stop start Ram 1500 2020 Service Manual

318 STARTING AND OPERATING
When operating your vehicle in 4WD LOW, the engine
speed is approximately three times that of the 2WD, 4WD
AUTO or 4WD HIGH positions at a given road speed. Take
care not to overspeed the engine and do not exceed 25 mph
(40 km/h).
Proper operation of four-wheel drive vehicles depends on
tires of equal size, type and circumference on each wheel.
Any difference in tire size can cause damage to the drive-
train.
Because four-wheel drive provides improved traction, there
is a tendency to exceed safe turning and stopping speeds. Do
not go faster than road conditions permit. Shifting Procedure
NOTE:
• If any of the requirements to select a new transfer case
position have not been met, the transfer case will not shift.
The position indicator light for the previous position will
remain ON and the newly selected position indicator light
will continue to flash until all the requirements for the
selected position have been met.
• If all the requirements to select a new transfer case position have been met, the current position indicator light will
turn OFF, the selected position indicator light will flash
until the transfer case completes the shift. When the shift is
complete, the position indicator light for the selected posi -
tion will stop flashing and remain ON.
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334 STARTING AND OPERATING
STOP/START SYSTEM — IF EQUIPPED
The Stop/Start function is developed to save fuel and reduce
emissions. The system will stop the engine automatically
during a vehicle stop if the required conditions are met.
Releasing the brake pedal or shifting out of DRIVE will auto-
matically restart the engine.
Vehicles equipped with eTorque contain a heavy duty motor
generator and an additional hybrid electric battery to store
energy from vehicle deceleration for use on engine startup
after a stop as well as providing launch torque assist.
Automatic Mode
The Stop/Start feature is enabled after every normal
customer engine start. It will remain in STOP/START NOT
READY until you drive forward with a vehicle speed greater
than 2 mph (3 km/h). At that time, the system will go into
STOP/START READY and if all other conditions are met,
can go into an STOP/START AUTO STOP ACTIVE
“Autostop” mode.
To Activate The Autostop Mode, The Following Must
Occur:
1. The system must be in STOP/START READY state. A STOP/START READY message will be displayed in the instrument cluster within the Stop/Start section. Refer to
“Instrument Cluster Display” in “Getting To know Your
Instrument Panel” for further information.
2. The vehicle must be completely stopped.
3. The transmission Gear Selector must be in DRIVE 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 indi -
cating you are in an Autostop. While in an Autostop, the
Climate Controls system may automatically adjust airflow to
maintain cabin comfort. Customer settings will be main -
tained 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. In
following situations, the engine will not Autostop:
• Driver’s seat belt is not buckled
• Driver’s door is not closed
• The vehicle is on a steep grade
• Cabin heating or cooling is in process and an acceptable cabin temperature has not been achieved
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• HVAC is set to full defrost mode at a high blower speed
• Engine has not reached normal operating temperature
• Engine temperature too high
• The battery is charging
• The transmission is not in DRIVE
• Hood is open
• Vehicle is in 4L transfer case mode
• TOW/HAUL mode is selected
• Accelerator pedal input
• Excessive 12 volt loads
It may be possible to operate the vehicle several consecutive
times in extreme conditions and not meet all criteria to
enable an Autostop state.
To Start The Engine While In Autostop Mode
While in DRIVE, the engine will start when the brake pedal
is released or the throttle pedal is depressed and the trans-
mission will automatically reengage upon engine restart. Conditions That Will Cause The Engine To Start Automat
-
ically While In Autostop Mode
The engine will start automatically when:
• The transmission selector is moved from DRIVE to REVERSE, NEUTRAL, or PARK
• To maintain cabin temperature near the HVAC settings
• HVAC is set to full defrost mode
• 12 volt demand requires engine restart
• Low brake vacuum (e.g. after several brake pedal applica -
tions)
• STOP/START OFF switch is pushed
• 4WD system is put into 4L mode
• The emissions system override is present
• A STOP/START system error present
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336 STARTING AND OPERATING
Conditions That Force An Automatic Shift To Park While
In Autostop Mode
The engine will not start automatically and the transmission
will be placed in PARK if:
• The driver door is open and brake pedal released.
• The driver door is open and the driver seat belt isunbuckled.
• The engine hood has been opened.
• A STOP/START system error present.
The engine may then be restarted by moving the transmis -
sion shift selector out of PARK (e.g. to DRIVE) or, in some
cases, only by a KEY START. The instrument cluster will
display a SHIFT OUT OF PARK message, or a STOP/START
KEY START REQUIRED message, to indicate which action is
required.
Refer to “Instrument Cluster Display” in “Getting To Know
Your Instrument Panel” for further information.To Manually Turn Off The Stop Start System
1. Push the STOP/START Off switch (located near the gear selector). The light on the switch will illuminate.
STOP/START OFF Switch
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.
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STARTING AND OPERATING 337
4. If the STOP/START system is manually turned off, theengine can be started and stopped by cycling the ignition
switch or pressing the STOP/START switch again.
5. The STOP/START system will reset itself back to an ON condition every time the key is turned off and back on.
To Manually Turn On The Stop Start System
1. Push the STOP/START Off switch (located near the gearselector module).
2. The light on the switch will turn off.
System Malfunction
If there is a malfunction in the STOP/START system, the
system will not shut down the engine. A “SERVICE STOP/
START SYSTEM” message will appear in the instrument
cluster display. Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for further infor -
mation.
The system will need to be checked by your authorized
dealer.
SPEED CONTROL — IF EQUIPPED
When engaged, the Speed Control takes over accelerator
operations at speeds greater than 20 mph (32 km/h).
The Speed Control buttons are located on the right side of the
steering wheel.
Speed Control Buttons
1 — CANC/Cancel
2 — SET (+)/Accel
3 — On/Off
4 — RES/Resume
5 — SET (-)/Decel
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(Continued)
The Cruise Control system has two control modes:
• Adaptive Cruise Control mode for maintaining an appro-
priate distance between vehicles.
• Normal (Fixed Speed) Cruise Control mode for cruising at a constant preset speed. For additional information, refer
to “Normal (Fixed Speed) Cruise Control Mode” in this
section.
NOTE:
Normal (Fixed Speed) Cruise Control will not react to
preceding vehicles. Always be aware of the mode selected.
You can change the mode by using the Cruise Control
buttons. The two control modes function differently. Always
confirm which mode is selected.WARNING!
• Adaptive Cruise Control (ACC) is a convenience system. It is not a substitute for active driving involve -
ment. It is always the driver’s responsibility to be atten -
tive of road, traffic, and weather conditions, vehicle
speed, distance to the vehicle ahead; and, most impor -
tantly, brake operation to ensure safe operation of the
vehicle under all road conditions. Your complete atten -
tion is always required while driving to maintain safe
control of your vehicle. Failure to follow these warn -
ings can result in a collision and death or serious
personal injury.
• The ACC system: • Does not react to pedestrians, oncoming vehicles,and stationary objects (e.g., a stopped vehicle in a
traffic jam or a disabled vehicle).
• Cannot take street, traffic, and weather conditions into account, and may be limited upon adverse sight
distance conditions.
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342 STARTING AND OPERATING
Adaptive Cruise Control (ACC) Operation
The speed control buttons (located on the right side of the
steering wheel) operates the Adaptive Cruise Control (ACC)
system.Adaptive Cruise Control Buttons
• Does not always fully recognize complex driving
conditions, which can result in wrong or missing
distance warnings.
• Will bring the vehicle to a complete stop while following a target vehicle and hold the vehicle for
approximately three minutes in the stop position. If
the target vehicle does not start moving within three
minutes the parking brake will be activated, and the
ACC system will be cancelled.
You should switch off the ACC system:
• When driving in fog, heavy rain, heavy snow, sleet, heavy traffic, and complex driving situations (i.e., in
highway construction zones).
• When entering a turn lane or highway off ramp; when driving on roads that are winding, icy, snow-covered,
slippery, or have steep uphill or downhill slopes.
• When towing a trailer up or down steep slopes.
• When circumstances do not allow safe driving at a constant speed.
WARNING! (Continued)
1 — SET (+)/Accel
2 — Normal (Fixed Speed) Cruise Control On/Off
3 — RES/Resume
4 — SET (-)/Decel
5 — Distance Setting Decrease
6 — Adaptive Cruise Control (ACC) On/Off
7 — Distance Setting Increase
8 — CANC/Cancel
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STARTING AND OPERATING 347
Metric Speed (km/h)
• Pushing the SET (+) button once will result in a 1 km/h
increase in set speed. Each subsequent tap of the button
results in an increase of 1 km/h.
• If the button is continually pushed, the set speed will continue to increase in 10 km/h increments until the
button is released. The increase in set speed is reflected in
the instrument cluster display.
To Decrease Speed
While ACC is set, the set speed can be decreased by pushing
the SET (-) button.
The speed decrement shown is dependent on the chosen
speed unit of U.S. (mph) or Metric (km/h):
U.S. Speed (mph)
• Pushing the SET (-) button once will result in a 1 mph
decrease in set speed. Each subsequent tap of the button
results in a decrease of 1 mph.
• If the button is continually pushed, the set speed will continue to decrease in 5 mph increments until the button
is released. The decrease in set speed is reflected in the
instrument cluster display. Metric Speed (km/h)

• Pushing the SET (-) button once will result in a 1 km/h
decrease in set speed. Each subsequent tap of the button
results in a decrease of 1 km/h.
• If the button is continually pushed, the set speed will continue to decrease in 10 km/h increments until the
button is released. The decrease in set speed is reflected in
the instrument cluster display.
NOTE:
• When you override and push the SET (+) button or SET (-) buttons, the new set speed will be the current speed of the
vehicle.
• When you use the SET (-) button to decelerate, if the engine’s braking power does not slow the vehicle suffi -
ciently to reach the set speed, the brake system will auto -
matically slow the vehicle.
• The ACC system decelerates the vehicle to a full stop when following a target vehicle. If an ACC host vehicle follows a
target vehicle to a standstill, after two seconds the driver
will either have to push the RES (resume) button, or apply
the accelerator pedal to reengage the ACC to the existing
set speed.
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Brake Alert
NOTE:
The “BRAKE!” Screen in the instrument cluster display is a
warning for the driver to take action and does not necessarily
mean that the Forward Collision Warning system is
applying the brakes autonomously.
Overtake Aid
When driving with Adaptive Cruise Control (ACC)
engaged, and following a vehicle, the system will provide an
additional acceleration up to the ACC set speed to assist in passing the vehicle. This additional acceleration is triggered
when the driver utilizes the left turn signal and will only be
active when passing on the left hand side.
ACC Operation At Stop
In the event that the ACC system brings your vehicle to a
standstill while following a target vehicle, if the target
vehicle starts moving within two seconds of your vehicle
coming to a standstill, your vehicle will resume motion
without the need for any driver action.
If the target vehicle does not start moving within two
seconds of your vehicle coming to a standstill, the driver will
either have to push the RES (resume) button, or apply the
accelerator pedal to reengage the ACC to the existing Set
Speed.
NOTE:
After the ACC system holds your vehicle at a standstill for
approximately 3 consecutive minutes, the parking brake will
be activated, and the ACC system will be cancelled.
While ACC is holding your vehicle at a standstill, if the
driver seatbelt is unbuckled or the driver door is opened, the
parking brake will be activated, and the ACC system will be
cancelled.
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358 STARTING AND OPERATING
Stationary Objects And Vehicles
ACC does not react to stationary objects and stationary vehi-
cles. For example, ACC will not react in situations where the
vehicle you are following exits your lane and the vehicle
ahead is stopped in your lane. Always be attentive and ready
to apply the brakes if necessary.
Stationary Object And Stationary Vehicle ExampleGeneral Information
The following regulatory statement applies to all Radio
Frequency (RF) devices equipped in this vehicle:
This device complies with Part 15 of the FCC Rules and with
Innovation, Science and Economic Development Canada
license-exempt RSS standard(s). Operation is subject to the
following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received,including interference that may cause undesired opera -
tion.
Le présent appareil est conforme aux CNR d`Innovation,
Science and Economic Development applicables aux appar -
eils radio exempts de licence. L'exploitation est autorisée aux
deux conditions suivantes:
1. l'appareil ne doit pas produire de brouillage, et
2. l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible
d'en compromettre le fonctionnement.
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