service indicator JEEP GRAND CHEROKEE 2012 Owner handbook (in English)

If the transmission operating temperature ex-
ceeds normal operating limits, the powertrain
controller will modify the transmission shift
schedule and expand the range of torque con-
verter clutch engagement. This is done to pre-
vent transmission damage due to overheating.
If the transmission becomes extremely hot, the
“Transmission Temperature Warning Light” may
illuminate and the transmission may downshift
out of Overdrive until the transmission cools
down.
NOTE:
Use caution when operating a heavily
loaded vehicle at low speeds (such as tow-
ing a trailer up a steep grade, or in stop-
and-go traffic) during hot weather. In these
conditions, torque converter slip can im-
pose a significant additional heat load on
the cooling system. Downshifting the trans-
mission to the lowest possible gear (when
climbing a grade), or shifting to NEUTRAL
(when stopped in heavy traffic) can help to
reduce this excess heat generation.
During cold temperatures, transmission opera-
tion may be modified depending on engine andtransmission temperature as well as vehicle
speed. This feature improves warm up time of
the engine and transmission to achieve maxi-
mum efficiency. Engagement of both the torque
converter clutch and the top overdrive gear are
inhibited until the transmission fluid is warm
(refer to the “Note” under “Torque Converter
Clutch” in this section). During extremely cold
temperatures (-16°F [-27°C] or below), opera-
tion may briefly be limited to first and direct
gears only. Normal operation will resume once
the transmission temperature has risen to a
suitable level.
Transmission Limp Home Mode
Transmission function is monitored electroni-
cally for abnormal conditions. If a condition is
detected that could result in transmission dam-
age, Transmission Limp Home Mode is acti-
vated. In this mode, the transmission remains in
direct gear regardless of which forward gear is
selected. PARK, REVERSE, and NEUTRAL will
continue to operate. The Malfunction Indicator
Light (MIL) may be illuminated. Limp Home
Mode allows the vehicle to be driven to an
authorized dealer for service without damaging
the transmission.
In the event of a momentary problem, the
transmission can be reset to regain all forward
gears by performing the following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition switch to the LOCK/OFF
position.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the
problem is no longer detected, the transmis-
sion will return to normal operation.
NOTE:
Even if the transmission can be reset, we
recommend that you visit your authorized
dealer at your earliest possible conve-
nience. Your authorized dealer has diagnos-
tic equipment to determine if the problem
could recur.
If the transmission cannot be reset, authorized
dealer service is required.
229

Overloading your vehicle, long trips in very hot
weather, and driving on bad roads may result in
greater wear.
Life Of TireThe service life of a tire is dependent upon
varying factors including but not limited to:
•Driving style
• Tire pressure
• Distance driven
WARNING!
Tires and the spare tire should be replaced
after six years, regardless of the remaining
tread. Failure to follow this warning can result
in sudden tire failure. You could lose control
and have an accident resulting in serious
injury or death.
Keep unmounted tires in a cool, dry place with
as little exposure to light as possible. Protect
tires from contact with oil, grease and gasoline.
Replacement TiresThe tires on your new vehicle provide a balance
of many characteristics. They should be in-
spected regularly for wear and correct inflation
pressure. The manufacturer strongly recom-
mends that you use tires equivalent to the
originals in quality and performance when re-
placement is needed (see section on tread
wear indicators). Failure to use equivalent re-
placement tires may adversely affect the safety,
handling and ride of your vehicle. We recom-
mend that you contact your local authorized
dealer on any questions you may have on tire
specifications or capability.
WARNING!
• Do not use a tire, wheel size or rating other
than that specified for your vehicle. Some
combinations of unapproved tires and
wheels may change suspension dimen-
sions and performance characteristics, re-
sulting in changes to steering, handling,
and stress to steering and suspension
components. You could lose control and
have an accident resulting in serious injury
or death. Use only the tire and wheel sizes
with load ratings approved for your vehicle.
• Never use a tire smaller than the minimum
tire size listed on your vehicle’s tire placard
unless explicitly instructed to do so by the
vehicle manufacturer (reference tire chain
information in this manual). Using an
under-sized tire could result in tire over-
loading and failure.
•
Failure to equip your vehicle with tires having
adequate speed capability can result in sud-
den tire failure and loss of vehicle control.
(Continued)
1—WornTire
2 — New Tire
255

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 emis-
sions, engine, and automatic transmission con-
trol systems. When these systems are operat-
ing properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current govern-
ment regulations.
If any of these systems require service, the
OBD II system will turn on the “Malfunction
Indicator Light” (MIL). It will also store diagnos-
tic codes and other information to assist your
service technician in making repairs. Although
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 con-
trol 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 indica-
tor will display in the EVIC telltale
display area. Refer to “Electronic
Vehicle Information Center (EVIC)” in “Under-
standing Your Instrument Panel” for further in-
formation. Tighten the fuel filler cap properly
and press the SELECT button to turn off the message. If the problem continues, the mes-
sage 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).
REPLACEMENT PARTSUse of genuine MOPAR
parts for normal/
scheduled maintenance and repairs is highly
recommended to ensure the designed perfor-
mance. Damage or failures caused by the use
of non-MOPAR parts for maintenance and
repairs will not be covered by the manufactur-
er’s warranty.
MAINTENANCE PROCEDURESThe pages that follow contain the required
maintenance services determined by the engi-
neers who designed your vehicle.
Besides those maintenance items specified in
the fixed maintenance schedule, there are
other components which may require servicing
or replacement in the future.
301

MAINTENANCE SCHEDULE
Maintenance Schedule – Gasoline
Engine
The Scheduled Maintenance services listed in
this manual must be done at the times or
mileages specified to protect your vehicle war-
ranty and ensure the best vehicle performance
and reliability. More frequent maintenance may
be needed for vehicles in severe operating
conditions, such as dusty areas and very short
trip driving. Inspection and service should also
be done anytime a malfunction is suspected.
The oil change indicator system will remind you
that it is time to take your vehicle in for sched-
uled maintenance.
On Electronic Vehicle Information Center
(EVIC) equipped vehicles “Oil Change Re-quired” will be displayed in the EVIC and a
single chime will sound, indicating that an oil
change is necessary.
The oil change indicator message will illumi-
nate approximately 7,000 miles (11 200 km)
after the most recent oil change was per-
formed. Have your vehicle serviced as soon as
possible, within 500 miles (800 km).
NOTE:
•
The oil change indicator message will not
monitor the time since the last oil change.
Change your vehicles oil if it has been
6 months since your last oil change even
if the oil change indicator message is
NOT illuminated.
• Change your engine oil more often if you
drive your vehicle off-road for an ex-
tended period of time. •
Under no circumstances should oil
change intervals exceed 7,500 miles
(12 000 km) or 6 months, whichever
comes first.
Your authorized dealer will reset the oil change
indicator message after completing the sched-
uled oil change. If this scheduled oil change is
performed by someone other than your autho-
rized dealer the message can be reset by
referring to the steps described under ”Elec-
tronic Vehicle Information Center” in “Under-
standing Your Instrument Panel” for further in-
formation.
332

Bulb Replacement...........322
Cargo ..................147
Center Mounted Stop ..........325
Daytime Running ............107
Dimmer Switch, Headlight .......105
Electronic Stability Program (ESP)
Indicator .................251
Exterior ..................58
Fog ............... 108,160,323
Fuses ...................318
Hazard Warning Flasher ........282
Headlights ............. 322,323
Headlights On With Wipers .......106
High Beam Indicator ..........160
Hill Descent Control Indicator .....160
Illuminated Entry .............17
Low Fuel .................170
Malfunction Indicator
(Check Engine) .............159
Map Reading ..............109
Reading ............... 109,138
Rear Fog .................164
Rear Servicing ..............324
Rear Tail .................324
Seat Belt Reminder ...........162
Security Alarm (Theft Alarm) ......164
Service ..................322 Service Engine Soon
(Malfunction Indicator)
.........159
Side Marker ...............324
SmartBeams ...............106
Tire Pressure Monitoring (TPMS) ....160
Tow/Haul Indicator ...........160
Traction Control .............251
Turn Signal ......... 58,105,323,324
Vanity Mirror ................69
Locks .....................20
Automatic Door ..............21
Child Protection ..............21
Door ....................20
Power Door ................21
Steering Wheel ..............14
Lower Anchors and Tether for CHildren
(LATCH) ...................51
Lubrication, Body .............305
Maintenance Free Battery .........304
Maintenance Procedures .........301
Maintenance Schedule ........332,344
Malfunction Indicator Light
(Check Engine) ..............159
Memory Feature (Memory Seat) .....101
Memory Seat ................101 Memory Seats and Radio
.........101
Methanol .................. 263
Methanol Fuel ...............263
Mini-Trip Computer ............174
Mirrors ....................67
Automatic Dimming ............67
Electric Powered .............68
Electric Remote ..............68
Exterior Folding ..............68
Heated ...................68
Outside ..................67
Power Folding ...............68
Rearview ..................67
Vanity ...................69
Mode Fuel Saver ................173
Modifications/Alterations, Vehicle ......8
Monitor, Tire Pressure System ......257
Mopar Parts ................301
Multi-Displacement Engine System . . . 244
Multi-Function Control Lever .......105
New Vehicle Break-In Period ........55
Occupant Restraints .........29,41,44
Occupant Restraints (Sedan) ....39,41,43
370

Remote Keyless Entry (RKE)........17
Remote Sound System (Radio)
Controls ...................203
Replacement Bulbs ............322
Replacement Keys .............15
Replacement Parts ............301
Replacement Tires .............255
Restraints, Child ...............47
Restraints, Occupant ............29
Retractable Cargo Area Cover ......148
Roll Over Warning ..............4
Rotation, Tires ...............256
Safety Checks Inside Vehicle .......56
Safety Checks Outside Vehicle ......58
Safety Tips ..................55
Safety, Exhaust Gas ...........29,56
Schedule, Maintenance .......332,344
Seat Belt Reminder .............37
Seat Belts ................ 30,56
Adjustable Upper Shoulder
Anchorage ................33
And Pregnant Women ..........37
Child Restraint ............. 47,53
Front Seat .................30
Inspection .................56 Maintenance
...............318
Pretensioners ...............34
Reminder .................162
Shoulder Belt Anchorage ........33
Untwisting Procedure ...........32
Seats .....................93
Cleaning .................317
Easy Entry ................103
Memory .................101
Power ................. 94,95
Rear Folding ...............100
Security Alarm (Theft Alarm) .......164
Selec-Terrain ................234
Selection of Oil ...............303
Sentry Key (Immobilizer) ..........14
Sentry Key Programming ..........15
Sentry Key Replacement ..........15
Service Assistance ............356
Service Engine Soon Light
(Malfunction Indicator) ..........159
Settings, Personal .............179
Shift Lever Override ............290
Shifting ...................221
Automatic Transmission .........221
Shoulder Belts ................30
Side Airbag .................43
Signals, Turn ......... 58,160,323,324 Smar
tBeams
................106
Snow Chains (Tire Chains) ........254
Sound Systems ..............183
Sound Systems (Radio) ..........183
Spare Tire ............... 253,283
Specifications Fuel (Gasoline) .............262
Oil ....................303
Speed Control (Cruise Control) . . . 115,117
Speedometer ................163
Starting ...................216
Automatic Transmission .........216
Cold Weather ..............218
Engine Fails to Start ...........218
Starting and Operating ..........216
Starting Procedures ............216
Steering Power ................ 242,243
Tilt Column ............. 113,114
Wheel Lock ................14
Wheel, Heated ..............114
Wheel, Tilt .............. 113,114
Steering Wheel Audio Controls ......203
Steering Wheel Mounted Sound
System Controls ..............203
Storage ...................321
Storage, Vehicle ............ 209,321
372

Storing Your Vehicle............321
Sun Roof ................ 139,140
Sun Visor Extension .............69
Sunglasses Storage ............138
Supplemental Restraint
System - Airbag ...............37
Suspension, Air ..............236
Sway Control, Trailer ............248
Synthetic Engine Oil ............303
Tachometer .................159
Telescoping Steering Column ....113,114
Temperature Control, Automatic (ATC) . . 205
Temperature Gauge, Engine Coolant . . 164
Tether Anchor, Child Restraint .......51
Tie Down Hooks, Cargo ..........148
Tilt Steering Column .........113,114
Tires ................... 58,252
Air Pressure ...............253
Chains ..................254
Changing ................283
High Speed ...............253
Inflation Pressures ............253
Jacking ..................283 Pressure Monitor System (TPMS) . . . 257
Pressure Warning Light
.........160
Radial ..................253
Replacement ..............255
Rotation .................256
Spare Tire ................283
Spinning .................253
Tread Wear Indicators .........254
Tongue Weight/Trailer Weight .......270
Tow/Haul Indicator Light .........160
Towing ................. 266,291
Disabled Vehicle ............291
Guide ...................270
Recreational ...............276
Weight ..................270
Towing Eyes ................290
Traction Control ..............246
Trailer Sway Control (TSC) ........248
Trailer Towing ................266
Cooling System Tips ..........275
Hitches ..................275
Minimum Requirements .........271
Trailer and Tongue Weight .......270
Wiring ..................272 Trailer Towing Guide
............270
Trailer Weight ................270
Transfer Case ...............313
Maintenance ...............313
Transmission Automatic ........... 222,226,313
Maintenance ...............

313
Shifting ..................221
Transmitter Battery Service
(Remote Keyless Entry) ...........19
Transmitter Programming
(Remote Keyless Entry) ...........17
Transmitter, Remote Keyless Entry
(RKE) .....................17
Tread Wear Indicators ...........254
Turn Signals ........... 160,323,324
UCI Connector ...............183
Uconnect™ (Hands-Free Phone) .....74
Universal Consumer Interface (UCI)
Connector .................183
Untwisting Procedure, Seat Belt ......32
Upholstery Care ..............317
373