check engine JEEP WRANGLER 2016 JK / 3.G Owner's Manual

Engine Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine idling, and warm to normal operating tempera-
ture, the level of the engine coolant (antifreeze) in the
bottle should be between the ranges indicated on the
bottle.
The radiator normally remains completely full, so there is
no need to remove the radiator cap unless checking for
engine coolant (antifreeze) freeze point or replacing en-
gine coolant (antifreeze). Advise your service attendant
of this. As long as the engine operating temperature is
satisfactory, the coolant bottle need only be checked once
a month.
When additional engine coolant (antifreeze) is needed to
maintain the proper level, it should be added to the
coolant bottle. Do not overfill.
Points To Remember
NOTE:When the vehicle is stopped after a few miles/
kilometers of operation, you may observe vapor coming
from the front of the engine compartment. This is nor-
mally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized when the thermostat opens, allowing hot engine
coolant (antifreeze) to enter the radiator.
If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
• Do not overfill the coolant expansion bottle.
• Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant (anti-
freeze) needs to be added, the contents of the coolant
expansion bottle must also be protected against freez-
ing.
7
MAINTAINING YOUR VEHICLE 629

Special Additives
The manufacturer strongly recommends against using
any special additives in the transmission.
Automatic Transmission Fluid (ATF) is an engineered
product and its performance may be impaired by supple-
mental additives. Therefore, do not add any fluid addi-
tives to the transmission. The only exception to this
policy is the use of special dyes for diagnosing fluid
leaks. Avoid using transmission sealers as they may
adversely affect seals.
CAUTION!
Do not use chemical flushes in your transmission as
the chemicals can damage your transmission compo-
nents. Such damage is not covered by the New
Vehicle Limited Warranty.
Fluid Level Check
It is best to check the fluid level when the transmission is
at normal operating temperature (approximately 180°F/
82°C). This occurs after at least 15 miles (25 km) of
driving. At normal operating temperature, the fluid
cannot be held comfortably between the fingertips.
Use the following procedure to check the transmission
fluid level properly:
1. Park the vehicle on level ground.
2. Remove the engine cover by pulling it up off themounting studs (two in the front and two in the rear).
3. Run the engine at idle speed and normal operating temperature.
4. Fully apply the parking brake, and press the brake pedal.
7
MAINTAINING YOUR VEHICLE 633

CAUTION!
If the fluid temperature is below 50°F (10°C) it may
not register on the dipstick. Do not add fluid until
the temperature is elevated enough to produce an
accurate reading. Run the engine at idle, in PARK, to
warm the fluid.
8. Reinstall the engine cover and snap it down securely onto the four mounting studs.
9. Check for leaks. Release the parking brake.
NOTE: To prevent dirt and water from entering the
transmission after checking or replenishing fluid, make
sure that the dipstick cap is properly reseated. It is
normal for the dipstick cap to spring back slightly from
its fully seated position, as long as its seal remains
engaged in the dipstick tube.
Fluid And Filter Changes
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
In addition, change the fluid and filter if the fluid
becomes contaminated (with water, etc.), or if the trans-
mission is disassembled for any reason.
Clutch Hydraulic System (Manual Transmission)
— If Equipped
The clutch hydraulic system is fed by a segregated
volume of fluid within the brake system master cylinder
reservoir. In the event of leakage or wear, use only the
manufacturer’s recommended brake fluid. Refer to “Flu-
ids, Lubricants, And Genuine Parts” in “Maintaining
Your Vehicle” for further information.
7
MAINTAINING YOUR VEHICLE 635

NOTE:Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 km), twelve months or
350 hours of engine run time, whichever comes first. The
350 hours of engine run or idle time is generally only a
concern for fleet customers.
Severe Duty All Models
Change Engine Oil at 4,000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment or is
operated predominately at idle or only very low engine
RPM’s. This type of vehicle use is considered Severe
Duty. Once A Month Or Before A Long Trip:
•
Check engine oil level
• Check windshield washer fluid level
• Check the tire inflation pressures and look for unusual
wear or damage
• Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and automatic trans-
mission, and fill as needed
• Check function of all interior and exterior lights
8
MAINTENANCE SCHEDULES 665

Caps, FillerFuel ................................ .539
Power Steering ........................ .477
Radiator (Coolant Pressure) ................628
Carbon Monoxide Warning ...............100, 538
Cargo Light ............................ .174
Car Washes ............................ .639
Cellular Phone ...........................115
Center High Mounted Stop Light ..............658
Certification Label ........................ .541
Chains, Tire ............................ .521
Changing A Flat Tire ...................... .573
Chart, Tire Sizing ........................ .500
Check Engine Light (Malfunction Indicator Light) . .597
Checking Your Vehicle For Safety ...............99
Checks, Safety ............................99
Child Restraint ............................75
Child Restraints Booster Seats ...........................79 Child Restraints
.........................75
Child Seat Installation .....................94
How To Stow An Unused ALR Seat Belt ........90
Infants And Child Restraints ................77
Install A LATCH-Compatible Child Restraint ....89
Installing Child Restraints Using The Vehicle Seat
Belt ..................................91
Locating The LATCH Anchorages ............86
Lower Anchors And Tethers For Children .......82
Older Children And Child Restraints ..........78
Seating Positions ........................81
Child Safety Locks .........................42
Clean Air Gasoline ....................... .535
Cleaning Wheels .............................. .641
Climate Control ......................... .415
Clock .......................... .359, 368, 385
Cold Weather Operation ....................435
Compact Disc (CD) Maintenance ..............412
684 INDEX

Fluid Capacities......................... .659
Fluid Leaks ............................ .104
Fluid Level Checks ....................... .638
Engine Oil ........................... .600
Manual Transmission ....................636
Power Steering ........................ .477
Fluids, Lubricants And Genuine Parts ...........660
Fog Lights .......................... .171, 657
Fog Light Service ........................ .657
Fold And Tumble Rear Seat ..................163
Folding Rear Seat ........................ .165
Folding Windshield ....................... .295
Four-Way Hazard Flasher ...................570
Four Wheel Drive ........................ .453
Operation ............................ .453
Shifting ............................. .453
Systems ............................. .453
Four Wheel Drive Operation .................454
Freeing A Stuck Vehicle .....................585 Front Axle (Differential)
.....................638
Fuel .................................. .534
Adding ............................. .539
Additives ............................ .537
Clean Air ............................ .535
Ethanol ............................. .535
Filler Cap (Gas Cap) .....................539
Gasoline ............................. .534
Gauge .............................. .324
Materials Added ....................... .537
Methanol ............................ .535
Octane Rating ..................... .534, 660
Requirements ...................... .534, 659
Specifications ......................... .660
Tank Capacity ......................... .659
Fueling ............................... .539
Fuses ................................. .647
Gas

Cap (Fuel Filler Cap) .............539, 541, 596
688 INDEX

Leaks, Fluid............................ .104
Life Of Tires ............................ .519
Light Bulbs ......................... .104, 654
Lights ............................. .104, 168
AirBag ........................71, 101, 320
Automatic Headlights ....................169
Back-Up ............................. .658
Brake Assist Warning ....................494
Brake Warning ..................... .318, 480
Bulb Replacement ...................... .656
Cargo .............................. .174
Center Mounted Stop ....................658
Daytime Running ...................... .172
Exterior ............................. .104
Fog............................. .171, 657
Hazard Warning Flasher ..................570
Headlights ........................ .169, 656
Headlight Switch ...................... .169
Hill Descent Control Indicator ..............497Illuminated Entry
........................21
Instrument Cluster ..................... .169
Interior ............................. .173
Lights On Reminder .....................171
Malfunction Indicator (Check Engine) .........326
Passing ............................. .171
Rear Servicing ........................ .658
Rear Tail Lamps ....................... .658
Seat Belt Reminder ..................... .316
Security Alarm ........................ .322
Service .............................. .656
Side Marker .......................... .658
Tire Pressure Monitoring (TPMS) ............328
Traction Control ....................... .494
Turn Signal ..................104, 170, 657, 658
Loading Vehicle ......................... .541
Tires ............................... .505
Locking
Axle........................... .459
Locks ..................................3810
INDEX 691

Automatic Door.........................41
Child Protection .........................42
Door .................................38
Power Door ............................40
Lubrication, Body ........................ .614
Lug Nuts .............................. .571
Maintenance Free Battery ....................609
Maintenance Procedures ....................599
Maintenance Schedule ..................... .664
Malfunction Indicator Light (Check Engine) . . .326, 597
Manual, Service ......................... .678
Manual Transmission ...................438, 636
Fluid Level Check ...................... .636
Lubricant Selection ...................636, 662
Shift Speeds .......................... .439
Master Cylinder (Brakes) ....................631
Methanol .............................. .535
Mini-Trip Computer ....................338, 347 Mirrors
.................................111
Automatic Dimming .....................112
Electric Powered ........................113
Electric Remote .........................113
Heated ...............................114
Outside ..............................112
Rearview .............................111
Vanity ...............................114
Modifications/Alterations, Vehicle ...............9
Modular Hard Top ....................... .206
Monitor, Tire Pressure System ................523
MOPAR Parts ........................ .598, 677
MTBE/ETBE ........................... .535
New Vehicle Break-In Period ..................98
Occupant Restraints ........................47
Octane Rating, Gasoline (Fuel) .............534, 660
Oil Change Indicator ...................... .353
692 INDEX