2009 JEEP GRAND CHEROKEE park assist

▫To Resume Speed.................... 146
▫To Vary The Speed Setting.............. 146
▫To Accelerate For Passing.............. 147
Rear Park Assist — If Equipped........... 147
▫Rear Park Assist Sensors............... 147
▫Rear Park Assist Warning Display........ 148
▫Enable/Disable The Rear Park Assist...... 150
▫Service The Rear Park Assist............ 150
▫Cleaning The Rear Park Assist........... 151
Rear Camera — If Equipped.............. 151
▫Turning The Rear Camera On Or Off — With
Navigation Radio.................... 152
▫Turning The Rear Camera On Or Off —
Without Navigation Radio.............. 152Overhead Console..................... 153
▫Courtesy/Reading Lights.............. 153
▫Sunglasses Storage................... 154
Garage Door Opener — If Equipped........ 154
▫Programming HomeLink.............. 155
▫Gate Operator/Canadian Programming.... 158
▫Using HomeLink................... 158
▫Reprogramming A Single
HomeLinkButton................... 159
▫Security........................... 159
▫Troubleshooting Tips.................. 159
▫General Information.................. 160
Power Sunroof — If Equipped............ 160
76 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

To Accelerate For Passing
Press the accelerator as you would normally. When the
pedal is released, the vehicle will return to the set speed.
Using Electronic Speed Control On Hills
The transmission may downshift on hills to maintain the
vehicle set speed.
NOTE:The Electronic Speed Control system maintains
speed up and down hills. A slight speed change on
moderate hills is normal.
On steep hills, a greater speed loss or gain may occur so
it may be preferable to drive without Electronic Speed
Control.
REAR PARK ASSIST — IF EQUIPPED
The Rear Park Assist provides visible and audible indi-
cations of the distance between the rear fascia and the
detected obstacle when backing up. Refer to the WarningSection and Note Section for limitations of this system
and recommendations.
The Rear Park Assist will remember the last system state
(enabled or disabled) from the last ignition cycle when
the ignition is changed to the ON position.
The Rear Park Assist can be active only when the shift
lever is in REVERSE. If the Rear Park Assist is enabled at
this shift lever position, the system will be active until the
vehicle speed is increased to approximately 11 mph
(18 km/h) or above. The system will be active again if the
vehicle speed is decreased to speeds less than approxi-
mately 10 mph (16 km/h).
Rear Park Assist Sensors
The four Rear Park Assist Sensors, located in the rear
fascia, monitor the area behind the vehicle that is within
the sensors’ field of view.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 147
3

The sensors can detect obstacles from approximately 12
to 59 in (30 to 150 cm) from the rear fascia in the
horizontal direction, depending on the location and
orientation of the obstacle and the type of obstacle.
Rear Park Assist Warning Display
The Rear Park Assist Warning Display, located in the
headliner near the flipper glass, provides both visible and
audible warnings to indicate the distance between the
rear fascia and the detected obstacle.
When the ignition is turned to the ON position, the
warning display will turn ON all of its LEDs for about
one second. Each side of the warning display has six
yellow and two red LEDs. The vehicle is close to the
obstacle when the red LED is ON.
148 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

The system dimly illuminates the two outer most yellow
LEDs when it is ON and detecting no obstacles. The
following chart shows the warning display operation
when the system is detecting an obstacle:
WARNING DISPLAY DISTANCES
DISPLAY LED OBSTACLE DISTANCE FROM: LED COLOR AUDIBLE SIGNAL
REAR CORNERS REAR CENTER
1st LED 59 in (150 cm) Yellow Yes, Half Second
2nd LED 51 in (130 cm) Yellow None
3rd LED 45 in (115 cm) Yellow None
4th LED 31.5 in (80 cm) 39 in (100 cm) Yellow None
5th LED 25.5 in (65 cm) 33.5 in (85 cm) Yellow None
6th LED 20 in (50 cm) 28 in (70 cm) Yellow None
7th LED 16 in (40 cm) 20 in (50 cm) Red Yes, Intermittent
8th LED 6 in (15 cm) 12 in (30 cm) Red Yes, Continuous
NOTE:The Rear Park Assist system will MUTE the
radio, if on, when the system is sounding an audio tone.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 149
3

Enable/Disable The Rear Park Assist
The Rear Park Assist can be enabled and disabled with a
switch located on the upper switch bank of the instru-
ment panel.When the switch is pressed to disable the system, the
instrument cluster will display the “PARK ASSIST DIS-
ABLED” message. Refer to “Electronic Vehicle Informa-
tion Center (EVIC)” in Section 4 of this manual. When the
shift lever is changed to REVERSE and the system is
disabled, the instrument cluster will actuate a single
chime, once per ignition cycle, and it will display the
message.
The Rear Park Assist Switch LED will be ON when the
Rear Park Assist is disabled or defective. The Rear Park
Assist Switch LED will be OFF when the system is
enabled.
Service The Rear Park Assist
When the Rear Park Assist is defective, the instrument
cluster will actuate a single chime, once per ignition
cycle, and it will display the “SERVICE PARK ASSIST
SYSTEM” message. Refer to “Electronic Vehicle Informa-
tion Center (EVIC)” in Section 4 of this manual.
Rear Park Assist Switch
150 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Cleaning The Rear Park Assist
Clean the Rear Park Assist Sensors with water, car wash
soap and a soft cloth. Do not use rough or hard cloths. Do
not scratch or poke the sensors. Otherwise, you could
damage the sensors.
REAR CAMERA — IF EQUIPPED
Vehicles with a uconnecttunes radio may be equipped
with a rearview camera (located on the rear liftgate) that
allows you to see an on-screen image (on the navigation
radio screen) of the rear of your vehicle, whenever the
vehicle is put into REVERSE.
WARNING!
Drivers must be careful when backing up even when
using the Rear Camera System. Always check care-
fully behind your vehicle, and be sure to check for
pedestrians, animals, other vehicles, obstructions, or
blind spots before backing up. You are responsible
for the safety of your surroundings and must con-
tinue to pay attention while backing up. Failure to do
so can result in serious injury or death.
CAUTION!
•To avoid vehicle damage, the Rear Camera system
should only be used as a parking aid. The Rear
Camera system is unable to view every obstacle or
object in your drive path.
(Continued)
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 151
3

•LIFTGATE/HOOD OPEN (with graphic)
•HOOD/GLASS/DOOR OPEN (with graphic)
•HOOD/GLASS/DOORS OPEN (with graphic)
•HOOD/GATE/DOOR OPEN (with graphic)
•HOOD/GATE/DOORS OPEN (with graphic)
•LIFTGLASS/DOOR OPEN (with graphic)
•LIFTGLASS/DOORS OPEN (with graphic)
•LIFTGLASS/HOOD OPEN (with graphic)
•WASHER FLUID LOW (with graphic)
•COOLANT LOW (with graphic)
•OIL CHANGE REQUIRED
•OIL CHANGE RESET
•CHECK GAUGES
•AUTO HIGH BEAMS ON
•AUTO HIGH BEAMS OFF
•PARK ASSIST DISABLED
•SERVICE SUSPENSION
•SERVICE PARK ASSIST SYSTEM
•TRANSMISSION OVER TEMP
•CHECK SHIFT PROCEDURE
•SERVICE 4WD SYSTEM
•4WD SYSTEM IN NEUTRAL
•LOW BRAKE FLUID LEVEL
•WARNING! LIMIT SPEED
•CHECK GASCAP
•ESP OFF
196 UNDERSTANDING YOUR INSTRUMENT PANEL

▫Quadra-Trac IIOperating
Instructions/Precautions — If Equipped.... 297
▫Shift Positions...................... 298
▫Shifting Procedures................... 298
▫Quadra-Drive IISystem — If Equipped.... 301
On-Road Driving Tips.................. 301
Off-Road Driving Tips.................. 302
▫When To Use 4WD Low Range — If
Equipped.......................... 302
▫Driving Through Water................ 302
▫Driving In Snow, Mud And Sand......... 303
▫Hill Climbing....................... 304
▫Traction Downhill.................... 305
▫After Driving Off-Road................ 305Power Steering....................... 306
▫Power Steering Fluid Check............. 307
Parking Brake........................ 308
Anti-Lock Brake System................. 309
Electronic Brake Control System........... 312
▫ABS (Anti-Lock Brake System)........... 312
▫TCS (Traction Control System)........... 313
▫BAS (Brake Assist System).............. 313
▫ERM (Electronic Roll Mitigation)......... 314
▫ESP (Electronic Stability Program)........ 315
▫TSC (Trailer Sway Control)............. 320
▫HSA (Hill Start Assist) (4WD Models With
NV245 Two–Speed Transfer Case Only)..... 320
276 STARTING AND OPERATING