2017 JEEP GRAND CHEROKEE Owners Manual

6. Insert the wiring harness connector into the protectiveconnector.
7. Store sensor and bracket in a safe place.
NOTE: All cruise control functions will be disabled when
the radar sensor is disconnected.
Radar Sensor Installation Procedure (If Equipped With
Adaptive Cruise Control [ACC]):
1. Disconnect the wiring harness connector from the pro- tective connector on the bumper beam.
2. Remove plug from radar sensor and install in protective connector.
3. Using the previously scribed marks, reinstall the radar sensor and bracket using the two fasteners.
NOTE: Some alignment may be required upon fascia
installation to align sensor with fascia.
4. Install the wiring harness connector into the radar sensor.
NOTE: If you receive a fault, see your authorized dealer
they may need to perform a sensor alignment. Lower Front Fascia Installation
NOTE:
This will only work if you have a helper.
1. Starting at the center of the vehicle, engage a sufficient number of tabs to support the weight of the lower fascia
(typically one or two tabs) into the upper fascia.
2. Working your way outward, engage the tabs into the slots on one side of the vehicle.
3. Return to the center of the vehicle and repeat Step 2 to the opposite side of the vehicle.
NOTE: •It may be necessary to apply additional force to
individual tabs to make sure they are fully engaged.
• Do not use any tools to apply additional force to the
tabs as damage to the upper and lower fascias may
result.
4. Reinstall the seven quarter turn fasteners.
Quadra-Lift — If Equipped
When off-roading, it is recommended that the lowest
useable vehicle height that will clear the current obstacle or
terrain be selected. The vehicle height should then be
raised as required by the changes in terrain.
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The Selec-Terrain switch will automatically change the
vehicle to the optimized height based on the Selec-Terrain
switch position. The vehicle height can be changed from
the default height for each Selec-Terrain mode by normal
use of the air suspension switches. Refer to “Four Wheel
Drive Operation” in “Starting And Operating” for further
information.
When To Use 4WD LOW Range — If Equipped
When off-road driving, shift to 4WD LOW for additional
traction. This range should be limited to extreme situations
such as deep snow, mud, or sand where additional low
speed pulling power is needed. Vehicle speeds in excess of
25 mph (40 km/h) should be avoided when in 4WD LOW
range.
WARNING!
Do not drive in 4WD-LOW Range on dry pavement;
driveline damage may result. 4WD-LOW Range locks
front and rear drivelines together and does not allow
for differential action between the front to rear drive-
shafts. Driving in 4WD-LOW on pavement will cause
driveline binding; use only on wet or slippery surfaces.
Driving Through Water
Although your vehicle is capable of driving through water,
there are a number of precautions that must be considered
before entering the water.
NOTE:Your vehicle is capable of water fording in up to 20
inches (51 cm) of water, while crossing small rivers or
streams. To maintain optimal performance of your vehi-
cle’s heating and ventilation system it is recommended to
switch the system into recirculation mode during water
fording.
CAUTION!
When driving through water, do not exceed 5 mph
(8 km/h). Always check water depth before entering, as
a precaution, and check all fluids afterward. Driving
through water may cause damage that may not be
covered by the New Vehicle Limited Warranty.
Driving through water more than a few inches/centimeters
deep will require extra caution to ensure safety and prevent
damage to your vehicle. If you must drive through water, try
to determine the depth and the bottom condition (and
location of any obstacles) prior to entering. Proceed with
392 STARTING AND OPERATING

caution and maintain a steady controlled speed less than
5 mph (8 km/h) in deep water to minimize wave effects.
Flowing Water
If the water is swift flowing and rising (as in storm run-off),
avoid crossing until the water level recedes and/or the
flow rate is reduced. If you must cross flowing water avoid
depths in excess of 9 inches (23 cm). The flowing water can
erode the streambed, causing your vehicle to sink into
deeper water. Determine exit point(s) that are downstream
of your entry point to allow for drifting.
Standing Water
Avoid driving in standing water deeper than 20 inches
(51 cm), and reduce speed appropriately to minimize wave
effects. Maximum speed in 20 inches (51 cm) of water is
less than 5 mph (8 km/h).
Maintenance
After driving through deep water, inspect your vehicle
fluids and lubricants (engine oil, transmission oil, axle,
transfer case) to assure the fluids have not been contami-
nated. Contaminated fluid (milky, foamy in appearance)
should be flushed/changed as soon as possible to prevent
component damage.
Driving In Snow, Mud And Sand
In heavy snow, when pulling a load, or for additional
control at slower speeds, shift the transmission to a low
gear and shift the transfer case to 4WD LOW if necessary.
Refer to “Four-Wheel Drive Operation” in “Starting and
Operating” for further information. Do not shift to a lower
gear than necessary to maintain forward motion. Over-
revving the engine can spin the wheels and traction will be
lost.
Avoid abrupt downshifts on icy or slippery roads, because
engine braking may cause skidding and loss of control.
Hill Climbing
NOTE:Before attempting to climb a hill, determine the
conditions at the crest and/or on the other side.
Before climbing a steep hill, shift the transmission to a
lower gear and shift the transfer case to 4WD LOW. Use
first gear and 4WD LOW for very steep hills.
If you stall or begin to lose forward motion while
climbing a steep hill, allow your vehicle to come to a stop
and immediately apply the brakes. Restart the engine, and
shift into REVERSE. Back slowly down the hill, allowing
the compression braking of the engine to help regulate
your speed. If the brakes are required to control vehicle
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STARTING AND OPERATING 393

speed, apply them lightly and avoid locking or skidding
the tires.
WARNING!
If the engine stalls, you lose forward motion, or cannot
make it to the top of a steep hill or grade, never attempt
to turn around. To do so may result in tipping and
rolling the vehicle. Always back carefully straight
down a hill in REVERSE gear. Never back down a hill
in NEUTRAL using only the brake.
Remember, never drive diagonally across a hill always
drive straight up or down.
If the wheels start to slip as you approach the crest of a hill,
ease off the accelerator and maintain forward motion by
turning the front wheels slowly. This may provide a fresh
“bite” into the surface and will usually provide traction to
complete the climb.
Traction Downhill
When descending mountains or hills, use Hill Descent or
Selec-Speed Control to avoid repeated heavy braking. If not equipped with Hill Descent or Selec-Speed Control
use the following procedure:
Shift the transmission into a low gear, and the transfer case
into 4WD LOW range. Let the vehicle go slowly down the
hill with all four wheels turning against engine compres-
sion drag. This will permit you to control the vehicle speed
and direction.
When descending mountains or hills, repeated braking can
cause brake fade with loss of braking control. Avoid
repeated heavy braking by downshifting the transmission
whenever possible.
After Driving Off-Road
Off-road operation puts more stress on your vehicle than
does most on-road driving. After going off-road, it is
always a good idea to check for damage. That way you can
get any problems taken care of right away and have your
vehicle ready when you need it.
•
Completely inspect the underbody of your vehicle.
Check tires, body structure, steering, suspension, and
exhaust system for damage.
• Inspect the radiator for mud and debris and clean as
required.
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•Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten them, if required, and torque to the
values specified in the Service Manual.
• Check for accumulations of plants or brush. These things
could be a fire hazard. They might hide damage to fuel
lines, brake hoses, axle pinion seals, and propeller shafts.
• After extended operation in mud, sand, water, or similar
dirty conditions, have the radiator, fan, brake rotors,
wheels, brake linings, and axle yokes inspected and
cleaned as soon as possible.WARNING!
Abrasive material in any part of the brakes may cause
excessive wear or unpredictable braking. You might
not have full braking power when you need it to
prevent a collision. If you have been operating your
vehicle in dirty conditions, get your brakes checked
and cleaned as necessary.
• If you experience unusual vibration after driving in
mud, slush or similar conditions, check the wheels for
impacted material. Impacted material can cause a wheel
imbalance and freeing the wheels of it will correct the
situation.
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IN CASE OF EMERGENCY
CONTENTS
HAZARD WARNING FLASHERS ............398
 ASSIST AND 9–1–1 MIRROR — IF EQUIPPED . . .398
 BULB REPLACEMENT ....................403
▫ Replacement Bulbs .....................403
▫ Bulb Replacement ..................... .405
 FUSES ............................... .410
▫ General Information .....................410
▫ Underhood Fuses ......................411
 JACKING AND TIRE CHANGING ...........417
▫ Jack Location ........................ .417
▫ Spare Tire Stowage .....................418
▫ Preparations For Jacking .................418
▫ Jacking Instructions .....................418
▫ Road Tire Installation ...................424 
JUMP-STARTING ....................... .425
▫ Preparations For Jump-Start ...............425
▫ Jump-Starting Procedure ..................426
 REFUELING IN EMERGENCY ..............428
 IF YOUR ENGINE OVERHEATS .............428
 MANUAL PARK RELEASE .................429
 FREEING A STUCK VEHICLE ..............432
 TOWING A DISABLED VEHICLE ............433
▫ Two-Wheel Drive Models .................435
▫ Four-Wheel Drive Models .................435
 EMERGENCY TOW HOOKS — IF EQUIPPED . . .436
 ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS) .............................. .436
 EVENT DATA RECORDER (EDR) ............437
7

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the switch
bank just above the climate controls.Push the switch to turn on the Hazard Warning
flasher. When the switch is activated, all directional
turn signals will flash on and off to warn oncoming traffic
of an emergency. Push the switch a second time to turn off
the Hazard Warning flashers.
This is an emergency warning system and it should not be
used when the vehicle is in motion. Use it when your
vehicle is disabled and it is creating a safety hazard for
other motorists.
When you must leave the vehicle to seek assistance, the
Hazard Warning flashers will continue to operate even
though the ignition is placed in the OFF position.
NOTE: With extended use, the Hazard Warning flashers
may discharge the battery.
ASSIST AND 9–1–1 MIRROR — IF EQUIPPED
If equipped, the rearview mirror contains an ASSIST and a
9-1-1 button.
WARNING!
ALWAYS obey traffic laws and pay attention to the
road. Some Uconnect Access services, including 9-1-1
and Assist, will NOT work without an operable
1X(voice/data) or 3G(data) network connection.
Assist And 9–1–1 Mirror
398 IN CASE OF EMERGENCY