engine JEEP GRAND CHEROKEE 2012 WK2 / 4.G Owners Manual

9. Disconnect the positive(+)end of the jumper cable
from the remote positive (+)post of the discharged
vehicle.
10. Reinstall the protective cover over the remote posi-
tive (+)battery 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.
CAUTION!
Accessories that can be plugged into the vehicle
power outlets draw power from the vehicle’s battery,
even when not in use (i.e., cellular phones, etc.).
Eventually, if plugged in long enough, the vehicle’s
battery will discharge sufficiently to degrade battery
life and/or prevent the engine from starting.
FREEING A STUCK VEHICLE
If the vehicle becomes stuck in snow, sand or mud, it can
often be moved by a rocking motion. Move the shift lever
rhythmically between DRIVE and REVERSE while ap-
plying slight pressure to the accelerator. In general, the
least amount of accelerator pedal pressure to maintain
the rocking motion without spinning the wheels or racing
the engine is most effective.
CAUTION!
Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the en-
gine to idle with the shift lever in NEUTRAL for at
least one minute after every five rocking-motion
cycles. This will minimize overheating and reduce
the risk of transmission failure during prolonged
efforts to free a stuck vehicle.6
WHAT TO DO IN EMERGENCIES 563

CAUTION!
•When “rocking” a stuck vehicle by moving be-
tween DRIVE and REVERSE, do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
•Revving the engine or spinning the wheels too fast
may lead to transmission overheating and failure.
It can also damage the tires. Do not spin the
wheels above 30 mph (48 km/h) while in gear (no
transmission shifting occurring).
WARNING!
Fast spinning tires can be dangerous. Forces gener-
ated by excessive wheel speeds may cause damage, or
even failure, of the axle and tires. A tire could
explode and injure someone. Do not spin your vehi-
cle’s wheels faster than 30 mph (48 km/h) or for
longer than 30 seconds continuously without stop-
ping when you are stuck and do not let anyone near
a spinning wheel, no matter what the speed.
EMERGENCY TOW HOOKS — IF EQUIPPED
If your vehicle is equipped with tow hooks, there will be
one in the rear and two mounted on the front of the
vehicle. The rear hook will be located on the driver’s side
of the vehicle.
NOTE:For off-road recovery, it is recommended to use
both of the front tow hooks to minimize the risk of
damage to the vehicle.
564 WHAT TO DO IN EMERGENCIES

WARNING!
•Chains are not recommended for freeing a stuck
vehicle. Chains may break, causing serious injury
or death.
•Stand clear of vehicles when pulling with tow
hooks. Tow straps may become disengaged, caus-
ing serious injury.
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle.
SHIFT LEVER OVERRIDE
If a malfunction occurs and the shift lever cannot be
moved out of the PARK position, you can use the
following procedure to temporarily move the shift lever:
1. Firmly apply the parking brake.
2. Turn the engine OFF.
3. Remove the rubber liner from the cupholder (located
next to the shifter on the center console).
6
WHAT TO DO IN EMERGENCIES 565

4. Using a screwdriver or similar tool, carefully remove
the shift lever override access cover, located on the
bottom of the cupholder.
5. Press and maintain firm pressure on the brake pedal.
6. Using the screwdriver or similar tool, press and hold
the shift lock lever down.
7. Move the shift lever to the NEUTRAL position.8. The vehicle may then be started in NEUTRAL.
9. Reinstall the shift lever override access cover and
install the rubber liner into the cupholder.
TOWING A DISABLED VEHICLE
This section describes procedures for towing a disabled
vehicle using a commercial wrecker service. If the trans-
mission and drivetrain are operable, disabled vehicles
may also be towed as described under “Recreational
Towing” in the “Starting and Operating” section.
NOTE:
Vehicles equipped with Quadra-Lift™ must be
lowered to the Park (lowest) level, and have automatic
leveling disabled, before tying them down (from the
body) on a trailer or flatbed truck. Refer to the section on
Quadra-Lift™ for more information. If the vehicle cannot
be lowered to the Park level (for example, engine will not
run), tie-downs must be fastened to the axles (not to the
body). Failure to follow these instructions may cause fault
codes to be set and/or loss of proper tie-down tension.
Shift Lever Override Access Cover
566 WHAT TO DO IN EMERGENCIES

MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment — 3.6L ............. 573
 Engine Compartment — 5.7L ............. 574
 Onboard Diagnostic System – OBD II ....... 575
▫ Loose Fuel Filler Cap Message ........... 575
 Emissions Inspection And Maintenance
Programs ............................ 576
 Replacement Parts ..................... 577
 Dealer Service ........................ 578
 Maintenance Procedures ................. 578
▫ Engine Oil ......................... 579 ▫
Engine Oil Filter ..................... 582
▫ Engine Air Cleaner Filter ............... 582
▫ Maintenance-Free Battery .............. 583
▫ Air Conditioner Maintenance ............ 585
▫ Body Lubrication .................... 586
▫ Windshield Wiper Blades ............... 586
▫ Adding Washer Fluid ................. 588
▫ Exhaust System ..................... 589
▫ Cooling System ..................... 592
7

▫Brake System ....................... 597
▫ Front/Rear Axle Fluid ................. 599
▫ Transfer Case ....................... 600
▫ Automatic Transmission ............... 601
▫ Appearance Care And Protection From
Corrosion .......................... 604
 Fuses .............................. 610
▫ Totally Integrated Power Module ......... 610
 Vehicle Storage ....................... 616
 Replacement Bulbs .................... 616
 Bulb Replacement ..................... 617
▫ High Intensity Discharge Headlamps (HID) –
If Equipped ........................ 617 ▫
Halogen Headlamps – If Equipped ........ 618
▫ Front Turn Signal .................... 618
▫ Front Fog Lamps .................... 619
▫ Rear Tail, Stop, Turn Signal, And Backup
Lamps ............................ 620
▫ Rear Liftgate Mounted Tail Lamp ......... 620
▫ Center High-Mounted Stop Lamp
(CHMSL) .......................... 621
▫ Rear License Lamp ................... 622
 Fluid Capacities ...................... 622
 Fluids, Lubricants, And Genuine Parts ....... 623
▫ Engine ............................ 623
▫ Chassis ........................... 624
572 MAINTAINING YOUR VEHICLE

ENGINE COMPARTMENT — 3.6L
1 — Totally Integrated Power Module (Fuses)6 — Air Cleaner Filter
2 — Engine Oil Dipstick 7 — Washer Fluid Reservoir
3 — Engine Oil Fill 8 — Coolant Pressure Cap (Radiator)
4 — Brake Fluid Reservoir 9 — Engine Coolant Reservoir
5 — Power Steering Fluid Reservoir
7
MAINTAINING YOUR VEHICLE 573

ENGINE COMPARTMENT — 5.7L
1 — Totally Integrated Power Module (Fuses)6 — Washer Fluid Reservoir
2 — Automatic Transmission Dipstick 7 — Engine Oil Dipstick
3 — Engine Oil Fill 8 — Coolant Pressure Cap (Radiator)
4 — Brake Fluid Reservoir 9 — Engine Coolant Reservoir
5 — Air Cleaner Filter
574 MAINTAINING YOUR VEHICLE

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
If the vehicle diagnostic system determines
that the fuel filler cap is loose, improperly
installed, or damaged, a loose gascap indicator
will display in the EVIC telltale display area.
Refer to “Electronic Vehicle Information Center (EVIC)”
in “Understanding Your Instrument Panel” for further
information. Tighten the fuel filler cap properly and press
7
MAINTAINING YOUR VEHICLE 575

the SELECT button to turn off the message. If the
problem continues, the message will appear the next time
the vehicle is started.
A loose, improperly installed, or damaged fuel filler cap
may also turn on the Malfunction Indicator Light (MIL).
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 may
notbe 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 key-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. Turn the ignition switch to the ON position, but do not
crank or start the engine.
2. If you crank or start the engine, you will have to start
this test over.
3. As soon as you turn the ignition switch to the ON
position, you will see the MIL symbol come on as part of
a normal bulb check.
576 MAINTAINING YOUR VEHICLE