2006 JEEP GRAND CHEROKEE fuel pressure

prevailing road conditions. The“ESP/TCS Indicator
Light”will flash any time the ESP or TCS is active and
helping to improve vehicle stability. If the“ESP/TCS
Indicator Light”is on solid, the ESP system has been
turned off by the driver or a temporary condition exists
that will not allow full ESP function. (See page 131 for
more information.)
12. Tire Pressure Monitoring Telltale Light
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle
has tires of a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you should
determine the proper tire inflation pressure for those
tires.)As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system (TPMS)
that illuminates a low tire pressure telltale when one or
more of your tires is significantly under-inflated. Accord-
ingly, when the low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire to overheat and
can lead to tire failure. Under-inflation also reduces fuel
efficiency and tire tread life, and may affect the vehicle’s
handling and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the TPMS
low tire pressure telltale. (See page 294 for more infor-
mation.)
UNDERSTANDING YOUR INSTRUMENT PANEL 183
4

Tire Pressure Monitor System (TPMS)........294
▫Base System.........................294
▫Premium System......................296
▫General Information...................300

Tire Chains...........................300

Tire Rotation Recommendations............301

Fuel Requirements......................302
▫3.7/4.7L Engines (If Equipped)............302
▫5.7L Engines (If Equipped)...............302
▫Reformulated Gasoline.................303
▫Gasoline/Oxygenate Blends..............303
▫MMT In Gasoline.....................304
▫Materials Added To Fuel................304▫Fuel System Cautions..................304
▫Carbon Monoxide Warnings..............305

Fuel Tank Filler Cap (Gas Cap).............306
▫Loose Fuel Filler Cap Message............307

Trailer Towing.........................308
▫Common Towing Definitions.............309
▫Trailer Hitch Classification...............311
▫Trailer Towing Weights
(Maximum Trailer Weight Ratings).........312
▫Trailer And Tongue Weight..............313
▫Towing Requirements..................314
▫Towing Tips.........................318

Recreational Towing (Behind Motorhome, Etc.) . . 320
STARTING AND OPERATING 249
5

2. Economy—
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under inflation also increases
tire rolling resistance and results in higher fuel consump-
tion.
3. Ride Comfort and Vehicle Stability—
Proper tire inflation contributes to a comfortable ride.
Over inflation produces a jarring and uncomfortable ride.
Both under inflation and over inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.Tire Inflation Pressures
The proper cold tire inflation pressure is listed on either
the face of the driver’s door, or the driver’s side“B”pillar.
The pressure should be checked and adjusted as well as
inspecting for signs of tire wear or visible damage at least
once a month. Use a good quality pocket-type gauge to
Tire Placard Location
288 STARTING AND OPERATING

WARNING!
•Remove the fuel cap (gas cap) slowly to prevent
fuel spray from the filler neck which may cause
injury.
•The volatility of some gasoline may cause a
buildup of pressure in the fuel tank that may
increase while you drive. This pressure can result
in a spray of gasoline and/or vapors when the cap
is removed from a hot vehicle. Removing the cap
slowly allows the pressure to vent and prevents
fuel spray.
•Never have any smoking materials lit in or near
the vehicle when the fuel cap is removed or the
tank filled.
•Never add fuel to the vehicle when the engine is
running.
WARNING!
A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on the
ground while filling.
TRAILER TOWING
In this section you will find safety tips and information
on limits to the type of towing you can reasonably do
with your vehicle. Before towing a trailer carefully re-
view this information to tow your load as efficiently and
safely as possible.
To maintain warranty coverage, follow the requirements
and recommendations in this manual concerning ve-
hicles used for trailer towing.
308 STARTING AND OPERATING

could adversely affect the engine or vehicle performance.
These items should be inspected if a malfunction is
observed or suspected.
Engine Oil
Checking Oil Level
To assure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop.
The best time to check the engine oil level is about 5
minutes after a fully warmed engine is shut off or before
starting the engine after it has sat overnight.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Maintain
the oil level in the SAFE level range. Adding 1 U.S. Quart
(0.95L) of oil when the level is at the bottom of the SAFE
range will result in the level being at the top of the SAFE
range.
CAUTION!
Overfilling or underfilling the crankcase will cause
aeration or loss of oil pressure. This could damage
your engine.
Change Engine Oil
Road conditions as well as your kind of driving affect the
interval at which your oil should be changed. Check the
following to determine if any apply to you:
•Day or night temperatures are below 32°F(0°C)
•Stop and go driving
•Extensive engine idling
•Driving in dusty conditions
•Short trips of less than 10 miles (16.2 km)
MAINTAINING YOUR VEHICLE 351
7

Auxiliary Electrical Outlet (Power Outlet)...... 162
Auxiliary Power Outlet................... 162
Battery............................... 358
Emergency Starting..................... 336
Keyless Transmitter Replacement (RKE)....... 23
Saving Feature (Protection)............... 122
Belts, Drive............................ 354
Belts, Seat.............................. 32
Body Mechanism Lubrication............... 362
B-Pillar Location........................ 283
Brake Assist System...................... 133
Brake Control System, Electronic............. 131
Brake System........................... 369
Anti-Lock (ABS)....................131,269
Hoses.............................. 370
Master Cylinder....................... 370
Parking............................. 267
Warning Light........................ 180Brake/Transmission Interlock............... 255
Break-In Recommendations, New Vehicle........ 68
Bulb Replacement.....................386,387
Capacities, Fluid........................ 392
Caps, Filler
Fuel................................ 306
Radiator (Coolant Pressure)............... 366
Car Washes............................ 376
Carbon Monoxide Warning............69,153,305
Cargo Area Cover....................... 166
Cargo Area Features...................... 165
Cargo Compartment...................... 165
Light............................... 165
Luggage Carrier....................... 171
Cargo Light............................ 165
Cargo Load Floor........................ 169
Cargo Tie-Downs........................ 167
Catalytic Converter...................... 355
INDEX 425
10

Cargo .............................. 165
Center Mounted Stop................... 391
Cruise.............................. 185
Daytime Running...................... 125
Dimmer Switch, Headlight.............121,126
Electronic Stability Program (ESP)
Indicator.......................140,182,185
Electronic Throttle Control Warning......... 186
Fog ..........................125,186,389
Four-Wheel Drive Indicator............... 185
Fuses............................... 380
Hazard Warning Flasher................. 328
Headlight Switch...................... 122
Headlights........................... 387
Headlights On With Wipers............... 123
High Beam Indicator.................... 180
Illuminated Entry....................... 16
Instrument Cluster..................122,124
Interior..........................120,124Lights On Reminder.................... 125
Low Fuel............................ 187
LowTire ............................ 183
Malfunction Indicator (Check Engine)........ 180
Map Reading......................... 120
Oil Pressure.......................... 182
Passing............................. 126
Reading..........................120,152
Rear Servicing........................ 390
Rear Tail............................ 390
Seat Belt Reminder..................... 185
Security Alarm (Theft Alarm).............. 182
Service.............................. 387
Service Engine Soon (Malfunction Indicator) . . . 180
Side Marker.......................... 390
SmartBeams.......................... 123
Tire Pressure Monitoring (TPMS)........... 183
Tow/Haul Indicator.................... 184
Traction Control....................140,182
432 INDEX

Rearview............................. 78
Vanity............................... 82
Modifications/Alterations, Vehicle............. 8
Monitor, Tire Pressure System............... 294
Mopar Parts.........................349,419
Multi-Displacement Engine System........... 278
Multi-Function Control Lever............... 121
New Vehicle Break-In Period................ 68
Occupant Restraints....................... 31
Octane Rating, Gasoline (Fuel).............. 302
Odometer..........................184,185
Trip ................................ 184
Off-Pavement Driving (Off-Road)..........274,375
Off-Road Driving (Off-Pavement)..........274,375
Oil, Engine............................ 351
Capacity............................ 392
Change Interval....................... 351Dipstick............................. 351
Filter............................... 354
Identification Logo..................... 353
Materials Added to..................... 354
Pressure Warning Light.................. 182
Recommendation...................352,392
Viscosity..........................353,392
Onboard Diagnostic System..............347,348
Opener, Garage Door (HomeLink) ........... 152
Outside Rearview Mirrors.................. 80
Overdrive............................. 257
Overdrive OFF Switch.................... 257
Overhead Console....................... 151
Overheating, Engine...................184,329
Owner’s Manual (Operator Manual).......... 420
Paint Care............................. 376
Paint Damage.......................... 376
Panic Alarm............................ 22
434 INDEX