2020 Ram 1500 light

214 SAFETY
Overtaking Traffic
If you pass another vehicle slowly with a relative speed less
than 15 mph (24 km/h) and the vehicle remains in the blind
spot for approximately 1.5 seconds, the warning light will be
illuminated. If the difference in speed between the two vehi-
cles is greater than 15 mph (24 km/h), the warning light will
not illuminate.
Overtaking/Approaching Overtaking/Passing
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SAFETY 217
When RCP is on and the vehicle is in REVERSE (R), the
driver is alerted using both the visual and audible alarms,
including reducing the radio volume.
Modes Of Operation
Three selectable modes of operation are available in the
Uconnect System.
Refer to “Uconnect Settings” in “Multimedia” for further
information.
Blind Spot Alert Lights Only
When operating in Blind Spot Alert mode, the BSM system
will provide a visual alert in the appropriate side viewmirror based on a detected object. However, when the
system is operating in Rear Cross Path (RCP) mode, the
system will respond with both visual and audible alerts
when a detected object is present. Whenever an audible alert
is requested, the radio is muted.
Blind Spot Alert Lights/Chime
When operating in Blind Spot Alert Lights/Chime mode, the
BSM system will provide a visual alert in the appropriate
side view mirror based on a detected object. If the turn signal
is then activated, and it corresponds to an alert present on
that side of the vehicle, an audible chime will also be
sounded. Whenever a turn signal and detected object are
present on the same side at the same time, both the visual
and audible alerts will be issued. In addition to the audible
alert the radio (if on) will also be muted.
NOTE:
Whenever an audible alert is requested by the BSM system,
the radio is also muted.
When the system is in RCP, the system shall respond with
both visual and audible alerts when a detected object is
present. Whenever an audible alert is requested, the radio is
also muted. Turn/hazard signal status is ignored; the RCP
state always requests the chime.
WARNING!
Rear Cross Path Detection (RCP) is not a back up aid
system. It is intended to be used to help a driver detect
an oncoming vehicle in a parking lot situation. Drivers
must be careful when backing up, even when using RCP.
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. Failure to do so can result in serious
injury or death.
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220 SAFETY
Trailer Length Detection
Trailer length will be identified and placed into one of the
following categories:
• Trailer length up to 10 ft (3 m) — Blind spot zone will be adjusted to 10 ft (3 m) .
• Trailer length between 10 ft to 20 ft (3 m to 6 m) — Blind spot zone will be adjusted to 20 ft (6 m) . • Trailer length between 20 ft to 30 ft (6 m to 9 m) — Blind
spot zone will be adjusted to 30 ft (9 m) .
• Trailer length between 30 ft and 39.5 ft (9 m to 12 m) — Blind spot zone will be adjusted to MAX distance .
NOTE:
Trailer length is determined within +/- 3 ft (1 m) of actual
length. Trailers that are the same size as the category limit,
10/20/30 ft (3/6/9 m), could be subject to being placed in
the category above or below the correct one.
Trailer Merge Warning
Trailer Merge Warning is the extension of the blind spot
function to cover the length of the trailer, plus a safety
margin, to warn the driver when there is a vehicle in the adja -
cent lane. The driver is alerted by the illumination of the BSM
warning light located in the outside mirror on the side the
other vehicle is detected. In addition, an audible (chime) alert
will be heard and radio volume reduced. Refer to “Modes Of
Operation” in this section for further information.
1 — Trailer Length
2 — Trailer Width
3 — Trailer Hitch
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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.
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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
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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 231
If the ignition switch is cycled, this sequence will repeat,
providing the system fault still exists. If the system fault no
longer exists, the “Tire Pressure Monitoring System Warning
Light” will no longer flash, and the "SERVICE TPM
SYSTEM" message will no longer display, and a pressure
value will display in place of the dashes. A system fault can
occur due to any of the following:
• Signal interference due to electronic devices or drivingnext to facilities emitting the same radio frequencies as the
Tire Pressure Monitor (TPM) sensors
• Installing aftermarket window tinting that contains mate -
rials that may block radio wave signals
• Accumulation of snow or ice around the wheels or wheel housings
• Using tire chains on the vehicle
• Using wheels/tires not equipped with TPM sensors

A system fault may occur due to an incorrect TPM sensor loca -
tion condition. When a system fault occurs due to an incorrect
TPM sensor location, 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 “Tire
Pressure Temporarily Unavailable” message in place of the
tire pressure display screen. If the ignition switch is cycled, this sequence will repeat, providing the system fault still
exists. If the system fault no longer exists, the “Tire Pressure
Monitoring System Warning Light” will no longer flash and
the tire pressure display screen will be displayed showing the
tire pressure values the correct locations.

Vehicles With Non Matching Full Size Spare Or Compact
Spare
• The non matching full size spare or compact spare tire
does not have a TPM sensor. Therefore, the TPMS will not
monitor the pressure in the non matching full size spare or
compact spare tire.
• If you install the non matching full size spare or compact spare tire in place of a road tire that has a pressure below
the low-pressure warning limit, upon the next ignition
switch cycle, the Tire Pressure Monitoring System (TPMS)
Warning Light and a “LOW TIRE” message will remain
ON and a chime will sound. In addition, the graphic in the
instrument cluster will still display a pressure value in a
different color and an “Inflate to XX” message.
• After driving the vehicle for up to 20 minutes above 15 mph (24 km/h), the Tire Pressure Monitoring System
(TPMS) Warning Light will flash on and off for 75 seconds
and then remain on solid. In addition, the instrument
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