2009 JEEP GRAND CHEROKEE fuel pressure

Each axle’s GAWR is determined by the components in
the system with the lowest load carrying capacity (axle,
springs, tires, or wheels). Heavier axles or suspension
components, sometimes specified by purchasers for in-
creased durability, does not necessarily increase the ve-
hicle’s GVWR.
Tire Size
The tire size on the label represents the actual tire size on
your vehicle. Replacement tires must be equal to the load
capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo
loaded into the vehicle. The front and rear curb weight
values are determined by weighing your vehicle on a
commercial scale before any occupants or cargo are
added.
Loading
The actual total weight and the weight of the front and
rear of your vehicle at the ground can best be determined
by weighing it when it is loaded and ready for operation.
The entire vehicle should first be weighed on a commer-
cial scale to ensure that the GVWR has not been ex-
ceeded. The weight on the front and rear of the vehicle
should then be determined separately to be sure that the
load is properly distributed over front and rear axle.
Weighing the vehicle may show that the GAWR of either
368 STARTING AND OPERATING

operate satisfactorily without periodic maintenance.
However, if a malfunction of these items does occur, it
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 five 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.
3.0L Diesel Engine Only
Before checking the engine oil level, turn the engine off
and wait 15 minutes to allow for the oil to return to the oil
pan.
Change Engine Oil
Refer to the “Maintenance Schedule” in Section 8 for
proper maintenance intervals.
414 MAINTAINING YOUR VEHICLE

if it has been 6 months since your last oil change even
if the oil change indicator message is NOT illumi-
nated.
•Change your engine oil more often if you drive your
vehicle off-road for an extended period of time.
•Under no circumstances should oil change intervals
exceed 6,000 miles (10,000 km) or 6 months, whichever
comes first.
Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If this
scheduled oil change is performed by someone other
than your authorized dealer the message can be reset by
referring to the steps described under ”Electronic Vehicle
Information Center” in Section 4 of this manual.
At Each Stop for Fuel
•Check the engine oil level about 5 minutes after a fully
warmed engine is shut off. Checking the oil level whilethe vehicle is on level ground will improve the accu-
racy of the oil level reading. Add oil only when the
level is at or below the ADD or MIN mark.
•Check the windshield washer solvent and add if
required.
Once a Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and transmission
(4.7L and 5.7L only) and add as needed.
•Check all lights and other electrical items for correct
operation.
MAINTENANCE SCHEDULES 463
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•Check the windshield washer solvent and add if
required.
Once a Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of the coolant reservoir, brake
master cylinder, and power steering and add as
needed.
•Check all lights and other electrical items for correct
operation.
At Each Oil Change
•Change the engine oil filter.
•Inspect the brake hoses and lines.
•Inspect for the presence of water in the fuel filter/
water separator unit.
CAUTION!
Failure to perform the required maintenance items
may result in damage to the vehicle.
Required Maintenance Intervals
Refer to the Maintenance Schedules on the following
pages for the required maintenance intervals.
MAINTENANCE SCHEDULES 477
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ABS (Anti-Lock Brake System).............. 309
Adding Fuel........................... 364
Adjustable Pedals....................... 143
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 417
Air Conditioner Maintenance............... 419
Air Conditioning........................ 264
Air Conditioning, Operating Tips............ 271
Air Conditioning Refrigerant............... 420
Air Conditioning System.................. 264
Air Filter.............................. 417
Air Pressure, Tires....................... 336
Airbag................................ 46
Airbag Deployment....................... 53
Airbag Light.......................56,71,186
Airbag Maintenance....................... 55
Alarm, Panic............................ 25
Alarm (Security Alarm).................20,187
Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 253Antifreeze (Engine Coolant)................ 456
Anti-Lock Brake System (ABS)............309,312
Anti-Lock Warning Light.................. 186
Anti-Theft System....................... 187
Appearance Care........................ 436
Arming Theft System (Security Alarm)......... 20
Assist, Hill Start........................ 320
Assistance Towing........................ 97
Auto Down Power Windows................ 32
Automatic Dimming Mirror................. 78
Automatic Door Locks..................... 30
Automatic Headlights.................... 131
Automatic Temperature Control (ATC)......... 264
Automatic Transmission................288,433
Adding Fluid......................... 435
Fluid and Filter Changes................. 433
Fluid Level Check..................... 434
Fluid Type........................... 433
Special Additives...................... 433
498 INDEX

Torque Converter...................... 294
Autostick............................. 290
Auxiliary Electrical Outlet (Power Outlet)...... 163
Auxiliary Power Outlet................... 163
Battery............................... 418
Emergency Starting..................... 398
Keyless Transmitter Replacement (RKE)....... 25
Saving Feature (Protection)............... 135
Belts, Seat............................37,70
Body Mechanism Lubrication............... 420
B-Pillar Location........................ 331
Brake Assist System...................... 313
Brake Control System, Electronic............. 312
Brake Fluid............................ 430
Brake System........................... 430
Anti-Lock (ABS)....................309,312
Fluid Check.......................... 430
Master Cylinder....................... 430Parking............................. 308
Warning Light........................ 184
Brake/Transmission Interlock............... 287
Break-In Recommendations, New Vehicle........ 68
Bulb Replacement.....................449,450
Bulbs, Light............................ 71
Calibration, Compass..................... 201
Camera, Rear........................... 151
Capacities, Fluid........................ 456
Caps, Filler
Fuel............................... 364
Power Steering........................ 307
Radiator (Coolant Pressure)............... 427
Car Washes............................ 437
Carbon Monoxide Warning...............69,359
Cargo Area Cover....................... 168
Cargo Area Features...................... 167
Cargo Compartment...................... 167
INDEX 499
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Drain, Flush, and Refill.................. 425
Inspection........................... 424
Points to Remember.................... 429
Pressure Cap......................... 427
Radiator Cap......................... 427
Selection of Coolant (Antifreeze).........425,456
Cruise Light........................... 191
Cupholders............................ 167
Customer Assistance..................... 489
Data Recorder, Event...................... 56
Daytime Running Lights................... 133
Dealer Service.......................... 413
Defroster, Rear Window................... 173
Defroster, Windshield................71,263,269
Diagnostic System, Onboard................ 410
Diesel Fuel............................ 360
Diesel Fuel Requirements.................. 360
Dimmer Switch, Headlight................. 137Dipsticks
Automatic Transmission................. 434
Oil (Engine).......................... 414
Power Steering........................ 307
Disabled Vehicle Towing................... 401
Disarming, Theft System................... 21
Disposal
Engine Oil........................... 417
Used Engine Fluids.................... 417
Door Locks............................. 29
Door Locks, Automatic.................... 30
Door Opener, Garage..................... 154
Driving............................... 301
Off-Pavement......................... 302
Off-Road............................ 302
DVD Player (Video Entertainment System™).... 257
E-85 Fuel............................. 361
Electric Remote Mirrors.................... 80
INDEX 501
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Bulb Replacement...................... 450
Cargo .............................. 167
Center Mounted Stop................... 455
Cruise.............................. 191
Daytime Running...................... 133
Dimmer Switch, Headlight.............130,137
Electronic Stability Program (ESP) Indicator . . . 325
Electronic Throttle Control Warning......... 192
Exterior.............................. 71
Fog ..........................135,192,453
Four-Wheel Drive Indicator............... 191
Fuses............................... 441
Glow Plug Light....................... 193
Hazard Warning Flasher................. 390
Headlight Switch...................... 130
Headlights........................450,451
Headlights On With Wipers............... 131
High Beam Indicator.................... 185
Illuminated Entry....................... 21Instrument Cluster..................130,134
Interior..........................134,137
Lights On Reminder.................... 135
Low Fuel............................ 193
Malfunction Indicator (Check Engine)........ 185
Map Reading......................... 138
Oil Pressure.......................... 187
Passing............................. 137
Reading..........................138,153
Rear Servicing........................ 454
Rear Tail............................ 454
Seat Belt Reminder..................... 191
Security Alarm (Theft Alarm).............. 187
Service............................. 450
Service Engine Soon (Malfunction Indicator) . . . 185
Side Marker.......................... 454
SmartBeams.......................... 132
Tire Pressure Monitoring (TPMS)........... 187
Tow/Haul Indicator.................... 190
INDEX 507
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