2017 JEEP GRAND CHEROKEE transmission

Enabling HDC
HDC is enabled by pushing the HDC switch, but the
following conditions must also be met to enable HDC:
•Driveline is in 4WD Low Range
• Vehicle speed is below 5 mph (8 km/h).
• Parking brake is released.
• Driver door is closed.
Activating HDC
Once HDC is enabled it will activate automatically if
driven down a grade of sufficient magnitude. The set speed
for HDC is selectable by the driver, and can be adjusted by
using the gear shift +/-. The following summarizes the
HDC set speeds:
HDC Target Set Speeds
• P = No set speed. HDC may be enabled but will not
activate
• R = 0.6 mph (1 km/h)
• N = 1.2 mph (2 km/h)
• D = 0.6 mph (1 km/h) •
1st = 0.6 mph (1 km/h)
• 2nd = 1.2 mph (2 km/h)
• 3rd = 1.8 mph (3 km/h)
• 4th = 2.5 mph (4 km/h)
• 5th = 3.1 mph (5 km/h)
• 6th = 3.7 mph (6 km/h)
• 7th = 4.3 mph (7 km/h)
• 8th = 5.0 mph (8 km/h)
• 9th = 5.6 mph (9 km/h) – If Equipped
NOTE: During HDC the +/- shifter input is used for HDC
target speed selection, but will not affect the gear chosen by
the transmission. When actively controlling HDC the trans-
mission will shift appropriately for the driver-selected set
speed and corresponding driving conditions.
Driver Override
The driver may override HDC activation with throttle or
brake application at anytime.
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SAFETY 191

WARNING!
HDC is only intended to assist the driver in controlling
vehicle speed when descending hills. The driver must
remain attentive to the driving conditions and is re-
sponsible for maintaining a safe vehicle speed.
Selec Speed Control (SSC) — If Equipped
SSC is intended for off road driving in 4WD Low Range
only. SSC maintains vehicle speed by actively controlling
engine torque and brakes.
SSC has three states:
1. Off (feature is not enabled and will not activate).
2. Enabled (feature is enabled and ready but activationconditions are not met, or driver is actively overriding
with brake or throttle application).
3. Active (feature is enabled and actively controlling ve- hicle speed).
Enabling SSC
SSC is enabled by pushing the SSC switch, but the follow-
ing conditions must also be met to enable SSC:
• Driveline is in 4WD Low Range. •
Vehicle speed is below 5 mph (8 km/h).
• Parking brake is released.
• Driver door is closed.
• Driver is not applying throttle.
Activating SSC
Once SSC is enabled it will activate automatically once the
following conditions are met:
• Driver releases throttle.
• Driver releases brake.
• Transmission is in any selection other than P.
• Vehicle speed is below 20 mph (32 km/h).
The set speed for SSC is selectable by the driver, and can be
adjusted by using the gear shift +/-. Additionally, the SSC
set speed may be reduced when climbing a grade and the
level of set speed reduction depends on the magnitude of
grade. The following summarizes the SSC set speeds:
SSC Target Set Speeds
• 1st = .6 mph (1 km/h)
• 2nd = 1.2 mph (2 km/h)
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SAFETY 193

•3rd = 1.8 mph (3 km/h)
• 4th = 2.5 mph (4 km/h)
• 5th = 3.1 mph (5 km/h)
• 6th = 3.7 mph (6 km/h)
• 7th = 4.3 mph (7 km/h)
• 8th = 5 mph (8 km/h)
• 9th = 5.6 mph (9 km/h) – If Equipped
• REVERSE = .6 mph (1 km/h)
• NEUTRAL = 1.2 mph (2 km/h)
• PARK = SSC remains enabled but not active
NOTE:
• During SSC the +/- shifter input is used for SSC target
speed selection but will not affect the gear chosen by the
transmission. While actively controlling SSC the trans-
mission will shift appropriately for the driver-selected
set speed and corresponding driving conditions.
• SSC performance is influenced by the Terrain Select
mode. This difference may be notable to the driver and
may be perceived as a varying level of aggressiveness. Driver Override:
The driver may override SSC activation with throttle or
brake application at any time.
Deactivating SSC
SSC will be deactivated but remain available if any of the
following conditions occur:
•
Driver overrides SSC set speed with throttle or brake
application.
• Vehicle speed exceeds 20 mph (32 km/h) but remains
below 40 mph (64 km/h).
• Vehicle is shifted to PARK.
Disabling SSC
SSC will deactivate and be disabled if any of the following
conditions occur:
• The driver pushes the SSC switch.
• The driveline is shifted out of 4WD Low Range.
• The parking brake is applied.
• Driver door opens.
194 SAFETY

STARTING AND OPERATING
CONTENTS
STARTING PROCEDURES —
GASOLINE ENGINES ....................265
▫ Normal Starting ....................... .265
▫ Cold Weather Operation (Below –22°F Or
30°C) ............................. .266
▫ After Starting ......................... .267
▫ If Engine Fails To Start ..................267
▫ After Starting ......................... .267
 STOP/START SYSTEM — IF EQUIPPED ........267
▫ Automatic Mode ...................... .267
▫ Possible Reasons The Engine Does Not
Autostop ........................... .268
▫ To Start The Engine While In Autostop Mode . .269
▫ To Manually Turn Off The Stop/Start System . .269
▫ To Manually Turn On The Stop/Start System . . .270 ▫
System Malfunction .....................270
 ENGINE BLOCK HEATER — IF EQUIPPED . . . .270
 ENGINE BREAK-IN RECOMMENDATIONS —
3.6L & 5.7L ENGINES .....................270
 PARKING BRAKE ...................... .271
 AUTOMATIC TRANSMISSION ..............273
▫ Ignition Park Interlock ...................274
▫ Brake/Transmission Shift Interlock System . . . .274
▫ Fuel Economy (ECO) Mode ...............274
▫ Eight–Speed Automatic Transmission ........275
 SPORT MODE — IF EQUIPPED .............283
 FOUR WHEEL DRIVE OPERATION ..........283
▫ Quadra-Trac I Operating Instructions/
Precautions — If Equipped ...............283
6

STARTING PROCEDURES — GASOLINE ENGINES
Before starting your vehicle, adjust your seat, adjust the
inside and outside mirrors, fasten your seat belt, and if
present, instruct all other occupants to buckle their seat
belts.
WARNING!
•Before exiting a vehicle, always shift the automatic
transmission into PARK and apply the parking
brake. Always make sure the keyless ignition node 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. Leaving children 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 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 of a vehicle equipped with Keyless Enter-
N-Go in the ACC or ON/RUN mode. A child could
(Continued)
WARNING! (Continued)
operate power windows, other controls, or move the
vehicle.
• Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up may
cause serious injury or death.
Normal Starting
To Turn On The Engine Using The ENGINE START/
STOP Button
1. The transmission must be in PARK or NEUTRAL.
2. Press and hold the brake pedal while pushing the ENGINE START/STOP button once.
3. The system takes over and attempts to start the vehicle. If the vehicle fails to start, the starter will disengage
automatically after 10 seconds.
4. If you wish to stop the cranking of the engine prior to the engine starting, push the button again.
NOTE: Normal starting of either a cold or a warm engine
is obtained without pumping or pressing the accelerator
pedal.6
STARTING AND OPERATING 265

To Turn Off The Engine Using ENGINE START/STOP
Button
1. Place the gear selector in PARK, then push and releasethe ENGINE START/STOP button.
2. The ignition will return to the OFF mode.
3. If the gear selector is not in PARK, the ENGINE START/ STOP button must be held for two seconds or three short
pushes in a row with the vehicle speed above 5 mph
(8 km/h) before the engine will shut off. The ignition
will remain in the ACC mode until the gear selector is in
PARK and the button is pushed twice to the OFF mode.
If the gear selector is not in PARK and the ENGINE
START/STOP button is pushed once, the instrument
cluster will display a “Vehicle Not In Park” message and
the engine will remain running. Never leave a vehicle
out of the PARK position, or it could roll.
NOTE: If the ignition is left in the ACC or RUN (engine not
running) mode and the transmission is in PARK, the
system will automatically time out after 30 minutes of
inactivity and the ignition will cycle to the OFF mode. ENGINE START/STOP Button Functions — With Driv-
er ’s Foot OFF The Brake Pedal (In PARK Or NEUTRAL
Position)
The ENGINE START/STOP button operates similar to an
ignition switch. It has four modes, OFF, ACC, RUN and
START. To change the ignition modes without starting the
vehicle and use the accessories follow these steps:
•
Starting with the ignition in the OFF mode,
• Push the ENGINE START/STOP button once to place
the ignition to the ACC mode (instrument cluster will
display “ACC”),
• Push the ENGINE START/STOP button a second time to
place the ignition to the RUN mode (instrument cluster
will display “ON/RUN”),
• Push the ENGINE START/STOP button a third time to
return the ignition to the OFF mode (instrument cluster
will display “OFF”).
Cold Weather Operation (Below –22°F Or 30°C)
To ensure reliable starting at these temperatures, use of an
externally powered electric engine block heater (available
from your Authorized Dealer) is recommended.
266 STARTING AND OPERATING

•The vehicle must be completely stopped.
• The shifter must be in a forward gear and the brake
pedal depressed.
The engine will shut down, the tachometer will move to
the zero position and the Stop/Start telltale will illuminate
indicating you are in Autostop. Customer settings will be
maintained upon return to an engine running condition.
Possible Reasons The Engine Does Not Autostop
Prior to engine shut down, the system will check many
safety and comfort conditions to see if they are fulfilled.
Detailed information about the operation of the Stop/Start
system may be viewed in the instrument cluster display
Stop/Start Screen. In the following situations, the engine
will not stop:
• Driver ’s seat belt is not buckled.
• Driver ’s door is not closed.
• Battery temperature is too warm or cold.
• Battery charge is low.
• The vehicle is on a steep grade.
• Cabin heating or cooling is in process and an acceptable
cabin temperature has not been achieved. •
HVAC is set to full defrost mode at a high blower speed.
• HVAC set to MAX A/C.
• Engine has not reached normal operating temperature.
• The transmission is not in a forward gear.
• Hood is open.
• Vehicle is in 4LO transfer case mode.
• Brake pedal is not pressed with sufficient pressure.
Other Factors Which Can Inhibit Autostop Include:
• Accelerator pedal input.
• Engine temp too high.
• 5 MPH threshold not achieved from previous AU-
TOSTOP.
• Steering angle beyond threshold.
• ACC is on and speed is set.
It may be possible for the vehicle to be driven several times
without the STOP/START system going into a STOP/
START READY state under more extreme conditions of the
items listed above.
268 STARTING AND OPERATING

To Start The Engine While In Autostop Mode
While in a forward gear, the engine will start when the
brake pedal is released or the throttle pedal is depressed.
The transmission will automatically re-engage upon en-
gine restart.
Conditions That Will Cause The Engine To Start Auto-
matically While In Autostop Mode:
•The transmission selector is moved out of DRIVE.
• To maintain cabin temperature comfort.
• HVAC is set to full defrost mode.
• HVAC system temperature or fan speed is manually
adjusted.
• Battery voltage drops too low.
• Low brake vacuum (e.g. after several brake pedal appli-
cations).
• STOP/START OFF switch is pushed.
• A STOP/START system error occurs.
• 4WD system is put into 4LO mode.
To Manually Turn Off The Stop/Start System
1. Push the STOP/START OFF switch (located on the
switch bank). The light on the switch will illuminate.
2. The “STOP/START OFF” message will appear in the instrument cluster display. Refer to “Instrument Cluster
Display” in “Getting To Know Your Instrument Panel”
for further information.
3. At the next vehicle stop (after turning off the STOP/ START system), the engine will not be stopped.
STOP/START Off Switch
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STARTING AND OPERATING 269