2007 JEEP GRAND CHEROKEE air condition

To determine the battery charge, check the battery test
indicator (if equipped) on top of the battery. Refer to the
illustration.
CAUTION!
•It is essential when replacing the cables on the
battery that the positive cable is attached to the
positive post and the negative cable is attached to
the negative post. Battery posts are marked (+)
positive and negative (-) and identified on the
battery case.
•If a “fast charger” is used while battery is in the
vehicle, disconnect both vehicle battery cables
before connecting the charger to battery. Do not
use a “fast charger” to provide starting voltage.
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
MAINTAINING YOUR VEHICLE 371
7

cleaning of the condenser fins and a performance test.
Drive belt condition should also be checked at this time.
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 Section 3 of the Warranty Information Book for
additional 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.
Refrigerant Recovery and Recycling
R-134a Air Conditioning Refrigerant is a hydrofluorocar-
bon (HFC) that is endorsed by the Environmental Pro-
tection Agency and is an ozone-saving product. How-
ever, the manufacturer recommends that air conditioning
service be performed by dealers or other service facilities
using recovery and recycling equipment.
Power Steering Fluid Check
The power steering system requires the use of Mopar
Hydraulic System Power Steering Fluid (P/N
05142893AA), or equivalent, which meets
DaimlerChrysler Material Standard MS-10838.
372 MAINTAINING YOUR VEHICLE

If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
•Do not overfill the coolant recovery bottle.
•Check antifreeze/coolant freeze point in the radiator
and in the coolant recovery bottle. If antifreeze/
coolant needs to be added, contents of coolant recov-
ery bottle must also be protected against freezing.
•If frequent antifreeze/coolant additions are required,
or if the level in the coolant recovery bottle does not
drop when the engine cools, the cooling system should
be pressure tested for leaks.
•Maintain antifreeze/coolant concentration at 50%
HOAT antifreeze/coolant (minimum) and distilled
water for proper corrosion protection of your engine
which contains aluminum components.
•Make sure that the radiator and coolant recovery
bottle hoses are not kinked or obstructed.
•Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
•Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory cooling performance, poor gas
mileage, and increased emissions.
Hoses and Vacuum/Vapor Harnesses
Inspect surfaces of hoses and nylon tubing for evidence
of heat and mechanical damage. Hard or soft spots,
brittle rubber, cracking, tears, cuts, abrasions, and exces-
sive swelling indicate deterioration of the rubber.
MAINTAINING YOUR VEHICLE 381
7

Service Manual. Also check for accumulations of vegeta-
tion or brush that could become a fire hazard, or conceal
damage to fuel lines, brake hoses, axle pinion seals, and
propeller shafts.
CAUTION!
Under frequent heavy-duty driving conditions,
change all lubricants and lubricate body compo-
nents, all driveline joints and steering linkage more
often than in normal service to prevent excessive
wear.
Appearance Care And Protection From Corrosion
Protection of Body and Paint from Corrosion
Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roadspassable in snow and ice, and those that are sprayed on
trees and road surfaces during other seasons, are highly
corrosive to the metal in your vehicle.
The following maintenance recommendations will enable
you to obtain maximum benefit from the corrosion
resistance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or removal of
paint and protective coatings from your vehicle.
The most common causes are:
•Road salt, dirt and moisture accumulation.
•Stone and gravel impact.
•Insects, tree sap and tar.
•Salt in the air near seacoast localities.
•Atmospheric fallout/industrial pollutants.
MAINTAINING YOUR VEHICLE 389
7

CavityCartridge
FuseMini
FuseDescription
10 10 Amp
RedFinal Drive Control
Module (FDCM),
Heater Ventilation,
Air Conditioning
(HVAC), Switch Bank,
Transfer Case Switch,
O/H, Heater Ventila-
tion, Air Conditioning
(HVAC) Relay, Rear
Park Assist
11 Spare (B+)
12 10 Amp
RedDoor Mods, Mem.
Sw, O/H Lamps, IP
Courtesy Lamps,
Glove Box Lamp (B+)
13 10 Amp
RedAutowipe (R/A)CavityCartridge
FuseMini
FuseDescription
14 20 Amp
YellowCigar Ltr (R/A)
15 10 Amp
RedTire Pressure Trans-
ducers (R/O)
16 10 Amp
RedSteering Control
Module (SCM), Diag.
Connector, Cluster
(B+)
17 15 Amp
BlueFlipper Glass (B+)
19 Spare
(R/S)
20 10 Amp
RedSentry Key Remote
Entry Module
(SKREEM), Cluster
(R/S)
MAINTAINING YOUR VEHICLE 395
7

CavityCartridge
FuseMini
FuseDescription
18 20 Amp
YellowFront Control Module
(FCM) Batt #1
19 20 Amp
YellowLt Trailer-Tow Stop/
Turn
20 20 Amp
YellowFront Control Module
(FCM) Batt #3
21 20 Amp
YellowRt Trailer-Tow Stop/
Turn
22 30 Amp
PinkFinal Drive Control
Module (FDCM)
MOD
23 50 Amp
RedRadiator Fan
27 15 Amp
BlueIgnition Off Draw
(IOD) #1
28 20 Amp
YellowIgnition Off Draw
(IOD) #2CavityCartridge
FuseMini
FuseDescription
29 10 Amp
RedOccupant Restraint
Controller (ORC) R/S
30 10 Amp
RedOccupant Restraint
Controller (ORC)
R/O
VEHICLE STORAGE
If you are leaving your vehicle dormant for more than 21
days you may want to take steps to protect your battery.
You may:
•Remove fuse #27 in the Intelligent Power Module
labeled Ignition-Off Draw (IOD#1).
•Or, disconnect the negative cable from the battery.
•Anytime you store your vehicle, or keep it out of
service (i.e. vacation) for two weeks or more, run the
air conditioning system at idle for about five minutes
400 MAINTAINING YOUR VEHICLE

EMISSION CONTROL SYSTEM MAINTENANCE
The “Scheduled” maintenance services, listed inbold
typemust be done at the times or mileages specified to
assure the continued proper functioning of the emission
control system. These, and all other maintenance services
included in this manual, should be done to provide best
vehicle performance and reliability. More frequent main-
tenance may be needed for vehicles in severe operating
conditions such as dusty areas and very short trip
driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE:Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULES
There are two maintenance schedules that show the
requiredservice for your vehicle.
First is ScheduleB. It is for vehicles that are operated
under the conditions that are listed below and at the
beginning of the schedule.
•Day or night temperatures are below 32°F (0°C)
•Stop and go driving
•Excessive engine idling
•Driving in dusty conditions
•Short trips of less than 10 miles (16.2 km)
•More than 50% of your driving is at sustained high
speeds during hot weather, above 90°F (32°C)
•Trailer towing
•Heavy loading
412 MAINTENANCE SCHEDULES
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ABS (Anti-Lock Brake System)............176,274
Adding Fuel........................... 313
Adding Washer Fluid..................... 165
Adjustable Pedals....................... 124
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 367
Air Conditioner Maintenance............... 371
Air Conditioning........................ 235
Air Conditioning, Operating Tips............ 242
Air Conditioning Refrigerant............... 372
Air Conditioning System.................. 235
AirFilter .............................. 367
Air Pressure, Tires....................... 288
Airbag................................ 43
Airbag Deployment....................... 50
Airbag Light....................... 52,66,176
Airbag Maintenance....................... 51
Alarm (Security Alarm)................. 18,177
Alarm System (Security Alarm)............... 18
Alignment and Balance................... 293Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 230
Antifreeze (Engine Coolant)................ 407
Anti-Lock Brake System (ABS)............129,274
Anti-Lock Warning Light.................. 176
Anti-Theft System..................... 18,177
Appearance Care........................ 389
Auto Down Power Windows................ 30
AutomaticDimmingMirror ................. 72
Automatic Door Locks..................... 27
Automatic Headlights..................... 114
Automatic Temperature Control (ATC)......... 236
Automatic Transmission................254,386
Adding Fluid......................... 387
Fluid and Filter Changes................. 386
Fluid Level Check...................... 386
FluidType ........................... 386
Special Additives...................... 388
Torque Converter...................... 260
452 INDEX