Jeep Grand Cherokee (2022 year). Manual in english

252

SAFETY

Electronic Brake Force Distribution (EBD)

EBD manages the distribution of the braking

torque between the front and rear axles by limiting

braking pressure to the rear axle. This is done to

prevent overslip of the rear wheels to avoid vehicle

instability, and to prevent the rear axle from

entering ABS before the front axle.

Electronic Roll Mitigation (ERM)

ERM anticipates the potential for wheel lift by

monitoring the driver’s steering wheel input and

the speed of the vehicle. When ERM determines

that the rate of change of the steering wheel angle

and vehicle’s speed are sufficient to potentially

cause wheel lift, it then applies the appropriate

brake and may also reduce engine power to lessen

the chance that wheel lift will occur. ERM can only

reduce the chance of wheel lift occurring during

severe or evasive driving maneuvers; it cannot

prevent wheel lift due to other factors, such as

road conditions, leaving the roadway, or striking

objects or other vehicles.
NOTE:

ERM is disabled any time the ESC is in “Full Off”

mode (if equipped). See

page 252 for a

complete explanation of the available ESC modes.

Electronic Stability Control (ESC)

ESC enhances directional control and stability of

the vehicle under various driving conditions. ESC

corrects for oversteering or understeering of the

vehicle by applying the brake of the appropriate

wheel(s) to assist in counteracting the above

conditions. Engine power may also be reduced to

help the vehicle maintain the desired path.



Oversteer — when the vehicle is turning more

than appropriate for the steering wheel position.



Understeer — when the vehicle is turning less

than appropriate for the steering wheel position.

ESC uses sensors in the vehicle to determine the

vehicle path intended by the driver and compares

it to the actual path of the vehicle. When the actual

path does not match the intended path, ESC

applies the brake of the appropriate wheel to

assist in counteracting the oversteer or understeer

condition.
The ESC Activation/Malfunction Indicator Light

located in the instrument cluster will start to flash

as soon as the ESC system becomes active. The

ESC Activation/Malfunction Indicator Light also

flashes when the Traction Control System (TCS) is

active. If the ESC Activation/Malfunction Indicator

Light begins to flash during acceleration, ease up

on the accelerator and apply as little throttle as

possible. Be sure to adapt your speed and driving

to the prevailing road conditions.

WARNING!

Many factors, such as vehicle loading, road

conditions and driving conditions, influence the

chance that wheel lift or rollover may occur. ERM

cannot prevent all wheel lift or rollovers,

especially those that involve leaving the roadway

or striking objects or other vehicles. The

capabilities of an ERM-equipped vehicle must

never be exploited in a reckless or dangerous

manner which could jeopardize the user's safety

or the safety of others.

SAFETY

253

(Continued)

ESC Operating Modes

Depending upon model and mode of operation, the

ESC system may have multiple operating modes.
ESC On
This is the normal operating mode for the ESC.

Whenever the vehicle is started, the ESC system

will be in this mode. This mode should be used for

most driving conditions. Alternate ESC modes

should only be used for specific reasons as noted

in the following paragraphs.

Partial Off
This mode may be useful if the vehicle becomes

stuck. This mode may modify TCS and ESC

thresholds for activation, which allows for more

wheel spin than normally allowed.
To enter the “Partial Off” mode, momentarily push

the ESC OFF button and the ESC OFF Indicator

Light will illuminate. To turn the ESC on again,

momentarily push the ESC OFF button and the ESC

OFF Indicator Light will turn off.
NOTE:

For vehicles with multiple partial ESC modes, the

push and release of the button will toggle the ESC

modes. Multiple attempts may be required to

return to "ESC On" mode.

WARNING!



Electronic Stability Control (ESC) cannot

prevent the natural laws of physics from

acting on the vehicle, nor can it increase the

traction afforded by prevailing road condi

tions. ESC cannot prevent accidents, including

those resulting from excessive speed in turns,

driving on very slippery surfaces, or hydro

planing. ESC also cannot prevent accidents

resulting from loss of vehicle control due to

inappropriate driver input for the conditions.

Only a safe, attentive, and skillful driver can

prevent accidents. The capabilities of an ESC

equipped vehicle must never be exploited in a

reckless or dangerous manner which could

jeopardize the user’s safety or the safety of

others.



Vehicle modifications, or failure to properly

maintain your vehicle, may change the

handling characteristics of your vehicle, and

may negatively affect the performance of the

ESC system. Changes to the steering system,

suspension, braking system, tire type and size

or wheel size may adversely affect ESC perfor

mance. Improperly inflated and unevenly worn

tires may also degrade ESC performance. Any

vehicle modification or poor vehicle mainte

nance that reduces the effectiveness of the

ESC system can increase the risk of loss of

vehicle control, vehicle rollover, personal

injury and death.

WARNING!



When in “Partial Off” mode, the TCS function

ality of ESC (except for the limited slip feature

described in the TCS section) has been

disabled and the ESC OFF Indicator Light will

be illuminated. When in “Partial Off” mode,

the engine power reduction feature of TCS is

disabled, and the enhanced vehicle stability

offered by the ESC system is reduced.



Trailer Sway Control (TSC) is disabled when

the ESC system is in the “Partial Off” mode.

254

SAFETY

ESC Activation/Malfunction Indicator Light

And ESC OFF Indicator Light

The ESC Activation/Malfunction Indicator

Light in the instrument cluster will come

on when the ignition is placed in the ON/

RUN mode. It should go out with the

engine running. If the ESC Activation/Malfunction

Indicator Light comes on continuously with the

engine running, a malfunction has been detected

in the ESC system. If this light remains on after

several ignition cycles, and the vehicle has been

driven several miles (kilometers) at speeds greater

than 30 mph (48 km/h), see an authorized dealer

as soon as possible to have the problem

diagnosed and corrected.
The ESC Activation/Malfunction Indicator Light

starts to flash as soon as the tires lose traction and

the ESC system becomes active. The ESC

Activation/Malfunction Indicator Light also flashes

when TCS is active. If the ESC Activation/

Malfunction Indicator Light begins to flash during

acceleration, ease up on the accelerator and apply

as little throttle as possible. Be sure to adapt your

speed and driving to the prevailing road conditions.

The ESC OFF Indicator Light indicates the

customer has elected to have the

Electronic Stability Control (ESC) in a

reduced mode.

NOTE:



The ESC Activation/Malfunction Indicator Light

and the ESC OFF Indicator Light come on

momentarily each time the ignition is placed in

the ON/RUN mode.



Each time the ignition is placed in the ON/RUN

mode, the ESC system will be on even if it was

turned off previously.



The ESC system will make buzzing or clicking

sounds when it is active. This is normal; the

sounds will stop when ESC becomes inactive

following the maneuver that caused the ESC

activation.

Hill Descent Control (HDC) — If Equipped

HDC is intended for low speed off-road

driving while in 4WD Low. HDC maintains

vehicle speed while descending hills

during various driving situations. HDC

controls vehicle speed by actively controlling the

brakes.

HDC 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).

3. Active (feature is enabled and actively

controlling vehicle speed).

Enabling HDC
HDC is enabled by pushing the HDC switch, but the

following conditions must also be met to enable

HDC:



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.

Activating HDC
Once HDC is enabled it will activate automatically

if driven down a grade of sufficient magnitude. The

set speed for HDC is selectable by the driver, and

can be adjusted by using the gear shift +/-. The

following summarizes the HDC set speeds:

SAFETY

255

HDC Target Set Speeds



P = No set speed. HDC may be enabled but will

not activate.



R = 0.6 mph (1 km/h)



N = 1.2 mph (2 km/h)



D = 0.6 mph (1 km/h)



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 = 5.0 mph (8 km/h)

NOTE:

During HDC the +/- shifter input is used for HDC

target speed selection, but will not affect the gear

chosen by the transmission. When actively

controlling HDC the transmission will shift appro

priately for the driver-selected set speed and corre

sponding driving conditions.
Driver Override
The driver may override HDC activation with

throttle or brake application at any time.

Deactivating HDC
HDC will be deactivated but remain available if any

of the following conditions occur:



The driver overrides HDC set speed with throttle

or brake application.



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

but remains below 40 mph (64 km/h).



The vehicle is on a downhill grade of insufficient

magnitude, is on level ground, or is on an uphill

grade.



The vehicle is shifted to PARK.

Disabling HDC
HDC will be deactivated and disabled if any of the

following conditions occur:



The driver pushes the HDC switch.



The driveline is shifted out of 4WD Low.



The parking brake is applied.



The driver door opens.



The vehicle is driven greater than 20 mph

(32 km/h) for greater than 70 seconds.



The vehicle is driven greater than 40 mph

(64 km/h) (HDC exits immediately).



HDC detects excessive brake temperature.

Feedback To The Driver
The instrument cluster has an HDC icon and the

HDC switch has an LED icon, which offers feedback

to the driver about the state HDC is in.



The cluster icon and switch lamp will illuminate

and remain on solid when HDC is enabled or

activated. This is the normal operating condition

for HDC.



The cluster icon and switch lamp will flash for

several seconds, then extinguish when the

driver pushes the HDC switch but enable condi

tions are not met.



The cluster icon and switch lamp will flash for

several seconds, then extinguish when HDC

disables due to excess speed.



The cluster icon and switch lamp will flash when

HDC deactivates due to overheated brakes. The

flashing will stop and HDC will activate again

once the brakes have cooled sufficiently.

WARNING!

HDC is only intended to assist the driver in

controlling vehicle speed when descending hills.

The driver must remain attentive to the driving

conditions and is responsible for maintaining a

safe vehicle speed.

256

SAFETY

Hill Start Assist (HSA)

HSA is designed to mitigate roll back from a

complete stop while on an incline. If the driver

releases the brake while stopped on an incline,

HSA will continue to hold the brake pressure for a

short period. If the driver does not apply the

throttle before this time expires, the system will

release brake pressure and the vehicle will roll

down the hill as normal.
The following conditions must be met in order for

HSA to activate:



The feature must be enabled.



The vehicle must be stopped.



The parking brake must be off.



The driver door must be closed.



The vehicle must be on a sufficient grade.



The gear selection must match vehicle uphill

direction (i.e., vehicle facing uphill is in forward

gear; vehicle backing uphill is in REVERSE (R)

gear).



HSA will work in REVERSE gear and all forward

gears. The system will not activate if the trans

mission is in PARK (P) or NEUTRAL (N). For vehi

cles equipped with a manual transmission, if

the clutch is pressed, HSA will remain active.

Disabling And Enabling HSA

This feature can be turned on or turned off. To

change the current setting, proceed as follows:



If disabling HSA using your instrument cluster

display, see

page 99 for further information.



If disabling HSA using Uconnect Settings, see

page 204 for further information.

Towing With HSA

HSA will also provide assistance to mitigate roll

back while towing a trailer.

WARNING!

There may be situations where the Hill Start

Assist (HSA) will not activate and slight rolling

may occur, such as on minor hills or with a

loaded vehicle, or while pulling a trailer. HSA is

not a substitute for active driving involvement. It

is always the driver’s responsibility to be

attentive to distance to other vehicles, people,

and objects, and most importantly brake

operation to ensure safe operation of the vehicle

under all road conditions. Your complete

attention is always required while driving to

maintain safe control of your vehicle. Failure to

follow these warnings can result in a collision or

serious personal injury.

WARNING!



If you use a trailer brake controller with your

trailer, the trailer brakes may be activated and

deactivated with the brake switch. If so, there

may not be enough brake pressure to hold

both the vehicle and the trailer on a hill when

the brake pedal is released. In order to avoid

rolling down an incline while resuming accel

eration, manually activate the trailer brake or

apply more vehicle brake pressure prior to

releasing the brake pedal.



HSA is not a parking brake. Always apply the

parking brake fully when exiting your vehicle.

Also, be certain to place the transmission in

PARK.



Failure to follow these warnings can result in a

collision or serious personal injury.

SAFETY

257

Rain Brake Support (RBS)

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 RBS

is active, there is no notification to the driver and

no driver interaction is required.

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

Controller (EBC) will prepare the brake system for

a panic stop.

Traction Control System (TCS)

The TCS monitors the amount of wheel spin of

each of the driven wheels. If wheel spin is

detected, the TCS may apply brake pressure to the

spinning wheel(s) and/or reduce engine power to

provide enhanced acceleration and stability. A

feature of the TCS, Brake Limited Differential (BLD)

functions similarly to a 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 power

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.

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.

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

page 187.

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.

AUXILIARY DRIVING SYSTEMS

LIND

POT

ONITORING

(BSM)

BSM system uses two radar sensors, located

inside the rear fascia/bumper, to detect highway

licensable vehicles (automobiles, trucks,

motorcycles, etc.) that enter the blind spot zones

from the rear/front/side of the vehicle.

Rear Detection Zones

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.

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.

258

SAFETY

The BSM detection zone covers approximately one

lane in width on both sides of the vehicle 12 ft

(3.8 m). The zone length starts at the side of the

vehicle, near the B-pillar, 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 approximately

6 mph (10 km/h) or higher and will alert the driver

of vehicles in these areas. BSM will alert earlier on

faster-approaching vehicles — up to 15 mph

(24 km/h) difference.
NOTE:



The BSM system DOES NOT alert the driver

about rapidly approaching vehicles (greater

then 15 mph) that are outside the detection

zones.



The BSM system detection zone DOES NOT

change if your vehicle is towing a trailer. There

fore, visually verify the adjacent lane is clear for

both your vehicle and trailer before making a

lane change. If the trailer or other object (i.e.,

bicycle, sports equipment) extends beyond the

side of your vehicle, this may result in random

false detections on the trailer, and false chimes

when the turn signal is used

page 204.



The BSM system may experience dropouts

(blinking on and off) of the side mirror warning

indicator lamps when a motorcycle or any small

object remains at the side of the vehicle for

extended periods of time (more than a couple of

seconds).

The area on the rear fascia/bumper where the

radar sensors are located must remain free of

snow, ice, and dirt/road contamination so that the

BSM system can function properly. Do not block

the area of the rear fascia/bumper where the

radar sensors are located with foreign objects

(bumper stickers, bicycle racks, etc.).

Sensor Location (Left Side Shown)

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,

when the turn signal is activated during the alert on

the side of the vehicle corresponding to the alert,

an audible (chime) alert can be heard. During this

audible (chime) alert, the radio volume will be

reduced

page 261.

BSM Warning Light

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.

SAFETY

259

Entering From The Side
Vehicles that move into your adjacent lanes from

either side of the vehicle.

Side Monitoring

Entering From The Rear
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).

Rear Monitoring

Overtaking Traffic
If you pass another vehicle slowly with a relative

speed of 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.

Overtaking/Approaching

Overtaking/Passing

260

SAFETY

The BSM system is designed not to issue an alert

on stationary objects such as guardrails, posts,

walls, foliage, berms, etc. However, occasionally

the system may alert on such objects. This is

normal operation and your vehicle does not require

service.
The BSM system will not alert you of objects that

are traveling in the opposite direction of the vehicle

in adjacent lanes

page 410.

Opposing Traffic

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.

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 5 mph (8 km/h), to objects

moving a maximum of approximately 20 mph

(32 km/h), such as in parking lot situations.
NOTE:

In a parking lot situation, oncoming vehicles can be

obscured 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.

WARNING!

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.

SAFETY

261

When RCP is on (Blind Spot Lights Only or Blind

Spot Lights/Chimes) and the vehicle is in

REVERSE, the driver is alerted using both the

visual and audible alarms, including reducing the

radio volume.

Blind Spot Modes

Three selectable modes of operation are available

in the Uconnect system

page 204.

Blind Spot Alert Lights Only
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.
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.

Blind Spot Alert Off
When the BSM system is turned off, there will be

no visual or audible alerts from either the BSM or

RCP systems.
NOTE:

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.

ORWARD

OLLISION

ARNING

(FCW)

ITH

ITIGATION

The FCW with Mitigation system provides the driver

with audible warnings, visual warnings (within the

instrument cluster display), and may apply a

limited braking 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:

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 a forward collision is probable, the driver will

be provided with audible and visual warnings and

may provide a brake jerk warning.

WARNING!

Rear Cross Path (RCP) Detection is not a back up

aid system. It is intended to be used to help a

driver detect a 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.

262

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.
If a Forward Collision Warning with Mitigation event

begins at a speed below 39 mph (62 km/h), the

system may provide maximum braking 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 a standstill for two seconds and then release the

brakes.

FCW Message

When the system determines a collision with the

vehicle in front of you is no longer probable, the

warning message will be deactivated

page 410.

NOTE:



The minimum speed for FCW activation is

3 mph (5 km/h).



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.



It is unsafe to test the FCW system. To prevent

such misuse of the system, after four Active

Braking events within an ignition cycle, the

Active Braking portion of FCW will be deacti

vated until the next ignition cycle.



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 unnec

essary warnings to the surroundings. If the

vehicle enters 4WD Low, the FCW system will be

automatically deactivated.

FCW Braking Status And Sensitivity

The FCW Sensitivity and Active Braking status are

programmable through the Uconnect system

page 204.

NOTE:



The default sensitivity of FCW is the “Medium”

setting and the system status is “Warning &

Braking”. This allows the system to warn the

driver of a possible collision with the vehicle in

front using audible/visual warnings and it

applies autonomous braking.



Changing the FCW status to the “Far” setting

allows the system to warn the driver of a

possible collision with the vehicle in front using

an audible/visual warning when the latter is at a

farther distance than the “Medium” setting. This

provides the most reaction time to avoid a

possible collision.

WARNING!

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.

SAFETY

263



Changing the FCW status to the “Near” setting

allows the system to warn the driver of a

possible collision with the vehicle in front when

the distance between the vehicle in the front is

much closer. This setting provides less reaction

time than the “Far” and “Medium” settings,

which allows for a more dynamic driving experi

ence.

NOTE:



Changing the FCW status to “Only 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, but maintains the

audible and visual warnings.



Changing the FCW status to “Off” prevents the

system from providing autonomous braking, or

additional brake support if the driver is not

braking adequately in the event of a potential

frontal collision.



The system will retain the last setting selected

by the driver after ignition shut down.



FCW may not react to irrelevant objects such as

overhead 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.



FCW will be disabled like ACC, with the unavail

able screens.

FCW Limited Warning

If the instrument cluster displays “Automatic

Emergency Braking (AEB) Limited Service

Required” or “Limited Functionality Clean Front

Windshield” momentarily, there may be a

condition that limits FCW functionality. Although

the vehicle is still drivable 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 to its full performance state. If

the problem persists, see an authorized dealer.

Service FCW Warning

If the system turns off, the instrument cluster

displays “AEB Unavailable Service Required.”
AEB Unavailable Service Required indicates there

is an internal system fault. Although the vehicle is

still drivable under normal conditions, have the

system checked by an authorized dealer.

Pedestrian Emergency Braking (PEB) —

If Equipped

PEB is a subsystem of the Forward Collision

Warning (FCW) system which provides the driver

with audible warnings and visual warnings, in the

instrument cluster display. It may apply limited

automatic braking when it detects a potential

frontal collision with a pedestrian.

PEB Message

If a PEB event begins at a speed below 39 mph

(62 km/h), the system may provide maximum

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 pedestrian/cyclist in front of you is no

longer probable, the warning message will be

deactivated.
The minimum speed for PEB activation is 3 mph

(5 km/h).

264

SAFETY

Turning PEB On Or Off
NOTE:

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

system to warn you of a possible frontal collision

with the pedestrian.
The PEB button is located in the Uconnect display

in the Control settings

page 204.

To turn the PEB system off, push the Pedestrian

Emergency Braking button.
To turn the PEB system back on, push the Warning

Active Braking button.
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/cyclist.

NOTE:

The PEB system will retain the last setting selected

by the driver after ignition shut down. The system

will not reset to the default setting when the

vehicle is restarted.

Intersection Collision Assist (ICA) —

If Equipped

ICA uses three front radar sensors located in the

front fascia/bumper, to detect oncoming vehicles

from the front or side when driving through an

intersection. When the system determines that a

collision is probable when turning across

oncoming traffic, the system will attempt to

mitigate a possible collision by decelerating the

vehicle. When the system determines that a

collision with a crossing vehicle is probable, the

system may apply additional braking to

supplement the driver braking input to attempt to

mitigate a possible collision. The system will also

provide audible warnings and visual warnings

(shown in the instrument cluster). If the driver

determines acceleration is needed to avoid a

collision, when the accelerator is pressed ICA will

cancel.

IRE

RESSURE

ONITORING

YSTEM

(TPMS)

The TPMS will warn the driver of a low tire pressure

based on the vehicle recommended cold tire

pressure

page 410.

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 tire

pressure will also increase as the vehicle is driven

— this is normal and there should be no

adjustment for this increased pressure.
For information on how to properly inflate the

vehicle’s tires, see

page 378.

The TPMS will warn the driver of a low tire pressure

if the tire pressure falls below the low pressure

warning threshold for any reason, including low

temperature effects, or natural pressure loss

through the tire.

WARNING!

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.

SAFETY

265

(Continued)

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

recommended cold tire pressure. Once the low tire

pressure warning has been illuminated, the tire

pressure must be increased to the recommended

cold tire pressure in order for the TPMS Warning

Light to be turned off.
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 TPMS Warning Light off.
The system will automatically update and the

TPMS Warning Light will extinguish once the

updated tire pressures have been received. The

vehicle may need to be driven for up to 20 minutes

above 15 mph (24 km/h) to receive this

information.
For example, your vehicle has a recommended

cold (parked for more than three hours) tire

pressure of 36 psi (248 kPa). If the ambient

temperature is 68°F (20°C) and the measured tire

pressure is 28 psi (193 kPa), a temperature drop

to 20°F (-7°C) will decrease the tire pressure to

approximately 24 psi (165 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 28 psi (193 kPa), but the

TPMS Warning Light will still be on. In this situation,

the TPMS Warning Light will turn off only after the

tires have been inflated to the vehicle’s

recommended cold tire 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, unless

equipped with Tire Fill Alert.



Driving on a significantly underinflated tire

causes the tire to overheat and can lead to tire

failure. Underinflation also reduces fuel effi

ciency and tire tread life, and may affect the

vehicle’s handling and stopping ability.



The TPMS is not a substitute for proper tire

maintenance, and it is the driver’s responsibility

to maintain correct tire pressure using an accu

rate tire gauge, even if underinflation has not

reached the level to trigger illumination of the

TPMS Warning Light.



Seasonal temperature changes will affect tire

pressure, and the TPMS will monitor the actual

tire pressure in the tire.

CAUTION!



The TPMS has been optimized for the original

equipment tires and wheels. TPMS pressures

and warnings have been established for the

tire size equipped on your vehicle. Undesir

able system operation or sensor damage may

result when using replacement equipment

that is not of the same size, type, and/or style.

The TPMS sensor is not designed for use on

aftermarket wheels and may contribute to a

poor overall system performance or sensor

damage. Customers are encouraged to use

OEM wheels to ensure proper TPMS feature

operation.



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 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 Tire Pres

sure Monitoring System sensor.

CAUTION!

266

SAFETY

The Tire 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.

Tire Pressure Monitoring System Display

NOTE:

It is particularly important for you to regularly check

the tire pressure in all of your tires and to maintain

the proper pressure.
The Tire Pressure Monitoring System (TPMS)

consists of the following components:



Receiver module



Four Tire Pressure Monitoring System sensors



Various Tire Pressure Monitoring System

messages, which display in the instrument

cluster, and a graphic displaying tire pressures



TPMS Warning Light

Tire Pressure Monitoring System Low

Pressure Warnings

The TPMS Warning Light will illuminate in

the instrument cluster, and an audible

chime will be activated, when one or

more of the four active road tire

pressures are low. In addition, the instrument

cluster will display an "Inflate to XX" message and

a graphic display of the pressure value(s) with the

low tire(s) in a different color

page 99.

NOTE:

Your system can be set to display pressure units in

PSI, BAR, or kPa.

Low Tire Pressure Monitoring System Display

Should a low tire condition occur on any of the four

active road tire(s), you should stop as soon as

possible, and inflate the low tire(s) that is in a

different color on the graphic display to the

vehicle’s recommended cold tire pressure

displayed in the “Inflate to XX” message.
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 TPMS Warning Light off.
The system will automatically update, the graphic

display of the pressure value(s) will return to its

original color and the TPMS Warning Light will

extinguish once the updated tire pressure(s) have

been received. The system will automatically

update the graphic display of the pressure value(s)

and will return to its original color. The TPMS

Warning Light will extinguish once the updated tire

pressure(s) have been received in the case when

the ignition is ON. In the case when the ignition is

OFF, the ignition on the vehicle has to be turned ON

and may need to be driven for up to 20 minutes

above 15 mph (24 km/h) to receive this

information for the pressure value(s) to be

updated.

SAFETY

267

Service TPMS Warning

The Tire Pressure Monitoring System Warning Light

will flash on and off for 75 seconds, and remain on

solid when a system fault is detected. The system

fault will also sound a chime. The instrument

cluster display will display a “SERVICE TPM

SYSTEM” message for a minimum of five seconds.

This message is then followed by a graphic display,

with “--“ in place of the pressure value(s),

indicating which Tire Pressure Monitoring System

sensor(s) is not being received.
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, the "SERVICE TPM SYSTEM" message will

not be present, and a pressure value will be

displayed instead of dashes. A system fault can

occur by any of the following:



Jamming due to electronic devices or driving

next to facilities emitting the same Radio

Frequencies as the TPMS sensors.



Lots of snow or ice around the wheels or wheel

housings.



Using tire chains on the vehicle.



Using wheels/tires not equipped with TPMS

sensors.

NOTE:

A TPMS sensor is not offered on any size spare tire.

In either option of having a full size spare equipped

or not, the tire pressure is not monitored or

displayed on the cluster for the corresponding

spare tire location. If you install the 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

Warning Light will remain on, a chime will sound,

and the instrument cluster display will still display

a pressure value in the different color graphic

display and an “Inflate to XX” message will be

displayed. After driving the vehicle for up to

20 minutes above 15 mph (24 km/h), the Tire

Pressure Monitoring System Warning Light will

flash on and off for 75 seconds and then remain on

solid. In addition, the instrument cluster display

will display a “SERVICE TPM SYSTEM" message for

five seconds and then display dashes (--) in place

of the pressure value. For each subsequent

ignition switch cycle, a chime will sound, the Tire

Pressure Monitoring System Warning Light will

flash on and off for 75 seconds and then remain on

solid, and the instrument cluster display will

display a "SERVICE TPM SYSTEM" message for five

seconds and then display dashes (--) in place of the

pressure value. Once you repair or replace the

original road tire, and reinstall it on the vehicle in

place of the spare tire, the TPMS will update

automatically.

In addition, the Tire Pressure Monitoring System

Warning Light will turn off and the graphic in the

instrument cluster display 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.

TPMS Deactivation — If Equipped

The Tire Pressure Monitoring System (TPMS) can

be deactivated by replacing all four wheel and tire

assemblies (road tires) with wheel and tire

assemblies that do not have TPMS sensors, such

as when installing winter wheel and tire

assemblies on your vehicle.
To deactivate the TPMS, first, replace all four wheel

and tire assemblies (road tires) with tires not

equipped with Tire Pressure Monitoring System

sensors. Then, drive the vehicle for 20 minutes

above 15 mph (24 km/h). The TPMS will chime,

the TPMS Warning Light will flash on and off for

75 seconds and then remain on. The instrument

cluster will display the “SERVICE TPM SYSTEM”

message and then display dashes (--) in place of

the pressure values.

Jeep Grand Cherokee (2022 year). Manual in english - page 16