2012 JEEP GRAND CHEROKEE towing

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
472 MAINTAINING YOUR VEHICLE

WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may indicate severe
and abnormal catalyst overheating. If this occurs, the
vehicle should be stopped, the engine shut off and the
vehicle allowed to cool. Thereafter, service, including a
tune-up to manufacturer’s specifications, should be ob-
tained immediately.To minimize the possibility of catalyst damage:•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idling or malfunctioning operating conditions.
488 MAINTAINING YOUR VEHICLE

60,000 Miles (100,000 km) or 60 Months Maintenance Service
Schedule
❏Change the engine oil and engine oil filter.
❏Replace the engine air cleaner filter.
❏Inspect the brake linings; replace if necessary.
❏Adjust parking brake on vehicles equipped with four-wheel disc brakes.
❏Change the automatic transmission fluid and filter(s) if using your vehicle for any of the
following: police, taxi, fleet, or frequent trailer towing.
❏Drain the transfer case and refill.
❏Inspect the accessory drive belt(s), replace if necessary.
❏Flush and replace the engine coolant at 60 months if not done at 102,000 miles
(170 000 km).
❏Inspect the front suspension, tie rod ends and boot seals for cracks or leaks and all parts for
damage, wear, improper looseness or end play; replace if necessary.
Odometer Reading Date
Repair Order # Dealer Code
Signature, Authorized Service Center
66,000 Miles (110,000 km) or
66 Months Maintenance
Service Schedule
❏Change the engine oil and engine oil
filter.
Odometer Reading Date
Repair Order # Dealer Code
Signature, Authorized Service Center
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S528 MAINTENANCE SCHEDULES

Adaptive Cruise Control (ACC) (Cruise Control) . . 201
Adding Engine Coolant (Antifreeze).......... 491
Adding Fuel........................... 440
Additives, Fuel......................... 438
Air Conditioner Maintenance............... 481
Air Conditioning Refrigerant............... 482
Air Conditioning System.................. 361
Air Conditioning, Operating Tips............ 367
Air Pressure, Tires....................... 419
Airbag.............................. 67,76
Airbag Deployment....................... 78
Airbag Light..................... 75,80,97,284
Airbag Maintenance....................... 79
Airbag, Side........................ 70,73,76
Airbag, Window (Side Curtain)........... 71,73,76
Alarm (Security Alarm)................. 18,292
Alarm, Panic............................ 24
Alterations/Modifications, Vehicle............. 8
Antenna, Satellite Radio................... 347Anti-Lock Brake System (ABS).............. 400
Anti-Lock Warning Light.................. 291
Anti-Theft System....................... 292
Antifreeze (Engine Coolant)..............490,517
Disposal........................... 492
Appearance Care........................ 499
Assistance Towing....................... 125
Auto Down Power Windows................ 41
Automatic Dimming Mirror................ 108
Automatic Door Locks..................... 33
Automatic Headlights.................... 180
Automatic Temperature Control (ATC)......... 361
Automatic Transmission................382,498
Autostick.......................... 389
Fluid Level Check.................... 499
FluidType ......................... 498
Special Additives..................... 498
Autostick............................. 389
Auxiliary Electrical Outlet (Power Outlet)...... 258
548 INDEX

Selection of Coolant (Antifreeze).......490,517
Cruise Control (Speed Control).............. 201
Cupholders............................ 264
Customer Assistance..................... 539
Data Recorder, Event...................... 81
Daytime Running Lights................... 182
Dealer Service.......................... 474
Defroster, Rear Window................... 275
Defroster, Windshield................... 97,366
Diagnostic System, Onboard................ 472
Disabled Vehicle Towing................... 468
Disposal
Antifreeze (Engine Coolant)............. 492
Door Locks............................. 31
Door Locks, Automatic.................... 33
Door Opener, Garage..................... 241Driving
Through Flowing, Rising, or Shallow
Standing Water...................... 394
Driving to Achieve Maximum Fuel Economy.... 309
Electric Remote Mirrors................... 109
Electrical Outlet, Auxiliary (Power Outlet)...... 258
Electronic Brake Control System............. 400
Anti-Lock Brake System................ 400
Brake Assist System................... 401
Electronic Roll Mitigation............... 402
Traction Control System................ 400
Electronic Roll Mitigation (ERM)............. 402
Electronic Speed Control (Cruise Control)....198,201
Electronic Stability Control (ESC)............. 402
Electronic Vehicle Information Center
(EVIC).............................286,294
Emergency, In Case of
Hazard Warning Flasher............... 460
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INDEX 551

Garage Door Opener (HomeLink®)........... 241
Gas Cap (Fuel Filler Cap)............440,443,472
Gasoline (Fuel)......................... 435
Conserving......................... 309
Gasoline, Clean Air...................... 436
Gasoline, Reformulated................... 436
Gauges
Coolant Temperature.................. 292
Fuel.............................. 292
Speedometer........................ 291
Tachometer......................... 284
Gear Ranges........................... 383
Gear Select Lever Override................. 467
General Information............ 18,27,141,222,435
Glass Cleaning.......................... 503
Gross Axle Weight Rating...............444,447
Gross Vehicle Weight Rating.............444,446
GVWR ............................... 444Hands-Free Phone (Uconnect™)............. 111
Hazard
Driving Through Flowing, Rising, or Shallow
Standing Water...................... 394
Hazard Warning Flasher................... 460
Headlights............................ 512
Bulb Replacement.................... 512
On With Wipers..................... 180
Replacing.......................... 512
Heated Mirrors......................... 110
High Beam Indicator..................... 286
Hill Descent Control Indicator............... 286
Hitches
TrailerTowing ....................... 449
Holder,Cup ........................... 264
HomeLink® (Garage Door Opener) Transmitter . . 241
Hood Release.......................... 177
Ignition............................... 14
554 INDEX

Reclining Front Seats..................... 161
Recorder, Event Data...................... 81
Recreational Towing...................... 457
Reformulated Gasoline.................... 436
Refrigerant............................ 482
Reminder, Seat Belt....................... 64
Remote Control
Starting System....................... 27
Remote Keyless Entry (RKE)................. 22
Remote Sound System (Radio) Controls........ 358
Remote Starting System.................... 27
Replacement Bulbs....................... 511
Replacement Keys........................ 17
Replacement Parts....................... 474
Replacement Tires....................... 426
Reporting Safety Defects................... 542
Restraints, Child......................... 82
Restraints, Occupant...................... 48
Retractable Cargo Area Cover............... 271Roll Over Warning........................ 4
Rotation,Tires .......................... 427
Safety Checks Inside Vehicle................. 97
Safety Checks Outside Vehicle............... 99
Safety Defects, Reporting.................. 542
Safety Information, Tire................... 408
Safety Tips............................. 95
Safety, Exhaust Gas..................... 47,96
Satellite Radio Antenna................... 347
Schedule, Maintenance.................... 522
Seat Belt Reminder....................... 64
Seat Belts............................ 51,97
Adjustable Upper Shoulder Anchorage...... 57
And Pregnant Women.................. 66
Child Restraint..................... 82,90
Extender........................... 66
Front Seat.......................... 51
Inspection.......................... 97
560 INDEX

Tires ............................ 99,418,545
Air Pressure........................ 419
Compact Spare...................... 422
General Information.................. 418
High Speed......................... 420
Inflation Pressures.................... 419
LifeofTires ........................ 425
Load Capacity....................414,415
Pressure Monitor System (TPMS)......... 428
Pressure Warning Light................ 287
Quality Grading..................... 545
Radial............................ 421
Replacement........................ 426
Rotation........................... 427
Safety............................. 408
Sizes ............................. 410
Spinning ........................... 424
Tread Wear Indicators................. 424
Tongue Weight/Trailer Weight.............. 451Tow Hooks, Emergency................... 466
Tow/Haul Indicator Light................. 286
Towing ............................446,468
24-Hour Towing Assistance............. 125
Behind a Motorhome.................. 457
Disabled Vehicle..................... 468
Guide ............................. 450
Recreational........................ 457
Weight ............................ 450
Towing Assistance....................... 125
Towing Vehicle Behind a Motorhome.......... 457
Traction Control......................... 400
Trailer Sway Control (TSC)................. 406
TrailerTowing .......................... 446
Cooling System Tips.................. 456
Hitches............................ 449
Minimum Requirements................ 452
Trailer and Tongue Weight.............. 451
TrailerTowingGuide ..................... 450
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INDEX 563