2020 Ram 1500 inflation pressure

8
LANESENSE — IF EQUIPPED ...................................... 391
LaneSense Operation .................................................. 391
Turning LaneSense On Or Off ................................... 391
LaneSense Warning Message .................................... 392
Changing LaneSense Status ....................................... 395
 PARKVIEW REAR BACK UP CAMERA ...................... 396
 SURROUND VIEW CAMERA SYSTEM — IF
EQUIPPED ......................................................................... 398
 REFUELING THE VEHICLE .......................................... 403
 VEHICLE LOADING ....................................................... 405
Gross Vehicle Weight Rating (GVWR) .................... 405
Payload.......................................................................... 405
Gross Axle Weight Rating (GAWR) ......................... 406
Tire Size......................................................................... 406
Rim Size ........................................................................ 406
Inflation Pressure......................................................... 406
Curb Weight ................................................................. 406
Loading ......................................................................... 406
 TRAILER TOWING .......................................................... 407
Common Towing Definitions .................................... 407
Trailer Hitch Type and Maximum Trailer
Weight ........................................................................... 411
Trailer Towing Weights (Maximum Trailer Weight
Ratings) ......................................................................... 413
Trailer And Tongue Weight .......................................413
Towing Requirements ................................................413
Towing Tips .................................................................420
 SNOWPLOW .................................................................... 421
 RECREATIONAL TOWING (BEHIND MOTORHOME,
ETC.) ...................................................................................422
Towing This Vehicle Behind Another Vehicle ........422
Recreational Towing — Two-Wheel Drive
Models ...........................................................................423
Recreational Towing — Four-Wheel Drive
Models ...........................................................................423
 DRIVING TIPS ...................................................................427
Driving On Slippery Surfaces ...................................427
Driving Through Water .............................................427
Off-Road Driving Tips ................................................429
IN CASE OF EMERGENCY
HAZARD WARNING FLASHERS................................. 431
 ASSIST AND SOS SYSTEM — IF EQUIPPED ..............431
 BULB REPLACEMENT ....................................................436
Replacement Bulbs ......................................................436
Replacing Exterior Bulbs ............................................438
2020_DT_1500_OM_US.book Page 8

186 GETTING TO KNOW YOUR INSTRUMENT PANEL
Should one or more tires be in the condition mentioned
above, the display will show the indications corresponding
to each tire.
Each tire, including the spare (if provided), should be
checked monthly when cold and inflated to the inflation
pressure recommended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pressure for those
tires.)
As an added safety feature, your vehicle has been equipped
with a Tire Pressure Monitoring System (TPMS) that illumi-
nates a low tire pressure telltale when one or more of your
tires is significantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly under-inflated
tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire tread
life, and may affect the vehicle’s handling and stopping
ability.
Please note that the TPMS is not a substitute for proper tire
maintenance, and it is the driver’s responsibility to maintain
correct tire pressure, even if under-inflation has not reached
the level to trigger illumination of the TPMS low tire pres
-
sure telltale.
Your vehicle has also been equipped with a TPMS malfunc -
tion indicator to indicate when the system is not operating
properly. The TPMS malfunction indicator is combined with
the low tire pressure telltale. When the system detects a
malfunction, the telltale will flash for approximately one
minute and then remain continuously illuminated. This
sequence will continue upon subsequent vehicle start-ups as
long as the malfunction exists. When the malfunction indi -
cator is illuminated, the system may not be able to detect or
signal low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the installation
of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS from functioning properly. Always check
the TPMS malfunction telltale after replacing one or more
CAUTION!
Do not continue driving with one or more flat tires as
handling may be compromised. Stop the vehicle,
avoiding sharp braking and steering. If a tire puncture
occurs, repair immediately using the dedicated tire
repair kit and contact an authorized dealer as soon as
possible.
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SAFETY 227
Tire Pressure Monitoring System (TPMS)
The Tire Pressure Monitoring System (TPMS) will warn the
driver of a low tire pressure based on the vehicle recom-
mended cold placard pressure.
NOTE:
The TPMS Warning Light will illuminate in the instrument
cluster and a chime will sound when tire pressure is low in
one or more of the four active road tires. In addition, the
instrument cluster will display a graphic showing the pres -
sure values of each tire with the low tire pressure values in a
different color, or the Uconnect radio will display a TPMS
message, when this occurs you must increase the tire pres -
sure to the recommended cold placard pressure in order for
the TPMS Warning Light to turn off.
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.
Refer to “Tires” in “Servicing And Maintenance” for infor -mation on how to properly inflate the vehicle’s tires. The tire
pressure will also increase as the vehicle is driven - this is
normal and there should be no adjustment for this increased
pressure.
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 pres
-
sure 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 TPMS Warning Light illumi -
nates, 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.
4
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228 SAFETY
(Continued)
NOTE:
When filling warm tires, the tire pressure may need to be
increased up to an additional 4 psi (28 kPa) above the recom-
mended 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 approx -
imately 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. NOTE:
• The TPMS is not intended to replace normal tire care and
maintenance or to provide warning of a tire failure or
condition.
• The TPMS should not be used as a tire pressure gauge while adjusting your tire pressure.
• Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may
affect the vehicle’s handling and stopping ability.
CAUTION!
• The TPMS has been optimized for the original equip -
ment 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. After -
market wheels can cause sensor damage.
• Using aftermarket tire sealants may cause the Tire Pres -
sure Monitoring System (TPMS) sensor to become
inoperable. After using an aftermarket tire sealant it is
recommended that you take your vehicle to an autho -
rized dealership to have your sensor function checked.
• After inspecting or adjusting the tire pressure always reinstall the valve stem cap. This will prevent moisture
and dirt from entering the valve stem, which could
damage the TPMS sensor. CAUTION!
(Continued)
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SAFETY 229
• The TPMS is not a substitute for proper tire maintenance,and it is the driver’s responsibility to maintain correct tire
pressure using an accurate tire pressure gauge, even if
under-inflation has not reached the level to trigger illumi -
nation of the TPMS Warning Light.
• Seasonal temperature changes will affect tire pressure, and the TPMS will monitor the actual tire pressure in the tire.
Tire Pressure Monitor Display The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each wheel
as part of the valve stem, transmit tire pressure readings to
the receiver module.
NOTE:
It is particularly important for you to check the tire pressure
in all of the tires on your vehicle monthly and to maintain the
proper pressure.
The TPMS consists of the following components:
• Receiver module
• Four tire pressure monitoring sensors
• Various tire pressure monitoring system messages, which
display in the instrument cluster
• Tire Pressure Monitoring System Warning Light
4
2020_DT_1500_OM_US.book Page 229

230 SAFETY
Tire Pressure Monitoring Low Pressure WarningsThe “Tire Pressure Monitoring System (TPMS)
Warning Light” will illuminate in the instrument
cluster and a chime will sound when tire pressure is
low in one or more of the four active road tires. In addition,
the instrument cluster will display a graphic showing the
pressure values of each tire with the low tire pressure values
in a different color. An "Inflate to XX" message will also be
displayed.
Low Tire Pressure Display Should this occur, you should stop as soon as possible and
inflate the tires with a low pressure condition (those in a
different color in the instrument cluster graphic) to the
vehicle’s recommended cold placard pressure inflation value
as shown in the "Inflate to XX" message. Once the system
receives the updated tire pressures, the system will automat
-
ically update, the graphic display in the instrument cluster
will return to it’s original color, and the “Tire Pressure Moni -
toring System Warning Light” will turn off. 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 recom -
mended cold placard pressure in order to turn the Tire Pres -
sure Monitoring System Warning Light off.
Service TPMS Warning

If a system fault is detected, the “Tire Pressure Monitoring System
(TPMS) Warning Light” will flash on and off for 75 seconds and
then remain on solid. The system fault will also sound a chime. In
addition, the instrument cluster will display a "SERVICE TPM
SYSTEM" message for a minimum of five seconds and then
display dashes (--) in place of the pressure value to indicate which
sensor is not being received.

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SAFETY 233
The hazard lamps will come on to confirm the vehicle is in
Tire Fill Alert mode.
When Tire Fill Alert Mode is entered, the tire pressure
display screen will be displayed in the instrument cluster.
If the hazard lamps do not come on while inflating the tire,
the TPM sensor may be in a null spot preventing the TPM
sensor signal from being received. In this case, the vehicle
may need to be moved either forward or backward slightly
to exit the null spot.
Operation:
• The horn will chirp to let the user know when to stopfilling the tire, when it reaches recommended pressure.
• The horn will chirp three times if the tire is over filled and will continue to chirp every five seconds if the user
continues to inflate the tire. • The horn will chirp once again when enough air is let out
to reach proper inflation level.
• The horn will also chirp three times if the tire is then under-inflated and will continue to chirp every five
seconds if the user continues to deflate the tire.
General Information
The following regulatory statement applies to all Radio
Frequency (RF) devices equipped in this vehicle:
This device complies with Part 15 of the FCC Rules and with
Innovation, Science and Economic Development Canada
license-exempt RSS standard(s). Operation is subject to the
following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired opera -
tion.
4
2020_DT_1500_OM_US.book Page 233

Periodic Safety Checks You Should Make Outside
The Vehicle
Tires
Examine tires for excessive tread wear and uneven wear
patterns. Check for stones, nails, glass, or other objects
lodged in the tread or sidewall. Inspect the tread for cuts and
cracks. Inspect sidewalls for cuts, cracks, and bulges. Check
the wheel bolts for tightness. Check the tires (including
spare) for proper cold inflation pressure.
Lights
Have someone observe the operation of brake lights and
exterior lights while you work the controls. Check turn
signal and high beam indicator lights on the instrument
panel.Door Latches
Check for proper closing, latching, and locking.
Fluid Leaks
Check area under the vehicle after overnight parking for
fuel, coolant, oil, or other fluid leaks. Also, if gasoline fumes
are detected or if fuel, or brake fluid leaks are suspected, the
cause should be located and corrected immediately.
4
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SAFETY 289