Get SAFETY -> Auxiliary Driving Systems Guide for Ram Pickup 1500 Light Truck 2023

SAFETY 267

Enabling SSC

SSC Target Set Speeds

Rain Brake Support (RBS)

SSC is enabled by pushing the SSC switch, but the

following conditions must also be met to enable SSC:

 1st = 0.6 mph (1 km/h)

 2nd = 1.2 mph (2 km/h)

 3rd = 1.8 mph (3 km/h)

 4th = 2.5 mph (4 km/h)

 5th = 3.1 mph (5 km/h)

 6th = 3.7 mph (6 km/h)

 7th = 4.3 mph (7 km/h)

 8th = 5 mph (8 km/h)

RBS may improve braking performance in wet conditions.

It will periodically apply a small amount of brake pressure

to remove any water buildup on the front brake rotors.

It functions when the windshield wipers are in LO or HI

speed. When Rain Brake Support is active, there is no

notification to the driver and no driver interaction is

required.

 The driveline is in 4WD Low.

 The vehicle speed is below 5 mph (8 km/h).

 The parking brake is released.

 The driver door is closed.

 The driver is not applying throttle.

Activating SSC

Ready Alert Braking (RAB)

RAB may reduce the time required to reach full braking

during emergency braking situations. It anticipates when

an emergency braking situation may occur by monitoring

how fast the throttle is released by the driver. The

Electronic Brake Control system will prepare the brake

system for a panic stop.

Once SSC is enabled it will activate automatically once the

following conditions are met:

 9th = 5.6 mph (9 km/h) — if equipped

 REVERSE = 0.6 mph (1 km/h)

 NEUTRAL = 1.2 mph (2 km/h)

 PARK = SSC remains enabled but not active

NOTE:

 The driver releases the throttle.

 The driver releases the brake.

 The transmission is in any selection other than PARK.

 Your vehicle speed is below 20 mph (32 km/h).

Selec-Speed Control (SSC) — If Equipped

SSC is intended for off-road driving in 4WD Low only. SSC

maintains vehicle speed by actively controlling engine

torque and brakes.

6

 During SSC, the +/- gear selector input is used for SSC

target speed selection but will not affect the gear

chosen by the transmission. While actively controlling

SSC, the transmission will shift appropriately for the

driver-selected set speed and corresponding driving

conditions.

The set speed for SSC is selectable by the driver, and can

be adjusted by using the gear shift +/-. Additionally, the

SSC set speed maybe reduced when climbing a grade and

the level of set speed reduction depends on the

magnitude of grade. The following summarizes the SSC

set speeds:

SSC has three states:

1. Off (feature is not enabled and will not activate)

2. Enabled (feature is enabled and ready but activation

conditions are not met, or driver is actively overriding

with brake or throttle application)

 SSC operation is influenced by Off Road+ drive mode if

active. The differences may be notable to the driver as

a varying level of aggressiveness.

3. Active (feature is enabled and actively controlling

vehicle speed)

268 SAFETY

Driver Override

Feedback To The Driver

A feature of the TCS, Brake Limited Differential (BLD)

functions similarly toa 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

Electronic Stability Control (ESC) are in reduced modes.

The driver may override SSC activation with throttle or

brake application at any time.

The instrument cluster has an SSC icon and the SSC

switch has a lamp which offers feedback to the driver

about the state SSC is in.

Deactivating SSC

 The cluster icon and switch lamp will illuminate and

remain on solid when SSC is enabled or activated.

These are the normal operating conditions for SSC.

SSC will be deactivated but remain available if any of the

following conditions occur:

 The driver overrides SSC set speed with throttle or

brake application.

 The cluster icon and switch lamp will flash for several

seconds then extinguish when the driver pushes the

SSC switch but enabled conditions are not met.

Trailer Sway Control (TSC)

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 vehicle speed exceeds 20 mph (32 km/h) but

remains below 40 mph (64 km/h).

 The cluster icon and switch lamp will flash for several

seconds then extinguish when SSC disables due to

excess speed.

 The vehicle is shifted into PARK.

NOTE:

Disabling SSC

TSC cannot stop all trailers from swaying. Always use

caution when towing a trailer and follow the trailer tongue

weight recommendations Ú page 173.

 The cluster icon and switch lamp will flash then extin-

guish when SSC deactivates due to overheated brakes.

SSC will deactivate and be disabled if any of the following

conditions occur:

 The driver pushes the SSC switch.

 The driveline is shifted out of the 4WD Low.

 The parking brake is applied.

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!

SSC is only intended to assist the driver in controlling

vehicle speed when driving in off road conditions. The

driver must remain attentive to the driving conditions

and is responsible for maintaining a safe vehicle speed.

 The driver door opens.

 The vehicle is driven greater than 20 mph (32 km/h)

for greater than 70 seconds.

WARNING!

 The vehicle is driven greater than 40 mph (64 km/h).

SSC will exist immediately.

Traction Control System (TCS)

If TSC activates while driving, slow the vehicle down,

stop at the nearest safe location, and adjust the trailer

load to eliminate trailer sway.

The TCS monitors the amount of wheel spin of each of the

driven wheels. If wheel spin is detected, theTCS may apply

brake pressure to the spinning wheel(s) and/or reduce

engine power to provide enhanced acceleration and

stability.

SAFETY 269

The BSM detection zone covers approximately one lane

width on both sides of the vehicle 12 ft (3.8 m). The zone

length starts at the outside rearview mirror and extends

approximately 10 ft (3 m) beyond the rear fascia/bumper

of the vehicle. The BSM system monitors the detection

zones on both sides of the vehicle when the vehicle speed

reaches approximately6 mph (10 km/h) or higher and will

alert the driver of vehicles in these areas.

AUXILIARY DRIVING SYSTEMS

BLIND SPOT MONITORING (BSM) —

IF EQUIPPED

BSM uses two radar sensors, located inside the taillights,

to detect highway licensable vehicles (automobiles,

trucks, motorcycles, etc.) that enter the blind spot zones

from the rear/front/side of the vehicle.

NOTE:

 The BSM system DOES NOT alert the driver about

rapidly approaching vehicles that are outside the

detection zones.

Radar Sensor Locations

If the system detects degraded performance due to

contamination or foreign objects, a message will warn you

of a blocked sensor and the warning indicators in side

view mirrors will be on. The warning indicators will remain

illuminated until blockage clearing conditions are met.

First clear the taillights around the sensors of the

blockage. After removing the blockage, the following

procedure can be used to reset the system:

 BSM may experience dropouts (blinking on and off) of

the side mirror warning indicator lights when a motor-

cycle or any small object remains at the side of the

vehicle for extended periods of time (more than a

couple of seconds).

6

The BSM system can become blocked if snow, ice, mud, or

other road contaminations accumulate on the rear fascia/

bumper where the radar sensors are located. The system

may also detect blockage if the vehicle is operated in

areas with extremely low radar returns such as a desert or

parallel to a large elevation drop. If blockage is detected,

a “Blind Spot Temporarily Unavailable, Wipe Rear

Corners” message will display in the cluster, both mirror

lights will illuminate, and BSM and RCP alerts will not

occur. This is normal operation. The system will

automatically recover and resume function when the

condition clears. To minimize system blockage, do not

block the area of the rear fascia/bumper where the radar

sensors are located with foreign objects (bumper stickers,

bicycle racks, etc.) and keep it clear of road

Cycle the ignition from ON to OFF and then back ON.

Rear Detection Zones

If the blockage message is still present after cycling the

ignition and driving in traffic, check again for a blockage.

When the vehicle is started, the BSM Warning Light will

momentarily illuminate in both outside rearview mirrors to

let the driver know that the system is operational. The

BSM system sensors operate when the vehicle is in any

forward gear and enters standbymode when the vehicle is

in PARK.

The system may also detect a blockage if the vehicle is

operated in areas with extremely low radar returns such as

a desert or parallel to a large elevation drop.

contaminations.

270 SAFETY

The BSM system notifies the driver of objects in the

detection zones by illuminating the BSM Warning Light

located in the outside mirrors, in addition to sounding an

audible (chime) alert and reducing the radio volume

Ú page 272.

Entering From The Side

Overtaking Traffic

Vehicles that move into your adjacent lanes from either

side of the vehicle.

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 vehicles is greater than 15 mph (24 km/h), the

warning light will not illuminate.

Side Monitoring

Entering From The Rear

Warning Light Location

Vehicles that come up from behind your vehicle on either

side and enter the rear detection zone with a relative

speed of less than 30 mph (48 km/h).

The BSM system monitors the detection zone from three

different entry points (side, rear, front) while driving to see

if an alert is necessary. The BSM system will issue an alert

during these types of zone entries.

Overtaking/Approaching

Rear Monitoring

SAFETY 271

Rear Cross Path (RCP)

RCP is intended to aid the driver when backing out of

parking spaces where their vision of oncoming vehicles

may be blocked. Proceed slowly and cautiously out of the

parking space until the rear end of the vehicle is exposed.

The RCP system will then have a clear view of the cross

traffic, and if an oncoming vehicle is detected, alert the

driver.

Overtaking/Passing

Opposing Traffic

The BSM system is designed not to issue an alert on

stationary objects such as guardrails, posts, walls, foliage,

berms, snow banks, car washes, etc. However,

occasionally the system may alert on such objects. This is

normal operation and your vehicle does not require

service.

For information on how Blind Spot Monitoring functions

when pulling a trailer Ú page 272.

WARNING!

6

The Blind Spot Monitoring system is only an aid to help

detect objects in the blind spot zones. The BSM system

is not designed to detect pedestrians, bicyclists, or

animals. Even if your vehicle is equipped with the BSM

system, always check your vehicle’s mirrors, glance

over your shoulder, and use your turn signal before

changing lanes. Failure to do so can result in serious

injury or death.

The BSM system will not alert you of objects that are

traveling in the opposite direction of the vehicle in

adjacent lanes Ú page 402.

RCP Detection Zones

RCP monitors the rear detection zones on both sides of

the vehicle, for objects that are moving toward the side of

the vehicle with a minimum speed of approximately 3 mph

(5 km/h), to objects moving a maximum of approximately

20 mph (32 km/h), such as in parking lot situations.

272 SAFETY

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.

Blind Spot Alert Lights/Chime

Trailer Merge Assist — If Equipped

Trailer Merge Assist is a function of the Blind Spot

Monitoring (BSM) system that extends the blind spot zone

to work while pulling a trailer.

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:

In a parking lot situation, oncoming vehicles can be

blocked by vehicles parked on either side. If the sensors

are blocked by other structures or vehicles, the system will

not be able to alert the driver.

NOTE:

When Trailer Merge Assist is activated, Rear Cross Path is

disabled.

Trailer Merge Assist consists of three sub functions:

 Automatic Trailer Detection

WARNING!

Rear Cross Path Detection (RCP) is not a backup 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.

 Trailer Length Detection

NOTE:

 Trailer Merge Warning

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.

Blind Spot Alert Off

Blind Spot Modes

Blind Spot has three selectable modes of operation that

are available in the Uconnect system.

When the BSM system is turned off there will be no visual

or audible alerts from either the BSM, RCP, or Trailer

Merge Assist systems.

NOTE:

Blind Spot Alert Lights Only

Blind Spot Zones With Trailer Merge Assist

The BSM system will store the current operating mode

when the vehicle is shut off. Each time the vehicle is

started the previously stored mode will be recalled and

used.

When operating in Blind Spot Alert mode, the BSM system

will provide a visual alert in the appropriate side view

mirror 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.

1 — Vehicle

2 — Trailer

SAFETY 273

Automatic Trailer Detection

NOTE:

During the same ignition cycle, if the vehicle is at a

standstill for a minimum of 90 seconds, a new “trailer

detection request” is enabled by the system once the

vehicle resumes motion.

There are two modes of operation for the detection of the

trailer length:

 Automatic Mode — When “Auto Mode” is selected, the

system will use the blind spot sensors to automatically

determine the presence and length of a trailer. The

presence of a trailer will be detected using the blind

spot radar within 90 seconds of forward movement of

the vehicle. The vehicle must be moving above 6 mph

(10 km/h) to activate the feature. Once the trailer has

been detected, the system will default to the maximum

blind spot zone until the length has been verified. You

The maximum trailer length supported by the Trailer

Merge Assist feature is 39.5 ft (12 m). Trailer length is

considered the forward most portion of the trailer hitch to

the rearward most portion of the body, fascia/bumper, or

ramp of the trailer.

The maximum width supported by the Trailer Merge Assist

feature is 8.5 ft (2.59 m). Trailer width is measured at the

widest portion of the trailer and may include wheels, tires,

finders, or rails.

Trailer Length Detection

1 — Trailer Length

will see “Auto” in the instrument panel cluster

.

 Maximum Mode — When “Max Mode” is selected, the

2 — Trailer Hitch

3 — Trailer Width

system will default to the maximum blind spot zone

NOTE:

regardless of what size trailer is attached

.

Fifth wheel or gooseneck trailers are not supported by

Trailer Merge Assist.

6

NOTE:

Trailer length will be identified and placed into one of the

following categories:

Selected setting is stored when the ignition is placed in the

OFF position. To change this setting, it must be selected

through the Uconnect Settings Ú page 191.

NOTE:

The ability to detect a trailer may be degraded in crowded

or busy environments. Busy parking lots, narrow areas

surrounded with trees, or any other crowded area may

prevent the radar sensors from being able to adequately

detect the trailer. The system will try to detect a trailer at

every ignition cycle or 90 seconds of standstill.

 Trailer length up to 10 ft (3 m) — Blind spot zone will be

adjusted to 10 ft (3 m)

.

Trailer Length Detection

 Trailer length between 10 ft to 20 ft

(3 m to 6 m) — Blind spot zone will be adjusted to

Once the trailer presence has been established, the trailer

length will be established (by making a 90 degree turn)

and then the trailer length category (example 10-20 ft

(3 m to 6 m)) will be displayed. This can take up to

30 seconds after completing the turn.

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

.

274 SAFETY

If the driver does not take action based upon these

progressive 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 warnings 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.

NOTE:

WARNING!

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.

The Blind Spot Monitoring system is only an aid to help

detect objects in the blind spot zones. The BSM system

is not designed to detect pedestrians, bicyclists, or

animals. Even if your vehicle is equipped with the BSM

system, always check your vehicle’s mirrors, glance

over your shoulder, and use your turn signal before

changing lanes. Failure to do so can result in serious

injury or death.

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

adjacent 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 on. In addition, an

audible (chime) alert will be heard and radio volume will

be reduced Ú page 272.

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.

FORWARD COLLISION WARNING (FCW)

WITH MITIGATION — IF EQUIPPED

FCW with Mitigation 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 potential 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:

 The Trailer Merge Alert system DOES NOT alert the

driver about rapidly approaching vehicles that are

outside the detection zones.

 The Blind Spot Monitoring (BSM) system may experi-

ence drop outs (blinking on and off) of the side mirror

warning indicator lights when a motorcycleor any small

object remains at the side of the vehicle for extended

periods of time (more than a couple of seconds).

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 aforward collision is probable, the

driver will be provided with audible and visual warnings as

well as a possible brake jerk warning.

 Crowded areas such as parking lots, neighborhoods,

etc. may lead to an increased amount of false alerts.

This is normal operation.

FCW Message

SAFETY 275

When the system determines a collision with the vehicle in

front of you is no longer probable, the warning message

will be deactivated Ú page 402.

 When FCW status is set to “Only Warning”, this

WARNING!

prevents the system from providing limited active

braking, or additional brake support if the driver is not

braking adequately in the event of a potential frontal

collision.

Forward Collision Warning (FCW) is not intended to

avoid a collision on its own, nor can FCW detect every

type of potential collision. The driver has the

responsibility to avoid a collision by controlling the

vehicle via braking and steering. Failure to follow this

warning could lead to serious injury or death.

NOTE:

 The minimum speed for FCW activation is 3 mph

(5 km/h).

 When FCW status is set to “Warning and Braking”, this

allows the system to warn the driver of a possible colli-

sion with the vehicle in front using audible/visual warn-

ings and it applies autonomous braking.

 The FCW alerts may be triggered on objects other than

vehicles such as guardrails or sign posts based on the

course prediction. This is expected and is a part of

normal FCW activation and functionality.

 The FCW system state is defaulted to “Full On” from

oneignition cycle to the next. If the system is turned off,

it will reset to “Full On” when the vehicle is restarted.

Turning FCW On Or Off

The FCW button is located in the Uconnect display in the

control settings Ú page 191.

 It is unsafe to test the FCW system. To prevent such

misuse of the system, after four Active Braking events

within a keycycle, the ActiveBraking portion of FCW will

be deactivated until the next key cycle.

FCW Braking Status And Sensitivity

The FCW Sensitivity and Active Braking status are

programmable through the Uconnect system

Ú page 191.

 To turn the FCW system on, press the forward collision

button once.

 The FCW system is intended for on-road use only. If the

vehicle is taken off-road, the FCW system should be

deactivated to prevent unnecessary warnings to the

surroundings.

 To turn the FCW system off, press the forward collision

button once.

6

 Far

NOTE:

 When the sensitivity of FCW is set to the “Far”

setting and the system status is “Only Warning”,

this allows the system to warn the driver of a

possible more distant collision with the vehicle in

front using audible/visual warnings.

 When the FCW is “on”, this allows the system to warn

the driver of a possible collision with the vehicle in

front.

 FCW may not react to irrelevant objects such as over-

head objects, ground reflections, objects not in the

path of the vehicle, stationary objects that are far away,

oncoming traffic, or leading vehicles with the same or

higher rate of speed.

 When the FCW is “off”, this prevents the system from

warning the driver of a possible collision with the

vehicle in front. If the FCW is set to “off”, “FCW OFF” will

be displayed in the instrument cluster display.

 More cautious drivers that do not mind frequent

warnings may prefer this setting.

 FCW will be disabled like ACC, with the unavailable

screens.

NOTE:

The “Far” setting may result in a greater number of FCW

possible collision warnings experienced.

276 SAFETY

 Medium

Service FCW Warning

If the system turns off, and the instrument cluster

displays:

WARNING!

 When the sensitivity of FCW is set to the“Medium”

Pedestrian Emergency Braking (PEB) is not intended to

avoid a collision on its own, nor can PEB detect every

type of potential collision with a pedestrian. The driver

has the responsibility to avoid a collision by controlling

the vehicle via braking and steering. Failure to follow

this warning could lead to serious injury or death.

setting and the system status is “Only Warning”,

this allows the system to warn the driver of a

possible collision with the vehicle in front using

audible/visual warnings.

 ACC/FCW Unavailable Service Required

 Cruise/FCW Unavailable Service Required

This indicates there is an internal system fault. Although

the vehicle is still drivable under normal conditions, have

the system checked by an authorized dealer.

 Near

 When the sensitivity of FCW is set to the “Near”

setting and the system status is “Only Warning”,

this allows the system to warn the driver of a

possible closer collision with the vehicle in front

using audible/visual warnings.

Turning PEB On Or Off

Pedestrian Emergency Braking (PEB) —

If Equipped

PEB is a subsystem of the FCW system that provides the

driver with audible and visual warnings in the instrument

cluster display, and may apply automatic braking when it

detects a potential frontal collision with a pedestrian/

cyclist.

NOTE:

The default status of PEB is “On.” This allows the system

to warn you of a possible frontal collision with the

pedestrian.

 This setting provides less reaction time than the

“Far” and “Medium” settings, which allows for a

more dynamic driving experience.

The PEB button is located in the Uconnect display in the

controls settings Ú page 191.

 More dynamic or aggressive drivers that want to

avoid frequent warnings may prefer this setting.

To turn the PEB system off, push the Pedestrian

Emergency Braking button once.

If a PEB eventbegins at a speed below 37 mph (60 km/h),

the system may provide braking to mitigate the potential

collision with a pedestrian/cyclist. If the PEB event stops

the vehicle completely, the system will hold the vehicle at

a standstill for two seconds and then release the brakes.

When the system determines a collision with the

NOTE:

The “Near” setting may result in a lesser number of FCW

possible collision warnings experienced.

To turn the PEB system back on, push the Pedestrian

Emergency Braking button again.

Changing the PEB status to “Off” deactivates the system,

so no warning or active braking will be available in case of

a possible frontal collision with the pedestrian.

FCW Limited Warning

If the instrument cluster displays “ACC/FCW Limited

Functionality” or “ACC/FCW Limited Functionality Clean

Front Windshield” momentarily, there may be a condition

that limits FCW functionality. Although the vehicle is still

driveable under normal conditions, the active braking may

not be fully available. Once the condition that limited the

system performance is no longer present, the system will

return toits full performance state. If the problem persists,

see an authorized dealer.

pedestrian/cyclist in front of you is no longer probable, the

warning message will be deactivated.

NOTE:

The minimum speed for PEB activation is 3 mph (5 km/h).

The PEB system will retain the last setting selected by the

driver after ignition shut down.

SAFETY 277

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 Ú page 402.

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.

TIRE PRESSURE MONITORING SYSTEM

(TPMS)

TPMS will warn the driver of a low tire pressure based on

the vehicle recommended cold placard pressure.

The TPMS will continue to warn the driver of low tire

pressure 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

illuminates, 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 Lightwill 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.

NOTE:

CAUTION!

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

pressure 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 pressure to the recommended cold

placard pressure in order for the TPMS Warning Light to

turn off.

 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. Undesirablesystem operation or sensor

damage may result when using replacement equip-

ment 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 an authorized dealership to have your sensor func-

tion checked.

NOTE:

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 tireinflation pressure must not

exceed the maximum inflation pressure molded into the

tire sidewall. The tire pressure will also increase as the

vehicle is driven — this is normal and there should be no

adjustment for this increased pressure.

6

When filling warm tires, the tire pressure may need to be

increased up to an additional 4 psi (28 kPa) above the

recommended cold placard pressure in order to turn the

TPMS Warning Light off.

 After inspecting or adjusting the tire pressure always

reinstall the valve stem cap. This will prevent mois-

ture and dirt from entering the valve stem, which

could damage the TPMS sensor.

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 approximately 23 psi

(158 kPa). This tire pressure is sufficiently low enough

to turn on the TPMS Warning Light.

See Ú page 370 on how to properly inflate the vehicle’s

tires.

278 SAFETY

NOTE:

TheTire Pressure Monitoring 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.

 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, unless your vehicle

is equipped with a Tire Fill Alert (TFA) system.

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.

 Driving on a significantly underinflated tire causes the

tire to overheat and can lead to tire failure. Underinfla-

tion also reduces fuel efficiency and tire tread life, and

may affect the vehicle’s handling and stopping ability.

The TPMS consists of the following components:

 Receiver module

Low Tire Pressure Display

 The TPMS is not a substitute for proper tire mainte-

nance, and it is the driver’s responsibility to maintain

correct tire pressure using an accurate tire pressure

gauge, even if underinflation has not reached the level

to trigger illumination of the TPMS Warning Light.

 Four Tire Pressure Monitoring System sensors

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 automatically update, the

graphic display in the instrument cluster will return to its

original color, and the Tire Pressure Monitoring 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.

 Various Tire Pressure Monitoring System messages,

which display in the instrument cluster

 Tire Pressure Monitoring System Warning Light

Tire Pressure Monitoring System Low

Pressure Warnings

 Seasonal temperature changes will affect tire pres-

sure, and the TPMS will monitor the actual tire pres-

sure in the tire.

The 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.

NOTE:

When filling warm tires, the tire pressure may need to be

increased up to an additional 4 psi (28 kPa) above the

recommended cold placard pressure in order to turn the

Tire Pressure Monitoring System Warning Light off.

Tire Pressure Monitoring System Display

SAFETY 279

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.

 For each subsequent ignition switch cycle, a chime will

sound, the Tire Pressure Monitoring System (TPMS)

Warning Light will flash on and off for 75 seconds and

then remain on solid, and 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.

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.

 Once you repair or replace the original road tire and

reinstall it on the vehicle in place of the non-matching

full size spare or compact spare, the TPMS will update

automatically. In addition, the Tire Pressure Monitoring

System (TPMS) Warning Light will turn off and the

graphic in the instrument cluster will display a new

pressure value instead of dashes (--), as long as no tire

pressure is below the low-pressure warning limit in any

of the four active road tires. 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.

Vehicles With Non-Matching Full Size Spare Or Compact

Spare

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

valuewill display in place of the dashes. A system fault can

occur due to any of the following:

 The non-matching full size spare or compact spare tire

does not have a TPMS 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.

 Signal interference due to electronic devices or driving

next to facilities emitting the same radio frequencies

as the Tire Pressure Monitoring System sensors

6

Tire Fill Alert

This feature notifies the user when the placard tire

pressure is attained while inflating or deflating the tire.

 Installing aftermarket window tinting that contains

materials that may block radio wave signals

You may choose to disable or enable the Tire Fill Alert

feature through use of the Uconnect Settings in the radio.

 Accumulation of snow or ice around the wheels or

wheel housings

NOTE:

 Using tire chains on the vehicle

 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 cluster will display a "SERVICE TPM

 Only one tire can be filled at a time when using the Tire

Fill Alert system.

 Using wheels/tires not equipped with TPMS sensors

A system fault may occur due to an incorrect TPMS sensor

location condition. When a system fault occurs due to an

incorrect TPMS sensor location, the Tire Pressure

Monitoring System (TPMS) Warning Light will flash on and

off for 75 seconds and then remain on solid.

 The Tire Fill Alert feature cannot be entered if an

existing TPMS fault is set to “active” or if the system is

in deactivation mode (if equipped).

SYSTEM" message for a minimum of five seconds and

then display dashes (--) in place of the pressure value.

SAFETY -> Auxiliary Driving Systems for Your Ram Pickup 1500 Light Truck 2023

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