2012 JEEP GRAND CHEROKEE tire pressure

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.
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.
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.
JACKING AND TIRE CHANGING
Run Flat Tires
This vehicle is equipped with run flat tires. Although the
tires are designed with a “run flat” feature that allows the
vehicle to be driven approximately 50 miles (80 km) at
55 mph (88 km/h). immediate service should be ob-
tained.6
WHAT TO DO IN EMERGENCIES 461

WARNING!
Do not exceed 50 mph (80 km/h) if the “Tire Pressure
Monitoring Telltale Light” is illuminated. Vehicle
handling and braking may be reduced. You could
have a collision and be severely or fatally injured.
NOTE:The “run flat” feature eliminates the need for a
spare tire and jack. This vehicle is not equipped with
either a spare tire or jack.
JUMP-STARTING
If your vehicle has a discharged battery it can be jump-
started using a set of jumper cables and a battery in
another vehicle or by using a portable battery booster
pack. Jump-starting can be dangerous if done improperly
so please follow the procedures in this section carefully.NOTE:When using a portable battery booster pack
follow the manufacturer’s operating instructions and
precautions.
CAUTION!
Do not use a portable battery booster pack or any
other booster source with a system voltage greater
than 12 Volts or damage to the battery, starter motor,
alternator or electrical system may occur.
WARNING!
Do not attempt jump-starting if the battery is frozen.
It could rupture or explode and cause personal injury.
Preparations For Jump-Start
The battery in your vehicle is located under the passen-
ger’s front seat. There are remote locations located under
the hood to assist in jump-starting.
462 WHAT TO DO IN EMERGENCIES

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
applicable). If the engine coolant (antifreeze) is dirty orrusty in appearance, the system should be drained,
flushed and refilled with fresh coolant. Check the front of
the A/C condenser for any accumulation of bugs, leaves,
etc. If dirty, clean by gently spraying water from a garden
hose vertically down the face of the condenser.
Check the coolant recovery bottle tubing for brittle rub-
ber, cracking, tears, cuts and tightness of the connection
at the bottle and radiator. Inspect the entire system for
leaks.
With the engine at normal operating temperature (but
not running), check the cooling system pressure cap for
proper vacuum sealing by draining a small amount of
engine coolant (antifreeze) from the radiator drain cock.
If the cap is sealing properly, the engine coolant (anti-
freeze) will begin to drain from the coolant recovery
bottle. DO NOT REMOVE THE COOLANT PRESSURE
CAP WHEN THE COOLING SYSTEM IS HOT.
7
MAINTAINING YOUR VEHICLE 489

Cavity Cartridge
FuseMini
FuseDescription
M27 10 Amp
RedIgnition Switch/
Wireless Control
Module/Keyless
Entry Module
M28 15 Amp
BluePowertrain
Controller/
Transmission Con-
troller
M29 10 Amp
RedTire Pressure Moni-
tor – If Equipped
M30 15 Amp
BlueJ1962 Diag Connec-
tor
M31 20 Amp
YellowBackup Lamps
M32 10 Amp
RedOccupant Restraint
ControllerCavity Cartridge
FuseMini
FuseDescription
M33 10 Amp
RedPowertrain
Controller/
Transmission Con-
troller
M34 10 Amp
RedPark Assist
Module/Climate
Control System
Module/Infra Red
Sensor/Compass
Module
M35 15 Amp
BlueLeft Rear
Parklamps
M36 20 Amp
YellowPower Outlet
M37 10 Amp
RedAntilock Brakes/
Stability Control
System Module
7
MAINTAINING YOUR VEHICLE 509

Information Center (EVIC)/Oil Change Required” in
“Understanding Your Instrument Panel” for further in-
formation.
At Each Stop For Fuel
•Check the engine oil level about five minutes after a
fully warmed engine is shut off. Checking the oil level
while the vehicle is on level ground will improve the
accuracy of the oil level reading. Add oil only when
the level is at or below the ADD or MIN mark.
•Check the windshield washer solvent and add if
required.
Once A Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of the coolant reservoir, brake
master cylinder, and power steering and add as
needed.
•Check all lights and other electrical items for correct
operation.
At Each Oil Change
•Change the engine oil filter.
•Inspect the brake hoses and lines.
CAUTION!
Failure to perform the required maintenance items
may result in damage to the vehicle.
Required Maintenance Intervals
Refer to the Maintenance Schedules on the following
pages for the required maintenance intervals.
8
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SMAINTENANCE SCHEDULES 523

Adaptive Cruise Control (ACC) (Cruise Control) . . 201
Adding Engine Coolant (Antifreeze).......... 491
Adding Fuel........................... 440
Additives, Fuel......................... 438
Air Conditioner Maintenance............... 481
Air Conditioning Refrigerant............... 482
Air Conditioning System.................. 361
Air Conditioning, Operating Tips............ 367
Air Pressure, Tires....................... 419
Airbag.............................. 67,76
Airbag Deployment....................... 78
Airbag Light..................... 75,80,97,284
Airbag Maintenance....................... 79
Airbag, Side........................ 70,73,76
Airbag, Window (Side Curtain)........... 71,73,76
Alarm (Security Alarm)................. 18,292
Alarm, Panic............................ 24
Alterations/Modifications, Vehicle............. 8
Antenna, Satellite Radio................... 347Anti-Lock Brake System (ABS).............. 400
Anti-Lock Warning Light.................. 291
Anti-Theft System....................... 292
Antifreeze (Engine Coolant)..............490,517
Disposal........................... 492
Appearance Care........................ 499
Assistance Towing....................... 125
Auto Down Power Windows................ 41
Automatic Dimming Mirror................ 108
Automatic Door Locks..................... 33
Automatic Headlights.................... 180
Automatic Temperature Control (ATC)......... 361
Automatic Transmission................382,498
Autostick.......................... 389
Fluid Level Check.................... 499
FluidType ......................... 498
Special Additives..................... 498
Autostick............................. 389
Auxiliary Electrical Outlet (Power Outlet)...... 258
548 INDEX

Certification Label....................... 443
Chart, Tire Sizing........................ 410
Check Engine Light (Malfunction Indicator
Light)................................ 473
Checking Your Vehicle For Safety............. 95
Checks, Safety........................... 95
Child Restraint.................... 82,83,87,90
Child Restraint Tether Anchors............. 86,87
Child Safety Locks........................ 33
Clean Air Gasoline....................... 436
Cleaning
Wheels............................ 502
Climate Control......................... 361
Clock .............................327,336
Cold Weather Operation................... 379
Compact Disc (CD) Maintenance............. 360
Compact Spare Tire...................... 422
Compass.............................. 314
Compass Calibration..................... 316Compass Variance....................... 315
Computer, Trip/Travel.................... 311
Connector
UCI .............................. 350
Universal Consumer Interface (UCI)....... 350
Conserving Fuel........................ 309
Console, Overhead....................... 240
Contract, Service........................ 541
Coolant Pressure Cap (Radiator Cap).......... 492
Cooling System......................... 489
Adding Coolant (Antifreeze)............. 491
Coolant Capacity..................... 517
Coolant Level....................489,493
Disposal of Used Coolant............... 492
Drain, Flush, and Refill................ 490
Inspection.......................... 493
Points to Remember.................. 493
Pressure Cap........................ 492
Radiator Cap....................... 492
550 INDEX

Key ............................. 12,14
Ignition Key Removal..................... 14
Illuminated Entry........................ 21
Immobilizer (Sentry Key)................... 16
Infant Restraint........................ 82,83
Inflation Pressure Tires.................... 419
Information Center, Vehicle................. 294
Instrument Cluster....................283,284
Instrument Panel and Controls.............. 282
Instrument Panel Lens Cleaning............. 504
Integrated Power Module (Fuses)............ 504
Interior Appearance Care.................. 503
Intermittent Wipers (Delay Wipers)........... 190
Introduction............................. 4
Inverter, Power......................... 262
Jump Starting.......................... 462
Key-In Reminder......................... 16Key, Programming........................ 18
Key, Replacement........................ 17
Key, Sentry (Immobilizer)................... 16
Keyless Enter-N-Go................. 35,314,376
Keyless Entry System...................... 22
Keyless Go.......................... 12,314
Keys................................. 12
Kicker Sound System..................... 357
Lap/Shoulder Belts....................... 51
LATCH (Lower Anchors and Tether for
CHildren) ............................ 86,87
Latches................................ 99
Lead Free Gasoline...................... 435
Leaks, Fluid............................ 99
LifeofTires ............................ 425
Liftgate................................ 43
Liftgate Flipper Glass...................... 44
Liftgate Window Wiper/Washer............. 274
10
INDEX 555