fuel cap JEEP WRANGLER 2011 JK / 3.G User Guide

Loose Fuel Filler Cap Message
After fuel has been added, the vehicle diagnostic system
can determine if the fuel filler cap is possibly loose,
improperly installed, or damaged. If the system detects a
malfunction, the “gASCAP” message will display in the
odometer display. Tighten the gas cap until aclicking
sound is heard. This is an indication that the gas cap is
properly tightened. Press the odometer reset button to
turn the message off. If the problem persists, the message
will appear the next time the vehicle is started. This
might indicate a damaged cap. If the problem is detected
twice in a row, the system will turn on the MIL. Resolving
the problem will turn the MIL off.
VEHICLE LOADING
Certification Label
As required by National Highway Traffic Safety Admin-
istration regulations, your vehicle has a certification label
affixed to the driver’s side door or B-Pillar. This label contains the month and year of manufacture,
Gross Vehicle Weight Rating (GVWR), Gross Axle Weight
Rating (GAWR) front and rear, and Vehicle Identification
Number (VIN). A Month-Day-Hour (MDH) number is
included on this label and indicates the month, day, and
hour of manufacture. The bar code that appears on the
bottom of the label is your VIN.
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.5
STARTING AND OPERATING 459

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
capacity conditions, and with no occupants or cargo
loaded into the vehicle. The front and rear curb weight
values are determined by weighing your vehicle on a
commercial scale before any occupants or cargo are
added.
Loading
The actual total weight and the weight of the front and
rear of your vehicle at the ground can best be determined
by weighing it when it is loaded and ready for operation.
460 STARTING AND OPERATING

MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment — 3.8L ............. 505
 Onboard Diagnostic System — OBD II ...... 506
▫ Loose Fuel Filler Cap Message ........... 506
 Emissions Inspection And Maintenance
Programs ............................ 507
 Replacement Parts ..................... 508
 Dealer Service ........................ 509
 Maintenance Procedures ................. 509
▫ Engine Oil ......................... 510 ▫
Engine Oil Filter ..................... 512
▫ Engine Air Cleaner Filter ............... 512
▫ Maintenance-Free Battery .............. 513
▫ Air Conditioner Maintenance ............ 514
▫ Body Lubrication .................... 515
▫ Windshield Wiper Blades ............... 516
▫ Adding Washer Fluid ................. 516
▫ Exhaust System ..................... 517
▫ Cooling System ..................... 520
7

ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated onboard
diagnostic system called OBD II. This system monitors
the performance of the emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the “Malfunction Indicator Light” (MIL). It
will also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your authorized dealer for service as
soon as possible.CAUTION!
•Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and drivability. The
vehicle must be serviced before any emissions
tests can be performed.
•If the MIL is flashing while the engine is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is possibly loose, improp-
erly installed, or damaged. A “gASCAP” message will be
displayed in the odometer. Tighten the gas cap until a
clickingsound is heard. This is an indication that the
gas cap is properly tightened. Press the odometer reset
button to turn the message off. If the problem persists,
506 MAINTAINING YOUR VEHICLE

Engine Oil Selection
For best performance and maximum protection for all
engines under all types of operating conditions, the
manufacturer recommends engine oils that are API Cer-
tified and meet the requirements of Chrysler Material
Standard MS-6395.
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends
API Certified engine oils.
CAUTION!
Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is
not covered by the New Vehicle Limited Warranty.
Engine Oil Viscosity (SAE Grade)
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy.
The engine oil filler cap also shows the recommended
engine oil viscosity for your engine. For information on
engine oil filler cap location, refer to “Engine Compart-
ment” in “Maintaining Your Vehicle” for further informa-
tion.
Lubricants which do not have both, the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber, should not be used.
7
MAINTAINING YOUR VEHICLE 511

Center High-Mounted Stop Lamp (CHMSL)
The stop lamp is mounted on a bracket that extends
upward from the tailgate behind the spare tire. If service
is needed, obtain the LED/Cover Assembly from your
local authorized dealer.
1. Remove the spare tire.2. Remove the four screws holding the lens/cover in
place on the spare tire carrier.
3. Disconnect the wire harness from the back of the LED
cover.
FLUID CAPACITIES
U.S.
Metric
Fuel (Approximate) — Two Door Models 18.5 Gallons70 Liters
Fuel (Approximate) — Four Door Models 22.5 Gallons85 Liters
Engine Oil with Filter
3.8 Liter Engine 6 Quarts5.7 Liters
Cooling System *
3.8 Liter Engine (MOPAR Antifreeze/Engine Coolant 5
Year/100,000 Mile Formula or equivalent) 13 Quarts
12 Liters
* Includes coolant recovery bottle filled to MAX level.
7
MAINTAINING YOUR VEHICLE 549

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid
Organic Additive Technology) or equivalent.
Engine Oil Use API Certified SAE 5W-20 Engine Oil, meeting the requirements of
Chrysler Material Standard MS-6395. Refer to your engine oil filler cap for
correct SAE grade.
Engine Oil Filter MOPAREngine Oil Filter or equivalent.
Spark Plugs RE14PLP5 (Gap 0.050 in [1.27 mm])
Fuel Selection 87 Octane
550 MAINTAINING YOUR VEHICLE

Special Additives..................... 528
Torque Converter .................... 383
Auxiliary Electrical Outlet (Power Outlet) ...... 162
Auxiliary Power Outlet ................... 162
Axle Lock ............................. 388
Battery ............................... 513
Keyless Transmitter Replacement (RKE) ..... 25
Belts, Seat ............................ 47,87
Body Mechanism Lubrication ............... 515
Brake Assist System ...................... 411
Brake Control System, Electronic ............. 410
Brake System ........................... 525
Anti-Lock (ABS) ..................... 409
Master Cylinder ..................... 526
Parking ........................... 406
Warning Light ....................... 268
Brake/Transmission Interlock ............... 378
Break-In Recommendations, New Vehicle ........ 85Bulb Replacement
..................... 545,546
Bulbs, Light ............................ 89
Calibration, Compass .................. 285,293
Capacities, Fluid ........................ 549
Caps, Filler Fuel .............................. 457
Power Steering ...................... 406
Car Washes ............................ 533
Carbon Monoxide Warning ...............86,456
Cargo (Vehicle Loading) ................... 459
Cargo Light ............................ 154
Cellular Phone ........................ 99,351
Center High Mounted Stop Light ............ 549
Certification Label ....................... 459
Chains, Tire ............................ 445
Changing A Flat Tire ..................... 485
Chart, Tire Sizing ........................ 427
10
INDEX 583

Fabric Care......................... 535,536
Fabric Top ............................. 536
Filters Air Cleaner ......................... 512
Air Conditioning ..................... 362
Engine Oil ......................... 512
Finish Care ............................ 533
Flashers Hazard Warning ..................... 484
Turn Signal ................. 89,267,547,548
Flooded Engine Starting ................... 371
Fluid Capacities ......................... 549
Fluid Leaks ............................. 89
Fluid Level Checks ...................... 532
Automatic Transmission ................ 527
Engine Oil ......................... 510
Manual Transmission .................. 530
Power Steering ...................... 406
Fluids, Lubricants and Genuine Parts .......... 550Fog Light Service
........................ 547
Fog Lights .......................... 152,547
Fold and Tumble Rear Seat ................. 144
Folding Rear Seat ........................ 146
Folding Windshield ...................... 253
Four Wheel Drive ....................... 383
Shifting ........................... 385
Four Wheel Drive Operation ................ 383
Four-Way Hazard Flasher .................. 484
Freeing A Stuck Vehicle ................... 495
Front Axle (Differential) ................... 531
Fuel ................................. 452
Ethanol ........................... 453
Filler Cap (Gas Cap) .................. 457
Gasoline ........................... 452
Gauge ............................ 266
Materials Added ..................... 455
Methanol .......................... 453
Octane Rating ....................... 452
10
INDEX 587

Requirements....................... 549
Tank Capacity ....................... 549
Fuel System Caution ................... 455,458
Fuses ................................ 539
Gas Cap (Fuel Filler Cap) ............457,459,506
Gasoline (Fuel) ......................... 452
Gasoline, Reformulated ................... 453
Gauges Coolant Temperature .................. 271
Fuel .............................. 266
Odometer .......................... 274
Speedometer ........................ 266
Tachometer ......................... 270
Gear Ranges ........................ 375,379
Gear Select Lever Override ................. 497
General Information ................. 18,130,452
Glass Cleaning .......................... 535
Gross Axle Weight Rating ...............460,462Gross Vehicle Weight Rating
.............459,462
GVWR ............................... 459
Hands-Free Phone (Uconnect™) .............. 99
HardTop ............................. 176
Hard Top Removal ....................... 184
Hard Top, Modular ...................... 176
Hazard Warning Flasher ................... 484
Head Restraints ......................... 142
Head Rests ............................ 142
Headlights Bulb Replacement .................... 546
Dimmer Switch ...................... 152
Replacing .......................... 546
Switch ............................ 150
Heated Seats ........................... 141
Heater ............................... 351
Heater, Engine Block ..................... 373
High Beam Indicator ..................... 267
588 INDEX