2021 JEEP COMPASS service

65
Service 4WD Warning Light — If Equipped
This warning light will illuminate to
signal a fault with the 4WD system.
If the light stays on or comes on
during driving, it means that the 4WD system
is not functioning properly and that service is
required. We recommend you drive to the
nearest service center and have the vehicle
serviced immediately.
Service Forward Collision Warning (FCW)
Light — If Equipped
This warning light will illuminate to
indicate a fault in the Forward Colli -
sion Warning (FCW) With Mitigation
System. Contact an authorized dealer for
service.
Refer to "Forward Collision Warning (FCW)"
in "Safety" for further information.
Service Stop/Start System Warning Light —
If Equipped
This warning light will illuminate
when the Stop/Start system is not
functioning properly and service is
required. Contact an authorized dealer for
service.
Tire Pressure Monitoring System (TPMS)
Warning Light
The warning light switches on and a
message is displayed to indicate
that the tire pressure is lower than
the recommended value and/or that slow
pressure loss is occurring. In these cases,
optimal tire duration and fuel consumption
may not be guaranteed.
Should one or more tires be in the condition
mentioned above, the display will show the
indications corresponding to each tire. Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recom
-
mended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure
label. If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or tire inflation pressure label, you
should determine the proper tire inflation
pressure for those tires.
As an added safety feature, your vehicle has
been equipped with a Tire Pressure Moni -
toring System (TPMS) that illuminates a low
tire pressure telltale when one or more of
your tires is significantly under-inflated.
Accordingly, when the low tire pressure tell -
tale illuminates, you should stop and check
your tires as soon as possible, and inflate
them to the proper pressure. Driving on a
significantly under-inflated tire causes the
tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the
vehicle’s handling and stopping ability.
CAUTION!
Do not continue driving with one or more
flat tires as handling may be
compromised. Stop the vehicle, avoiding
sharp braking and steering. If a tire
puncture occurs, repair immediately using
the dedicated tire repair kit and contact an
authorized dealer as soon as possible.
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GETTING TO KNOW YOUR INSTRUMENT PANEL
66
Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the
driver’s responsibility to maintain correct tire
pressure, even if under-inflation has not
reached the level to trigger illumination of
the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate
when the system is not operating properly.
The TPMS malfunction indicator is
combined with the low tire pressure telltale.
When the system detects a malfunction, the
telltale will flash for approximately one
minute and then remain continuously illumi-
nated. This sequence will continue upon
subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction
indicator is illuminated, the system may not
be able to detect or signal low tire pressure
as intended. TPMS malfunctions may occur
for a variety of reasons, including the instal -
lation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing
one or more tires or wheels on your vehicle to
ensure that the replacement or alternate
tires and wheels allow the TPMS to continue
to function properly.
Towing Hook Breakdown Warning Light — If
Equipped
This light illuminates when there is
a failure with the tow hook. Contact
an authorized dealer for service.
Yellow Indicator Lights
4WD Low Indicator Light — If Equipped
This light alerts the driver that the
vehicle is in the four-wheel drive
LOW mode. The front and rear drive -
shafts are mechanically locked together
forcing the front and rear wheels to rotate at
the same speed. Low range provides a
greater gear reduction ratio to provide
increased torque at the wheels.
Refer to “Four-Wheel Drive Operation — If
Equipped” in “Starting And Operating” for
further information on four-wheel drive oper -
ation and proper use.
4WD Lock Indicator Light
This light alerts the driver that the
vehicle is in the four-wheel drive
LOCK mode. The front and rear
driveshafts are mechanically locked
together, forcing the front and rear wheels to
rotate at the same speed.
Refer to “Four-Wheel Drive Operation — If
Equipped” in “Starting And Operating” for
further information on four-wheel drive oper -
ation and proper use.
CAUTION!
The TPMS has been optimized for the
original equipment tires and wheels.
TPMS pressures and warning have been
established for the tire size equipped on
your vehicle. Undesirable system operation
or sensor damage may result when using
replacement equipment that is not of the
same size, type, and/or style. Aftermarket
wheels can cause sensor damage. Using
aftermarket tire sealants may cause the
Tire Pressure Monitoring System (TPMS)
sensor to become inoperable. After using
an aftermarket tire sealant it is
recommended that you take your vehicle to
an authorized dealer to have your sensor
function checked.
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71
Gray Indicator Lights
Cruise Control Ready Indicator Light — If
Equipped With Base Instrument Cluster
This light will turn on when the
speed control has been turned on,
but not set. Refer to “Speed Control
— If Equipped” in “Starting And Operating”
for further information.
Active Speed Limiter Ready Indicator Light
— If Equipped With A Base Instrument
Cluster
This light will turn on when the
Active Speed Limiter is on, but not
set.
ONBOARD DIAGNOSTIC
SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
Onboard Diagnostic system called OBD II.
This system monitors the performance of the
emissions, engine, and automatic transmis -
sion control systems. When these systems
are operating properly, your vehicle will
provide excellent performance and fuel
economy, as well as emissions well within
current government regulations. If any of these systems require service, the
OBD II system will turn on the Malfunction
Indicator Light (MIL). It will also store diag
-
nostic codes and other information to assist
your service technician in making repairs.
Although your vehicle will usually be drivable
and not need towing, see an authorized
dealer for service as soon as possible.Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to
the performance of your emissions controls. Authorized service technicians may need to
access this information to assist with the
diagnosis and service of your vehicle and
emissions system.
For further information, refer to “Cybersecu
-
rity” in “Multimedia”.
CAUTION!
Prolonged driving with the MIL on could
cause further damage to the emission
control system. It could also affect fuel
economy and driveability. The vehicle
must be serviced before any emissions
tests can be performed.
If the MIL is flashing while the vehicle is
running, severe catalytic converter
damage and power loss will soon occur.
Immediate service is required.
WARNING!
ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to read the VIN,
diagnose, or service your vehicle.
If unauthorized equipment is connected
to the OBD II connection port, such as a
driver-behavior tracking device, it may:
Be possible that vehicle systems, including safety related systems,could be impaired or a loss of vehicle
control could occur that may result in
an accident involving serious injury
or death.
Access, or allow others to access, information stored in your vehicle
systems, including personal informa-
tion.
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72
(Continued)
SAFETY
SAFETY FEATURES
Anti-Lock Brake System (ABS)
The Anti-Lock Brake System (ABS) provides
increased vehicle stability and brake perfor-
mance under most braking conditions. The
system automatically prevents wheel lock,
and enhances vehicle control during braking.
The ABS performs a self-check cycle to
ensure that the ABS is working properly each
time the vehicle is started and driven. During
this self-check, you may hear a slight
clicking sound as well as some related motor
noises.
ABS is activated during braking when the
system detects one or more wheels begin to
lock. Road conditions such as ice, snow,
gravel, bumps, railroad tracks, loose debris,
or panic stops may increase the likelihood of
ABS activation(s).
You also may experience the following when
ABS activates:
The ABS motor noise (it may continue to
run for a short time after the stop)
The clicking sound of solenoid valves
Brake pedal pulsations
A slight drop of the brake pedal at the end
of the stop
These are all normal characteristics of ABS.
ABS is designed to function with the Original
Equipment Manufacturer’s tires. Modifica-
tion may result in degraded ABS perfor -
mance.
Anti-Lock Brake Warning Light
The yellow “Anti-Lock Brake Warning Light”
will turn on when the ignition is turned 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.
WARNING!
The ABS contains sophisticated elec-
tronic equipment that may be suscep -
tible to interference caused by
improperly installed or high output radio
transmitting equipment. This interfer -
ence can cause possible loss of anti-lock
braking capability. Installation of such
equipment should be performed by qual -
ified professionals.
Pumping of the Anti-Lock Brakes will
diminish their effectiveness and may
lead to a collision. Pumping makes the
stopping distance longer. Just press
firmly on your brake pedal when you
need to slow down or stop.
The ABS cannot prevent the natural laws
of physics from acting on the vehicle, nor
can it increase braking or steering effi -
ciency beyond that afforded by the
condition of the vehicle brakes and tires
or the traction afforded.
The ABS cannot prevent collisions,
including those resulting from excessive
speed in turns, following another vehicle
too closely, or hydroplaning.
The capabilities of an ABS equipped
vehicle must never be exploited in a
reckless or dangerous manner that could
jeopardize the user’s safety or the safety
of others.
WARNING! (Continued)
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73
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 turned to the ON/RUN mode, have
the light repaired as soon as possible.
Electronic Brake Control System
Your vehicle is equipped with an advanced
Electronic Brake Control system (EBC). This
system includes Electronic Brake Force
Distribution (EBD), Anti-Lock Brake System
(ABS), Brake Assist System (BAS), Hill Start
Assist (HSA), Traction Control System (TCS),
Electronic Stability Control (ESC), and Elec-
tronic Roll Mitigation (ERM). These systems
work together to enhance both vehicle
stability and control in various driving condi -
tions.
Your vehicle may also be equipped with
Ready Alert Braking (RAB), Rain Brake
Support (RBS), Trailer Sway Control (TSC),
Hill Descent Control (HDC), and Dynamic
Steering Torque (DST).
Brake Assist System (BAS) — If Equipped
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.
Brake System Warning Light
The red “Brake System Warning Light” will
turn on when the ignition is turned to 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.
Dynamic Steering Torque (DST)
Dynamic Steering Torque (DST) is a feature
of the ESC and Electric Power Steering
(EPS) modules that provides torque at the
steering wheel for certain driving conditions
in which the ESC module is detecting vehicle
instability. The torque that the steering
wheel receives is only meant to help the
driver realize optimal steering behavior in
order to reach/maintain vehicle stability. The
only notification the driver receives that the
feature is active is the torque applied to the
steering wheel. 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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SAFETY
82
Entering From The Rear
Vehicles that come up from behind your
vehicle on either side and enter the rear
detection zone with a relative speed of less
than 30 mph (48 km/h).Rear Monitoring
Overtaking Traffic
If you pass another vehicle slowly with a rela -
tive speed less than 10 mph (16 km/h) and
the vehicle remains in the blind spot for
approximately 1.5 seconds, the warning light
will be illuminated. If the difference in speed
between the two vehicles is greater than
10 mph (16 km/h), the warning light will not
illuminate. Overtaking/Approaching
Overtaking/Passing
The BSM system is designed not to issue an
alert on stationary objects such as guardrails,
posts, walls, foliage, berms, etc. However,
occasionally the system may alert on such
objects. This is normal operation and your
vehicle does not require service. Stationary Objects
The BSM system will not alert you of objects
that are traveling in the opposite direction of
the vehicle in adjacent lanes.
NOTE:
The BSM system may experience drop outs
(blinking on and off) in the side mirror LED
icons while a motorcycle, or any small target,
remains at the vehicle’s B-pillar for an
extended period of time (longer than a
couple of seconds).
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SAFETY
86
Changing the FCW status to the “Near”
setting, allows the system to warn the driver
of a possible collision with the vehicle in
front when the distance between the vehicle
in the front is much closer. This setting
provides less reaction time than the “Far”
and “Medium” settings, which allows for a
more dynamic driving experience.
NOTE:
The system will NOT retain the last setting
selected by the driver after ignition shut
down. The system will reset to Medium
sensitivity with FCW "Full On" setting
when the vehicle is restarted.
FCW may not react to irrelevant objects
such as overhead objects, ground reflec-
tions, objects not in the path of the
vehicle, stationary objects that are far
away, oncoming traffic, or leading vehicles
with the same or higher rate of speed.
If FCW is disabled, unavailable screens
will be displayed.
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 drivable under normal
conditions, the active braking may not be
fully available. Once the condition that
limited the system performance is no longer
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 “FCW Unavailable
Service Required”, this indicates there is an
internal system fault. Although the vehicle is
still drivable under normal conditions, have
the system checked by an authorized dealer.
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.
The tire pressure will vary with temperature
by approximately 1 psi (7 kPa) for every 12°F
(6.5°C). This means that when the outside
temperature decreases, the tire pressure will
decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is
defined as the tire pressure after the vehicle
has not been driven for at least three hours,
or driven less than 1 mile (1.6 km) after a
three hour period. The cold tire inflation
pressure must not exceed the maximum
inflation pressure molded into the tire side
-
wall. Refer to “Tires” in “Servicing And
Maintenance” for information on how to
properly inflate the vehicle’s tires. The tire
pressure will also increase as the vehicle is
driven. This is normal and there should be no
adjustment for this increased pressure.
The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the
low-pressure warning limit for any reason,
including low temperature effects and
natural pressure loss through the tire. The
TPMS will continue to warn the driver of low
tire pressure as long as the condition exists,
and will not turn off until the tire pressure is
at or above the recommended cold placard
pressure.
NOTE:
Once the low tire pressure warning (TPMS
Warning Light) illuminates, you must
increase the tire pressure to the recom -
mended cold placard pressure in order for
the TPMS Warning Light to turn off.
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SAFETY
88
Premium System
The Tire Pressure Monitoring System (TPMS)
uses wireless technology with wheel rim
mounted electronic sensors to monitor tire
pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire
pressure readings to the receiver module.
NOTE:
It is particularly important for you to check
the tire pressure in all of the tires on your
vehicle monthly and to maintain the proper
pressure.
The TPMS consists of the following compo-
nents:
Receiver Module
Four Tire Pressure Monitoring sensors
Various Tire Pressure Monitoring System
messages, which will display in the instru -
ment cluster display.
Tire Pressure Monitoring System Warning
Light
Tire Pressure Monitoring Low Pressure
Warnings
The Tire Pressure Monitoring
System Warning Light will illumi -nate in the instrument cluster and a chime
will sound when tire pressure is low in one or
more of the four active road tires. In addi
-
tion, the instrument cluster will display a
"Tire Low" message and a graphic showing
the pressure values of each tire with the low
tire pressure values highlighted or in a
different color.
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 highlighted or in a different color
in the instrument cluster display graphic) to
the vehicle’s recommended cold placard
pressure value. Once the system receives the
updated tire pressures, the system will auto -
matically update, the pressure values in the
graphic display in the instrument cluster will stop being highlighted or return to their orig
-
inal color, and the Tire Pressure Monitoring
System Warning Light will turn off.
NOTE:
When filling warm tires, the tire pressure
may need to be increased up to an additional
4 psi (28 kPa) above the recommended cold
placard pressure in order to turn the Tire
Pressure Monitoring System Warning Light
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 informa -
tion.
Service TPMS Warning
When a system fault is detected, the Tire
Pressure Monitoring System 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
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