2012 JEEP WRANGLER overheating

13. Air Bag Warning LightThis light will turn on for four to eight seconds
as a bulb check when the ignition switch is first
turned to ON/RUN. If the light is either not on
during starting, stays on, or turns on while
driving, have the system inspected at an authorized
dealer as soon as possible. Refer to “Occupant Restraints”
in “Things To Know Before Starting Your Vehicle” for
further information.
14. Rear Axle Lock Indicator — If Equipped This light indicates when the rear axle lock has
been activated.
15. Tachometer
Indicates the engine speed in revolutions per minute
(RPM x 1000).CAUTION!
Do not operate the engine with the tachometer
pointer in the red area. Engine damage will occur.
16. Coolant Temperature Warning Light This light warns of an overheated engine condi-
tion. If the light turns on while driving, safely pull
over and stop the vehicle. If the A/C system is on,
turn it off. Also, shift the transmission into NEUTRAL
and idle the vehicle. If the temperature reading does not
return to normal, turn the engine off immediately and
call for service.
NOTE: As the coolant temperature gauge approaches
H, this indicator will illuminate and a single chime will
sound. Further overheating will cause the temperature
gauge to pass H.In this case, the indicator light will
flash continuously and a continuous chime will sound,
until the engine is allowed to cool.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 273

•Most of the time, when in Automatic Operation, you
can temporarily put the system into Recirculation
mode by pressing the Recirculation button. However,
under certain conditions, while in Automatic mode,
the system is blowing air out the defrost vents. When
these conditions are present, and the Recirculation
button is pressed, the indicator will flash and then turn
off. This tells you that you are unable to go into
Recirculation mode at this time. If you would like the
system to go into Recirculation mode, you must first
move the Mode knob to Panel, Panel/Floor and then
press the Recirculation button. This feature reduces the
possibility of window fogging.
Operating Tips
NOTE:Refer to the chart at the end of this section for
suggested control settings for various weather condi-
tions.
Summer Operation
The engine cooling system in air-conditioned vehicles
must be protected with a high-quality antifreeze coolant
to provide proper corrosion protection and to protect
against engine overheating. A solution of 50% ethylene
glycol antifreeze coolant and 50% water is recommended.
Refer to “Maintenance Procedures” in “Maintaining Your
Vehicle” for proper coolant selection.
Winter Operation
Use of the air Recirculation mode during winter months is
not recommended because it may cause window fogging.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e., vacation) for two weeks or more, run the air
conditioning system at idle for about five minutes in the
fresh air and high blower settings. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started again.
364 UNDERSTANDING YOUR INSTRUMENT PANEL

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the
instrument panel below the climate controls.Press 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. Press 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 wear down your battery.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — slow down.
•In city traffic — while stopped, shift transmission into
NEUTRAL, but do not increase engine idle speed.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads HOT
(H), pull over and stop the vehicle. Idle the vehicle
with the air conditioner turned off until the pointer
drops back into the normal range. If the pointer
remains on HOT (H), and you hear continuous
chimes, turn the engine off immediately, and call for
service.
492 WHAT TO DO IN EMERGENCIES

FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand or snow, it
can often be moved by a rocking motion. Turn your
steering wheel right and left to clear the area around the
front wheels. Then shift back and forth between DRIVE
and REVERSE (with automatic transmission) or 1st gear
and REVERSE (with manual transmission). Using mini-
mal accelerator pedal pressure to maintain the rocking
motion, without spinning the wheels, is most effective.
CAUTION!
Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the en-
gine to idle with the shift lever 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 prolonged
efforts to free a stuck vehicle.NOTE:
If your vehicle is equipped with Traction Con-
trol or Electronic Stability Control (ESC), turn the system
OFF before attempting to “rock” the vehicle.
CAUTION!
•When “rocking” a stuck vehicle by moving be-
tween DRIVE and REVERSE (with automatic
transmission) or 1st gear and REVERSE (with
manual transmission), 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
transmission shifting occurring).6
WHAT TO DO IN EMERGENCIES 505

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.
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.
7
MAINTAINING YOUR VEHICLE 529

Emergency, In Case ofJacking ............................ 493
Jump Starting ....................... 501
Tow Hooks ......................... 506
Emission Control System Maintenance ......... 515
Engine Air Cleaner ......................... 520
Block Heater ........................ 375
Break-In Recommendations .............. 84
Compartment ....................... 513
Compartment Identification ............. 513
Exhaust Gas Caution ................86,464
Fails to Start ........................ 373
Flooded, Starting ..................... 373
Fuel Requirements ................. 460,559
Jump Starting ....................... 501
Oil ............................ 518,559
Oil Change Interval ................... 292
Oil Disposal ........................ 520 Oil Filter
........................... 520
Oil Selection ........................ 559
Overheating ........................ 492
Starting ........................... 372
Temperature Gauge ................... 274
Engine Oil Viscosity ...................... 519
Engine Oil Viscosity Chart ................. 519
Enhanced Accident Response Feature .......... 66
Entry System, Illuminated .................. 20
Ethanol ............................... 461
Event Data Recorder ...................... 70
Exhaust Gas Caution ................... 86,464
Exhaust System ....................... 86,527
Extender, Seat Belt ........................ 58
Exterior Finish Care ...................... 542
Exterior Lights .......................... 89
Fabric Care ......................... 544,546
Fabric Top ............................. 546
596 INDEX

Outside Rearview Mirrors.................. 97
Overdrive ............................. 390
Overdrive OFF Switch .................... 390
Overheating, Engine ................... 274,492
Owner’s Manual (Operator Manual) .........6,587
Paint Care ............................. 541
Paint Damage .......................... 541
Panic Alarm ............................ 23
Parking Brake .......................... 414
Passing Light ........................... 152
Personal Settings ........................ 298
Pets .................................. 84
Phone, Cellular .......................... 99
Phone, Hands-Free (Uconnect™) .............. 99
Placard, Tire and Loading Information ......... 439
Polishing and Waxing ..................... 542 Power
Door Locks ......................... 36
Inverter ........................... 166
Mirrors ............................ 98
Steering ........................ 412,413
Windows ........................... 39
Pregnant Women and Seat Belts .............. 57
Preparation for Jacking .................... 495
Pretensioners Seat Belts ........................... 56
Programmable Electronic Features ............ 298
Radial Ply Tires ......................... 446
Radio Operation ........................ 354
Rear Axle (Differential) .................... 541
Rear Swing Gate ......................... 42
Rear Window Defroster ................... 261
Rear Window Features .................... 260
Rear Wiper/Washer ...................... 260
10
INDEX 603