sensor JEEP GRAND CHEROKEE 2021 Owner handbook (in English)

downhill. This is normal operation and nec-
essary to maintain set speed. When driving
up hill and down hill, the ACC system will
cancel if the braking temperature exceeds
normal range (overheated).
Setting The Following Distance In ACC
The specified following distance for ACC can
be set by varying the distance setting be-
tween four bars (longest), three bars (long),
two bars (medium) and one bar (short). Using
this distance setting and the vehicle speed,
ACC calculates and sets the distance to the
vehicle ahead. This distance setting displays
in the instrument cluster display.
To increase the distance setting, push the
Distance Setting — Increase button and re-
lease. Each time the button is pushed, the
distance setting increases by one bar (lon-
ger).
To decrease the distance setting, push the
Distance Setting — Decrease button and re-
lease. Each time the button is pushed, the
distance setting decreases by one bar
(shorter).
PARKSENSE REAR PARK
ASSIST — IF EQUIPPED
The ParkSense Rear Park Assist system pro-
vides visual and audible indications of the
distance between the rear fascia and a de-
tected obstacle when backing up, e.g. during
a parking maneuver. If your vehicle is
equipped with an automatic transmission,
the vehicle brakes may be automatically ap-
plied and released when performing a reverse
parking maneuver if the system detects a
possible collision with an obstacle.
Refer to “ParkSense System Usage Precau-
tions” in this section for limitations of this
system and recommendations.
ParkSense will retain the last system state
(enabled or disabled) from the last ignition
cycle when the ignition is changed to the
ON/RUN position.
ParkSense Sensors
The four ParkSense sensors, located in the
rear fascia/bumper, monitor the area behind
the vehicle that is within the sensors’ field of
view. The sensors can detect obstacles from
approximately 12 inches (30 cm) up to
79 inches (200 cm) from the rear fascia/
bumper in the horizontal direction, depend-
ing on the location, type and orientation of
the obstacle.
ParkSense Warning Display
The ParkSense Warning screen will only be
displayed if Sound and Display is selected
from the Customer - Programmable Features
section of the Uconnect System.
Refer to "Uconnect Settings” in “Multime-
dia” in your Owner’s Manual for further infor-
mation.
The ParkSense Warning screen is located
within the instrument cluster display. It pro-
vides visual warnings to indicate the distance
between the rear fascia/bumper and the de-
tected obstacle.
177

Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
Enabling And Disabling ParkSense
ParkSense can be enabled and disabled with
the ParkSense switch.
When the ParkSense switch is
pushed to disable the system, the
instrument cluster will display the
“PARKSENSE OFF” message for
approximately five seconds. When the gear
selector is moved to REVERSE and the sys-
tem is disabled, the instrument cluster dis-
play will display the “PARKSENSE OFF”
message for as long as the vehicle is in
REVERSE.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when
the system is enabled. If the ParkSenseswitch is pushed, and the system requires
service, the ParkSense switch LED will blink
momentarily, and then the LED will be on.
ParkSense System Usage Precautions
NOTE:
• Ensure that the rear bumper is free of snow,
ice, mud, dirt and debris to keep the
ParkSense system operating properly.
• Jackhammers, large trucks, and other vi-
brations could affect the performance of
ParkSense.
• When you turn ParkSense off, the instru-
ment cluster will display “PARKSENSE
OFF.” Furthermore, once you turn
ParkSense off, it remains off until you turn
it on again, even if you cycle the ignition.
• When you move the gear selector to the
REVERSE position and ParkSense is
turned off, the instrument cluster display
will display “PARKSENSE OFF” message
for as long as the vehicle is in REVERSE.
• ParkSense, when on, will reduce the vol-
ume of the radio when it is sounding a tone.• Clean the ParkSense sensors regularly, tak-
ing care not to scratch or damage them.
The sensors must not be covered with ice,
snow, slush, mud, dirt or debris. Failure to
do so can result in the system not working
properly. The ParkSense system might not
detect an obstacle behind the fascia/
bumper, or it could provide a false indica-
tion that an obstacle is behind the fascia/
bumper.
• Use the ParkSense switch to turn the
ParkSense system off if objects such as
bicycle carriers, trailer hitches, etc. are
placed within 12 inches (30 cm) from the
rear fascia/bumper. Failure to do so can
result in the system misinterpreting a close
object as a sensor problem, causing the
“PARKSENSE UNAVAILABLE SERVICE
REQUIRED” message to be displayed in
the instrument cluster display.
• ParkSense should be disabled when the
liftgate is in the open position and the
vehicle is in REVERSE. An open liftgate
could provide a false indication that an
obstacle is behind the vehicle.
STARTING AND OPERATING
178

WARNING!
• Drivers must be careful when backing up
even when using ParkSense. Always
check carefully behind your vehicle, look
behind you, and be sure to check for
pedestrians, animals, other vehicles, ob-
structions, and blind spots before back-
ing up. You are responsible for safety
and must continue to pay attention to
your surroundings. Failure to do so can
result in serious injury or death.
• Before using ParkSense, it is strongly
recommended that the ball mount and
hitch ball assembly is disconnected
from the vehicle when the vehicle is not
used for towing. Failure to do so can
result in injury or damage to vehicles or
obstacles because the hitch ball will be
much closer to the obstacle than the rear
fascia when the loudspeaker sounds the
continuous tone. Also, the sensors could
detect the ball mount and hitch ball
assembly, depending on its size and
shape, giving a false indication that an
obstacle is behind the vehicle.
CAUTION!
• ParkSense is only a parking aid and it is
unable to recognize every obstacle, in-
cluding small obstacles. Parking curbs
might be temporarily detected or not
detected at all. Obstacles located above
or below the sensors will not be detected
when they are in close proximity.
• The vehicle must be driven slowly when
using ParkSense in order to be able to
stop in time when an obstacle is de-
tected. It is recommended that the
driver looks over his/her shoulder when
using ParkSense.
PARKSENSE FRONT AND
REAR PARK ASSIST — IF
EQUIPPED
The ParkSense Park Assist system provides
visual and audible indications of the distance
between the rear and/or front fascia and a
detected obstacle when backing up or moving
forward, e.g. during a parking maneuver. If
your vehicle is equipped with an automatictransmission, the vehicle brakes may be au-
tomatically applied and released when per-
forming a reverse parking maneuver if the
system detects a possible collision with an
obstacle.
Refer to “ParkSense System Usage Precau-
tions” in “Starting And Operating” in your
Owner’s Manual for limitations of this system
and recommendations.
ParkSense will retain the last system state
(enabled or disabled) from the last ignition
cycle when the ignition is changed to the
ON/RUN position.
ParkSense Sensors
The four ParkSense sensors (or six, if
equipped with Active Park Assist), located in
the rear fascia/bumper, monitor the area be-
hind the vehicle that is within the sensors’
field of view. The sensors can detect ob-
stacles from approximately 12 inches
(30 cm) up to 79 inches (200 cm) from the
rear fascia/bumper in the horizontal direc-
tion, depending on the location, type and
orientation of the obstacle.
179

The six ParkSense sensors, located in the
front fascia/bumper, monitor the area in front
of the vehicle that is within the sensors’ field
of view. The sensors can detect obstacles
from approximately 12 inches (30 cm) up to
47 inches (120 cm) from the front fascia/
bumper in the horizontal direction, depend-
ing on the location, type and orientation of
the obstacle.
When an object is detected within 79 inches
(200 cm) behind the rear bumper while the
vehicle is in REVERSE, a warning will appear
in the instrument cluster display. In addition
a chime will sound (when Sound and Display
is selected from the Customer Programmable
Features section of the Uconnect System
screen). As the vehicle moves closer to the
object, the chime rate will change from single
1/2 second tone (for rear only), to slow (for
rear only), to fast, to continuous.Enabling And Disabling ParkSense
ParkSense can be enabled and disabled with
the ParkSense switch.
When the ParkSense switch is
pushed to disable the system, the
instrument cluster will display the
“PARKSENSE OFF” message for
approximately five seconds. When the gear
selector is moved to REVERSE and the sys-
tem is disabled, the instrument cluster dis-
play will display the “PARKSENSE OFF”
message for as long as the vehicle is in
REVERSE.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
NOTE:
When ParkSense is disabled and the gear
selector is moved to the DRIVE position, no
warning message will be displayed.
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when
the system is enabled. If the ParkSenseswitch is pushed, and the system requires
service, the ParkSense switch LED will blink
momentarily, and then the LED will be on.
PARKSENSE ACTIVE PARK
ASSIST SYSTEM — IF
EQUIPPED
The ParkSense Active Park Assist system is
intended to assist the driver during parallel
and perpendicular parking maneuvers by
identifying a proper parking space, providing
audible/visual instructions, and controlling
the steering wheel. The ParkSense Active
Park Assist system is defined as “semi-
automatic” since the driver maintains control
of the accelerator, gear selector and brakes.
Depending on the driver's parking maneuver
selection, the ParkSense Active Park Assist
system is capable of maneuvering a vehicle
into a parallel or a perpendicular parking
space on either side (i.e., driver side or pas-
senger side).
STARTING AND OPERATING
180

NOTE:
• The driver is always responsible for control-
ling the vehicle, responsible for any sur-
rounding objects, and must intervene as
required.
• The system is provided to assist the driver
and not to substitute the driver.
• During a semi-automatic maneuver, if the
driver touches the steering wheel after be-
ing instructed to remove their hands from
the steering wheel, the system will cancel,
and the driver will be required to manually
complete the parking maneuver.
• The system may not work in all conditions
(e.g. environmental conditions such as
heavy rain, snow, etc., or if searching for a
parking space that has surfaces that will
absorb the ultrasonic sensor waves).
•N
ew vehicles from the dealership must have
at least 30 miles (48 km) accumulated be-
fore the ParkSense Active Park Assist system
is fully calibrated and performs accurately.
This is due to the system’s dynamic vehicle
calibration to improve the performance of the
feature. The system will also continuouslyperform the dynamic vehicle calibration to
account for differences such as over or under
inflated tires and new tires.
Enabling And Disabling The ParkSense
Active Park Assist System
The ParkSense Active Park As-
sist system can be enabled and
disabled with the ParkSense Ac-
tive Park Assist switch, located
on the switch panel below the
Uconnect display.
To enable the ParkSense Active Park Assist
system, push the ParkSense Active Park As-
sist switch once (LED turns on).
To disable the ParkSense Active Park Assist
system, push the ParkSense Active Park As-
sist switch again (LED turns off).
When the ParkSense Active Park Assist sys-
tem is enabled the “Active ParkSense
Searching - Push OK to Switch to Perpen-
dicular” message will appear in the instru-
ment cluster display. You may switch to per-
pendicular parking if you desire. Push the OKbutton on the left side steering wheel switch
to change your parking space setting. You
may switch back to parallel parking if you
desire.
When searching for a parking space, use the
turn signal indicator to select which side of
the vehicle you want to perform the parking
maneuver.
NOTE:
If the turn signal is not activated, the
ParkSense Active Park Assist system will au-
tomatically search for a parking space on the
passenger's side of the vehicle.
Refer to your Owner's Manual for further
information.
LANESENSE — IF EQUIPPED
LaneSense Operation
The LaneSense system is operational at
speeds above 37 mph (60 km/h) and below
112 mph (180 km/h). The LaneSense system
uses a forward looking camera to detect lane
markings and measure vehicle position
within the lane boundaries.
181

Cavity Cartridge Fuse Micro Fuse Description
F42 – 20 Amp Yellow Horn
F44 – 10 Amp Red Diagnostic Port
(*)
F45 – 5 Amp Tan Cyber Security Gateway
(*)
F49 – 10 Amp Red Integrated Central Stack/Climate Control
F50 – 20 Amp Yellow Air Suspension Control Module/Slip Differential - If Equipped
(*)
F51 – 15 Amp Blue KIN/RF HUB/Steering Column Lock — If Equipped
(*)
F53 – 20 Amp Yellow Trailer Tow – Left Turn/Stop Lights — If Equipped
(*)
F56 – 15 Amp Blue Additional Content (Diesel Engine Only)
F57 – 20 Amp Yellow NOX Sensor — If Equipped
(*)
F58 – 15 Amp Blue HID Headlamps LH — If Equipped
(*)
F59 – 10 Amp Red Purging Pump (Diesel Engine Only)
(*)
F60 – 15 Amp Blue Transmission Control Module
(*)
F61 – 10 Amp Red Transmission Control Module/PM Sensor (Diesel Engine Only)
(*)
F62 – 10 Amp Red Air Conditioning Clutch
213

Cavity Cartridge Fuse Micro Fuse Description
F63 – 20 Amp Yellow Ignition Coils / Ignition Coil Capacitors / Short Runner Valve Actuator — If
Equipped (Gas) Urea Heater (Diesel)
(*)
F64 – 25 Amp Clear Fuel Injectors/Powertrain
(*)
F66 – 10 Amp Red Sunroof/Rain Sensor/Inside Rear View Mirror / USB Port / DSCR / DTV —
If Equipped
F67 – 15 Amp Blue CD/DVD/UCI Port/USB Charging Port
F68 – 20 Amp Yellow Rear Wiper Motor
F69 – 15 Amp Blue Spotlight Feed — If Equipped
F70 – 20 Amp Yellow Fuel Pump Motor
(*)
F71 – 30 Amp Green Amplifier/ANCM — If Equipped
F72 – 10 Amp Red ECM
(*)
F73 – 15 Amp Blue HID Headlamp RH — If Equipped
(*)
F75 – 10 Amp Red Dual Batt Control — If Equipped
F76 – 10 Amp Red Anti-lock Brakes/Electronic Stability Control
(*)
F77 – 10 Amp Red Drivetrain Control Module/Front Axle Disconnect Module — If Equipped
(*)
F78 – 10 Amp Red Engine Control Module/Electric Power Steering
(*)
IN CASE OF EMERGENCY
214

Cavity Cartridge Fuse Micro Fuse Description
F80 – 10 Amp Red Universal Garage Door Opener/Anti-Intrusion Module — If Equipped/Siren
— If Equipped
F81 – 20 Amp Yellow Trailer Tow Right Turn/Stop Lights — If Equipped
(*)
F82 – 10 Amp Red Steering Column Control Module/Cruise Control/DTV — If Equipped
(*)
F83 – 10 Amp Red Fuel Door
F84 – 15 Amp Blue Instrument Cluster
(*)
F85 – 10 Amp Red Airbag Module
(*)
F86 – 10 Amp Red Airbag Module
(*)
F87 – 10 Amp Red Air Suspension — If Equipped
(*)
F88 – 15 Amp Blue Instrument Panel Cluster/SGW/ITBM — If Equipped
(*)
F90/F91 – 20 Amp Yellow Power Outlet (Rear Seats) Selectable
(*)
F92 – 10 Amp Red Rear Console Lamp — If Equipped
F93 – 20 Amp Yellow Cigar Lighter
F94 – 10 Amp Red Shifter/Transfer Case Module
(*)
F95 – 10 Amp Red Rear Camera / Blind Spot Sensor — If Equipped
F96 – 10 Amp Red Rear Seat Heater Switch/Flashlamp Charger — If Equipped
215

Cavity Cartridge Fuse Micro Fuse Description
F97 – 20 Amp Yellow Rear Heated Seats & Heated Steering Wheel — If Equipped
F98 – 20 Amp Yellow Ventilated Seats/Front Heated Seats — If Equipped
F99 – 10 Amp Red Climate Control/Driver Assistance Systems Module/HALF/Park Assist
F100 – 10 Amp Red Active Damping — If Equipped
(*)
F101 – 15 Amp Blue In Car Temperature Sensor/Humidity Sensor
F102 – 15 Amp Blue Spare
F103 – 10 Amp Red Cabin Heater (Diesel Engine Only)/Rear HVAC — If Equipped
F104 – 20 Amp Yellow Power Outlets (Instrument Panel/Center Console/Rear Cargo — If
Equipped)
(*)
CAUTION!
• When installing the power distribution
center cover, it is important to ensure
the cover is properly positioned and fully
latched. Failure to do so may allow water
to get into the power distribution center
and possibly result in an electrical sys-
tem failure.
• When replacing a blown fuse, it is impor-
tant to use only a fuse having the correct
amperage rating. The use of a fuse with
CAUTION!
a rating other than indicated may result
in a dangerous electrical system over-
load. If a properly rated fuse continues
to blow, it indicates a problem in the
circuit that must be corrected.
IN CASE OF EMERGENCY
216

Checking the oil while the vehicle is on level
ground will improve the accuracy of the oil
level readings. Add oil only when the level on
the dipstick is below the “MIN” mark. The
total capacity from the MIN mark to the MAX
mark is 1 qt (1 L).
CAUTION!
Overfilling or underfilling the crankcase
will cause oil aeration or loss of oil pres-
sure. This could damage your engine.
NOTE:
It is possible for your oil level to be slightly
higher than a previous check. This would be
due to diesel fuel that may temporarily be in
the crankcase due to operation of the diesel
particulate filter regeneration strategy. This
fuel will evaporate out under normal opera-
tion.
Never operate the engine with oil level below
the “MIN” mark or above the upper “MAX”
mark.
WARNING!
• Never smoke while working in the engine
compartment: gas and inflammable va-
pors may be present, with the risk of fire.
• Be very careful when working in the
engine compartment when the engine is
hot: you may get burned. Do not get too
close to the radiator cooling fan: the
electric fan may start; danger of injury.
Scarves, ties and other loose clothing
might be pulled by moving parts.
CAUTION!
• Be careful not to confuse the various
types of fluids while topping up: they are
not compatible with each other! Topping
up with an unsuitable fluid could se-
verely damage your car.
• The oil level must never exceed the MAX
mark.
• Always top up using engine oil of the
same specifications as that already in
the engine.
CAUTION!
• If the engine oil is being topped up, wait
for the engine to cool down before loos-
ening the filler cap, particularly for ve-
hicles with aluminium cap (if
equipped). WARNING: risk of burns!
• Overfilling or underfilling the crankcase
will cause aeration or loss of oil pres-
sure. This could damage your engine.
Adding Washer Fluid
The instrument cluster display will indicate
when the washer fluid level is low. When the
sensor detects a low fluid level, the wind-
shield will light on the vehicle graphic outline
and the “WASHER FLUID LOW” message
will be displayed.
The fluid reservoir for the windshield washers
and the rear window washer is shared. The
fluid reservoir is located in the engine com-
partment, be sure to check the fluid level at
regular intervals. Fill the reservoir with wind-
shield washer solvent only (not radiator anti-
freeze). When refilling the washer fluid reser-
voir, take some washer fluid and apply it to a
cloth or towel and wipe clean the wiper
SERVICING AND MAINTENANCE
254