2015 JEEP WRANGLER service indicator

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 driveability.
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 the
gas cap is properly tightened. Press the odometer reset
button to turn the message off. If the problem persists,
584 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 maynotbe 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 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. Cycle the ignition switch to the ON position, but do
not crank or start the engine.
NOTE:If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON
position, you will see the MIL symbol come on as part
of a normal bulb check.
7
MAINTAINING YOUR VEHICLE 585

MAINTENANCE SCHEDULE
Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.
Based on engine operation conditions, the oil change
indicator message will illuminate. This means that service
is required for your vehicle. Operating conditions such as
frequent short-trips, trailer tow, extremely hot or cold
ambient temperatures, and E85 fuel usage will influence
when the “Change Oil” or “Oil Change Required” message
is displayed. Severe Operating Conditions can cause the
change oil message to illuminate as early as 3,500 miles
(5,600 km) since last reset. Have your vehicle serviced as
soon as possible, within the next 500 miles (805 km).
On Electronic Vehicle Information Center (EVIC) equipped
vehicles, “Oil Change Required” will be displayed in the
EVIC and a single chime will sound, indicating that an oil
change is necessary.
On Non-EVIC equipped vehicles, “Change Oil” will flash
in the instrument cluster odometer and a single chime
will sound, indicating that an oil change is necessary.
Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone other
than your authorized dealer, the message can be reset by
referring to the steps described under “Instrument Clus-
ter Descriptions” or “Electronic Vehicle Information Cen-
ter (EVIC)” in “Understanding Your Instrument Panel”
for further information.
NOTE:Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 km) or twelve months,
whichever comes first.
Severe Duty All Models
Change Engine Oil at 4000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment. This
type of vehicle use is considered Severe Duty
8
MAINTENANCE
SCHEDULES
652 MAINTENANCE SCHEDULES

Low Fuel.............................306
Oil Pressure...........................307
Passing..............................170
Rear Servicing.........................644
Rear Tail Lamps........................644
Seat Belt Reminder......................307
Security Alarm.........................312
Service...............................642
Side Marker...........................644
Tire Pressure Monitoring (TPMS)............318
Traction Control........................483
Turn Signal...........................103
Voltage..............................306
Warning (Instrument Cluster Description)......306
Loading Vehicle..........................532
Ti re s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..493
Locking Axle............................446
Locks..................................38
Automatic Door.........................41
Child Protection.........................42
Door.................................38
Power Door............................40
Lubrication, Body.........................601
Lug Nuts...............................561
Maintenance Free Battery....................596
Maintenance Procedures....................587
Maintenance Schedule......................652
Malfunction Indicator Light (Check Engine).......310
Manual, Service..........................668
Manual Transmission......................424
Fluid Level Check.......................623
Lubricant Selection......................623
Shift Speeds...........................426
Master Cylinder (Brakes)....................618
Methanol...............................526
Mini-Trip Computer.......................321
Mirrors.................................111
682 INDEX

Transaxle
Autostick.............................439
Transfer Case............................624
Fluid................................649
Four-Wheel-Drive Operation...............441
Maintenance...........................624
Transmission............................619
Automatic............................431
Fluid................................649
Manual..............................424
Range Indicator........................313
Shifting..............................429
Transmitter Battery Service (Remote Keyless Entry) . .27
Tread Wear Indicators......................507
Trip Computer...........................321
Trip Odometer...........................314
Trip Odometer Reset Button..................313
Turn Signals.............................169
UCI Connector...........................389
Uconnect®
Advanced Phone Connectivity..............133
Phone Call Features.....................125
Phone Features.........................128
Uconnect® 130
Operating Instructions Auxiliary Mode........371
Operating Instructions Radio Mode..........362
Uconnect® 130 With Satellite Radio
Multimedia Satellite Radio.................358
Operating Instructions CD Mode............378
Operating Instructions Radio Mode..........372
Playing MP3 Files.......................380
Uconnect® (Hands-Free Phone)...............115
Uniform Tire Quality Grades.................669
Universal Consumer Interface (UCI) Connector . . . .389
Unleaded Gasoline........................525
Untwisting Procedure, Seat Belt................57
690 INDEX