2017 JEEP GRAND CHEROKEE heating

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

If frequent jump-starting is required to start your vehicle
you should have the battery and charging system tested at
your authorized dealer.
CAUTION!
Accessories plugged into the vehicle power outlets
draw power from the vehicle’s battery, even when not
in use (i.e., cellular devices, etc.). Eventually, if plugged
in long enough without engine operation, the vehicle’s
battery will discharge sufficiently to degrade battery
life and/or prevent the engine from starting.
REFUELING IN EMERGENCY
The funnel for the Cap-Less Fuel System is located in the
spare tire storage area. If your vehicle is out of fuel and an
auxiliary fuel can is needed, insert the funnel into the filler
neck and proceed to fill the vehicle.
For more information on the Cap-Less Fuel System refer to
“Refueling The Vehicle” in “Starting And Operating ” in
this manual.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate action.
•On the highways — slow down.
• In city traffic — while stopped, place the transmission in
NEUTRAL, but do not increase the engine idle speed
while preventing vehicle motion with the brakes.
NOTE: There are steps that you can take to slow down an
impending overheat condition:
• If your air conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
• You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control to
high. This allows the heater core to act as a supplement
to the radiator and aids in removing heat from the
engine cooling system.
428 IN CASE OF EMERGENCY

WARNING!
Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause damage, or even
failure, of the axle and tires. A tire could explode and
injure someone. Do not spin your vehicle’s wheels
faster than 30 mph (48 km/h) or for longer than 30
seconds continuously without stopping when you are
stuck and do not let anyone near a spinning wheel, no
matter what the speed.
CAUTION!
•Racing the engine or spinning the wheels may lead
to transmission overheating and failure. Allow the
engine to idle with the transmission in NEUTRAL
for at least one minute after every five rocking-
motion cycles. This will minimize overheating and
reduce the risk of transmission failure during pro-
longed efforts to free a stuck vehicle.
• When “rocking” a stuck vehicle by shifting between
DRIVE and REVERSE, do not spin the wheels faster
than 15 mph (24 km/h), or drivetrain damage may
result.
(Continued)
CAUTION! (Continued)
•Revving the engine or spinning the wheels too fast
may lead to transmission overheating and failure. It
can also damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis-
sion shifting occurring).
TOWING A DISABLED VEHICLE
This section describes procedures for towing a disabled
vehicle using a commercial towing service. If the transmis-
sion and drivetrain are operable, disabled vehicles may
also be towed as described under “Recreational Towing” in
the “Starting and Operating” section.
NOTE: Vehicles equipped with Quadra-Lift must be
placed in Transport mode, before tying them down (from
the body) on a trailer or flatbed truck. Refer to the section
on Quadra-Lift for more information. If the vehicle cannot
be placed in Transport mode (for example, engine will not
run), tie-downs must be fastened to the axles (not to the
body). Failure to follow these instructions may cause fault
codes to be set and/or cause loss of proper tie-down
tension.
7
IN CASE OF EMERGENCY 433

CAUTION!
•The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective-
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
• Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage. NOTE:
Intentional tampering with emissions control sys-
tems can result in civil penalties being assessed against
you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe and
abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer’s specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter damage:
• Do not shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
• Do not try to start the engine by pushing or towing the
vehicle.
• Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
466 SERVICING AND MAINTENANCE

Tires — General Information
Tire Pressure
Proper tire inflation pressure is essential to the safe and
satisfactory operation of your vehicle. Four primary areas
are affected by improper tire pressure:
•Safety and Vehicle Stability
• Economy
• Tread Wear
• Ride Comfort
Safety
WARNING!
• Improperly inflated tires are dangerous and can
cause collisions.
• Underinflation increases tire flexing and can result
in overheating and tire failure.
• Overinflation reduces a tire’s ability to cushion
shock. Objects on the road and chuckholes can cause
damage that result in tire failure.
(Continued)
WARNING! (Continued)
•Overinflated or underinflated tires can affect vehicle
handling and can fail suddenly, resulting in loss of
vehicle control.
• Unequal tire pressures can cause steering problems.
You could lose control of your vehicle.
• Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the right
or left.
• Always drive with each tire inflated to the recom-
mended cold tire inflation pressure.
Both under-inflation and over-inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
NOTE:
• Unequal tire pressures from side to side may cause
erratic and unpredictable steering response.
• Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
8
SERVICING AND MAINTENANCE 483

DipsticksOil (Engine) ........................... .448
Disabled Vehicle Towing .....................433
Disposal Antifreeze (Engine Coolant) .................470
Do Not Disturb ........................... .606
Door Ajar ............................... .156
Door Ajar Light ........................... .156
Door Opener, Garage ....................... .109
Driver’s Seat Back Tilt ........................41
Driving ................................. .389
DVD Player (Video Entertainment System) .........571
Economy (Fuel) Mode ...................... .274
Electrical Outlet, Auxiliary (Power Outlet) .........122
Electric Remote Mirrors .......................63
Electronic Brake Control System ................181
Anti-Lock Brake System ....................180
Electronic Roll Mitigation ...................188
Traction Control System ....................184
Electronic Speed Control (Cruise Control) . . .296, 297, 299
Electronic Stability Control (ESC) ...............185
Electronic Throttle Control Warning Light .........155
Emergency, In Case Of Freeing Vehicle When Stuck .................432 Hazard Warning Flasher
...................398
Jacking ............................... .475
Jump Starting .......................... .425
Tow Hooks ............................ .436
Emission Control System Maintenance ............177
Engine .............................. .445, 447
Air Cleaner ............................ .452
Block Heater ........................... .270
Break-In Recommendations .................270
Checking Oil Level ...................... .448
Compartment ....................445, 446, 447
Compartment Identification ..............445, 446
Coolant (Antifreeze) ..................... .512
Cooling .............................. .467
Exhaust

Gas Caution ...................256, 510
Fails To Start ........................... .267
Flooded, Starting ........................ .267
Identification ........................... .447
Jump Starting .......................... .425
Oil ........................... .450, 511, 512
Oil Filler Cap ....................... .445, 451
Oil Filter .............................. .452
Oil Selection ........................ .450, 511
Oil Synthetic ........................... .451
Overheating ........................... .428
12
INDEX 619

Onboard Diagnostic System...................176
Opener, Garage Door (HomeLink) ...............109
Operating Precautions ...................... .176
Operator Manual (Owner’s Manual) ...............5
Outside Rearview Mirrors .....................62
Overhead Console ..........................118
Overheating, Engine ....................... .428
Owner’s Manual (Operator Manual) ...........5,614
Paddle Shifters ........................... .281
Paint Care ............................... .498
Parking Brake ............................ .271
ParkSense System, Rear ...................319, 328
Personalized Menu Bar ..................... .517
Pets ................................... .255
Placard, Tire And Loading Information ...........479
Power Brakes ............................... .505
Distribution Center (Fuses) ..................411
Door Locks ..............................35
Inverter .............................. .126
Lift Gate .............................. .103
Mirrors ................................63
Outlet (Auxiliary Electrical Outlet) ............122
Seats ..................................46 Steering
.............................. .295
Sunroof ............................. .92, 95
Tilt/Telescoping Steering Column ..............59
Windows ...............................90
Power Seats Forward ................................46
Rearward ...............................46
Recline .................................47
Pregnant Women And Seat Belts ................221
Preparation For Jacking ..................... .418
Pretensioners Seat Belts ............................. .221
Quadra-Trac ............................. .283
Radial Ply Tires ........................... .485
Radiator Cap (Coolant Pressure Cap) .............469
Radio Frequency General Information .................... .30, 32
Radio

Operation .......................... .587
Radio Remote Controls ..................... .570
Rain Sensitive Wiper System ...................77
Rear Axle (Differential) ..................... .474
Rear Camera ............................. .364
Rear Cross Path ........................... .201
624 INDEX