2021 RAM PROMASTER CITY wiring

72STARTING AND OPERATING
(Continued)
ParkSense Rear Park Assist Failure
Indications
A malfunction of the ParkSense 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 on the
instrument cluster display (if
equipped) Ú page 49.
The sensors and wiring are tested continuously
when the ignition is in the MAR (ACC/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 system is unavailable, without
reference to the sensor in failure condition. If
even a single sensor fails, the entire system will
be disabled. The system is turned off
automatically.
Cleaning The ParkSense Rear Park Assist
System
Clean the ParkSense sensors with water, car
wash soap and a soft cloth. Do not use rough or
hard cloths. In washing stations, clean sensors
quickly while keeping the vapor jet/high
pressure washing nozzles at least 4 inches
(10 cm) from the sensors. Do not scratch or
poke the sensors. Otherwise, you could damage
the sensors.
ParkSense Rear Park Assist System Usage
Precautions
NOTE:
Ensure that the outer surface and the under -
side of the rear fascia/bumper is clean and
clear of snow, ice, mud, dirt or other obstruc -
tion to keep the ParkSense Rear Park Assist
system operating properly.
Jackhammers, large trucks, and other vibra -
tions could affect the performance of the
ParkSense system.
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 prop
-
erly. The ParkSense system might not detect
an obstacle behind the fascia/bumper, or it
could provide a false indication that an
obstacle is behind the fascia/bumper.
Objects such as bicycle carriers, etc., must
not be placed within 12 inches (30 cm) from
the rear fascia/bumper while driving the
vehicle. Failure to do so can result in the
system misinterpreting a close object as a
sensor problem, causing a failure indication
to be displayed in the instrument cluster
display.
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.

21_VM_OM_EN_USC_t.book Page 72

STARTING AND OPERATING81
Towing Requirements — Trailer Brakes
Do not interconnect the hydraulic brake
system or vacuum system of your vehicle
with that of the trailer. This could cause inad -
equate braking and possible personal injury.
An electronically actuated trailer brake
controller is required when towing a trailer
with electronically actuated brakes. When
towing a trailer equipped with a hydraulic
surge actuated brake system, an electronic
brake controller is not required.
Trailer brakes are recommended for trailers
over 1,000 lbs (453 kg) and required for
trailers in excess of 2,000 lbs (907 kg).
Towing Requirements — Trailer Lights And
Wiring
Whenever you pull a trailer, regardless of the
trailer size, stoplights and turn signals on the
trailer are required for motoring safety.
The Trailer Tow Package may include a four- and
seven-pin wiring harness. Use a factory
approved trailer harness and connector.
NOTE:
Do not cut or splice wiring into the vehicle’s
wiring harness.
The electrical connections are all complete to
the vehicle but you must mate the harness to a
trailer connector. Refer to the following
illustrations. NOTE:
Disconnect trailer wiring connector from the
vehicle before launching a boat (or any other
device plugged into vehicle’s electrical
connect) into water.
Be sure to reconnect once clear from water
area.

Four-Pin Connector

WARNING!
Do not connect trailer brakes to your
vehicle's hydraulic brake lines. It can over -
load your brake system and cause it to fail.
You might not have brakes when you need
them and could have an accident.
Towing any trailer will increase your stop -
ping distance. When towing, you should
allow for additional space between your
vehicle and the vehicle in front of you.
Failure to do so could result in an accident.
CAUTION!

If the trailer weighs more than 1,000 lbs
(453 kg) loaded, it should have its own
brakes and they should be of adequate
capacity. Failure to do this could lead to
accelerated brake lining wear, higher brake
pedal effort, and longer stopping distances.

1 — Ground
2 — Park
3 — Left Stop/Turn
4 — Right Stop/Turn
4

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SAFETY161
Supplemental Restraint Systems (SRS)
Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on
others. If you are not sure, ask an authorized
dealer.
The air bag system must be ready to protect you
in a collision. The Occupant Restraint Controller
(ORC) monitors the internal circuits and
interconnecting wiring associated with the
electrical Air Bag System Components. Your
vehicle may be equipped with the following Air
Bag System Components:
Air Bag System Components
Occupant Restraint Controller (ORC)
Air Bag Warning Light
Steering Wheel and Column
Instrument Panel
Knee Impact Bolsters
Driver and Front Passenger Air Bags
Seat Belt Buckle Switch
Supplemental Side Air Bags
Supplemental Knee Air Bags
Front and Side Impact Sensors
Seat Belt Pretensioners
Air Bag Warning Light
The Occupant Restraint Controller
(ORC) monitors the readiness of the
electronic parts of the air bag system
whenever the ignition switch is in the
AVV/START or MAR/ACC/ON/RUN position. If
the ignition switch is in the STOP/OFF/LOCK
position the air bag system is not on and the air
bags will not inflate. The ORC contains a backup power supply
system that may deploy the air bag system even
if the battery loses power or it becomes
disconnected prior to deployment.
The ORC turns on the Air Bag Warning Light in
the instrument panel for approximately four to
eight seconds for a self-check when the ignition
switch is in the MAR/ACC/ON/RUN position.
After the self-check, the Air Bag Warning Light
will turn off. If the ORC detects a malfunction in
any part of the system, it turns on the Air Bag
Warning Light, either momentarily or
continuously. A single chime will sound to alert
you if the light comes on again after initial
startup.
The ORC also includes diagnostics that will
illuminate the instrument panel Air Bag Warning
Light if a malfunction is detected that could
affect the air bag system. The diagnostics also
record the nature of the malfunction. While the
air bag system is designed to be maintenance
free, if any of the following occurs, have an
authorized dealer service the air bag system
immediately.
Failure to replace the seat belt assembly
could increase the risk of injury in colli
-
sions.
Do not use the Automatic Locking Mode to
restrain occupants who are wearing the
seat belt or children who are using booster
seats. The locked mode is only used to
install rear-facing or forward-facing child
restraints that have a harness for
restraining the child.
WARNING! (Continued)
6

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SAFETY167
Air Bag System Components
NOTE:
The Occupant Restraint Controller (ORC) moni -
tors the internal circuits and interconnecting
wiring associated with electrical Air Bag System
Components listed below:
Occupant Restraint Controller (ORC)
Air Bag Warning Light
Steering Wheel and Column
Instrument Panel
Knee Impact Bolsters
Driver and Front Passenger Air Bags
Seat Belt Buckle Switch
Supplemental Side Air Bags
Supplemental Knee Air Bags
Front and Side Impact Sensors
Seat Belt Pretensioners
If A Deployment Occurs
The front air bags are designed to deflate
immediately after deployment.
NOTE:
Front and/or side air bags will not deploy in all
collisions. This does not mean something is
wrong with the air bag system.
If you do have a collision which deploys the air
bags, any or all of the following may occur:
The air bag material may sometimes cause
abrasions and/or skin reddening to the occu -
pants as the air bags deploy and unfold. The
abrasions are similar to friction rope burns or
those you might get sliding along a carpet or
gymnasium floor. They are not caused by
contact with chemicals. They are not perma -
nent and normally heal quickly. However, if
you haven’t healed significantly within a few
days, or if you have any blistering, see your
doctor immediately.
As the air bags deflate, you may see some
smoke-like particles. The particles are a
normal by-product of the process that gener -
ates the non-toxic gas used for air bag infla -
tion. These airborne particles may irritate the
skin, eyes, nose, or throat. If you have skin or eye irritation, rinse the area with cool water.
For nose or throat irritation, move to fresh air.
If the irritation continues, see your doctor. If
these particles settle on your clothing, follow
the garment manufacturer’s instructions for
cleaning.
Do not drive your vehicle after the air bags have
deployed. If you are involved in another
collision, the air bags will not be in place to
protect you.
NOTE:Air bag covers may not be obvious in the inte -
rior trim, but they will open during air bag
deployment.
After any collision, the vehicle should be
taken to an authorized dealer immediately.
WARNING!
Deployed air bags and seat belt
pretensioners cannot protect you in another
collision. Have the air bags, seat belt
pretensioners, and the seat belt retractor
assemblies replaced by an authorized dealer
immediately. Also, have the Occupant
Restraint Controller System serviced as well.
6

21_VM_OM_EN_USC_t.book Page 167

SAFETY169
(Continued)
Maintaining Your Air Bag System Event Data Recorder (EDR)
This vehicle is equipped with an event data
recorder (EDR). The main purpose of an EDR is
to record, in certain crash or near crash-like
situations, such as an air bag deployment or
hitting a road obstacle, data that will assist in
understanding how a vehicle’s systems
performed. The EDR is designed to record data related to vehicle dynamics and safety systems
for a short period of time, typically 30 seconds
or less. The EDR in this vehicle is designed to
record such data as:
How various systems in your vehicle were
operating;
Whether or not the driver and passenger
safety belts were buckled/fastened;
How far (if at all) the driver was depressing
the accelerator and/or brake pedal; and,
How fast the vehicle was traveling.
This data can help provide a better
understanding of the circumstances in which
crashes and injuries occur.
NOTE:
EDR data are recorded by your vehicle only if a
non-trivial crash situation occurs; no data are
recorded by the EDR under normal driving
conditions and no personal data (e.g., name,
gender, age, and crash location) are recorded.
However, other parties, such as law enforce -
ment, could combine the EDR data with the type
of personally identifying data routinely acquired
during a crash investigation.
WARNING!
Modifications to any part of the air bag
system could cause it to fail when you need
it. You could be injured if the air bag system
is not there to protect you. Do not modify
the components or wiring, including adding
any kind of badges or stickers to the
steering wheel hub trim cover or the upper
passenger side of the instrument panel. Do
not modify the front fascia/bumper, vehicle
body structure, or add aftermarket side
steps or running boards.
It is dangerous to try to repair any part of
the air bag system yourself. Be sure to tell
anyone who works on your vehicle that it
has an air bag system.
Do not attempt to modify any part of your
air bag system. The air bag may inflate acci -
dentally or may not function properly if
modifications are made. Take your vehicle
to an authorized dealer for any air bag
system service. If your seat, including your
trim cover and cushion, needs to be
serviced in any way (including removal or
loosening/tightening of seat attachment
bolts), take the vehicle to an authorized
dealer. Only manufacturer approved seat
accessories may be used. If it is necessary
to modify the air bag system for persons
with disabilities, contact an authorized
dealer.
WARNING! (Continued)
6

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272
T
Telescoping Steering Column
.......................... 23Tie Down Hooks, Cargo.................................... 38Tilt Steering Column........................................ 23Tire And Loading Information Placard........... 239Tire Markings................................................. 234Tire Safety Information.................................. 234Tire Service Kit.............................................. 202Tires................................... 187, 242, 247, 250Aging (Life Of Tires)................................... 245Air Pressure............................................... 242Chains....................................................... 249Changing................................................... 194Compact Spare......................................... 247General Information........................ 242, 247High Speed................................................ 243Inflation Pressure...................................... 242Jacking...................................................... 194Life Of Tires............................................... 245Load Capacity............................................ 239Pressure Monitoring System (TPMS).. 53, 149Quality Grading.......................................... 250Radial........................................................ 243Replacement............................................. 245Rotation.................................................... 250Safety.............................................. 234, 242Sizes.......................................................... 235Snow Tires................................................. 246Spare Tires...................................... 247, 248Spinning.................................................... 244
Trailer Towing.............................................. 80Tread Wear Indicators.............................. 244Wheel Nut Torque..................................... 255To Open Hood.................................................. 37Tongue Weight/Trailer Weight......................... 79Towing............................................................. 77Disabled Vehicle....................................... 211Guide........................................................... 79Recreational................................................ 83Weight......................................................... 79Towing Behind A Motorhome........................... 83Traction............................................................ 84Traction Control............................................ 149Trailer Sway Control (TSC)............................. 149Trailer Towing.................................................. 77Hitches........................................................ 78Minimum Requirements.............................. 79Tips.............................................................. 82Trailer And Tongue Weight........................... 79Wiring.......................................................... 81Trailer Towing Guide........................................ 79Trailer Weight................................................... 79Transmission................................................... 63Automatic....................................62, 63, 231Fluid......................................................... 261Maintenance............................................ 231Transporting Pets.......................................... 184Tread Wear Indicators.................................. 244Trip Computer.................................................. 48Turn Signals..................................................... 55
U
Uconnect Phone Call Features
................................. 116Things You Should Know About Your Uconnect Phone................................... 119Uconnect Phone..........................111, 112, 113Answer Or Ignore An Incoming Call — Call Currently In Progress..................... 117Answer Or Ignore An Incoming Call — No Call Currently In Progress................ 117Bluetooth Communication Link................ 121Call Continuation...................................... 118Call Controls............................................. 116Call Termination....................................... 118Cancel Command..................................... 111Connecting To A Particular Mobile Phone Or Audio Device After Pairing................ 114Help Command......................................... 111Join Calls.................................................. 118Making A Phone Or Audio Device AFavorite................................................ 114Making A Second Call While Current Call Is In Progress................................. 118Managing Your Favorites.......................... 115Natural Speech......................................... 111Operation.................................................. 110Overview................................................... 109Pair (Link) Uconnect Phone To A Mobile Phone................................................... 112

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