
Common Towing Definitions
The following trailer towing related definitions will assist
you in understanding the following information:
Gross Vehicle Weight Rating (GVWR)
The GVWR is the total allowable weight of your vehicle. This
includes driver, passengers, cargo and tongue weight. The
total load must be limited so that you do not exceed the
GVWR. Refer to “Vehicle Loading/Vehicle Certification
Label” in this chapter for further information.
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 184

186 STARTING AND OPERATING
If equipped, the electronic Trailer Sway Control (TSC) recog-
nizes a swaying trailer and automatically applies individual
wheel brakes and/or reduces engine power to attempt to
eliminate the trailer sway.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue weight,
just as if it were luggage located at a hitch ball or some other
connecting point of the vehicle. These kinds of hitches are the
most popular on the market today and they are commonly
used to tow small and medium sized trailers.
Weight-Distributing Hitch
The weight-distributing hitch works by applying leverage
through spring (load) bars. They are typically used for
heavier loads to distribute trailer tongue weight to the tow
vehicle's front axle and the trailer axle(s). When used in
accordance with the manufacturer's directions, it provides
for a more level ride, offering more consistent steering and
brake control thereby enhancing towing safety. The addition
of a friction/hydraulic sway control also dampens sway caused by traffic and crosswinds and contributes positively
to tow vehicle and trailer stability. Trailer sway control and
a weight distributing (load equalizing) hitch are recom
-
mended for heavier Tongue Weights (TW) and may be
required depending on vehicle and trailer configuration/
loading to comply with Gross Axle Weight Rating (GAWR)
requirements.
WARNING!
• An improperly adjusted Weight Distributing Hitch system may reduce handling, stability, braking perfor -
mance, and could result in a collision.
• Weight Distributing Systems may not be compatible with Surge Brake Couplers. Consult with your hitch
and trailer manufacturer or a reputable Recreational
Vehicle dealer for additional information.
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 186

190 STARTING AND OPERATING
(Continued)
WARNING!
• Make certain that the load is secured in the trailer and will not shift during travel. When trailering cargo that
is not fully secured, dynamic load shifts can occur that
may be difficult for the driver to control. You could lose
control of your vehicle and have a collision.
• When hauling cargo or towing a trailer, do not overload your vehicle or trailer. Overloading can cause a loss of
control, poor performance or damage to brakes, axle,
engine, transmission, steering, suspension, chassis
structure or tires.
• Safety chains must always be used between your vehicle and trailer. Always connect the chains to the
hook retainers of the vehicle hitch. Cross the chains
under the trailer tongue and allow enough slack for
turning corners.
• Vehicles with trailers should not be parked on a grade.When parking, apply the parking brake on the tow
vehicle. Put the tow vehicle transmission in PARK. For
four-wheel drive vehicles, make sure the transfer case
is not in NEUTRAL. Always, block or "chock" the
trailer wheels.
• GCWR must not be exceeded.
• Total weight must be distributed between the tow vehicle and the trailer such that the following four
ratings are not exceeded:
• GVWR
• GTW
• GAWR
• Tongue weight rating for the trailer hitch utilized.
WARNING! (Continued)
2020_RAM_PROMASTER_CITY_OM_USA=GUID-7B6A7FCA-79B0-423F-95C5-ED2A949C3D13=1=en=.book Page 190