2015 JEEP GRAND CHEROKEE engine overheat

CAUTION!(Continued)
the vehicle’s battery will discharge sufficiently to
degrade battery life and/or prevent the engine from
starting.
FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand or snow, it
can often be moved using a rocking motion. Turn the
steering wheel right and left to clear the area around the
front wheels. Push and hold the lock button on the shift
lever. Then shift back and forth between DRIVE and
REVERSE while gently pressing the accelerator.
NOTE:Shifts between DRIVE and REVERSE can only be
achieved at wheel speeds of 5 mph (8 km/h) or less.
Whenever the transmission remains in NEUTRAL for
more than two seconds, you must push the brake pedal
to engage DRIVE or REVERSE.Use the least amount of accelerator pedal pressure that
will maintain the rocking motion without spinning the
wheels or racing the engine.
NOTE:Push theESC Offswitch (if necessary), to place
the Electronic Stability Control (ESC) system inPartial
Offmode, before rocking the vehicle. Refer to “Elec-
tronic Brake Control” in “Starting And Operating” for
further information. Once the vehicle has been freed,
push theESC Offswitch again to restoreESC On
mode.
CAUTION!
Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the en-
gine to idle with the transmission in NEUTRAL for at
least one minute after every five rocking-motion
cycles. This will minimize overheating and reduce
(Continued)
6
WHAT TO DO IN EMERGENCIES 519

CAUTION!(Continued)
the risk of transmission failure during prolonged
efforts to free a stuck vehicle.
WARNING!
Fast spinning tires can be dangerous. Forces gener-
ated 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 vehi-
cle’s wheels faster than 30 mph (48 km/h) or for
longer than 30 seconds continuously without stop-
ping when you are stuck and do not let anyone near
a spinning wheel, no matter what the speed.
CAUTION!
•When “rocking” a stuck vehicle by shifting be-
tween DRIVE and REVERSE, do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
•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 trans-
mission shifting occurring).
MANUAL PARK RELEASE
WARNING!
Always secure your vehicle by fully applying the
parking brake, before activating the Manual Park
(Continued)
520 WHAT TO DO IN EMERGENCIES

WARNING!(Continued)
•A hot exhaust system can start a fire if you park
over materials that can burn. Such materials might
be grass or leaves coming into contact with your
exhaust system. Do not park or operate your ve-
hicle in areas where your exhaust system can con-
tact anything that can burn.
CAUTION!
•The catalytic converter requires the use of un-
leaded fuel only. Leaded gasoline will destroy the
effectiveness of the catalyst as an emissions control
device and may seriously reduce engine perfor-
mance and cause serious damage to the engine.
•Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition.
(Continued)
CAUTION!(Continued)
In the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued 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 con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
proper catalyst operation and prevent possible catalyst
damage.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
7
MAINTAINING YOUR VEHICLE 555

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 specifica-
tions, should be obtained immediately.
To minimize the possibility of catalytic converter dam-
age:
•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.Cooling System
WARNING!
•When working near the radiator cooling fan, dis-
connect the fan motor lead or turn the ignition
switch to the OFF position. The fan is temperature
controlled and can start at any time the ignition
switch is in the ON position.
•You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had
time to cool. Never try to open a cooling system
pressure cap when the radiator is hot.
Coolant Checks
Check the engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where
556 MAINTAINING YOUR VEHICLE

HOAT and OAT coolant are mixed in an emergency,
have a authorized dealer drain, flush, and refill with
OAT coolant (conforming to MS.90032) as soon as
possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) will return to the radiator from the coolant
recovery tank.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
WARNING!
•Do not open hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is
overheated. Do not loosen or remove the cap to cool
(Continued)
WARNING!(Continued)
an overheated engine. Heat causes pressure to
build up in the cooling system. To prevent scalding
or injury, do not remove the pressure cap while the
system is hot or under pressure.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or en-
gine damage may result.
Disposal Of Used Engine Coolant
Used ethylene glycol-based engine coolant (antifreeze) is
a regulated substance requiring proper disposal. Check
with your local authorities to determine the disposal
rules for your community. To prevent ingestion by ani-
mals or children, do not store ethylene glycol-based
engine coolant in open containers or allow it to remain in
560 MAINTAINING YOUR VEHICLE

Fails To Start..........................402
Flooded, Starting.......................402
Fuel Requirements...................471, 591
Jump Starting..........................514
Oil ...........................532, 591, 592
Oil Change Interval......................532
Oil Filler Cap.......................533, 534
Oil Filter.............................535
Oil Selection.......................533, 591
Oil Synthetic..........................534
Overheating...........................500
Starting..............................399
Temperature Gauge......................286
Engine Oil Viscosity....................533, 534
Enhanced Accident Response Feature............78
Entry System, Illuminated....................22
Ethanol................................471
Event Data Recorder........................81
Exhaust Gas Caution...................108, 474Exhaust System.......................108, 554
Exterior Lights...........................111
Filters
Air Cleaner...........................535
Air Conditioning.................377, 536, 542
Engine Oil.........................535, 592
Engine Oil Disposal.....................534
Flashers................................500
Hazard Warning........................500
Turn Signal..................111,286, 587, 588
Flooded Engine Starting....................402
Fluid, Brake.............................593
Fluid Capacities..........................591
Fluid Leaks.............................112
Fluid Level Checks
Brake................................563
Cooling System.........................556
Engine Oil............................532
10
INDEX 619

Oil Filter, Selection........................535
Onboard Diagnostic System..................528
Opener, Garage Door (HomeLink®)............242
Operating Precautions......................528
Operator Manual (Owner’s Manual).............6
Outside Rearview Mirrors...................128
Overhead Console.........................240
Overheating, Engine.......................500
Owner’s Manual (Operator Manual)..........6,610
Paint Care..............................568
Panic Alarm..............................25
Parking Brake............................423
ParkSense® System, Rear................218, 227
Passing Light............................175
Passive Entry.............................36
Pets...................................106
Placard, Tire And Loading Information..........444Power
Brakes...............................425
Distribution Center (Fuses)................575
Door Locks............................33
Inverter..............................263
Lift Gate..............................47
Mirrors..............................129
Outlet (Auxiliary Electrical Outlet)...........259
Seats.............................142, 144
Steering..............................422
Sunroof...........................251, 254
Tilt/Telescoping Steering Column............180
Windows..............................41
Power Seats
Down...............................144
Forward..........................142, 144
Rearward.........................142, 144
Up .................................144
Power Steering Fluid.......................593
10
INDEX 625