light JEEP GRAND CHEROKEE 2016 WK2 / 4.G Service Manual

FUEL ECONOMY (ECO) MODE
The Fuel Economy (ECO) mode can improve the vehicle's overall fuel economy during
normal driving conditions. Press the “ECO” switch in the center stack of the
instrument panel to activate or disable ECO mode. An amber light indicates when
ECO mode is disengaged.
When the Fuel Economy (ECO) Mode is
engaged, the vehicle control systems will
change the following:
• The transmission will upshift soonerand downshift later.
• The transmission will launch (from a stop) in second gear.
• The torque converter clutch may en- gage at lower engine speeds and re-
main on longer.
• The engine idle speed will be lower.
• The overall driving performance will be more conservative.
• Some ECO mode functions may be temporarily inhibited based on temperature and other factors.
NOTE:
ECO mode is only available in AUTO mode.
Active Noise Cancellation
Your vehicle is equipped with an Active Noise Cancellation System, this system is
designed to address the change in exhaust noise whenever the vehicle is operating in
Fuel Economy Mode (ECO) or 4 cylinder mode.
This system relies on four microphones embedded in the headliner to detect the
exhaust drone and prompt an onboard frequency generator to create counteracting
sound waves through the audio system's speakers and sub-woofer. This helps keep
the vehicle quiet at highway speeds.
Fuel Economy Mode Switch
SRT
172

SELEC-TRACK
Selec-Track combines the capabilities of
the vehicle control systems, along with
driver input, to provide the best perfor-
mance for all terrains.
Rotate the mode control knob to select
the following Selec-Track positions:
•Sport - Dry weather, on-road calibra-
tion. Performance based tuning that
provides a rear wheel drive feel but with improved handling and acceleration over
a two-wheel drive vehicle. The active suspension system will be in a semi firm
mode, and a green flag will light up in the instrument cluster.
• Snow - Tuning set for additional stability in inclement weather. Use on and off road
on loose traction surfaces such as snow.
• Auto - Fully automatic full time four-wheel drive operation can be used on and off
road. This position balances traction with seamless steering feel to provide
improved handling and acceleration over two-wheel drive vehicles.
• Track - This position offers track road calibration for use on high traction surfaces.
Driveline is maximized for traction. Some binding may be felt on less forgiving
surfaces.
• To w - Use this mode for towing. Vehicle suspension will go to Firm mode.
Active Damping System
This vehicle is equipped with an electronic controlled damping system. This system
reduces body roll and pitch in many driving situations including cornering, accelera-
tion and braking. There are 3 modes:
•Street Mode (Available in terrain positions AUTO, SNOW and CUSTOM.) — Used
during highway speeds where a touring suspension feel is desired.
• Sport Mode (Available in terrain positions AUTO, SPORT, CUSTOM and TOW.) —
Provides a firm suspension for better handling.
• Track Firm (Available in terrain positions AUTO, TRACK and CUSTOM.) —
Provides a full firm suspension for an aggressive track experience.
Selec-Track switch
SRT
173

DIESEL ENGINE BREAK-IN RECOMMENDATIONS
The diesel engine does not require a break-in period due to its construction. Normal
operation is allowed, providing the following recommendations are followed:
• Warm up the engine before placing it under load.
• Do not operate the engine at idle for prolonged periods.
• Use the appropriate transmission gear to prevent engine lugging.
• Observe vehicle oil pressure and temperature indicators.
• Check the coolant and oil levels frequently.
• Vary throttle position at highway speeds when carrying or towing significantweight.
NOTE:
Light duty operation such as light trailer towing or no load operation will extend the
time before the engine is at full efficiency. Reduced fuel economy and power may be
seen at this time.
The engine oil installed in the engine at the factory is a high-quality energy
conserving type lubricant. Oil changes should be consistent with anticipated climate
conditions under which vehicle operations will occur. NON-DETERGENT OR
STRAIGHT MINERAL OILS MUST NEVER BE USED.
DIESEL ENGINE STARTING PROCEDURES
Normal Starting Procedure
1. Apply the parking brake.
2. Ensure the gear selector is in the PARK position.
3. Press and hold the brake pedal while pushing the ENGINE START/STOP button once and the system will engage the starter to crank the engine.
NOTE: • A delay of the start of up to five seconds is possible under very cold conditions.The “Wait to Start” telltale will be illuminated during the pre-heat process,
When the engine Wait To Start light goes off the engine will automatically crank.
• If you wish to stop the cranking of the engine prior to the engine starting, push the button again.
4. Check that the oil pressure warning light has turned off.
5. Release the parking brake.
DIESEL
180

CAUTION!
If the “Water in Fuel Indicator Light” remains on, DO NOT START the engine
before you drain the water from the fuel filters to avoid engine damage. Refer to
“Maintenance Procedures/Draining Fuel/Water Separator Filter” in “Maintaining
Your Vehicle” in your Diesel Supplement on the DVD for further information.
Extreme Cold Weather
The engine block heater is a resistance heater installed in the water jacket of the
engine. It requires a 110–115 Volt AC electrical outlet with a grounded, three-wire
extension cord.
Its use is recommended for environments that routinely fall below -10°F. It should be
used when the vehicle has not been running overnight or longer periods and should
be plugged in two hours prior to start. Its use is required for cold starts with
temperatures under -20°F.
A 12 Volt heater built into the fuel filter housing aids in preventing fuel gelling. It is
controlled by a built-in thermostat.
A Diesel Pre-Heat system both improves engine starting and reduces the amount of
white smoke generated by a warming engine.
NOTE:
The engine block heater cord is a factory installed option. If your vehicle is not
equipped, heater cords are available from your authorized MOPAR dealer.
Water In Fuel Message
If a Water In Fuel message orindicator appears in the cluster and a chime
sounds five times, the fuel/water separator will need to be drained immediately to
prevent engine damage.
Refer to “Draining Fuel Water Separator” in this guide for draining instructions or see
your dealer.
DIESEL
181

DIESEL FUEL FILTERS/WATER SEPARATOR
Draining Fuel/Water Separator
If the “Water in Fuel” indicator light
is illuminated and an audible chime
is heard five times, you should stop the
engine and drain the water from the sepa-
rator.
The best access to this water drain valve
is from under the vehicle.
The drain valve is located on the bottom
of the Fuel Filter and Water Separator
assembly which is located on the left side
of the vehicle in front of the fuel tank.
1. Loosen the drain valve (located on the bottom of the filter assembly) then
turn the ignition switch to the ON/
RUN position to allow any accumu-
lated water to drain.
2. When clean fuel is visible, close the drain and switch the ignition to the OFF position.
Refer to the Diesel Supplement on the DVD for further details.
Fuel Filter Replacement
1. Ensure engine is turned off.
2. Place drain pan under the fuel filter assembly.
3. Open the water drain valve, and let any accumulated water drain.
4. Close the water drain valve.
5. Remove using a socket. Rotate counterclockwise for removal.
6. Remove the used filter cartridge from the housing and dispose of according to your local regulations.
7. Wipe clean the sealing surfaces of the lid and housing.
8. Lubricate o-ring on new filter with clean engine oil.
9. Repeat steps 5 through 8 to service second filter in fuel filter assembly.
Fuel Filter And Water Separator Assembly
1 — Fuel Filter Access
2 — Water In Fuel Drain
DIESEL
182

CAUTION!
• Diesel fuel will damage blacktop paving surfaces. Drain the filter into anappropriate container.
• Do not prefill the fuel filter when installing a new fuel filter. There is a
possibility debris could be introduced into the fuel filter during this action. It
is best to install the filter dry and allow the in-tank lift pump to prime the fuel
system.
• If the “Water In Fuel Indicator Light” remains on, DO NOT START the engine
before you drain water from the fuel filter to avoid engine damage.
EXHAUST REGENERATION
This engine meets all required EPA diesel engine emissions standards. To achieve
these emissions standards, your vehicle is equipped with a state-of-the-art engine
and exhaust system. These systems are seamlessly integrated into your vehicle and
managed by the Powertrain Control Module (PCM). Additionally, your vehicle has the
ability to alert you to additional maintenance required on your vehicle or engine.
Refer to the following messages that may be displayed on your Driver Information
Display (DID).
Exhaust System — Regeneration Required Now
This message Indicates that the Diesel Particulate Filter (DPF) reached 80% of its
maximum storage capacity.
By simply driving your vehicle at highway speeds for up to 20 minutes, you can
remedy the condition in the particulate filter system and allow your diesel engine and
exhaust after-treatment system to cleanse the filter to remove the trapped PM and
restore the system to normal operating condition.
Exhaust System — Regeneration in Process Exhaust Filter XX% Full
Indicates that the Diesel Particulate Filter (DPF) is self-cleaning. Maintain your
current driving condition until regeneration is completed.
Exhaust System — Regeneration Completed
This message indicates that the Diesel Particulate Filter (DPF) self-cleaning is
completed. If this message is displayed, you will hear one chime to assist in alerting
you of this condition.
DIESEL
183

Exhaust Service Required — See Dealer Now
This message indicates regeneration has been disabled due to a system malfunction.
The Powertrain control Module (PCM) will register a fault code and the instrument
panel will display the Malfunction Indicator Light (MIL).
CAUTION!
See your authorized dealer, as damage to the exhaust system could occur soon
with continued operation.
Exhaust Filter Full — Power Reduced See Dealer
The PCM derates the engine in order to limit the likelihood of permanent damage to
the after-treatment system. If this condition is not corrected and a dealer service is
not performed, extensive exhaust after-treatment damage can occur. Have your
vehicle serviced by your local authorized dealer.
NOTE:
Failing to follow the oil change indicator, changing your oil and resetting the oil
change indicator by 0 miles remaining will prevent the diesel exhaust filter from
performing it's cleaning routine. This will shortly result in a Malfunction Indicator
Light (MIL) and reduced engine power. Only an authorized dealer will be able to
correct this condition.
CAUTION!
See your authorized dealer, as damage to the exhaust system could occur with the
exhaust filter full.
DIESEL EXHAUST FLUID
Diesel Exhaust Fluid (DEF) sometimes known simply by the name of its active
component, UREA – is a key component of selective catalytic reduction (SCR)
systems, which help diesel vehicles meet stringent emission regulations. DEF is a
liquid reducing agent that reacts with engine exhaust in the presence of a catalyst to
convert smog-forming nitrogen oxides (NOx) into harmless nitrogen and water vapor.
Your vehicle is equipped with a Selective Catalytic Reduction system in order to meet
the very stringent diesel emissions standards required by the Environmental Protec-
tion Agency. Selective Catalytic Reduction (SCR) is the first and only technology in
decades to be as good for the environment as it is good for business and vehicle
performance.
DIESEL
184

Diesel Exhaust Fluid (DEF) Warning Messages
Your vehicle will begin displaying warning messages when the DEF level reaches a
driving range of approximately 500 miles. If the following warning message sequence
is ignored, your vehicle may not restart unless DEF is added with in the displayed
mileage shown in the DID message.
•Engine Will Not Restart in XXXX mi DEF Low Refill Soon — This message will display
when DEF driving range is less than 500 miles, DEF fluid top off is required with
in the displayed mileage. The message will be displayed in the DID during vehicle
start up with the current allowed mileage and accompanied by a single chime. The
remaining mileage can be pulled up anytime by way of the “Messages” list within
the DID
• Engine Will Not Restart in XXXX mi Refill DEF — This message will display when DEF
driving range is less than 311 miles. It is also displayed at 249 miles, 186 miles,
and 124 miles. Continuous Display starts at 124 miles. DEF fluid top off is
required with in the displayed mileage. The message will be displayed in the DID
during vehicle start up with an updated distance mileage, and it will be accom-
panied by a single chime. Starting at 100 miles, remaining range will be
continuously displayed while operating the vehicle. Chimes will also accompany
the 75, 50 and 25 mile remaining distances. The DEF Low telltale will be on
continuously until DEF fluid is topped off.
• Engine Will Not Restart Refill DEF — This message will display when the DEF driving
range is less than 1 mile, DEF fluid top off is required or the engine will not restart.
The message will be displayed in the DID during vehicle start up, and it will be
accompanied by a single chime. The DEF Low telltale will be illuminated
continuously until DEF fluid tank is filled with a minimum of two gallons of DEF.
Diesel Exhaust Fluid (DEF) Fault Warning Messages
There are different messages which are displayed if the vehicle detects that the DEF
system has been filled with a fluid other than DEF, has experienced component
failures, or when tampering has been detected.
When the DEF system needs to be serviced the following warnings will display:
• Service DEF System See Dealer — This message will display when the fault is
initially detected and each time the vehicle is started. The message will be
accompanied by a single chime and the Malfunction Indicator Light. We recom-
mend you drive to your nearest authorized dealer and have your vehicle serviced
immediately. If not corrected in 30 miles, vehicle will enter the “Engine Will not
restart in XXXmi Service DEF See dealer” warning stage and message.
• Incorrect DEF Detected See Dealer — This message will display if the DEF system
has detected the incorrect fluid has been introduced to the DEF tank. The message
will be accompanied by a single chime. We recommend you drive to your nearest
authorized dealer and have your vehicle serviced immediately. If not corrected in
30 miles, vehicle will enter the Engine Will not restart in XXX mi Service DEF See
dealer warning stage and message.
DIESEL
187

•Engine Will Not Restart in XXX mi Service DEF See Dealer — This message is first
displayed if the fault detected is not serviced after 30 miles of operation. It is also
displayed at 250 miles 186 miles and 124 miles. System service is required
within the displayed mileage. The message will be displayed in the DID during
vehicle start up with an updated distance mileage, and it will be accompanied by
a single chime. Starting at 124 miles, remaining range will be continuously
displayed while operating the vehicle. Chimes will also accompany the 75, 50 and
25 mile remaining distances. We recommend you drive to your nearest authorized
dealer and have your vehicle serviced immediately.
• Engine Will Not Restart Service DEF System See Dealer — This message will display
if DEF system issue detected is not serviced during the allowed period. Your engine
will not restart unless your vehicle is serviced by your authorized dealer. This
message will be displayed when under 1 mile until engine will not start and each
time the vehicle is started, and will be continuously displayed. The message will be
accompanied by a single chime. Your Malfunction Indicator Light will be continu-
ously illumined. We highly recommend you drive to your nearest authorized dealer
if the message appears while engine is running.
• Engine Will Not Start Service DEF System See Dealer — This message will display
when the fault detected is not serviced after the Engine will not restart Service DEF
System See Dealer message is displayed on the next subsequent restart. Your
engine will not start unless you vehicle is serviced by your authorized dealer. The
message will be accompanied by a single chime. Your Malfunction Indicator Light
will be continuously illuminated. If the message appears and you can not start the
engine, we recommend you have your vehicle towed to your nearest authorized
dealer immediately.
NOTE:
• The gauge may take up to five seconds to update after adding a gallon or more of Diesel Exhaust Fluid (DEF) to the DEF tank. If you have a fault related to the DEF
system, the gauge may not update to the new level. See your authorized dealer for
service.
• The DEF gauge may also not immediately update after a refill if the temperature of the DEF fluid is below 12F (-11C). The DEF line heater will possibly warm up the
DEF fluid and allow the gauge to update after a period of run time. Under very cold
conditions, it is possible that the gauge may not reflect the new fill level for several
drives.
DIESEL
188

ROADSIDE ASSISTANCE
Dial toll-free 1-800-521-2779 for U.S. Residents or 1-800-363-4869 for Canadian
Residents.
• Provide your name, vehicle identification number, license plate number, and yourlocation, including the telephone number from which you are calling.
• Briefly describe the nature of the problem and answer a few simple questions.
• You will be given the name of the service provider and an estimated time of arrival. If you feel you are in an “unsafe situation”, please let us know. With your consent,
we will contact local police or safety authorities.
INSTRUMENT CLUSTER WARNING LIGHTS
– Battery Charge Warning Light
This light illuminates when the battery is not charging properly. If the battery charge
warning light remains on, it means that the vehicle is experiencing a problem with the
charging system.
We recommend you do not continue driving if it is on. Have the vehicle serviced
immediately.
– Oil Pressure Warning Light
This light indicates low engine oil pressure. If the light turns on while driving, stop
the vehicle and shut off the engine as soon as possible. A chime will sound for four
minutes when this light turns on.
We recommend you do not operate the vehicle or engine damage will occur. Have the
vehicle serviced immediately.
– Engine Temperature Warning Light
This light warns of an overheated engine condition.
If the light turns on and a warning chime sounds while driving, safely pull over and
stop the vehicle. If the A/C system is on, turn it off. Also, shift the transmission into
NEUTRAL and idle the vehicle. If the temperature reading does not return to normal,
turn the engine off immediately.
We recommend that you do not operate the vehicle or engine damage will occur. Have
the vehicle serviced immediately.
WARNING!
A hot engine cooling system is dangerous. You or others could be badly burned by
steam or boiling coolant.
WHAT TO DO IN EMERGENCIES
189