2011 JEEP WRANGLER engine

WARNING!
•Chains are not recommended for freeing a stuck
vehicle. Chains may break, causing serious injury
or death.
•Stand clear of vehicles when pulling with tow
hooks. Tow straps may become disengaged, caus-
ing serious injury.
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle. Tow straps are recommended
when towing the vehicle, chains may cause vehicle
damage.
SHIFT LEVER OVERRIDE
If a malfunction occurs and the shift lever cannot be
moved out of the PARK position, you can use the
following procedure to temporarily move the shift lever:
1. Firmly set the parking brake.
2. Turn the ignition to the ON/RUN position without
starting the engine.
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WHAT TO DO IN EMERGENCIES 497

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
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▫Brake System ....................... 525
▫ Automatic Transmission – If Equipped ..... 527
▫ Hydraulic Clutch Fluid – Manual
Transmission ....................... 530
▫ Manual Transmission – If Equipped ....... 530
▫ Transfer Case ....................... 531
▫ Front/Rear Axle Fluid ................. 531
▫ Appearance Care And Protection From
Corrosion .......................... 532
 Fuses .............................. 539
▫ Totally Integrated Power Module ......... 539
 Vehicle Storage ....................... 545
 Replacement Bulbs .................... 545 
Bulb Replacement ..................... 546
▫ Headlamp ......................... 546
▫ Front Park/Turn Signal ................ 547
▫ Front Side Marker .................... 547
▫ Front Fog Lamp ..................... 547
▫ Rear Tail, Stop, Turn Signal, And Backup
Lamp ............................. 548
▫ Center High-Mounted Stop Lamp
(CHMSL) .......................... 549
 Fluid Capacities ...................... 549
 Fluids, Lubricants And Genuine Parts ....... 550
▫ Engine ............................ 550
▫ Chassis ........................... 551
504 MAINTAINING YOUR VEHICLE

ENGINE COMPARTMENT — 3.8L
1 — Integrated Power Module (Fuses)7 — Engine Coolant Reservoir
2 — Battery 8 — Engine Oil Fill
3 — Automatic Transmission Dipstick 9 — Air Cleaner Filter
4 — Engine Oil Dipstick 10 — Coolant Pressure Cap
5 — Brake Fluid Reservoir 11 — Power Steering Fluid Reservoir
6 — Washer Fluid Reservoir
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MAINTAINING YOUR VEHICLE 505

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

the message will appear the next time the vehicle is
started. This might indicate a damaged cap. If the prob-
lem is detected twice in a row, the system will turn on the
MIL. Resolving the problem will turn the MIL off.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass
an inspection of your vehicle’s emissions control system.
Failure to pass could prevent vehicle registration.For states that require an Inspection and Mainte-
nance (I/M), this check verifies the “Malfunction
Indicator Light (MIL)” is functioning and is not
on when the engine is running, and that the OBD II
system is ready for testing. Normally, the OBD II system will be ready. The OBD II
system may
notbe ready if your vehicle was recently
serviced, recently had a dead battery or a battery replace-
ment. If the OBD II system should be determined not
ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition key-actuated test,
which you can use prior to going to the test station. To
check if your vehicle’s OBD II system is ready, you must
do the following:
1. Turn the ignition switch to the ON position, but do not
crank or start the engine.
2. If you crank or start the engine, you will have to start
this test over.
3. As soon as you turn the ignition switch to the ON
position, you will see the MIL symbol come on as part of
a normal bulb check.
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MAINTAINING YOUR VEHICLE 507

4. Approximately 15 seconds later, one of two things will
happen:a. The MIL will flash for about 10 seconds and then
return to being fully illuminated until you turn OFF
the ignition or start the engine. This means that your
vehicle’s OBD II system is not readyand you should
not proceed to the I/M station.
b. The MIL will not flash at all and will remain fully
illuminated until you turn OFF the ignition or start the
engine. This means that your vehicle’s OBD II system
is ready and you can proceed to the I/M station.
If your OBD II system is not ready,you should see your
authorized dealer or repair facility. If your vehicle was
recently serviced or had a battery failure or replacement,
you may need to do nothing more than drive your
vehicle as you normally would in order for your OBD II
system to update. A recheck with the above test routine
may then indicate that the system is now ready. Regardless of whether your vehicle’s OBD II system is
ready or not, if the MIL is illuminated during normal
vehicle operation you should have your vehicle serviced
before going to the I/M station. The I/M station can fail
your vehicle because the MIL is on with the engine
running.
REPLACEMENT PARTS
Use of genuine MOPAR
parts for normal/scheduled
maintenance and repairs is highly recommended to en-
sure the designed performance. Damage or failures
caused by the use of non-MOPAR parts for maintenance
and repairs will not be covered by the manufacturer’s
warranty.
508 MAINTAINING YOUR VEHICLE

DEALER SERVICE
Your authorized dealer has the qualified service person-
nel, special tools, and equipment to perform all service
operations in an expert manner. Service Manuals are
available which include detailed service information for
your vehicle. Refer to these Service Manuals before
attempting any procedure yourself.
NOTE:Intentional tampering with emissions control
systems may void your warranty and could result in civil
penalties being assessed against you.
WARNING!
You can be badly injured working on or around a
motor vehicle. Only do service work for which you
have the knowledge and the proper equipment. If
you have any doubt about your ability to perform a
service job, take your vehicle to a competent me-
chanic.
MAINTENANCE PROCEDURES
The pages that follow contain the requiredmaintenance
services determined by the engineers who designed your
vehicle.
Besides those maintenance items specified in the fixed
maintenance schedule, there are other components which
may require servicing or replacement in the future.
CAUTION!
•Failure to properly maintain your vehicle or per-
form repairs and service when necessary could
result in more costly repairs, damage to other
components or negatively impact vehicle perfor-
mance. Immediately have potential malfunctions
examined by an authorized Chrysler Group LLC
dealership or qualified repair center.
(Continued)
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MAINTAINING YOUR VEHICLE 509