2015 JEEP CHEROKEE Braking system

Changing FCW And Active Braking Status
The FCW Sensitivity And Active Braking Settings are
programmable through the Uconnect® System. Refer to
“Uconnect® Settings” in “Understanding Your Instru-
ment Panel” for further information.
The default status of FCW is the “Far” setting and the
Active Braking is the “On” setting, this allows the system
to warn you of a possible collision with the vehicle in
front of you when you are farther away and it applies
limited braking. This gives you the most reaction time to
avoid a possible collision.
Changing the FCW status to the “Near” setting, allows
the system to warn you of a possible collision with the
vehicle in front of you when you are much closer. This
setting provides less reaction time than the “Far” setting,
which allows for a more dynamic driving experience.
NOTE:
•The system will retain the last setting selected by the
driver after ignition shut down.
•FCW may not react to irrelevant objects such as
overhead objects, ground reflections, objects not in the
path of the car, stationary objects that are far away,
oncoming traffic, or leading vehicles with the same or
higher rate of speed.
•FCW will be disabled like ACC, with the unavailable
screens.
FCW Limited Warning
If the system turns off, and the EVIC/DID displays
“ACC/FCW Limited Functionality” or “ACC/FCW Lim-
ited Functionality Clean Front Windshield” momentarily,
there may be a condition that limits FCW functionality.
Although the vehicle is still drivable under normal
conditions, the active braking may not be fully available.
222 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

WARNING!(Continued)
•Before using ParkSense®, it is strongly recom-
mended that the ball mount and hitch ball assem-
bly is disconnected from the vehicle when the
vehicle is not used for towing. Failure to do so can
result in injury or damage to vehicles or obstacles
because the hitch ball will be much closer to the
obstacle than the rear fascia when the loudspeaker
sounds the continuous tone. Also, the sensors
could detect the ball mount and hitch ball assem-
bly, depending on its size and shape, giving a false
indication that an obstacle is behind the vehicle.
PARKSENSE® FRONT AND REAR PARK ASSIST
— IF EQUIPPED
The ParkSense® Park Assist system provides visual and
audible indications of the distance between the rear
and/or front fascia and a detected obstacle when backing
up or moving forward, e.g. during a parking maneuver.
If your vehicle is equipped with an Automatic Transmis-
sion, the vehicle brakes may be automatically applied
and released when performing a reverse parking maneu-
ver if the system detects a possible collision with an
obstacle.
NOTE:
•The driver can override the automatic braking func-
tion by pressing the gas pedal, turning ParkSense® off
via ParkSense® switch, or changing the gear while the
automatic brakes are being applied.
•Automatic brakes will not be available if ESC is not
available.
•Automatic brakes will not be available if there is a
faulted condition detected with the ParkSense® Park
Assist system or the Braking System Module.
244 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

•The automatic braking function may only be applied if
the vehicle deceleration is not enough to avoid collid-
ing with a detected obstacle.
•The automatic braking function may not be applied
fast enough for obstacles that move toward the rear of
the vehicle from the left and/or right sides.
•The automatic braking function can be enabled/
disabled from the Customer-Programmable Features
section of the Uconnect® System.
•ParkSense® will retain its last known configuration
state for the automatic braking function through igni-
tion cycles.
The automatic braking function is intended to assist the
driver in avoiding possible collisions with detected ob-
stacles when backing up in REVERSE gear.
If your vehicle is equipped with a Manual Transmission,
the automatic braking function in REVERSE gear is not
available.
NOTE:
•The driver is always responsible for controlling the
vehicle.
•The system is provided to assist the driver and not to
substitute the driver.
•The driver must stay in full control of the vehicle’s
acceleration and braking and is responsible for the
vehicle’s movements.
Refer to ParkSense® System Usage Precautions for limi-
tations of this system and recommendations.
ParkSense® will retain the last system state (enabled or
disabled) from the last ignition cycle when the ignition is
changed to the ON/RUN position.
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 245

•When you turn ParkSense® off, the instrument cluster
will display “PARKSENSE OFF.” Furthermore, once
you turn ParkSense® off, it remains off until you turn
it on again, even if you cycle the ignition key.
•When you move the shift lever to the REVERSE
position and ParkSense® is turned off, the instrument
cluster will display “PARKSENSE OFF” for as long as
the vehicle is in REVERSE.
•ParkSense®, when on, will reduce the volume of the
radio when it is sounding a tone.
•Clean the ParkSense® sensors regularly, taking care
not to scratch or damage them. The sensors must not
be covered with ice, snow, slush, mud, dirt or debris.
Failure to do so can result in the system not working
properly. The ParkSense® system might not detect an
obstacle behind or in front of the fascia/bumper, or it
could provide a false indication that an obstacle is
behind or in front of the fascia/bumper.
•Use the ParkSense® switch to turn the ParkSense®
system off if objects such as bicycle carriers, trailer
hitches, etc. are placed within 12 in (30 cm) from the
rear fascia/bumper. Failure to do so can result in the
system misinterpreting a close object as a sensor
problem, causing the “PARKSENSE UNAVAILABLE
SERVICE REQUIRED” message to be displayed in the
instrument cluster.
•ParkSense® should be disabled when the liftgate is in
the open position. An opened liftgate could provide a
false indication that an obstacle is behind the vehicle.
•There may be a delay in the object detection rate if the
object is moving. This will cause the automatic braking
application to be delayed.
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 259

To enable the ParkSense® Active Park Assist system,
press the ParkSense® Active Park Assist switch once
(LED turns on).
To disable the ParkSense® Active Park Assist system,
press the ParkSense® Active Park Assist switch again
(LED turns off).
The ParkSense® Active Park Assist system will turn off
automatically for any of the following conditions:
•The parking maneuver is completed.
•Vehicle speed greater than 18 mph (30 km/h) when
searching for a parking space.
•Vehicle speed greater than 5 mph (7 km/h) during
active steering guidance into the parking space.
•Touching the steering wheel during active steering
guidance into the parking space.
•Pressing the ParkSense® Front and Rear Park Assist
switch.
•Driver’s door is opened.
•Rear liftgate is opened.
•Electronic Stability Control/Anti-lock Braking System
intervention.
•The ParkSense® Active Park Assist system will allow a
maximum of six shifts between DRIVE (automatic
transmission) or forward gear (manual transmission)
and REVERSE. If the maneuver cannot be completed
within six shifts, the system will cancel and the EVIC/
DID will instruct the driver to complete the maneuver
manually.
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 263

The dual brake system provides a reserve braking capac-
ity in the event of a failure to a portion of the hydraulic
system. A leak in either half of the dual brake system is
indicated by the Brake Warning Light, which will turn on
when the brake fluid level in the master cylinder has
dropped below a specified level.
The light will remain on until the cause is corrected.
NOTE:The light may flash momentarily during sharp
cornering maneuvers, which change fluid level condi-
tions. The vehicle should have service performed, and
the brake fluid level checked.
If brake failure is indicated, immediate repair is neces-
sary.
WARNING!
Driving a vehicle with the red brake light on is
dangerous. Part of the brake system may have failed.
It will take longer to stop the vehicle. You could have
a collision. Have the vehicle checked immediately.
Vehicles equipped with the Anti-Lock Brake System
(ABS), are also equipped with Electronic Brake Force
Distribution (EBD). In the event of an EBD failure, the
Brake Warning Light will turn on along with the ABS
Light. Immediate repair to the ABS system is required.
Operation of the Brake Warning Light can be checked by
turning the ignition switch from the OFF position to the
ON/RUN position. The light should illuminate for ap-
proximately two seconds. The light should then turn off
unless the parking brake is applied or a brake fault is
detected. If the light does not illuminate, have the light
inspected by an authorized dealer.
332 UNDERSTANDING YOUR INSTRUMENT PANEL

2. Brake Warning Light
This light monitors various brake functions,
including brake fluid level and parking brake
application. If the brake light turns on it may
indicate that the parking brake is applied, that
the brake fluid level is low, or that there is a problem with
the anti-lock brake system reservoir.
If the light remains on when the parking brake has been
disengaged, and the fluid level is at the full mark on the
master cylinder reservoir, it indicates a possible brake
hydraulic system malfunction or that a problem with the
Brake Booster has been detected by the Anti-Lock Brake
System (ABS)/Electronic Stability Control (ESC) system.
In this case, the light will remain on until the condition
has been corrected. If the problem is related to the brake
booster, the ABS pump will run when applying the brake
and a brake pedal pulsation may be felt during each stop.
The dual brake system provides a reserve braking capac-
ity in the event of a failure to a portion of the hydraulic
system. A leak in either half of the dual brake system is
indicated by the Brake Warning Light, which will turn on
when the brake fluid level in the master cylinder has
dropped below a specified level.
The light will remain on until the cause is corrected.
NOTE:The light may flash momentarily during sharp
cornering maneuvers, which change fluid level condi-
tions. The vehicle should have service performed, and
the brake fluid level checked.
If brake failure is indicated, immediate repair is neces-
sary.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 341

The dual brake system provides a reserve braking capac-
ity in the event of a failure to a portion of the hydraulic
system. A leak in either half of the dual brake system is
indicated by the Brake Warning Light, which will turn on
when the brake fluid level in the master cylinder has
dropped below a specified level.
The light will remain on until the cause is corrected.
NOTE:The light may flash momentarily during sharp
cornering maneuvers, which change fluid level condi-
tions. The vehicle should have service performed, and
the brake fluid level checked.
If brake failure is indicated, immediate repair is necessary.
WARNING!
Driving a vehicle with the red brake light on is
dangerous. Part of the brake system may have failed.
(Continued)
WARNING!(Continued)
It will take longer to stop the vehicle. You could have
a collision. Have the vehicle checked immediately.
Vehicles equipped with the Anti-Lock Brake System
(ABS), are also equipped with Electronic Brake Force
Distribution (EBD). In the event of an EBD failure, the
Brake Warning Light will turn on along with the ABS
Light. Immediate repair to the ABS system is required.
Operation of the Brake Warning Light can be checked by
turning the ignition switch from the OFF position to the
ON/RUN position. The light should illuminate for ap-
proximately two seconds. The light should then turn off
unless the parking brake is applied or a brake fault is
detected. If the light does not illuminate, have the light
inspected by an authorized dealer.
364 UNDERSTANDING YOUR INSTRUMENT PANEL