2020 JEEP CHEROKEE ignition

GETTING TO KNOW YOUR INSTRUMENT PANEL
68
ously with the engine running, a malfunction
has been detected in the ESC system. If this
warning light remains on after several igni-
tion cycles, and the vehicle has been driven
several miles (kilometers) at speeds greater
than 30 mph (48 km/h), see an authorized
dealer as soon as possible to have the
problem diagnosed and corrected.
The “ESC OFF Indicator Light” and the
“ESC Indicator Light” come on momen -
tarily each time the ignition is placed in
the ON/RUN or ACC/ON/RUN position.
The ESC system will make buzzing or
clicking sounds when it is active. This is
normal; the sounds will stop when ESC
system becomes inactive.
This light will come on when the vehicle is
in an ESC event.
— Electronic Stability Control (ESC) OFF
Warning Light — If Equipped
This warning light indicates the Electronic
Stability Control (ESC) is off.
Each time the ignition is turned to ON/RUN
or ACC/ON/RUN, the ESC system will be on,
even if it was turned off previously.
— Low Fuel Warning Light
When the fuel level reaches approximately 2
gal (7.5 L) this light will turn on, and remain
on until fuel is added.
A single warning chime will sound with Low
Fuel Warning.
— Low Washer Fluid Warning Light — If
Equipped
This warning light will illuminate when the
windshield washer fluid is low.
— Service LaneSense Warning Light — If
Equipped
This warning light will illuminate when the
LaneSense system is not operating and
requires service. Please see an authorized
dealer.
— LaneSense Warning Light — If
Equipped

The LaneSense Warning Light will be solid
yellow when the vehicle is approaching a lane
marker. The warning light will flash when the
vehicle is crossing the lane marker.
Refer to “LaneSense — If Equipped" in
“Starting And Operating” for further informa
-
tion.
— Engine Check/Malfunction Indicator
Warning Light (MIL)
The Engine Check/Malfunction Indicator
Light (MIL) is a part of an Onboard Diag -
nostic System called OBD II that monitors
engine and automatic transmission control
systems. This warning light will illuminate
when the ignition is in the ON/RUN position
before engine start. If the bulb does not
come on when turning the ignition switch
from OFF to ON/RUN, have the condition
checked promptly.
Certain conditions, such as a loose or
missing gas cap, poor quality fuel, etc., may
illuminate the light after engine start. The
vehicle should be serviced if the light stays
on through several typical driving styles. In
most situations, the vehicle will drive
normally and will not require towing.
When the engine is running, the Malfunction
Indicator Light (MIL) may flash to alert
serious conditions that could lead to imme -
diate loss of power or severe catalytic
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77
Anti-Lock Brake Warning Light
The yellow “Anti-Lock Brake Warning Light”
will turn on when the ignition is cycled to the
ON/RUN mode and may stay on for as long
as four seconds.
If the “Anti-Lock Brake Warning Light”
remains on or comes on while driving, it indi-
cates that the anti-lock portion of the brake
system is not functioning and that service is
required. However, the conventional brake
system will continue to operate normally if
the “Anti-Lock Brake Warning Light” is on.
If the “Anti-Lock Brake Warning Light” is on,
the brake system should be serviced as soon
as possible to restore the benefits of
anti-lock brakes. If the “Anti-Lock Brake
Warning Light” does not come on when the
ignition is cycled to the ON/RUN mode, have
the light repaired as soon as possible.
Electronic Brake Control (EBC) System

Your vehicle is equipped with an advanced
Electronic Brake Control (EBC) system. This
system includes Electronic Brake Force Distri -
bution (EBD), Anti-Lock Brake System (ABS),
Brake Assist System (BAS), Hill Start Assist
(HSA), Traction Control System (TCS), Elec-
tronic Stability Control (ESC), and Electronic Roll Mitigation (ERM). These systems work
together to enhance both vehicle stability and
control in various driving conditions.

Your vehicle may also be equipped with
Trailer Sway Control (TSC), Ready Alert
Braking (RAB), Rain Brake Support (RBS),
Dynamic Steering Torque (DST), Hill
Descent Control (HDC), and Selec-Speed
Control (SSC).
Brake System Warning Light
The red “Brake System Warning Light” will
turn on when the ignition is placed in the
ON/RUN mode and may stay on for as long
as four seconds.
If the “Brake System Warning Light”
remains on or comes on while driving, it indi
-
cates that the brake system is not func -
tioning properly and that immediate service
is required. If the “Brake System Warning
Light” does not come on when the ignition is
turned to the ON/RUN mode, have the light
repaired as soon as possible.
Brake Assist System (BAS)
The Brake Assist System (BAS) is designed
to optimize the vehicle’s braking capability
during emergency braking maneuvers. The system detects an emergency braking situa
-
tion by sensing the rate and amount of brake
application and then applies optimum pres -
sure to the brakes. This can help reduce
braking distances. The BAS complements
the Anti-Lock Brake System (ABS). Applying
the brakes very quickly results in the best
BAS assistance. To receive the benefit of the
system, you must apply continuous braking
pressure during the stopping sequence, (do
not “pump” the brakes). Do not reduce brake
pedal pressure unless braking is no longer
desired. Once the brake pedal is released,
the BAS is deactivated.
WARNING!
The Brake Assist System (BAS) cannot
prevent the natural laws of physics from
acting on the vehicle, nor can it increase
the traction afforded by prevailing road
conditions. BAS cannot prevent collisions,
including those resulting from excessive
speed in turns, driving on very slippery
surfaces, or hydroplaning. The capabilities
of a BAS-equipped vehicle must never be
exploited in a reckless or dangerous
manner, which could jeopardize the user's
safety or the safety of others.
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81
ESC Activation/Malfunction Indicator Light
And ESC OFF Indicator Light

The “ESC Activation/Malfunction
Indicator Light” in the instrument
cluster will come on when the ignition
is turned to the ON mode. It should
turn off with the engine running. If the “ESC
Activation/Malfunction Indicator Light” comes
on continuously with the engine running, a
malfunction has been detected in the ESC
system. If this light remains on after several
ignition cycles, and the vehicle has been driven
several miles (kilometers) at speeds greater than
30 mph (48 km/h), see an authorized dealer as
soon as possible to have the problem diagnosed
and corrected.
The “ESC Activation/Malfunction Indicator
Light” (located in the instrument cluster)
starts to flash as soon as the tires lose trac
-
tion and the ESC system becomes active.
The “ESC Activation/Malfunction Indicator
Light” also flashes when TCS is active. If the
“ESC Activation/Malfunction Indicator
Light” begins to flash during acceleration,
ease up on the accelerator and apply as little
throttle as possible. Be sure to adapt your
speed and driving to the prevailing road
conditions.
NOTE:
The “ESC Activation/Malfunction Indi -
cator Light” and the “ESC OFF Indicator
Light” come on momentarily each time
the ignition is turned ON.
Each time the ignition is turned ON, the
ESC system will be on even if it was turned
off previously.
The ESC system will make buzzing or
clicking sounds when it is active. This is
normal; the sounds will stop when ESC
becomes inactive following the maneuver
that caused the ESC activation. The “ESC OFF Indicator Light”
indicates the customer has elected
to have the Electronic Stability
Control (ESC) in a reduced mode.
Hill Start Assist (HSA)

The Hill Start Assist (HSA) system is designed
to mitigate roll back from a complete stop while
on an incline. If the driver releases the brake
while stopped on an incline, HSA will continue
to hold the brake pressure for a short period. If
the driver does not apply the throttle before this
time expires, the system will release brake
pressure and the vehicle will roll down the hill
as normal.

The following conditions must be met in
order for HSA to activate:
The feature must be enabled.
The vehicle must be stopped.
The park brake must be off.
The driver door must be closed.
The vehicle must be on a sufficient grade.
The Electronic Stability Control (ESC)
cannot prevent the natural laws of
physics from acting on the vehicle, nor
can it increase the traction afforded by
prevailing road conditions. ESC cannot
prevent all accidents, including those
resulting from excessive speed in turns,
driving on very slippery surfaces, or
hydroplaning. ESC also cannot prevent
collisions.
WARNING! (Continued)
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SAFETY
82
The gear selection must match vehicle
uphill direction (i.e., vehicle facing uphill
is in forward gear; vehicle backing uphill is
in REVERSE (R) gear).
HSA will work in REVERSE gear and all
forward gears. The system will not activate
if the transmission is in PARK (P) or
NEUTRAL (N). For vehicles equipped with
a manual transmission, if the clutch is
pressed, HSA will remain active.
Disabling And Enabling HSA
This feature can be turned on or turned off.
To change the current setting, proceed as
follows:
If disabling HSA using your instrument
cluster display, refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further information.
If disabling HSA using Uconnect Settings,
refer to “Uconnect Settings” in “Multi-
media” for further information.
For vehicles not equipped with an instru -
ment cluster display, perform the following
steps:
1. Center the steering wheel (front wheels pointing straight forward)
2. Shift the transmission into PARK (P)
3. Apply the park brake
4. Start the engine 5. Rotate the steering wheel slightly more
than one-half turn to the left
6. Push the “ESC OFF” button located in the lower switch bank below the climate
control four times within 20 seconds.
The “ESC Off Indicator Light” should
turn on and turn off two times
7. Rotate the steering wheel back to center and then an additional slightly more than
one-half turn to the right
8. Turn the ignition to the OFF mode and then back to ON. If the sequence was
completed properly, the “ESC Off Indi -
cator Light” will blink several times to
confirm HSA is disabled
9. Repeat these steps if you want to return this feature to its previous setting
WARNING!
There may be situations where the Hill
Start Assist (HSA) will not activate and
slight rolling may occur, such as on minor
hills or with a loaded vehicle, or while
pulling a trailer. HSA is not a substitute for
active driving involvement. It is always the
driver’s responsibility to be attentive to
distance to other vehicles, people, and
objects, and most importantly brake
operation to ensure safe operation of the
vehicle under all road conditions. Your
complete attention is always required
while driving to maintain safe control of
your vehicle. Failure to follow these
warnings can result in a collision or serious
personal injury.
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SAFETY
92
NOTE:
When the FCW is “on”, this allows the
system to warn the driver of a possible
collision with the vehicle in front.
When the FCW is “off”, this prevents the
system from warning the driver of a
possible collision with the vehicle in front.
If the FCW is set to “off”, “FCW OFF" will
be displayed in the instrument cluster
display.
When FCW status is set to “Only
Warning”, this prevents the system from
providing limited active braking, or addi-
tional brake support if the driver is not
braking adequately in the event of a poten -
tial frontal collision.
When FCW status is set to “Warning and
Braking”, this allows the system to warn
the driver of a possible collision with the
vehicle in front using audible/visual warn -
ings and it applies autonomous braking.
The system will retain the last setting
selected by the driver after ignition shut -
down.
FCW Braking Status And Sensitivity
The FCW Sensitivity and Active Braking
status are programmable through the Ucon -
nect System. Refer to “Uconnect Settings”
in “Multimedia” in the Owner’s Manual for
further information.
Far
When the sensitivity of FCW is set to the “Far” setting and the system
status is “Only Warning”, this allows
the system to warn the driver of apossible more distant collisions with
the vehicle in front using audible/ visual warnings.
More cautious drivers that do not mindfrequent warnings may prefer this setting.
Medium
When the sensitivity of FCW is set to the “Medium” setting and the system
status is “Only Warning”, this allows
the system to warn the driver of apossible collision with the vehicle in
front using audible/visual warnings.
Near
When the sensitivity of FCW is set to the “Near” setting and the system
status is “Only Warning”, this allows
the system to warn the driver of apossible closer collisions with the
vehicle in front using audible/visual
warnings.
This setting provides less reaction time than the “Far” and “Medium”
settings, which allows for a moredynamic driving experience.
More dynamic or aggressive drivers that want to avoid frequent warnings may prefer this setting.
FCW Limited Warning
If the instrument cluster display reads “ACC/
FCW Limited Functionality” or “ACC/FCW
Limited Functionality Clean Front Wind -
shield” momentarily, there may be a condi -
tion that limits FCW functionality. Although
the vehicle is still driveable under normal
conditions, the active braking may not be
fully available. Once the condition that
li
mited the system performance is no longer
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93
present, the system will return to its full
performance state. If the problem persists,
see an authorized dealer.
Service FCW Warning
If the system turns off, and the instrument
cluster display reads:
ACC/FCW Unavailable Service Required
Cruise/FCW Unavailable Service Required
This indicates there is an internal system
fault. Although the vehicle is still driveable
under normal conditions, have the system
checked by an authorized dealer.
Pedestrian Emergency Braking (PEB) — If
Equipped
Pedestrian Emergency Braking (PEB) is a
sub-system of the FCW system which
provides the driver with audible and visual
warnings in the instrument cluster display,
and may apply automatic braking when it
detects a potential frontal collision with a
pedestrian.
If a PEB event begins at a speed below
37 mph (60 km/h), the system may provide
braking to mitigate the potential collision
with a pedestrian. If the PEB event stops the vehicle completely, the system will hold the
vehicle at a standstill for two seconds and
then release the brakes. When the system
determines a collision with the pedestrian in
front of you is no longer probable, the
warning message will be deactivated.
The minimum speed for PEB activation is
3 mph (5 km/h).
Turning PEB On Or Off
NOTE:
The default status of PEB is “On.” This
allows the system to warn you of a possible
frontal collision with the pedestrian.
The PEB button is located in the Uconnect
display in the Controls settings. Refer to
“Uconnect Settings” in “Multimedia” in the
Owner’s Manual for further information.
To turn the PEB system off, push the
“Pedestrian Emergency Braking” button
once.
To turn the PEB system back on, push the
“Pedestrian Emergency Braking” button
again.
Changing the PEB status to “Off” deacti
-
vates the system, so no warning or active
braking will be available in case of a possible
frontal collision with the pedestrian.
NOTE:
The PEB system will NOT retain the last
setting selected by the driver after ignition
shut down. The system will reset to the
default setting when the vehicle is restarted.
Tire Pressure Monitoring System (TPMS)
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure
based on the vehicle recommended cold
placard pressure.
NOTE:
The system only warns the tire pressure is
low: it is not able to inflate them.
WARNING!
Pedestrian Emergency Braking (PEB) is
not intended to avoid a collision on its
own, nor can PEB detect every type of
potential collision with a pedestrian. The
driver has the responsibility to avoid a
collision by controlling the vehicle via
braking and steering. Failure to follow this
warning could lead to serious injury or
death.
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96
Tire Pressure Monitoring Low Pressure Warning

Should this occur, you should stop as soon as
possible and inflate the tires with low pres -
sure (those in a different color in the instru -
ment cluster graphic) to the vehicle’s
recommended cold placard pressure value.
Once the system receives the updated tire
pressures, the system will automatically
update, the pressure values in the graphic
display in the instrument cluster will return to
their original color, and the “Tire Pressure
Monitoring Warning Light” will turn off. The
vehicle may need to be driven for up to
10 minutes above 15 mph (24 km/h) in order
for the TPMS to receive this information.
NOTE:
When filling warm tires, the tire pressure
may need to be increased up to an additional
5 psi (35 kPa) above the recommended cold
placard pressure in order to turn the Tire
Pressure Monitoring Warning Light off.
Service TPMS Warning
When a system fault is detected, the “Tire
Pressure Monitoring Warning Light” will
flash on and off for 75 seconds and then
remain on solid. The system fault will also
sound a chime. In addition, the instrument
cluster will display a "SERVICE TPM
SYSTEM" message for a minimum of five
seconds and then display dashes (- -) in
place of the pressure value to indicate which
sensor is not being received.
If the ignition key is cycled, this sequence
will repeat, providing the system fault still
exists. If the system fault no longer exists,
the “Tire Pressure Monitoring Warning
Light” will no longer flash, and the
“SERVICE TPM SYSTEM” message will no
longer display, and a pressure value will
display in place of the dashes. A system fault
can occur due to any of the following:
Jamming due to electronic devices or
driving next to facilities emitting the same
radio frequencies as the TPMS sensors.
Installing some form of aftermarket
window tinting that affects radio wave
signals.
Lots of snow or ice around the wheels or
wheel housings.
Using tire chains on the vehicle.
Using wheels/tires not equipped with
TPMS sensors.
Vehicles With Compact Spare or Non-Matching
Full Size Spare
1. The compact spare tire or non-matching full size does not have a tire pressure
monitoring sensor. Therefore, the TPMS
will not monitor the pressure in the
compact spare tire.
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97
2. If you install the compact ornon-matching full size spare tire in place
of a road tire that has a pressure below
the low-pressure warning limit, upon the
next ignition key cycle, the “TPMS
Warning Light” will remain on and a
chime will sound. In addition, the
graphic in the instrument cluster will still
display a different color pressure value.
3. After driving the vehicle for up to 10 minutes above 15 mph (24 km/h),
the “TPMS Warning Light” will flash on
and off for 75 seconds and then remain
on solid. In addition, the instrument
cluster will display a “Service Tire Pres -
sure System” message for five seconds
and then display dashes (- -) in place of
the pressure value.
4. For each subsequent ignition key cycle, a chime will sound, the “TPMS Warning0
Light” will flash on and off for 75
seconds and then remain on solid, and
the instrument cluster will display a
“SERVICE TPM SYSTEM” message for
five seconds and then display dashes (- -)
in place of the pressure value. 5. Once you repair or replace the original
road tire and reinstall it on the vehicle
in place of the compact spare or
non-matching full size, the TPMS will
update automatically. In addition, the
“TPMS Warning Light” will turn off and
the graphic in the instrument cluster
will display a new pressure value
instead of dashes (- -), as long as no
tire pressure is below the low-pressure
warning limit in any of the four active
road tires. The vehicle may need to be
driven for up to 10 minutes above
15 mph (24 km/h) in order for the
TPMS to receive this information.
TPMS Deactivation — If Equipped
The TPMS can be deactivated if replacing all
four wheel and tire assemblies (road tires)
with wheel and tire assemblies that do not
have TPMS Sensors, such as when installing
winter wheel and tire assemblies on your
vehicle.
To deactivate the TPMS, first replace all
four wheel and tire assemblies (road tires)
with tires not equipped with Tire Pressure
Monitoring (TPM) sensors. Then, drive the
vehicle for 10 minutes above 15 mph
(24 km/h). The TPMS will chime, the "TPM Telltale Light" will flash on and off for 75
seconds and then remain on. The instru
-
ment cluster will display the “SERVICE
TPM SYSTEM” message and then display
dashes (--) in place of the pressure values.
Beginning with the next ignition cycle, the
TPMS will no longer chime or display the
“SERVICE TPM SYSTEM” message in the
instrument cluster but dashes (--) will
remain in place of the pressure values.
To reactivate the TPMS, replace all four
wheel and tire assemblies (road tires) with
tires equipped with TPM sensors. Then, drive
the vehicle for up to 10 minutes above
15 mph (24 km/h). The TPMS will chime,
the "TPM Telltale Light" will flash on and off
for 75 seconds and then turn off. The instru -
ment cluster will display the “SERVICE TPM
SYSTEM” message and then display pres -
sure values in place of the dashes. On the
next ignition cycle the "SERVICE TPM
SYSTEM" message will no longer be
displayed as long as no system fault exists.
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