2008 JEEP GRAND CHEROKEE park assist

NTCS (Traction Control System)............135
NBAS (Brake Assist System)...............136
NERM (Electronic Roll Mitigation)..........137
NESP (Electronic Stability Program).........138
NTSC (Trailer Sway Control)..............140
NESP/BAS Warning Lamp And ESP/TCS
Indicator Light.......................141
mRear Park Assist SystemÐ If Equipped.......142
NRear Park Assist Sensors................142
NRear Park Assist Warning Display.........143
NEnable/Disable The Rear Park Assist System . . 145
NService The Rear Park Assist System........145
NCleaning The Rear Park Assist System......146mRear Camera Ð If Equipped...............146
NTurning The Rear Camera On............146
NTurning The Rear Camera Off............147
mOverhead Console......................147
NCourtesy/Reading Lights................148
NSunglasses Storage....................148
mGarage Door Opener Ð If Equipped.........148
NProgramming HomeLinkt...............149
NGate Operator/Canadian Programming.....152
NUsing HomeLinkt.....................153
NReprogramming a Single HomeLinktButton . . 153
NSecurity............................153
NTroubleshooting Tips...................154
72 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

²The ESP Control System will make buzzing or clicking
sounds when it is active. This is normal; the sounds
will stop when ESP becomes inactive following the
maneuver that caused the ESP activation.
REAR PARK ASSIST SYSTEMÐ IF EQUIPPED
The Rear Park Assist System provides visual and audible
indications of the distance between the rear fascia and the
detected obstacle when backing up. Refer to the Warning
Section and Note Section for limitations of this system
and recommendations.
The Rear Park Assist System 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 System can be active only when the
shifter is in R (Reverse). If the Rear Park Assist System is
enabled at this shifter 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
approximately 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. The monitored area seems oval
in shape.
The sensors can detect obstacles from approximately 11.8
inches (30 cm) up to 59 inches (150 cm) from the rear
fascia in the horizontal direction, depending on the
location and orientation of the obstacle and the type of
obstacle.
142 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Rear Park Assist Warning Display
The Rear Park Assist Warning Display, located in the
headliner near the flipper glass, provides both visual and
audible warnings to indicate the distance between the
rear fascia and the detected obstacle.When the ignition is changed to the ON position, the
warning display will turn ON all of its LEDs for about 1
second. Each side of the warning display has 6 yellow
and 2 red LEDs. The vehicle is close to the obstacle when
the red LED is ON.
The system dimly illuminates the two outer most yellow
LED's when it is ON and detecting no obstacles. The
following chart shows the warning display operation
when the system is detecting an obstacle:
Rear Park Assist Display
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 143
3

WARNING DISPLAY DISTANCES
DISPLAY LED OBSTACLE DISTANCE FROM: LED COLOR AUDIBLE SIGNAL
REAR CORNERS REAR CENTER
1st LED 59 in. (150 cm) Yellow None
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.
144 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Enable/Disable the Rear Park Assist System
The Rear Park Assist System can be enabled and disabled
with a switch located on the upper switch bank of the
instrument panel.When the switch is pressed to disable the system, the
instrument cluster will display the9PARK ASSIST DIS-
ABLED9message. Refer to ªElectronic Vehicle Informa-
tion Center (EVIC)º in Section 4 of this manual. When the
shifter is changed to R (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 System is disabled or defective. The
Rear Park Assist Switch LED will be OFF when the
system is enabled.
Service the Rear Park Assist System
When the Rear Park Assist System is defective, the
instrument cluster will actuate a single chime, once per
ignition cycle, and it will display the9SERVICE PARK
ASSIST SYSTEM9message. Refer to ªElectronic Vehicle
Information Center (EVIC)º in Section 4 of this manual.
Rear Park Assist Switch
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 145
3

Cleaning the Rear Park Assist System
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 Ð IF EQUIPPED
Vehicles with a Navigation radio may be equipped with
a rear view 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 R (Reverse).
WARNING!
Drivers must be careful when backing up even when
using the rear camera system. Always check carefully
behind your vehicle, and be sure to check for pedes-
trians, animals, other vehicles, obstructions, or blind
spots before backing up. Failure to do so can result in
serious injury or death.
If snow, ice, mud, or anything else builds up on the
camera lens. Clean the lens, rinse with water, and dry
with a soft cloth.
Turning the Rear Camera On
1. To access the rear camera mode, select ªRear Cameraº
at the Systems Settings screen and press ENTER. Refer to
your ªNavigation User's Manualº for detailed operating
instructions.
146 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

²AUTO HIGH BEAMS ON
²AUTO HIGH BEAMS OFF
²PARK ASSIST DISABLED
²SERVICE SUSPENSION
²SERVICE PARK ASSIST SYSTEM
²TRANSMISSION OVER TEMP
²LOW BRAKE FLUID LEVEL
²WARNING! LIMIT SPEED
²CHECK GASCAP
²ESP OFF
²IOD FUSE OUT
²MEMORY #1 POSITIONS SET
²MEMORY #2 POSITIONS SET
²MEMORY SYSTEM DISABLED Ð SEATBELT BUCK-
LED (with graphic)
²MEMORY SYSTEM DISABLED Ð VEHICLE NOT IN
PARK
²DRIVER 1 MEMORY
²DRIVER 2 MEMORY
²ADJ. PEDALS DISABLED Ð CRUISE CONTROL SET
²ADJ. PEDALS DISABLED Ð SHIFTER IN REVERSE
²TIRE LOW PRESSURE
²CHECK TPM SYSTEM
²LEFT FRONT LOW PRESSURE (Premium TPM Sys-
tem Only)
²RIGHT FRONT LOW PRESSURE (Premium TPM Sys-
tem Only)
UNDERSTANDING YOUR INSTRUMENT PANEL 185
4

POWER STEERING
The standard power steering system will give you good
vehicle response and increased ease of maneuverability
in tight spaces. The system will provide mechanical
steering capability if power assist is lost.
If for some reason the power assist is interrupted, it will
still be possible to steer your vehicle. Under these condi-
tions, you will observe a substantial increase in steering
effort, especially at very low vehicle speeds and during
parking maneuvers.
NOTE:Increased noise levels at the end of the steering
wheel travel are considered normal and do not indicate
that there is a problem with the power steering system.
Upon initial start-up in cold weather, the power steering
pump may make noise for a short amount of time. This is
due to the cold, thick fluid in the steering system. This
noise should be considered normal, and it does not in any
way damage the steering system.WARNING!
Continued operation with reduced power steering
assist could pose a safety risk to yourself and others.
Service should be obtained as soon as possible.
CAUTION!
Prolonged operation of the steering system at the end
of the steering wheel travel will increase the steering
fluid temperature and it should be avoided when
possible. Damage to the power steering pump may
occur.
258 STARTING AND OPERATING