ECU JEEP CHEROKEE 2017 KL / 5.G Service Manual

After Starting
The idle speed is controlled automatically, and it will
decrease as the engine warms up.
ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms the engine and permits
quicker starts in cold weather.
Connect the cord to a 110-115 Volt AC electrical outlet with
a grounded, three-wire extension cord.
For ambient temperatures below 0°F (-18°C), the engine
block heater is recommended. For ambient temperatures
below -20°F (-29°C), the engine block heater is required.
The engine block heater cord is routed under the hood,
behind to the driver ’s side headlamp. Follow the steps
below to properly use the engine block heater:
1. Locate the engine block heater cord (behind the driver ’sside headlamp).
2. Undo the Velcro strap that secures the heater cord in place.
3. Pull the cord to the front of the vehicle and plug it into a grounded, three-wire extension cord. 4. After the vehicle is running, reattach the cord to the
Velcro strap and properly stow away behind the driver ’s
side headlamp.
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.
• The engine block heater will require 110 Volts AC and 6.5
Amps to activate the heater element.
• The engine block heater must be plugged in at least one
hour to have an adequate warming effect on the engine.
WARNING!
Remember to disconnect the engine block heater cord
before driving. Damage to the 110-115 Volt electrical
cord could cause electrocution.
6
STARTING AND OPERATING 263

If exceptional circumstances should make it necessary to
engage the park brake while the vehicle is in motion,
maintain upward pressure on the electric park brake
switch for as long as engagement is desired. The BRAKE
telltale light will illuminate, and a continuous chime will
sound. The rear stop lamps will also be illuminated auto-
matically while the vehicle remains in motion.
To disengage the park brake while the vehicle is in motion,
release the switch. If the vehicle is brought to a complete
stop using the parking brake, when the vehicle reaches
approximately 3 mph, (5 km/h) the parking brake will
remain engaged.
WARNING!
Driving the vehicle with the parking brake engaged, or
repeated use of the parking brake to slow the vehicle
may cause serious damage to the brake system. Be sure
the parking brake is fully disengaged before driving;
failure to do so can lead to brake failure and a collision.
In the unlikely event of a malfunction of the Electric Park
Brake system, a yellow EPB fault light will illuminate. This
may be accompanied by the BRAKE telltale light flashing. In this event, urgent service of the electric park brake
system is required. Do not rely on the parking brake to
hold the vehicle stationary.
Auto Park Brake
The electric park brake can be programmed to be applied
automatically whenever the vehicle is at a standstill and
the automatic transmission is placed in PARK, whenever
the ignition is turned “OFF”. Auto Park Brake is enabled
and disabled by customer selection through the customer
programmable features section of the Uconnect Settings.
Any single auto park brake application can be bypassed by
pushing the EPB switch to the release position while the
transmission is placed in PARK.
SafeHold
SafeHold is a safety feature of the Electric Park Brake
System that will engage the park brake automatically if the
vehicle is left unsecured while the ignition is in RUN.
For automatic transmissions, the park brake will automati-
cally engage if all of the following conditions are met:
•
The vehicle is at a standstill.
• There is no attempt to depress the brake pedal or
accelerator pedal.
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STARTING AND OPERATING 267

AUTOMATIC TRANSMISSION
WARNING!
•It is dangerous to shift out of PARK or NEUTRAL if
the engine speed is higher than idle speed. If your
foot is not firmly pressing the brake pedal, the
vehicle could accelerate quickly forward or in re-
verse. You could lose control of the vehicle and hit
someone or something. Only shift into gear when the
engine is idling normally and your foot is firmly
pressing the brake pedal.
• Unintended movement of a vehicle could injure
those in or near the vehicle. As with all vehicles, you
should never exit a vehicle while the engine is
running. Before exiting a vehicle, always apply the
parking brake, shift the transmission into PARK,
turn the engine OFF, and remove the key fob. When
the ignition is in the LOCK/OFF (key removal)
position, (or, with Keyless Enter-N-Go, when the
ignition is in the OFF mode) the transmission is
locked in PARK, securing the vehicle against un-
wanted movement.
(Continued)
WARNING! (Continued)
•When leaving the vehicle, always make sure the
ignition is in the OFF mode, remove the key fob from
the vehicle, and lock the vehicle.
• Never use the PARK position as a substitute for the
parking brake. Always apply the parking brake fully
when parked to guard against vehicle movement and
possible injury or damage.
• Your vehicle could move and injure you and others if
it is not in PARK. Check by trying to move the gear
selector out of PARK with the brake pedal released.
Make sure the transmission is in PARK before leav-
ing the vehicle.
• Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing children to
be in a vehicle unattended is dangerous for a number
of reasons. A child or others could be seriously or
fatally injured. Children should be warned not to
touch the parking brake, brake pedal or the trans-
mission gear selector.
(Continued)
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STARTING AND OPERATING 269

WARNING!
•Never use the PARK position as a substitute for the
parking brake. Always apply the parking brake fully
when parked to guard against vehicle movement and
possible injury or damage.
• Your vehicle could move and injure you and others if
it is not in PARK. Check by trying to move the gear
selector out of PARK with the brake pedal released.
Make sure the transmission is in PARK before leav-
ing the vehicle.
• It is dangerous to shift out of PARK or NEUTRAL if
the engine speed is higher than idle speed. If your
foot is not firmly pressing the brake pedal, the
vehicle could accelerate quickly forward or in re-
verse. You could lose control of the vehicle and hit
someone or something. Only shift into gear when the
engine is idling normally and your foot is firmly
pressing the brake pedal.
• Unintended movement of a vehicle could injure
those in or near the vehicle. As with all vehicles, you
should never exit a vehicle while the engine is
running. Before exiting a vehicle, always apply the
parking brake, shift the transmission into PARK,
(Continued)
WARNING! (Continued)
turn the engine OFF, and remove the key fob. When
the ignition is in the LOCK/OFF (key removal)
position (or, with Keyless Enter-N-Go, when the
ignition is in the OFF mode), the transmission is
locked in PARK, securing the vehicle against un-
wanted movement.
• When leaving the vehicle, always make sure the
ignition is in the OFF mode, remove the key fob from
the vehicle, and lock the vehicle.
• Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing children to
be in a vehicle unattended is dangerous for a number
of reasons. A child or others could be seriously or
fatally injured. Children should be warned not to
touch the parking brake, brake pedal or the trans-
mission gear selector.
• Do not leave the key fob in or near the vehicle (or in
a location accessible to children), and do not leave
the ignition (in a vehicle equipped with Keyless
Enter-N-Go) in the ACC or ON/RUN mode. A child
could operate power windows, other controls, or
move the vehicle.
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STARTING AND OPERATING 273

Transmission Limp Home Mode
Transmission function is monitored electronically for ab-
normal conditions. If a condition is detected that could
result in transmission damage, Transmission Limp Home
Mode is activated. In this mode, the transmission remains
in fourth gear regardless of which forward gear is selected.
PARK, REVERSE, and NEUTRAL will continue to operate.
The Malfunction Indicator Light (MIL) may be illuminated.
Limp Home Mode allows the vehicle to be driven to an
authorized dealer for service without damaging the trans-
mission.
In the event of a momentary problem, the transmission can
be reset to regain all forward gears by performing the
following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition to the OFF position.
4. Wait approximately 10 seconds.5. Restart the engine.
6. Shift into the desired gear range. If the problem is no
longer detected, the transmission will return to normal
operation.
NOTE: Even if the transmission can be reset, we recom-
mend that you visit your authorized dealer at your earliest
possible convenience. Your authorized dealer has diagnos-
tic equipment to determine if the problem could recur. If
the transmission cannot be reset, authorized dealer service
is required.
Electronic Range Select (ERS) Operation
The Electronic Range Select (ERS) shift control allows the
driver to limit the highest available gear. For example, if
you set the transmission gear limit to 5 (fifth gear), the
transmission will not shift above fifth gear, but will shift
through the lower gears normally.
You can switch between DRIVE and ERS mode at any
vehicle speed. When the gear selector is in the DRIVE
position, the transmission will operate automatically, shift-
ing between all available gears.
276 STARTING AND OPERATING

Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo loaded
into the vehicle. The front and rear curb weight values are
determined by weighing your vehicle on a commercial
scale before any occupants or cargo are added.
Loading
The actual total weight and the weight of the front and rear
of your vehicle at the ground can best be determined by
weighing it when it is loaded and ready for operation.
The entire vehicle should first be weighed on a commercial
scale to insure that the GVWR has not been exceeded. The
weight on the front and rear of the vehicle should then be
determined separately to be sure that the load is properly
distributed over the front and rear axle. Weighing the
vehicle may show that the GAWR of either the front or rear
axles has been exceeded but the total load is within the
specified GVWR. If so, weight must be shifted from front to
rear or rear to front as appropriate until the specified
weight limitations are met. Store the heavier items down
low and be sure that the weight is distributed equally. Stow
all loose items securely before driving.Improper weight distributions can have an adverse effect
on the way your vehicle steers and handles and the way
the brakes operate.
CAUTION!
Do not load your vehicle any heavier than the GVWR
or the maximum front and rear GAWR. If you do, parts
on your vehicle can break, or it can change the way
your vehicle handles. This could cause you to lose
control. Also overloading can shorten the life of your
vehicle.
368 STARTING AND OPERATING

Trailer And Tongue Weight
Never exceed the maximum tongue weight stamped on
your bumper or trailer hitch.
Consider the following items when computing the weight
on the rear axle of the vehicle:
•The tongue weight of the trailer.
• The weight of any other type of cargo or equipment put
in or on your vehicle.
• The weight of the driver and all passengers. NOTE:
Remember that everything put into or on the
trailer adds to the load on your vehicle. Also, additional
factory-installed options or dealer-installed options must
be considered as part of the total load on your vehicle.
Refer to the “Tire And Loading Information” placard for
the maximum combined weight of occupants and cargo for
your vehicle.
Towing Requirements
To promote proper break-in of your new vehicle drivetrain
components, the following guidelines are recommended:
WARNING!
Improper towing can lead to a collision. Follow these
guidelines to make your trailer towing as safe as
possible:
• Make certain that the load is secured in the trailer
and that it will not shift during travel. When traile-
ring cargo that is not fully secured, dynamic load
shifts can occur that may be difficult for the driver to
control. You could lose control of your vehicle and
have a collision.
(Continued)
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Recreational Towing — Front-Wheel Drive (FWD)
Models
DO NOTflat tow this vehicle. Damage to the drivetrain
will result.
Recreational towing (for front-wheel drive models) is al-
lowed ONLY if the front wheels are OFFthe ground. This
may be accomplished using a tow dolly or vehicle trailer. If
using a tow dolly, follow this procedure:
1. Properly secure the dolly to the tow vehicle, following the dolly manufacturer’s instructions.
2. Drive the front wheels onto the tow dolly.
3. Apply the parking brake. Place the transmission in PARK. Turn the engine OFF.
4. Properly secure the front wheels to the dolly, following the dolly manufacturer’s instructions.
5. Turn the ignition to the ON/RUN position, but do not start the engine.
6. Press and hold the brake pedal. 7. Release the parking brake.
8. Turn the ignition OFF, remove the key fob, and release
the brake pedal.
CAUTION!
•Towing with the front wheels on the ground will
cause severe transmission damage. Damage from
improper towing is not covered under the New
Vehicle Limited Warranty.
• Ensure that the Electric Park Brake is released, and
remains released, while being towed.
Recreational Towing — 4X4 Models With 1-Speed
Power Transfer Unit
Recreational towing is not allowed. These models do not
have a NEUTRAL (N) position in the power transfer unit.
NOTE: This vehicle may be towed on a flatbed or vehicle
trailer provided all four wheels are OFF the ground.
380 STARTING AND OPERATING

6. Pull the bulb to remove it from the socket.
7. Replace the bulb and install the socket.
8. Reconnect the electrical connector.
9. Reinstall the tail lamp housing and screws.
10. Close the liftgate.
Liftgate Mounted Back-up Lamp
1. Open the liftgate.
2. Use a fiber stick or flat blade screw driver to pry thelower trim from the liftgate.
3. Once the trim is loose, pull it back exposing the trim panel.
4. Using a fiber stick or flat blade screw driver, open the trim panel exposing the back of the liftgate lamp.
5. Disconnect the electrical connector.
6.
Twist the socket counterclockwise and remove from lamp.
7. Pull the bulb to remove it from the socket.
8. Replace the bulb, reinstall the socket.
9. Connect the electrical connector. 10. Reinstall the trim panel and the lower trim.
11. Close the liftgate.
License Plate Lamp
1. Using a small screwdriver, press inward the locking tab
on the side of the lamp assembly and pull down on the
lamp assembly for removal.
2. Pull bulb from socket, replace, and reinstall the lamp assembly into place ensuring the locking tab is secure.
FUSES
WARNING!
•When replacing a blown fuse, always use an appropri-
ate replacement fuse with the same amp rating as the
original fuse. Never replace a fuse with another fuse of
higher amp rating. Never replace a blown fuse with
metal wires or any other material. Failure to use proper
fuses may result in serious personal injury, fire and/or
property damage.
•Before replacing a fuse, make sure that the ignition is
off and that all the other services are switched off
and/or disengaged.
(Continued)
400 IN CASE OF EMERGENCY

4. Remove the fastener securing the jack and spare tire.
5. Remove the chocks.
6. Remove the scissors jack and wheel bolt wrench fromthe spare wheel as an assembly. Turn the jack screw to
the left to loosen the wheel bolt wrench, and remove the
wrench from the jack assembly. NOTE:
The jack handle attaches to the side of the jack with
two attachment points. When the jack is partially ex-
panded, the tension between the two attachment points
holds the jack handle in place.
7. Remove the spare tire.
Jack And Spare Tire Fastener
Jack And Tool Assembly
7
IN CASE OF EMERGENCY 415