fuel JEEP WRANGLER UNLIMITED 2013 Service Manual

Electronic Speed Control – If Equipped
• Do not use in hilly terrain or with heavy loads.
• When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
• Use speed control in flat terrain and with light loads to
maximize fuel efficiency. Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
City Driving
When stopped for short periods of time, shift the trans-
mission into NEUTRAL and increase engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
5 STARTING AND OPERATING 531

3. Connect the negative end (-) of the jumper cable to the
negative (-) post of the booster battery.
4. Connect the opposite end of the negative (-) jumper
cable to a good engine ground (exposed metal part of
the discharged vehicle’s engine) away from the battery
and the fuel injection system.
WARNING!Do not connect the cable to the negative post (-) of the
discharged battery. The resulting electrical spark
could cause the battery to explode and could result in
personal injury.
5. Start the engine in the vehicle that has the booster
battery, let the engine idle a few minutes, and then start
the engine in the vehicle with the discharged battery. Once the engine is started, remove the jumper cables in
the reverse sequence:
6. Disconnect the negative (-) jumper cable from the
engine ground of the vehicle with the discharged
battery.
7. Disconnect the negative end (-) of the jumper cable
from the negative (-) post of the booster battery.
8. Disconnect the opposite end of the positive (+) jumper
cable from the positive (+) post of the booster battery.
9. Disconnect the positive (+) end of the jumper cable
from the positive (+) post of the discharged vehicle.
If frequent jump-starting is required to start your vehicle
you should have the battery and charging system in-
spected at your authorized dealer.
6 WHAT TO DO IN EMERGENCIES 551

MAINTAINING YOUR VEHICLECONTENTS  ENGINE COMPARTMENT — 3.6L ......... .561
 ONBOARD DIAGNOSTIC SYSTEM — OBD II . .562
▫ Loose Fuel Filler Cap Message ........... .562
 EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS ......................... .563
 REPLACEMENT PARTS ................. .564
 DEALER SERVICE ..................... .564
 MAINTENANCE PROCEDURES .......... .565
▫ Engine Oil ......................... .566
▫ Engine Oil Filter ..................... .569 ▫ Engine Air Cleaner Filter ............... .569
▫ Maintenance-Free Battery .............. .570
▫ Air Conditioner Maintenance ............ .571
▫ Body Lubrication .................... .572
▫ Windshield Wiper Blades .............. .573
▫ Adding Washer Fluid ................. .574
▫ Exhaust System ..................... .574
▫ Cooling System ..................... .577
▫ Brake System ....................... .583
▫ Automatic Transmission – If Equipped ..... .585
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
 clicking  sound is heard. This is an indication that the562 MAINTAINING YOUR VEHICLE

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 – 3.6L Engine
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 vehicle. For information on engine oil
filler cap location, refer to “Engine Compartment” in “Main-
taining Your Vehicle” for further information.
Lubricants, which do not have both the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber, should not be used. Synthetic Engine Oils
You may use synthetic engine oils provided the recom-
mended oil quality requirements are met, and the recom-
mended maintenance intervals for oil and filter changes
are followed.
Materials Added To Engine Oil
The manufacturer strongly recommends against the ad-
dition of any additives (other than leak detection dyes) to
the engine oil. Engine oil is an engineered product and its
performance may be impaired by supplemental addi-
tives.
Disposing Of Used Engine Oil And Oil Filters
Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the
environment. Contact your authorized dealer, service568 MAINTAINING YOUR VEHICLE

into the passenger compartment. In addition, have the
exhaust system inspected each time the vehicle is raised
for lubrication or oil change. Replace as required.
WARNING!• Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you unconscious
and can eventually poison you. To avoid breathing
CO, refer to “Safety Tips/Exhaust Gas” in “Things
To Know Before Starting Your Vehicle” for further
information.
• A hot exhaust system can start a fire if you park
over materials that can burn. Such materials might
be grass or leaves coming into contact with your
exhaust system. Do not park or operate your ve-
hicle in areas where your exhaust system can con-
tact anything that can burn. CAUTION!• The catalytic converter requires the use of un-
leaded fuel only. Leaded gasoline will destroy the
effectiveness of the catalyst as an emissions control
device and may seriously reduce engine perfor-
mance and cause serious damage to the engine.
• Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition.
In the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
7 MAINTAINING YOUR VEHICLE 575

Cavity Car-
tridge
Fuse Mini
Fuse Description
J1 — —
J2 30 Amp
Pink Transfer Case
Module
J3 — —
J4 25 Amp
Natural Driver Door Node
J5 25 Amp
Natural Passenger Door
Node
J6 40 Amp
Green Anti-Lock Brake
System (ABS)
Pump/Stability
Control System Cavity Car-
tridge
Fuse Mini
Fuse Description
J7 30 Amp
Pink Anti-Lock Brake
System (ABS)
Valve/Stability
Control System
J8 — —
J9 40 Amp
Green PZEV Sec Motor/
Flex Fuel
J10 30 Amp
Pink Headlamp Wash
Relay/Manifold
Tuning Valve
J11 30 Amp
Pink Sway Bar
J12 30 Amp
Pink Rear Blower Motor/
Radiator Fan
7 MAINTAINING YOUR VEHICLE 599

Cavity Car-
tridge
Fuse Mini
Fuse Description
M18 15 Amp
Blue Right Tail/Park/
Run Lamp
M19 25 Amp
Natural Auto Shut Down
(ASD #1 and #2)
M20 15 Amp
Blue Cabin Compartment
Node Interior Light,
Switch Bank
M21 20 Amp
Yellow Auto Shut Down
(ASD #3)
M22 10 Amp
Red Right Horn
(HI/LOW)
M23 10 Amp
Red Left Horn
(HI/LOW) Cavity Car-
tridge
Fuse Mini
Fuse Description
M24 25 Amp
Natural Rear Wiper
M25 20 Amp
Yellow Fuel Pump, Diesel
Lift Pump –
Export Only
M26 10 Amp
Red Power Window
Switch, Driver
Window Switch
M27 10 Amp
Red Ignition Switch
Feed, Wireless
Module
M28 10 Amp
Red Powertrain Control
Module
7 MAINTAINING YOUR VEHICLE 603

Cavity Car-
tridge
Fuse Mini
Fuse Description
M29 10 Amp
Red Powertrain
M30 15 Amp
Blue Wiper Motor Frt,
J1962 Diagnostic Feed
M31 20 Amp
Yellow Backup Lamps
M32 10 Amp
Red Airbag Controller,
TT EUROPE
M33 10 Amp
Red Powertrain
Controller
M34 10 Amp
Red Park Assist, Climate
Control System,
Headlamp Wash,
Compass Cavity Car-
tridge
Fuse Mini
Fuse Description
M35 10 Amp
Red Heated Mirrors
M36 20 Amp
Yellow Power Outlet
M37 10 Amp
Red Anti-Lock Brake
System, Electronic
Stability Control,
Stop Lamp Switch,
Fuel Pump Relay
M38 25 Amp
Natural Lock/Unlock
Motors604 MAINTAINING YOUR VEHICLE

FLUID CAPACITIES
U.S. Metric
Fuel (Approximate) — Two Door Models 18.6 Gallons 70 Liters
Fuel (Approximate) — Four Door Models 22.5 Gallons 85 Liters
Engine Oil with Filter
3.6L Engine 6 Quarts 5.6 Liters
Cooling System *
3.6L Engine (MOPAR  Antifreeze/Engine Coolant
10 Year/152,000 Mile Formula or equivalent) 10.5 Quarts 9.9 Liters
* Includes coolant recovery bottle filled to MAX level. 610 MAINTAINING YOUR VEHICLE