check engine light JEEP WRANGLER 2017 JK / 3.G User Guide

•Make sure that the coolant expansion bottle overflow
hoses are not kinked or obstructed.
• Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
• Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install ONLY
the correct type thermostat. Other designs may result in
unsatisfactory engine coolant (antifreeze) performance,
poor gas mileage, and increased emissions.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically. Refer
to the “Maintenance Plan” in this section for the proper
maintenance intervals.
WARNING!
Riding the brakes can lead to brake failure and possibly
a collision. Driving with your foot resting or riding on
the brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible brake
damage. You would not have your full braking capacity
in an emergency.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be checked
whenever the vehicle is serviced, or immediately if the brake
system warning light is on. If necessary, add fluid to bring
level to the full mark on the side of the reservoir of the brake
master cylinder. Be sure to clean the top of the master
cylinder area before removing cap. With disc brakes, fluid
level can be expected to fall as the brake pads wear. Brake
fluid level should be checked when pads are replaced. If the
brake fluid is abnormally low, check system for leaks.
Refer to “Fluids And Lubricants” in “Technical Specifica-
tions” for further information.
WARNING!
•Use only manufacturer’s recommended brake fluid.
Refer to “Fluids And Lubricants” in “Technical Speci-
fications” for further information. Using the wrong
type of brake fluid can severely damage your brake
system and/or impair its performance. The proper type
of brake fluid for your vehicle is also identified on the
original factory installed hydraulic master cylinder
reservoir.
(Continued)
400 SERVICING AND MAINTENANCE

About Your Brakes........................ .436
Adding Engine Coolant (Antifreeze) .............397
Adding Fuel ............................. .312
Additives, Fuel ........................... .438
AirBag ................................ .250
Advance Front Air Bag ....................250
Air Bag Operation ....................... .252
Enhanced Accident Response .............256, 368
Event Data Recorder (EDR) .................368
FrontAirBag .......................... .250
If A Deployment Occurs ....................255
Knee Impact Bolsters ..................... .252
Maintaining Your Air Bag System .............257
Transporting Pets ....................... .278
Air Bag Light ......................... .196, 280
Air Bag Maintenance ....................... .257
Air Cleaner, Engine (Engine Air Cleaner Filter) ......381
Air Conditioner Maintenance ..................385
Air Conditioning Filter ....................69, 387
Air Conditioning, Operating Tips ................68
Air Conditioning Refrigerant ...............385, 386
Air Conditioning System .....................385
Air Filter ............................... .381
Air Pressure, Tires ......................... .414
Alarm (Security Alarm) ....................26, 201 Alterations/Modifications, Vehicle
................7
Antenna, Satellite Radio ..................... .465
Antifreeze (Engine Coolant) ................396, 442
Disposal .............................. .398
Anti-Lock Brake System (ABS) .................214
Anti-Lock Warning Light .....................202
Arming System (Security Alarm) ................27
Assistance Towing ......................... .483
Assist, Hill Start .......................... .216
Automatic Dimming Mirror ....................50
Automatic Headlights ........................53
Automatic Oil Change Indicator ................195
Automatic
Transmission ..................295, 405
Adding Fluid .......................... .405
Fluid And Filter Changes ...................405
Fluid Change .......................... .405
Fluid Level Check .....................402, 403
Fluid Type ......................... .402, 445
Special Additives ........................ .403
Autostick ............................... .300
Auxiliary Electrical Outlet (Power Outlet) .........176
Auxiliary Power Outlet ..................... .176
Axle Fluid .............................. .445
Axle Lock ............................... .305
510 INDEX

Battery.............................. .199, 378
Charging System Light ....................199
Keyless Key Fob Replacement ................20
Belts, Seat ............................... .280
Body Mechanism Lubrication ..................389
B-Pillar Location .......................... .409
Brake Assist System ........................ .216
Brake Control System, Electronic ................215
Brake Fluid .......................... .400, 445
Brake System ......................... .400, 436
Anti-Lock (ABS) ........................ .436
Fluid Check ........................... .400
Master Cylinder ........................ .400
Parking .............................. .288
Warning Light .......................... .197
Brake/Transmission Interlock ..................295
Bulb Replacement ...................... .342, 343
Bulbs, Light .......................... .282, 342
Calibration, Compass ....................... .188
Capacities, Fluid .......................... .442
Caps, Filler Fuel ................................. .312
Oil (Engine) ........................... .377
Power Steering ......................... .308Radiator (Coolant Pressure)
.................398
Carbon Monoxide Warning ................279, 441
Cargo Light ...............................56
Car Washes .............................. .428
Cellular Phone ........................ .471, 472
Center High Mounted Stop Light ...............346
Certification Label ......................... .313
Chains, Tire ............................. .423
Changing A Flat Tire .....................353, 405
Check Engine Light (Malfunction Indicator Light) . . . .211
Checking Your Vehicle For Safety ...............279
Checks, Safety ............................ .279
Child

Restraint ........................... .259
Child Restraints Booster Seats ........................... .262
Child Restraints ........................ .259
Child Seat Installation .....................275
How To Stow An Unused ALR Seat Belt ........272
Infants And Child Restraints ................261
LATCH Positions ........................ .266
Locating The LATCH Anchorages .............269
Lower Anchors And Tethers For Children .......265
Older Children And Child Restraints ...........261
Seating Positions ........................ .264
Child Safety Locks ..........................31
12
INDEX 511

FiltersAir Cleaner ............................ .381
Air Conditioning ..................... .69, 387
Engine Oil ......................... .381, 443
Engine Oil Disposal ...................... .381
Flashers Hazard Warning ........................ .342
Turn Signal ..................... .282, 344, 345
Flash-To-Pass ..............................53
Flooded Engine Starting ..................... .286
Fluid, Brake ............................. .445
Fluid Capacities ........................... .442
Fluid Leaks .............................. .282
Fluid Level Checks ........................ .401
Brake ................................ .400
Engine Oil ............................ .378
Manual Transmission ..................... .405
Power Steering ......................... .308
Fluids And Lubricants ...................... .443
Fog Lights ............................ .53, 344
Fog Light Service .......................... .344
Fold And Tumble Rear Seat ....................42
Folding Rear Seat ...........................44
Folding Windshield ........................ .166
Four-Way Hazard Flasher .....................342 Four Wheel Drive
......................... .301
Operation ............................. .301
Shifting .............................. .301
Systems .............................. .301
Four Wheel Drive Operation ..................301
Freeing A Stuck Vehicle ..................... .363
Front Axle (Differential) ..................... .401
Fuel ................................... .438
Adding .............................. .312
Additives ............................. .438
Clean Air ............................. .438
Ethanol .............................. .439
Filler
Cap (Gas Cap) ..................... .312
Gasoline .............................. .438
Gauge ............................... .202
Materials Added ........................ .438
Methanol ............................. .439
Octane Rating ....................... .438, 443
Requirements .......................... .442
Specifications .......................... .443
Tank Capacity .......................... .442
Fueling ................................. .312
Fuses .................................. .346
Gas Cap (Fuel Filler Cap) ..............211,312, 313
514 INDEX

Intermittent Wipers (Delay Wipers)...............58
Introduction ................................4
Inverter, Power ........................... .178
iPod/USB/MP3 Control Bluetooth Streaming Audio .................499
Jacking Instructions ........................ .355
Jack Location ............................ .353
Jack Operation ...................353, 355, 356, 405
Jump Starting ............................ .358
Key Fob Battery Service (Remote Keyless Entry) .....20
Key, Programming ..........................25
Key, Replacement ...........................25
Keys ....................................19
Key, Sentry (Immobilizer) ......................24
Lane Change Assist ..........................54
Lap/Shoulder Belts ........................ .239
Latches ................................. .282
Leaks, Fluid ............................. .282
Life Of Tires ............................. .417
Light Bulbs .......................... .282, 342
Lights .................................. .282
AirBag ............................196, 280 Automatic Headlights
......................53
Back-Up .............................. .345
Brake Assist Warning ..................... .223
Brake Warning ......................... .197
Bulb Replacement ....................... .343
Cargo .................................56
Center Mounted Stop ..................... .346
Cruise ............................... .209
Daytime Running .........................52
Dimmer Switch, Headlight ...................53
Exterior .............................. .282
Fog............................... .53, 344
Hazard Warning Flasher ...................342
Headlights .......................... .52, 343
Headlight Switch .........................52
High Beam ..............................53
High Beam/Low Beam Select .................53
Hill Descent Control Indicator ...............225
Instrument Cluster ........................52
Interior ................................
54
Malfunction Indicator (Check Engine) ..........203
Passing ................................53
Rear Servicing .......................... .345
Rear Tail Lamps ........................ .345
Seat Belt Reminder ...................... .201
516 INDEX

Security Alarm......................... .201
Service ............................... .343
Side Marker ........................... .345
Tire Pressure Monitoring (TPMS) .............204
Traction Control ........................ .223
Turn Signal ....................54, 282, 344, 345
Loading Vehicle ........................... .313
Tires................................. .409
Locking Axle ............................. .305
Locks Child Protection ..........................31
Door ..................................28
Power Door .............................30
Lubrication, Body ......................... .389
Lug Nuts ............................... .436
Maintenance Free Battery .....................378
Maintenance Schedule ...................... .371
Malfunction Indicator Light (Check Engine) . . . .203, 212
Manual, Service ........................... .506
Manual Transmission ....................290, 405
Fluid Level Check ....................... .405
Lubricant Selection ....................405, 445
Shift Speeds ........................... .291
Methanol ............................... .439Mirrors
..................................49
Automatic Dimming .......................50
Electric Powered ..........................51
Electric Remote ...........................51
Heated .................................51
Outside ................................50
Rearview ...............................49
Vanity .................................52
Modifications/Alterations, Vehicle ................7
Modular Hard Top ..........................83
Monitor, Tire Pressure System ..................227
MOPAR Parts ............................ .505
New Vehicle Break-In Period ..................288
Occupant Restraints ........................ .236
Octane Rating, Gasoline (Fuel) ..............438, 443
Oil Change Indicator ....................... .195
Oil

Change Indicator, Reset ...................195
Oil, Engine ........................... .380, 443
Capacity .............................. .442
Change Interval ..................... .195, 380
Dipstick .............................. .378
Disposal .............................. .381
Filter ............................. .381, 443
12
INDEX 517