2015 JEEP CHEROKEE check engine light

BRAKE SYSTEM
Your vehicle is equipped with dual hydraulic
brake systems. If either of the two hydraulic
systems loses normal capability, the remaining
system will still function. However, there will
be some loss of overall braking effectiveness. This will be
evident by increased pedal travel during application and
greater pedal force required to slow or stop the vehicle. In
addition, if the malfunction is caused by a leak in the
hydraulic system, the “Brake Warning Light” will turn on
as the brake fluid level drops in the master cylinder.
In the event power assist is lost for any reason (i.e.,
repeated brake applications with the engine OFF) the
brakes will still function. However, the effort required to
brake the vehicle will be much greater than that required
with the power system operating.
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 abnor-
mally high brake temperatures, excessive lining
wear, and possible brake damage. You would not
have your full braking capacity in an emergency.
•Driving a vehicle with the “Brake Warning Light”
on is dangerous. A significant decrease in braking
performance or vehicle stability during braking
may occur. It will take you longer to stop the
vehicle or will make your vehicle harder to control.
You could have a collision. Have the vehicle
checked immediately.
518 STARTING AND OPERATING

NOTE:When shifting the power transfer unit out of
NEUTRAL (N), the engine should remain OFF to avoid
gear clash.
9. Shift the transmission into PARK.
10. Release the brake pedal.
11. Disconnect vehicle from the tow vehicle.
12. Start the engine.
13. Press and hold the brake pedal.
14. Release the parking brake.
15. Shift the transmission into DRIVE, release the brake
pedal, and check that the vehicle operates normally.
NOTE:
•Steps 1 through 5 are requirements that must be met
before pressing the NEUTRAL (N) button, and must
continue to be met until the shift has been completed.
If any of these requirements are not met before press-
ing the NEUTRAL (N) button or are no longer met
during the shift, the NEUTRAL (N) indicator light will
flash continuously until all requirements are met or
until the NEUTRAL (N) button is released.
•The ignition switch must be in the ON/RUN position
for a shift to take place and for the position indicator
lights to be operable. If the ignition switch is not in the
ON/RUN position, the shift will not take place and no
position indicator lights will be on or flashing.
•A flashing NEUTRAL (N) position indicator light
indicates that shift requirements have not been met.
612 STARTING AND OPERATING

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
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
“CHECK GASCAP” message will be displayed in the
Electronic Vehicle Information Center (EVIC) or Driver
Information Display (DID). Refer to “Electronic Vehicle
Information (EVIC) or#Driver Information Display
(DID)” in “Understanding Your Instrument Panel” for
7
MAINTAINING YOUR VEHICLE 657

further information. Tighten the fuel filler cap until a
“clicking” sound is heard. This is an indication that the
fuel filler cap is properly tightened. Refer to “Onboard
Diagnostic System” in “Maintaining Your Vehicle” for
further information.
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.
658 MAINTAINING YOUR VEHICLE

•Check tire pressure and look for unusual wear or
damage. Rotate tires at the first sign of irregular wear,
even if it occurs before the oil indicator system turns
on.
•Check the fluid levels of the coolant reservoir and
brake master cylinder, fill as needed.
•Check function of all interior and exterior lights.
Required Maintenance Intervals.
Refer to the maintenance schedules on the following
page for the required maintenance intervals.
At Every Oil Change Interval As Indicated By Oil
Change Indicator System:
•Change oil and filter
•Rotate the tires.Rotate at the first sign of irregu-
lar wear, even if it occurs before the oil indicator
system turns on.
•Inspect battery and clean and tighten terminals as
required
•Inspect brake pads, shoes, rotors, drums, hoses
and park brake
•Inspect engine cooling system protection and
hoses
•Inspect exhaust system
•Inspect engine air cleaner if using in dusty or
off-road conditions
8
MAINTENANCE
SCHEDULES
MAINTENANCE SCHEDULES 733

Alarm
Arm The System........................19
Alarm, Panic.............................25
Alarm (Security Alarm)......................19
Alarm System (Security Alarm)................19
All Wheel Drive (AWD).....................494
Alterations/Modifications, Vehicle...............8
Antifreeze (Engine Coolant)..................688
Disposal..............................691
Anti-Lock Brake System (ABS)................519
Anti-Lock Warning Light....................333
Appearance Care.........................698
Arming System (Security Alarm)...............19
Assist, Hill Start..........................523
Auto Down Power Windows..................45
Automatic Door Locks......................36
Automatic Headlights......................169
Automatic High Beams.....................170
Automatic Temperature Control (ATC)..........426
Automatic Transaxle.......................481
Automatic Transmission....................484
Adding Fluid..........................696
Fluid and Filter Changes..................696
Fluid Change..........................696
Fluid Level Check.......................694
Fluid Type............................694
Special Additives.......................695
Torque Converter.......................493
Auto Unlock, Doors........................36
Auto Up Power Windows....................45
Auxiliary Electrical Outlet (Power Outlet)........302
Auxiliary Power Outlet.....................302
Axle Fluid..............................730
Axle Lubrication..........................730
Battery.................................669
Keyless Transmitter Replacement (RKE)........26
Belts, Seat...............................11810
INDEX 749

Blind Spot Monitoring......................141
Body Mechanism Lubrication.................675
B-Pillar Location..........................547
Brake Assist System.......................522
Brake Control System, Electronic..............519
Brake Fluid.............................730
Brakes.................................518
Brake System............................518
Anti-Lock (ABS)........................519
Fluid Check...........................693
Master Cylinder........................693
Warning Light.........................331
Brake/Transmission Interlock.................483
Brightness, Interior Lights...................176
Bulb Replacement.........................721
Bulbs, Light.............................120
Camera, Rear............................286
Capacities, Fluid..........................727
Caps, Filler
Fuel.................................588
Oil (Engine)...........................655
Radiator (Coolant Pressure)................690
Carbon Monoxide Warning..................117
Cargo Area Cover.........................318
Cargo Area Features.......................316
Cargo Compartment.......................316
Cargo Load Floor.........................316
Cargo Tie-Downs.........................316
Car Washes.............................699
Cellular Phone...........................425
Certification Label.........................591
Changing A Flat Tire.......................628
Chart, Tire Sizing.........................542
Check Engine Light (Malfunction Indicator Light) . .658
Checking Your Vehicle For Safety..............116
Checks, Safety............................116
Child Restraint............................92
750 INDEX

Enhanced Accident Response Feature............87
Entry System, Illuminated....................22
Ethanol................................580
Event Data Recorder........................91
Exhaust Gas Caution.......................117
Exhaust System...........................117
Exterior Lighting..........................168
Exterior Lights...........................120
Fabric Care..............................702
Filters
Air Cleaner...........................664
Air Conditioning.......................448
Engine Oil............................664
Engine Oil Disposal.....................664
Flashers
Hazard Warning........................615
Turn Signal...........................120
Flash-To-Pass............................174
Flexible Fuel Vehicles
Cruising Range.........................587
Engine Oil............................587
Fuel Requirements......................584
Maintenance...........................588
Replacement Parts.......................588
Starting..............................587
Flooded Engine Starting....................474
Floor Console............................313
Fluid, Brake.............................730
Fluid Capacities..........................727
Fluid Leaks.............................121
Fluid Level Checks
Brake................................693
Engine Oil............................661
Fluids, Lubricants and Genuine Parts...........728
Fog Lights..............................172
Fog Light Service.........................724
Folding Rear Seat.........................159
754 INDEX