2015 JEEP CHEROKEE engine overheat

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 press 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.
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.
(Continued)
CAUTION!(Continued)
•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).
NOTE:Press the “ESC Off” switch (if necessary), to place
the Electronic Stability Control (ESC) system in “Partial
Off” mode, before rocking the vehicle. Refer to “Elec-
tronic Brake Control” in “Starting And Operating” for
further information. Once the vehicle has been freed,
press the#ESC Off#switch again to restore “ESC On”
mode.
6
WHAT TO DO IN EMERGENCIES 645

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.
(Continued)
CAUTION!(Continued)
•Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition.
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.
7
MAINTAINING YOUR VEHICLE 685

NOTE:Intentional tampering with emissions control
systems 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 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!
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 or coolant bottle is hot.
686 MAINTAINING YOUR VEHICLE

•Mixing engine coolant (antifreeze) types is not recom-
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency,
have a authorized dealer drain, flush, and refill with
OAT coolant (conforming to MS-12106) 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
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.
690 MAINTAINING YOUR VEHICLE

Electric Parking Brake......................511
Electric Remote Mirrors.....................138
Electronic Brake Control System...............519
Electronic Range Select (ERS).................492
Electronic Roll Mitigation (ERM)..............523
Electronic Speed Control (Cruise Control)........187
Electronic Stability Control (ESC)..............533
Electronic Vehicle Information Center (EVIC)......286
Change Engine Oil......................351
Selectable Menu Items....................356
Emergency, In Case of
Hazard Warning Flasher..................615
Jacking...............................628
Jump Starting..........................640
Overheating...........................615
Emission Control System Maintenance..........658
Engine.................................655
Air Cleaner...........................664
Block Heater..........................480
Break-In Recommendations................116
Checking Oil Level......................661
Coolant (Antifreeze).....................728
Cooling..............................686
Exhaust Gas Caution.....................117
Fails to Start...........................474
Flooded, Starting.......................474
Fuel Requirements......................579
Jump Starting..........................640
Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..661
Oil Filler Cap..........................655
Oil Filter.............................664
Oil Selection...........................662
Oil Synthetic..........................663
Overheating...........................615
Starting..............................472
Temperature Gauge......................338
EngineOil Viscosity.......................663
Engine Oil Viscosity Chart...................66310
INDEX 753

Heated...............................140
Outside..............................137
Rearview.............................130
Vanity...............................140
Modifications/Alterations, Vehicle...............8
Monitor, Tire Pressure System................568
MOPAR® Parts...........................659
MTBE/ETBE............................580
Multi-Function Control Lever.................173
New Vehicle Break-In Period.................116
Occupant Restraints........................52
Octane Rating, Gasoline (Fuel)................579
Odometer...............................333
Tr i p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..333
Oil, Engine..............................661
Capacity.............................727
Change Interval........................662
Checking.............................661
Dipstick..............................661
Disposal..............................664
Filter................................664
Filter Disposal.........................664
Identification Logo......................662
Materials Added to......................663
Recommendation.......................662
Synthetic.............................663
Viscosity.............................663
Oil Filter, Change.........................664
Oil Filter, Selection........................664
Onboard Diagnostic System..................657
Opener, Garage Door (HomeLink®)............288
Operating Precautions......................657
Operator Manual (Owner’s Manual).............5
Outside Rearview Mirrors...................137
Overheating, Engine.......................338
760 INDEX