2012 JEEP LIBERTY Fuel pressure

Tires — General Information ............. 377
▫ Tire Pressure ....................... 377
▫ Tire Inflation Pressures ................ 378
▫ Tire Pressures For High Speed Operation . . . 380
▫ Radial-Ply Tires ..................... 380
▫ Spare Tire Matching Original Equipped Tire
And Wheel – If Equipped .............. 380
▫ Compact Spare Tire – If Equipped ........ 381
▫ Full Size Spare – If Equipped ............ 382
▫ Limited-Use Spare – If Equipped ......... 382
▫ Tire Spinning ....................... 383
▫ Tread Wear Indicators ................. 384
▫ Life Of Tire ........................ 384 ▫
Replacement Tires .................... 385
 Tire Chains .......................... 386
 Tire Rotation Recommendations ........... 388
 Tire Pressure Monitor System (TPMS) ....... 389
▫ Base System ........................ 391
▫ Premium System – If Equipped .......... 394
▫ General Information .................. 399
 Fuel Requirements ..................... 399
▫ Reformulated Gasoline ................ 400
▫ Gasoline/Oxygenate Blends ............. 400
▫ E-85 Usage In Non-Flex Fuel Vehicles ...... 401
▫ MMT In Gasoline .................... 401
▫ Materials Added To Fuel ............... 402
5
STARTING AND OPERATING 317

WARNING! (Continued)
•Unequal tire pressures from one side of the ve-
hicle 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.
Economy
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under-inflation also increases
tire rolling resistance resulting in higher fuel
consumption.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Over-inflation produces a jarring and uncomfortable
ride. Both under-inflation and over-inflation affect thestability of the vehicle and can produce a feeling of
sluggish response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on the
driver’s side “B” Pillar or rear edge of the driver’s side
door.
The pressure should be checked and adjusted, as well as
inspected for signs of tire wear or visible damage, at least
once a month. Use a good quality pocket-type gauge to
check tire pressure. Do not make a visual judgement
when determining proper inflation. Radial tires may look
properly inflated even when they are under-inflated.
378 STARTING AND OPERATING

CAUTION! (Continued)
•After inspecting or adjusting the tire pressure,
always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the valve
stem, which could damage the Tire Pressure Moni-
toring Sensor.
NOTE:
•The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire
failure or condition.
•The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
•Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
•The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver ’s responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if under-inflation has not reached the
level to trigger illumination of the “Tire Pressure
Monitoring Telltale Light.”
•Seasonal temperature changes will affect tire pressure,
and the TPMS will monitor the actual tire pressure in
the tire.
Base System
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the receiver module.
NOTE: It is particularly important for you to check the
tire pressure in all of the tires on your vehicle monthly
and to maintain the proper pressure.
5
STARTING AND OPERATING 391

General Information
This device complies with Part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
•This device may not cause harmful interference.
•This device must accept any interference received,
including interference that may cause undesired
operation.
The tire pressure sensors are covered under one of the
following licenses:
United States ................... MRXC4N3MF9
Canada ...................... 2546A-C4N3MF9
FUEL REQUIREMENTS
All engines are designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when us-
ing high quality unleaded “regular” gaso-
line having an octane rating of 87. The use
of premium gasoline is not recommended,
as it will not provide any benefit over regular gasoline in
these engines.
Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required. Poor quality gasoline can cause problems such
as hard starting, stalling, and hesitations. If you experi-
ence these symptoms, try another brand of gasoline
before considering service for the vehicle.
5
STARTING AND OPERATING 399

Gross Vehicle Weight Rating (GVWR)
The GVWR is the total permissible weight of your vehicle
including driver, passengers, vehicle, options, trailer
tongue weight, and cargo. The label also specifies maxi-
mum capacities of front and rear axle systems (GAWR).
Total load must be limited, so GVWR, and front and rear
GAWR are not exceeded.
Payload
The payload of a vehicle is defined as the allowable load
weight a truck or any given vehicle can carry, including
the weight of the driver, all passengers, options and
cargo.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum permissible load on the front
and rear axles. The load must be distributed in the cargo
area so that the GAWR of each axle is not exceeded.
Each axle’s GAWR is determined by the components in
the system with the lowest load carrying capacity (axle,springs, tires, or wheels). Heavier axles or suspension
components, sometimes specified by purchasers for in-
creased durability, does not necessarily increase the ve-
hicle’s GVWR.
Tire Size
The tire size on the label represents the actual tire size on
your vehicle. Replacement tires must be equal to the load
capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
5
STARTING AND OPERATING 407

About Your Brakes....................... 351
ABS (Anti-Lock Brake System) ............353,356
Adding Engine Coolant (Antifreeze) .......... 475
Adding Fuel ........................... 404
Additives, Fuel ......................... 402
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 465
Air Conditioner Maintenance ............... 467
Air Conditioning ........................ 301
Air Conditioning Controls ................. 301
Air Conditioning Filter .................312,468
Air Conditioning Refrigerant .............467,468
Air Conditioning System .............301,305,467
Air Conditioning, Operating Tips ............ 313
Air Filter .............................. 465
Air Pressure, Tires ....................... 378
Airbag ................................ 59
Airbag Deployment ....................... 74
Airbag Light ..................... 67,76,90,239
Airbag Maintenance ....................... 75 Airbag, Window (Side Curtain)
............... 63
Alarm (Security Alarm) .................18,238
Alarm System (Security Alarm) ............... 18
Alarm, Panic ............................ 24
Alterations/Modifications, Vehicle ............. 8
Antenna, Satellite Radio ................270,295
Anti-Lock Brake System (ABS) ............353,356
Anti-Lock Warning Light .................. 229
Anti-Theft Security Alarm (Theft Alarm) ........ 18
Anti-Theft System ....................... 238
Antifreeze (Engine Coolant) ..............474,502
Disposal ........................... 477
Appearance Care ........................ 486
Arming Theft System (Security Alarm) ......... 18
Assist, Hill Start ........................ 358
Assistance Towing ....................... 117
Auto Down Power Windows ................ 36
Auto Unlock, Doors ....................... 32
Automatic Dimming Mirror ................ 100
534 INDEX

Bulbs, Light.......................... 92,498
Calibration, Compass ..................... 246
Capacities, Fluid ........................ 502
Caps, Filler Fuel .............................. 404
Oil (Engine) ........................ 464
Power Steering ...................... 350
Radiator (Coolant Pressure) ............. 476
Car Washes ............................ 487
Carbon Monoxide Warning ...............89,403
Cargo (Vehicle Loading) ................... 406
Cargo Area Cover ....................... 212
Cargo Area Features ...................... 208
Cargo Compartment ...................... 208
Light ............................. 164
Cargo Light ............................ 164
Cargo Load Floor ........................ 208
Cargo Tie-Downs ........................ 210 Cellular Phone
....................... 103,301
Certification Label ....................... 406
Changing A Flat Tire ..................... 435
Chart, Tire Sizing ........................ 369
Check Engine Light
(Malfunction Indicator Light) .............226,459
Checking Your Vehicle For Safety ............. 88
Checks, Safety ........................... 88
Child Restraint .................... 78,79,83,85
Child Restraint Tether Anchors .............82,83
Child Safety Locks ........................ 33
Clean Air Gasoline ....................... 400
Cleaning Wheels ............................ 489
Windshield Wiper Blades ............... 469
Climate Control ......................... 301
Clock ........................... 256,275,284
Coin Holder ........................... 207
Cold Weather Operation ................... 320
536 INDEX

Electronic Stability Program (ESP) Indicator . . 366
Engine Temperature Warning............ 231
Exterior ............................ 92
Fog ......................... 161,227,500
Four-Wheel Drive Indicator . . 230,231,233,336,342
Hazard Warning Flasher ............... 434
Headlight Switch ..................... 158
Headlights ...................... 158,499
Headlights On Reminder ............... 161
Headlights On With Wipers ..........160,170
High Beam ...................... 162,227
High Beam Indicator .................. 227
High Beam/Low Beam Select ............ 162
Hill Descent Control Indicator .........230,361
Illuminated Entry ..................... 20
Instrument Cluster ................. 158,224
Lights On Reminder .................. 161
Low Fuel .......................... 224
Malfunction Indicator (Check Engine) ...... 226Oil Pressure
........................ 229
Park .............................. 158
Passing ............................ 162
Rear Servicing ....................... 501
Rear Tail ........................... 501
Seat Belt Reminder ................... 236
Service ......................... 498,499
Service Engine Soon
(Malfunction Indicator) ................ 226
Side Marker ........................ 500
Tire Pressure Monitoring (TPMS) .......224,389
Tow/Haul Indicator .................. 230
Traction Control ..................... 366
Transfer Case ..................... 336,342
Turn Signal .............. 92,158,162,500,501
Vanity Mirror ....................... 102
Voltage ............................ 228
Warning (Instrument Cluster Description) . . . 224
Load Floor, Cargo ....................... 208
544 INDEX