2012 JEEP GRAND CHEROKEE oil pressure

Air Conditioner Maintenance
For best possible performance, your air conditioner
should be checked and serviced by an authorized dealer
at the start of each warm season. This service should
include cleaning of the condenser fins and a performance
test. Drive belt condition should also be checked at this
time.
CAUTION!
Do not use chemical flushes in your air conditioning
system as the chemicals can damage your air condi-
tioning components. Such damage is not covered by
the New Vehicle Limited Warranty.
WARNING!
•Use only refrigerants and compressor lubricants
approved by the manufacturer for your air condi-
tioning system. Some unapproved refrigerants are
flammable and can explode, injuring you. Other
unapproved refrigerants or lubricants can cause
the system to fail, requiring costly repairs. Refer to
Warranty Information Book, located on the DVD,
for further warranty information.
•The air conditioning system contains refrigerant
under high pressure. To avoid risk of personal
injury or damage to the system, adding refrigerant
or any repair requiring lines to be disconnected
should be done by an experienced repairman.
NOTE: Use only manufacturer approved A/C System
Sealers, Stop Leak Products, Seal Conditioners, Compres-
sor Oil, and Refrigerants.
7
MAINTAINING YOUR VEHICLE 585

Once A Month
•Check tire pressure and look for unusual wear or
damage.
•Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and transmission
(5.7L only) 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.
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.
8
M
A I
N T
E
N A
N CE
S
C
H E
D
U L
E
S630 MAINTENANCE SCHEDULES

Cooling System......................... 592
Adding Coolant (Antifreeze) ............. 594
Coolant Capacity ..................... 622
Coolant Level ....................... 596
Disposal of Used Coolant ............... 596
Drain, Flush, and Refill ................ 593
Inspection .......................... 592
Points to Remember .................. 596
Pressure Cap ........................ 595
Radiator Cap ....................... 595
Selection of Coolant (Antifreeze) .......593,622
Cruise Control (Speed Control) .............. 201
Cupholders ............................ 264
Customer Assistance ..................... 647
Data Recorder, Event ...................... 80
Daytime Running Lights ................... 183
Dealer Service .......................... 578 Defroster, Rear Window
................... 275
Defroster, Windshield ................96,396,403
Diagnostic System, Onboard ................ 575
Dipsticks Automatic Transmission ................ 603
Oil (Engine) ........................ 579
Power Steering ...................... 461
Disabled Vehicle Towing ................... 566
Disposal Engine Oil ......................... 582
Used Engine Fluids ................... 582
Door Locks ............................. 33
Door Locks, Automatic .................... 35
Door Opener, Garage ..................... 242
Driving ............................... 453
Off-Pavement ....................... 454
Off-Road .......................... 454
Driving to Achieve Maximum Fuel Economy .... 311
10
INDEX 659

Supplemental Restraint System - Airbag........ 66
Suspension, Air ......................... 448
Sway Control, Trailer ..................... 470
Synthetic Engine Oil ...................... 581
System, Remote Starting .................... 29
Tachometer ............................ 285
Telescoping Steering Column .............194,195
Temperature Control, Automatic (ATC) ........ 398
Temperature Gauge, Engine Coolant .......... 294
Tether Anchor, Child Restraint ............... 85
Text Messaging ......................... 143
Tie Down Hooks, Cargo ................... 273
Tilt Steering Column ................... 194,195
Tire and Loading Information Placard ......... 483
Tire Identification Number (TIN) ............. 481
Tire Markings .......................... 477
Tire Safety Information .................... 477 Tires ............................
98,487,653
Air Pressure ........................ 488
Chains ............................ 496
Changing .......................... 549
Compact Spare ...................... 491
General Information .................. 487
High Speed ......................... 490
Inflation Pressures .................... 488
Jacking ............................ 549
Life of Tires ........................ 494
Load Capacity .................... 483,484
Pressure Monitor System (TPMS) ......... 499
Pressure Warning Light ................ 288
Quality Grading ..................... 653
Radial ............................ 490
Replacement ........................ 495
Rotation ........................... 498
Safety ............................. 477
Sizes ............................. 479
672 INDEX