fuel cap JEEP WRANGLER 2012 JK / 3.G User Guide

WARNING! (Continued)
•Never add fuel when the engine is running. This is
in violation of most state and federal fire regula-
tions and may cause the MIL to turn on.
•A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on
the ground while filling.
NOTE:
•When the fuel nozzle “clicks” or shuts off, the fuel
tank is full.
•Tighten the gas cap about 1/4 turn until you hear one
click. This is an indication that the cap is properly
tightened.
•If the gas cap is not tightened properly, the MIL will
come on. Be sure the gas cap is tightened every time
the vehicle is refueled.
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 a clicking
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.
466 STARTING AND OPERATING

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.The entire vehicle should first be weighed on a commer-
cial scale to ensure that the GVWR has not been ex-
ceeded. The weight on the front and rear of the vehicle
should then be determined separately to be sure that the
load is properly distributed over front and rear axle.
Weighing the vehicle may show that the GAWR of either
the front or rear axles has been exceeded, but the total
load is within the specified GVWR. If so, weight must be
shifted from front to rear, or rear to front, as appropriate
until the specified weight limitations are met. Store the
heavier items down low and be sure that the weight is
distributed equally. Stow all loose items securely before
driving.
Improper weight distributions can have an adverse affect
on the way your vehicle steers and handles, and the way
the brakes operate.
468 STARTING AND OPERATING

MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment — 3.6L ............. 513
 Onboard Diagnostic System — OBD II ...... 514
▫ Loose Fuel Filler Cap Message ........... 514
 Emissions Inspection And Maintenance
Programs ............................ 515
 Replacement Parts ..................... 516
 Dealer Service ........................ 517
 Maintenance Procedures ................. 517
▫ Engine Oil ......................... 518 ▫
Engine Oil Filter ..................... 520
▫ Engine Air Cleaner Filter ............... 520
▫ Maintenance-Free Battery .............. 521
▫ Air Conditioner Maintenance ............ 522
▫ Body Lubrication .................... 526
▫ Windshield Wiper Blades ............... 526
▫ Adding Washer Fluid ................. 527
▫ Exhaust System ..................... 527
▫ Cooling System ..................... 530
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,
514 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-30 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 519

FLUID CAPACITIES
U.S.Metric
Fuel (Approximate) — Two Door Models 18.6 Gallons70 Liters
Fuel (Approximate) — Four Door Models 22.5 Gallons85 Liters
Engine Oil with Filter
3.6 Liter Engine 6 Quarts5.6 Liters
Cooling System *
3.6 Liter Engine (MOPAR Antifreeze/Engine Coolant
5 Year/100,000 Mile Formula or equivalent) 10.5 Quarts
9.9 Liters
* Includes coolant recovery bottle filled to MAX level.
7
MAINTAINING YOUR VEHICLE 559

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-30 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 RER8ZWYCB4 (Gap 0.043 in [1.1 mm])
Fuel Selection 87 Octane
560 MAINTAINING YOUR VEHICLE

Auxiliary Electrical Outlet (Power Outlet)...... 162
Auxiliary Power Outlet ................... 162
Axle Lock ............................. 395
Battery ............................... 521
Keyless Transmitter Replacement (RKE) ..... 25
Belts, Seat ............................ 46,87
Body Mechanism Lubrication ............... 526
Brake Assist System ...................... 420
Brake Control System, Electronic ............. 419
Brake System ........................... 535
Anti-Lock (ABS) ..................... 417
Master Cylinder ..................... 535
Parking ........................... 414
Warning Light ....................... 271
Brake/Transmission Interlock ............... 382
Break-In Recommendations, New Vehicle ........ 84
Bulb Replacement ..................... 555,556
Bulbs, Light ............................ 89 Calibration, Compass
.................. 286,295
Capacities, Fluid ........................ 559
Caps, Filler Fuel .............................. 465
Power Steering ...................... 413
Car Washes ............................ 542
Carbon Monoxide Warning ...............86,464
Cargo (Vehicle Loading) ................... 466
Cargo Light ............................ 154
Cellular Phone ........................ 99,354
Center High Mounted Stop Light ............ 558
Certification Label ....................... 466
Chains, Tire ............................ 452
Changing A Flat Tire ..................... 493
Chart, Tire Sizing ........................ 434
Check Engine Light
(Malfunction Indicator Light) .............280,515
Checking Your Vehicle For Safety ............. 85
Checks, Safety ........................... 85
10
INDEX 593

FiltersAir Cleaner ......................... 520
Air Conditioning .................. 365,523
Engine Oil ......................... 520
Finish Care ............................ 542
Flashers Hazard Warning ..................... 492
Turn Signal ................. 89,270,557,558
Flooded Engine Starting ................... 373
Fluid Capacities ......................... 559
Fluid Leaks ............................. 89
Fluid Level Checks ...................... 541
Automatic Transmission ................ 537
Engine Oil ......................... 518
Manual Transmission .................. 540
Power Steering ...................... 413
Fluids, Lubricants and Genuine Parts .......... 560
Fog Light Service ........................ 557
Fog Lights .......................... 152,557Fold and Tumble Rear Seat
................. 144
Folding Rear Seat ........................ 146
Folding Windshield ...................... 253
Four Wheel Drive ....................... 390
Shifting ........................... 392
Four Wheel Drive Operation ................ 390
Four-Way Hazard Flasher .................. 492
Freeing A Stuck Vehicle ................... 505
Front Axle (Differential) ................... 541
Fuel ................................. 460
Ethanol ........................... 461
Filler Cap (Gas Cap) .................. 465
Gasoline ........................... 460
Gauge ............................ 269
Materials Added ..................... 462
Methanol .......................... 461
Octane Rating ....................... 460
Requirements ....................... 559
Tank Capacity ....................... 559
10
INDEX 597

Fuel System Caution................... 463,465
Fuses ................................ 549
Gas Cap (Fuel Filler Cap) ............465,466,514
Gasoline (Fuel) ......................... 460
Gasoline, Reformulated ................... 460
Gauges Coolant Temperature .................. 274
Fuel .............................. 269
Odometer .......................... 277
Speedometer ........................ 269
Tachometer ......................... 273
Gear Ranges ........................ 377,384
Gear Select Lever Override ................. 507
General Information ................. 18,130,459
Glass Cleaning .......................... 545
Gross Axle Weight Rating ...............467,470
Gross Vehicle Weight Rating .............467,469
GVWR ............................... 467 Hands-Free Phone (Uconnect™)
.............. 99
HardTop ............................. 176
Hard Top Removal ....................... 184
Hard Top, Modular ...................... 176
Hazard Warning Flasher ................... 492
Head Restraints ......................... 142
Head Rests ............................ 142
Headlights Bulb Replacement .................... 556
Dimmer Switch ...................... 152
Replacing .......................... 556
Switch ............................ 150
Heated Seats ........................... 141
Heater ............................... 354
Heater, Engine Block ..................... 375
High Beam Indicator ..................... 270
Hill Descent Control ..................... 431
Hill Descent Control Indicator ............... 431
Hill Start Assist ......................... 420
598 INDEX