2010 JEEP GRAND CHEROKEE heating

Dual-Zone Manual Heating and Air
Conditioning
The Dual-Zone Manual Climate Controls allow
both driver and front passenger seat occu-
pants to select individual comfort settings. The
controls consist of a series of outer rotary dials
and inner push knobs.Blower Control
Rotate this control to
regulate the amount of
air forced through the
ventilation system in
any mode. The blower
speed increases as you
move the control to the
right from the “O” (OFF)
position. There are
seven blower speeds.
Temperature Controls
• Driver Temperature Control
Rotate this control to
regulate the tempera-
ture of the air inside the
passenger compart-
ment for the left front
seat occupant. Rotating
the dial left into the blue
area of the scale indi-
cates cooler tempera-
tures while rotating right
into the red area indicates warmer tempera-
tures. •
Passenger Temperature Control
Rotate this control to
regulate the tempera-
ture of the air inside the
passenger compart-
ment for the right front
seat occupant. Rotating
the dial left into the blue
area of the scale indi-
cates cooler tempera-
tures while rotating right
into the red area indicates warmer tempera-
tures.
NOTE:
If your air conditioning performance seems
lower than expected, check the front of the
A/C condenser located in front of the radia-
tor for an accumulation of dirt or insects.
Clean with a gentle water spray from behind
the radiator and through the condenser.
Fabric front fascia protectors may reduce
airflow to the condenser, reducing air con-
ditioning performance.
186

Overdrive Operation
The automatic transmission includes an elec-
tronically controlled Overdrive (fifth gear for
3.6L and 3.0L Diesel engine, fourth and fifth
gears for 5.7L engine). The transmission will
automatically shift to Overdrive, if the following
conditions are present:
•the shift lever is in DRIVE;
• the engine coolant has reached normal op-
erating temperature;
• vehicle speed is above approximately
30 mph (48 km/h);
• the TOW/HAUL switch has not been acti-
vated;
• transmission has reached normal operating
temperature.
NOTE:
If the vehicle is started in extremely cold
temperatures, the transmission may not
shift into Overdrive and will automatically
select the most desirable gear for operation
at this temperature. Normal operation will
resume when the transmission fluid tem-
perature has risen to a suitable level. Refer to the “Note” under “Torque Converter
Clutch” in this section.
During cold temperature operation you may
notice delayed upshifts, depending on en-
gine and transmission temperature. This
feature improves the warm-up time of the
engine and transmission.
If the transmission temperature gets ex-
tremely hot, the transmission will automati-
cally select the most desirable gear for op-
eration at this temperature. If the
transmission temperature becomes hot
enough, the “TRANSMISSION OVER TEMP”
message may display, and the transmission
may downshift out of Overdrive until the
transmission cools down. After cool down,
the transmission will resume normal opera-
tion.
The transmission will downshift from Overdrive,
to the most desirable gear, if the accelerator
pedal is fully pressed at vehicle speeds above
approximately 35 mph (56 km/h).
When to Use TOW/HAUL Mode –
If Equipped
When driving in hilly areas, towing a trailer,
carrying a heavy load, etc., and frequent trans-
mission shifting occurs, press the TOW/HAUL
switch. This will improve performance and re-
duce the potential for transmission overheating
or failure due to excessive shifting. When oper-
ating in TOW/HAUL mode, the transmission will
shift into direct gear and Overdrive will be
enabled under steady cruise conditions.
TOW/HAUL Switch
208

•If the vehicle has not been driven in sev-
eral days, the first few seconds of opera-
tion after shifting the transmission into
gear may seem sluggish. This is due to
the fluid partially draining from the torque
converter into the transmission. This con-
dition is normal and will not cause dam-
age to the transmission. The torque con-
verter will refill within five seconds after
starting the engine.
Rocking the VehicleIf the vehicle becomes stuck in snow, sand, or
mud, it can often be moved by a rocking
motion. Move the shift lever between DRIVE
and REVERSE, while applying slight pressure
to the accelerator.
NOTE:
The Electronic Stability Control (ESC) and
Traction Control System (TCS) (if equipped)
should be turned OFF before attempting to
rock the vehicle. Refer to “Electronic Brake
Control System” in “Starting and Operating”
for further information. The least amount of accelerator pedal pressure
to maintain the rocking motion, without spinning
the wheels or racing the engine, is most effec-
tive. Racing the engine or spinning the wheels
may lead to transmission overheating and fail-
ure. Allow the engine to idle with the shift lever
in NEUTRAL for at least one minute after every
five rocking-motion cycles. This will minimize
overheating and reduce the risk of transmission
failure during prolonged efforts to free a stuck
vehicle.CAUTION!
When “rocking” a stuck vehicle by moving
between “First” and REVERSE, do not spin
the wheels faster than 15 mph (24 km/h) or
drivetrain damage may result.
FOUR-WHEEL DRIVE OPERATION
Quadra-Trac II
Operating
Instructions/Precautions
The Quadra-Trac II transfer case is fully auto-
matic in the normal driving 4WD AUTO mode.
The Quadra-Trac II transfer case provides
three mode positions:
• 4WD HI
• NEUTRAL
• 4WD LOW
This transfer case is fully automatic in the 4WD
HI mode.
Transfer Case Switch
210

sive shifting and heat buildup. This action
will also provide better engine braking.
The transmission fluid and filter should be
changed if you REGULARLY tow a trailer for
more than 45 minutes of continuous operation.
Refer to “Maintenance Schedule” for the proper
maintenance intervals.
NOTE:
Check the transmission fluid level before
towing (5.7L engine).
To help maintain a comfortable operating
temperature for your transmission, it is rec-
ommended that when towing a maximum
loaded trailer up steep grades with switch
backs, you should use the ERS function on
the transmission shifter to lock your vehicle
into first gear (5.7L Models Only).
Electronic Speed Control – If Equipped
Do not use in hilly terrain or with heavy loads.
When using the speed control, if you expe-rience speed drops greater than 10 mph
(16 km/h), disengage until you can get back
to cruising speed. Use speed control in flat terrain and with light
loads to maximize fuel efficiency.
Cooling System
To reduce potential for engine and transmission
overheating, take the following actions:
City Driving
When stopped for short periods of time, shift
the transmission into NEUTRAL and increase
engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
Trailer Hitch Attaching Points
Your vehicle will require extra equipment to tow
a trailer safely and efficiently. The trailer tow
hitch must be attached to your vehicle using
the provided attaching points on the vehicle’s
frame. Refer to the following chart to determine
the accurate attaching points. Other equip-
ment, such as trailer sway controls and braking
equipment, trailer equalizing (leveling) equip-
ment and low profile mirrors, may also be
required or strongly recommended.
Trailer Tow Hitch Attaching Points And Overhang Dimensions
Fixed, Detach
and Retractable Hitch
A 1.85 ft. (565 mm)
B 2.09 ft. (636 mm)
C 2.32 ft. (707 mm)
D 2.4 ft. (733 mm)
E 1.62 ft. (494 mm)
F 1.47 ft. (447 mm)
G (Maximum Overhang) 3.59 ft. (1093 mm)
250

HAZARD WARNING FLASHERSThe Hazard Warning flasher switch is located
on the switch bank just above the climate
controls.Press the switch to turn on the Hazard
Warning flasher. When the switch is
activated, all directional turn signals will
flash on and off to warn oncoming
traffic of an emergency. Press the switch a
second time to turn off the Hazard Warning
flasher.
This is an emergency warning system and it
should not be used when the vehicle is in
motion. Use it when your vehicle is disabled
and it is creating a safety hazard for other
motorists.
When you must leave the vehicle to seek assis-
tance, the Hazard Warning flasher will continue
to operate even though the ignition is placed in
the OFF position.
NOTE:
With extended use the Hazard Warning
flasher may wear down your battery.IF YOUR ENGINE OVERHEATSIn any of the following situations, you can
reduce the potential for overheating by taking
the appropriate action.
• On the highways — slow down.
• In city traffic — while stopped, place the
transmission in NEUTRAL, but do not in-
crease the engine idle speed.
NOTE:
There are steps that you can take to slow
down an impending overheat condition:
• If your air conditioner (A/C) is on, turn it
off. The A/C system adds heat to the
engine cooling system and turning the
A/C off can help remove this heat.
• You can also turn the temperature control
to maximum heat, the mode control to
floor and the blower control to high. This
allows the heater core to act as a supple-
ment to the radiator and aids in removing
heat from the engine cooling system.CAUTION!
Driving with a hot cooling system could dam-
age your vehicle. If the temperature gauge
reads HOT (H), pull over and stop the vehicle.
Idle the vehicle with the air conditioner turned
off until the pointer drops back into the normal
range. If the pointer remains on HOT (H), and
you hear continuous chimes, turn the engine
off immediately and call for service.
WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from
your radiator. If you see or hear steam coming
from under the hood, do not open the hood
until the radiator has had time to cool. Never
try to open a cooling system pressure cap
when the radiator or coolant bottle is hot.
258

WARNING!
Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you uncon-
scious and can eventually poison you. To
avoid breathing CO, refer to “Safety Tips/
Exhaust Gas” in “Things To Do Before Starting
Your Vehicle” for further information.
CAUTION!
The catalytic converter requires the use of
unleaded fuel only. Leaded gasoline will de-
stroy the effectiveness of the catalyst as an
emissions control device and may seriously
reduce engine performance and cause seri-
ous damage to the engine.
Under normal operating conditions, the cata-
lytic converter will not require maintenance.
However, it is important to keep the engine
properly tuned to assure proper catalyst opera-
tion and prevent possible catalyst damage.
CAUTION!
Damage to the catalytic converter can result if
your vehicle is not kept in proper operating
condition. In the event of engine malfunction,
particularly involving engine misfire or other
apparent loss of performance, have your ve-
hicle serviced promptly. Continued operation
of your vehicle with a severe malfunction
could cause the converter to overheat, result-
ing in possible damage to the converter and
vehicle.
NOTE:
Intentional tampering with emissions con-
trol systems can result in civil penalties
being assessed against you.WARNING!
A hot exhaust system can start a fire if you
park over materials that can burn. Such ma-
terials 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 malfunc-
tioning engine operation, a scorching odor may
suggest severe and abnormal catalyst over-
heating. If this occurs, stop the vehicle, turn off
the engine and allow it to cool. Service, includ-
ing a tuneup to manufacturer’s specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter
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 the engine by pushing or
towing the vehicle.
279

Cav-ity Car-
tridge Fuse Mini
Fuse Description
J21 20 Amp Blue Front/Rear
Washer Control
J22 25 Amp Natural Sunroof Module
M1 15 Amp BlueStop Lamps
M2 20 Amp YellowElectronic Limit
Slip Differential/Air
Suspension
M3 20 Amp YellowLiftgate/Headrest
M5 25 Amp Natural115V AC Power
Inverter
M6 20 Amp YellowCigar Lighter
M7 20 Amp YellowPower Outlet #2
(Switchable)
M8 20 Amp YellowFront Heated Seat
& Steering Wheel
M9 20 Amp YellowRear Heated
SeatsCav-
ity Car-
tridge Fuse Mini
Fuse Description
M10 15 Amp BlueVideo/Universal
Garage Door
Opener
M11 10 Amp RedHeating, Ventila-
tion & Air Condi-
tioning (Climate
Control System)
M12 30 Amp GreenRadio/Amplifier
M13 20 Amp YellowInstrument Cluster
M14 20 Amp YellowBack Up CameraCav-
ity Car-
tridge Fuse Mini
Fuse Description
M15 20 Amp YellowPower Seat
Module(s)/
Adaptive Cruise
Control/Audio
Telematics/
Daytime Running
Lights Relay/Air
Suspension
Module/Instrument
Cluster
M16 10 Amp RedOccupant Re-
straint Controller
M19 25 Amp NaturalAutomatic Shut-
down 1 and 2
M20 15 Amp BlueInstrument Cluster
M21 20 Amp YellowAutomatic Shut-
down 3
M22 10 Amp RedHorns (Low/High)
– Right
M23 10 Amp RedHorns (Low/High)
– Left
291

Emergency, In Case ofFreeing Vehicle When Stuck ......210
Hazard Warning Flasher ........258
Jacking ..................259
Jump Starting ..............262
Engine Air Cleaner ................276
Break-In Recommendations .......54
Compartment .........270,271,272
Compartment Identification . . 270,271,272
Cooling ..................280
Exhaust Gas Caution .........28,55
Fails to Start ...............202
Flooded, Starting ............202
Fuel Requirements .........240,297
Jump Starting ..............262
Multi-Displacement ...........222
Oil .................. 274,297
Oil Change Interval ...........274
Oil Disposal ...............276
Oil Filter .................276
Oil Selection .......... 274,275,297
Oil Synthetic ...............275
Overheating ...............258
Starting ..................200
Temperature Gauge ...........163
Engine Oil Viscosity ............275 Engine Oil Viscosity Chart
........275
Enhanced Accident Response Feature . . 43
Entry System, Illuminated ..........16
Ethanol ...................241
Event Data Recorder ............45
Exhaust Gas Caution ........28,55,279
Exhaust System ............ 55,278
Exterior Finish Care ............287
Exterior Lights ................57
Filters Air Cleaner ................276
Engine Oil ................276
Finish Care .................287
Flashers ..................258
Hazard Warning .............258
Turn Signal ......... 57,159,294,295
Flipper Glass, Liftgate ...........26
Flooded Engine Starting .........202
Fluid Capacities ..............297
Fluid Leaks .................57
Fluid Level Checks Automatic Transmission ......285,286
Brake ...................283
Engine Oil
................274
Power Steering .............221 Fluids, Lubricants and Genuine Parts . . 298
Fog Light Service
.............294
Fog Lights ............ 109,159,294
Fog Lights, Rear ..............163
Folding Rear Seat .............101
Four Wheel Drive ........... 210,213
Operation ................210
Systems .................210
Four Wheel Drive Operation .......210
Four-Way Hazard Flasher .........258
Freeing A Stuck Vehicle ..........210
Front Axle (Differential) ..........284
Fuel .....................240
Additives .................241
Conserving ...............171
Diesel ..................242
Filler Cap (Gas Cap) ........242,244
Gasoline .................240
Gauge ..................162
Light ...................169
Octane Rating ..............240
Requirements ..............297
Saver Mode ...............171
Tank Capacity ..............297
Fuel System Caution ............243
Fuses ....................290
338