RAM Chassis Cab (2021 year). Manual in english — page 7

106

STARTING AND OPERATING

If the vehicle is not in PARK and the driver turns off

the engine, the vehicle may AutoPark.
AutoPark will engage when all of these conditions

are met:



Vehicle is equipped with a rotary shifter and an

8-speed transmission



Vehicle is not in PARK



Vehicle speed is 1.2 mph (1.9 km/h) or less



Ignition switched from RUN to ACC

NOTE:

For Keyless Enter ’n Go™ equipped vehicles, the

engine will turn off and the ignition switch will

change to ACC mode. After 30 minutes the ignition

switches to OFF automatically, unless the driver

turns the ignition switch OFF.
If the vehicle is not in PARK and the driver exits the

vehicle with the engine running, the vehicle may

AutoPark.
AutoPark will engage when all of these conditions

are met:



Vehicle is equipped with a rotary shifter and an

8-speed transmission



Vehicle is not in PARK



Vehicle speed is 1.2 mph (1.9 km/h) or less



Driver’s seat belt is unbuckled



Driver’s door is ajar



Brake pedal is not pressed

The message “AutoPark Engaged Shift to P then

Shift to Gear” will display in the instrument cluster.

NOTE:

In some cases the ParkSense graphic will be

displayed in the instrument cluster, causing the

“AutoPark Engaged Shift to P then Shift to Gear” to

not be seen. In these cases, the shifter must be

returned to “P” to select desired gear.
If the driver shifts into PARK while moving, the

vehicle may AutoPark.
AutoPark will engage ONLY when vehicle speed is

1.2 mph (1.9 km/h) or less.
The message “Vehicle Speed is Too High to Shift to

P” will be displayed in the instrument cluster if

vehicle speed is above 1.2 mph (1.9 km/h).

4WD Low — If Equipped
AutoPark will be disabled when operating the

vehicle in 4WD LOW.
The message “AutoPark Disabled” will be

displayed in the instrument cluster.
Additional customer warnings will be given when

all of these conditions are met:



Vehicle is not in PARK



Driver’s door is ajar



Vehicle is in 4WD Low range

The message “AutoPark Not Engaged” will be

displayed in the instrument cluster. A warning

chime will continue until you shift the vehicle into

PARK or the driver’s door is closed.
ALWAYS DO A VISUAL CHECK that your vehicle is in

PARK by looking for the “P” in the instrument

cluster display and near the shifter. As an added

precaution, always apply the parking brake when

exiting the vehicle.

If Engine Fails To Start

If the engine fails to start after you have followed

the “Normal Starting” procedure, it may be

flooded. Push the accelerator pedal all the way to

the floor and hold it there while the engine is

cranking. This should clear any excess fuel in case

the engine is flooded.

WARNING!

If vehicle speed is above 1.2 mph (1.9 km/h), the

transmission will default to NEUTRAL until the

vehicle speed drops below 1.2 mph (1.9 km/h). A

vehicle left in the NEUTRAL position can roll. As

an added precaution, always apply the parking

brake when exiting the vehicle.

STARTING AND OPERATING

107

The starter motor will engage automatically, run for

10 seconds, and then disengage. Once this occurs,

release the accelerator pedal and the brake pedal,

wait 10 to 15 seconds, then repeat the “Normal

Starting” procedure.

If the engine has been flooded, it may start to run,

but not have enough power to continue running

when the ignition button/key is released. If this

occurs, continue cranking with the accelerator

pedal pushed all the way to the floor. Release the

accelerator pedal and the ignition button/key once

the engine is running smoothly.
If the engine shows no sign of starting after a

10 second period of engine cranking with the

accelerator pedal held to the floor, wait

10 to 15 seconds, then repeat the “Normal

Starting” procedure.

C

OLD

W

EATHER

O

PERATION

(B

ELOW

–22°F O

R

−30°C)

To ensure reliable starting at these temperatures,

use of an externally powered electric engine block

heater (available from an authorized dealer) is

recommended.

A

FTER

S

TARTING

The idle speed is controlled automatically, and it

will decrease as the engine warms up.

STARTING THE ENGINE — DIESEL ENGINE

Before starting your vehicle, adjust your seat,

adjust both inside and outside mirrors, and fasten

your seat belts.

The starter should not be operated for more than

25-second intervals. Waiting a few minutes

between such intervals will protect the starter from

overheating.

WARNING!



Never pour fuel or other flammable liquid into

the throttle body air inlet opening in an

attempt to start the vehicle. This could result

in flash fire causing serious personal injury.



Do not attempt to push or tow your vehicle to

get it started. Vehicles equipped with an auto

-

matic transmission cannot be started this

way. Unburned fuel could enter the catalytic

converter and once the engine has started,

ignite and damage the converter and vehicle.



If the vehicle has a discharged battery,

booster cables may be used to obtain a start

from a booster battery or the battery in

another vehicle. This type of start can be

dangerous if done improperly

Ú

page 295.

CAUTION!

To prevent damage to the starter, do not crank

the engine for more than 10 seconds at a time.

Wait 10 to 15 seconds before trying again.

WARNING!



Do not leave children or animals inside parked

vehicles in hot weather. Interior heat build-up

may cause serious injury or death.



When leaving the vehicle, always remove the

key fob and lock your vehicle.



Never leave children alone in a vehicle, or with

access to an unlocked vehicle. Allowing chil

-

dren 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 gear

selector. Do not leave the key fob in or near

the vehicle (or in a location accessible to chil

-

dren), 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

operate power windows, other controls, or

move the vehicle.

4

108

STARTING AND OPERATING

A

UTOMATIC

T

RANSMISSION

Start the engine with the transmission in the

NEUTRAL or PARK position. Apply the brake before

shifting to any driving range.

Tip Start Feature

Do not press the accelerator. Place the ignition

switch briefly to the START position and release it.

The starter motor will continue to run and will

automatically disengage when the engine is

running.

K

EYLESS

E

NTER

‘

N

G

O

™ — I

GNITION

This feature allows the driver to operate the

ignition switch with the push of a button, as long as

the Remote Start/Keyless Enter ‘n Go™ key fob is

in the passenger compartment.

Normal Starting

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 25

seconds.

4. If you wish to stop the cranking of the engine

prior to the engine starting, remove your foot

from the brake pedal and push the ENGINE

START/STOP button again.

NOTE:



Normal starting of either a cold or a warm

engine is obtained without pumping or pressing

the accelerator pedal.



Under cold weather conditions, the engine may

not immediately crank if the "Wait to Start" tell

-

tale is illuminated. This is normal operation. For

vehicles equipped with Keyless Enter ‘n Go™,

the vehicle will automatically crank when the

"Wait to Start" time has elapsed

Ú

page 110.

TO TURN OFF THE ENGINE USING ENGINE

START/STOP BUTTON

1. Place the gear selector in PARK, then push

and release the ENGINE START/STOP button.

2. The ignition will return to the OFF mode.
3. 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.

4. If the gear selector is in NEUTRAL, and the

vehicle speed below 5 mph (8 km/h), pushing

the ENGINE START/STOP button once will turn

the engine off. The ignition will remain in the

ACC mode.

5. If the vehicle speed is above 5 mph (8 km/h),

the ENGINE START/STOP button must be held

for two seconds (or three short pushes in a

row) to turn the engine off. The ignition will

remain in the ACC mode (NOT the OFF mode) if

the engine is turned off when the transmission

is not in PARK.

NOTE:

If the ignition is left in the ACC or ON/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 return to

the OFF mode.

ENGINE START/STOP BUTTON FUNCTIONS —

WITH DRIVER’S FOOT OFF THE BRAKE PEDAL

(IN PARK OR NEUTRAL POSITION)

The ENGINE START/STOP button operates similar

to an ignition switch. It has three positions, OFF,

ACC, RUN. To change the ignition switch positions

without starting the vehicle and use the

accessories follow these steps:
1. Start with the ignition in the OFF position.
2. Push the ENGINE START/STOP button once to

change the ignition to the ACC position.

STARTING AND OPERATING

109

3. Push the ENGINE START/STOP button a

second time to change the ignition to the RUN

position.

4. Push the ENGINE START/STOP button a third

time to return the ignition to the OFF position.

Keyless Enter ‘n Go™ Starting Procedure —

Engine Manifold Air Temperature 0°F To

66°F (–18°C to 19°C)

NOTE:

The temperature displayed in the instrument

cluster does not necessarily reflect the engine

manifold air temperature

Ú

page 78. When

engine temperatures fall below 66°F (19°C) the

“Wait To Start” telltale will remain on indicating the

intake air heater system is active.
Follow the steps in the “Normal Starting”

procedure except:
1. Pushing the engine start button with the

driver’s foot on the brake will move the

ignition from OFF or ACC to RUN, and will

illuminate the "Wait to Start" telltale. The

engine will not immediately crank, this is

normal operation.

2. The “Wait to Start" telltale will remain on for a

period of time that varies depending on the

engine temperature.

3. While the "Wait to Start" telltale is on, the

instrument cluster will additionally display a

gauge or bar whose initial length represents

the full "Wait to Start" time period. Its length

will decrease until it disappears when the

"Wait to Start" time has elapsed.

4. After the engine “Wait to Start” telltale goes

off, the engine will automatically crank.

5. After engine start-up, check to see that there is

oil pressure.

6. Release the parking brake and drive.

NOTE:



Engine idle speed will automatically increase to

1,000 RPM and engage the Variable Geometry

Turbocharger at low coolant temperatures to

improve engine warm-up.



The engine will not automatically crank after the

engine "Wait to Start" telltale goes off if a door

or the hood is ajar.



If the engine stalls, or if the ignition switch is left

ON for more than two minutes after the “Wait to

Start” telltale goes out, reset the intake air

heater by turning the ignition switch to the OFF

position for at least 5 seconds and then back

ON. Repeat steps 1 through 6 of “Keyless Enter

‘n Go™ Starting Procedure – Engine Manifold Air

Temperature 0°F To 66°F (–18°C to 19°C).”

E

XTREME

C

OLD

W

EATHER

The Cummins® Turbo Diesel engine is equipped

with several features designed to assist cold

weather starting and operation:



The engine block heater is a resistance heater

installed in the water jacket of the engine just

above and behind the oil filter. It requires a

110–115 Volt AC electrical outlet with a

grounded, three-wire extension cord.

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

Ú

page 322.

CAUTION!

Do not crank engine for more than 25 seconds

at a time or starter motor damage may result.

Turn the ignition switch to the OFF position and

wait at least two minutes for the starter to cool

before repeating start procedure.

4

110

STARTING AND OPERATING

NOTE:

The engine block heater cord is a factory installed

option. If your vehicle is not equipped, heater cords

are available from an authorized Mopar® dealer.



A 12 Volt heater built into the fuel filter housings

aid in preventing fuel gelling. It is controlled by a

built-in thermostat.



An intake air heater system both improves

engine starting and reduces the amount of

white smoke generated by a warming engine.

N

ORMAL

S

TARTING

P

ROCEDURE

—

E

NGINE

M

ANIFOLD

A

IR

T

EMPERATURE

A

BOVE

66°F (19°C)

Observe the instrument panel cluster lights when

starting the engine.
1. Always apply the parking brake.
2. Shift into PARK for an automatic transmission.
3. Place the ignition switch in the ON position and

watch the instrument panel cluster lights.

4. Place the ignition switch in the START position

and crank the engine. Do not press the

accelerator during starting.

5. Check that the oil pressure warning light has

turned off.

6. Release the parking brake.

S

TARTING

P

ROCEDURE

— E

NGINE

M

ANIFOLD

A

IR

T

EMPERATURE

0°F T

O

66°F (–18°C

TO

19°C)

NOTE:

The temperature displayed in the instrument

cluster does not necessarily reflect the engine

manifold air temperature

Ú

page 78. When

engine temperatures fall below 66°F (19°C) the

“Wait To Start” telltale will remain on indicating the

intake air heater system is active.

Follow the steps in the “Normal Starting”

procedure except:
1. The “Wait to Start” telltale will remain on for a

period of time that varies depending on the

engine temperature.

2. While the “Wait to Start” telltale is on, the

instrument cluster will additionally display a

gauge or bar whose initial length represents

the full “Wait to Start” time period. Its length

will decrease until it disappears when the

“Wait to Start” time has elapsed.

3. After the “Wait to Start” telltale goes off, place

the ignition switch in the START position. Do

not press the accelerator during starting.

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

Ú

page 322.

CAUTION!

Do not crank engine for more than 25 seconds

at a time or starter motor damage may result.

Turn the ignition switch to the OFF position and

wait at least two minutes for the starter to cool

before repeating start procedure.

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

Ú

page 322.

CAUTION!

Do not crank engine for more than 25 seconds

at a time or starter motor damage may result.

Turn the ignition switch to the OFF position and

wait at least two minutes for the starter to cool

before repeating start procedure.

STARTING AND OPERATING

111

4. After engine start-up, check that the oil

pressure warning light has turned off.

5. Release the parking brake and drive.

NOTE:



Engine idle speed will automatically increase to

1,000 RPM and engage the Variable Geometry

Turbocharger at low coolant temperatures to

improve engine warm-up.



Automatic equipped vehicles with optional

Keyless Enter ‘n Go™ – If the ENGINE START/

STOP button is pushed once while in PARK with

the ignition off and driver’s foot on the brake

pedal, the vehicle will automatically crank and

start after the “Wait to Start” time has elapsed.

If it is desired to abort the start process before it

completes, the driver’s foot should be fully

removed from the brake pedal prior to pushing

the start button again in order for the ignition to

move directly to off.



If the engine stalls, or if the ignition switch is left

ON for more than two minutes after the “Wait To

Start” telltale goes out, reset the intake air

heater by turning the ignition switch to the OFF

position for at least five seconds and then back

ON. Repeat steps 1 through 5 of “Starting Proce

-

dure – Engine Manifold Air Temperature 0°F To

66°F (–18°C to 19°C).”

S

TARTING

P

ROCEDURE

— E

NGINE

M

ANIFOLD

A

IR

T

EMPERATURE

B

ELOW

0°F (-18°C)

In extremely cold weather below 0°F (-18°C) it

may be beneficial to cycle the intake air heater

twice before attempting to start the engine. This

can be accomplished by turning the ignition off for

at least five seconds and then back ON after the

“Wait to Start” telltale has turned off, but before

the engine is started. However, excessive cycling of

the intake air heater will result in damage to the

heater elements or reduced battery voltage.

NOTE:

If multiple pre-heat cycles are used before starting,

additional engine run time may be required to

maintain battery state of charge at a satisfactory

level.
1. If the engine stalls after the initial start, the

ignition must be turned to the OFF position for

at least five seconds and then to the ON

position to recycle the intake air heater.

NOTE:

Excessive white smoke and poor engine perfor

-

mance will result if intake air heater is not recycled.
2. Heat generated by the intake air heater

dissipates rapidly in a cold engine. If more than

two minutes pass between the time the “Wait

to Start” telltale turns off and the engine is

started, recycle the intake air heater by turning

the ignition switch to the OFF position for at

least five seconds and then back ON.

3. If the vehicle is driven and vehicle speed

exceeds 19 mph (31 km/h) before the intake

air heater post-heat (after start) cycle is

complete, the intake air heater will shut off.

4. If the engine is cranked for more than

10 seconds, the post-heat cycle will turn off.

NOTE:



Engine idle speed will automatically increase to

1,000 RPM and engage the Variable Geometry

Turbocharger at low coolant temperatures to

improve engine warm-up.



When a diesel engine is allowed to run out of

fuel or the fuel gels at low temperatures, air is

pulled into the fuel system. If your engine has

run out of fuel

Ú

page 324.



If the engine stalls, or if the ignition switch is left

ON for more than two minutes after the “Wait to

Start” telltale goes out, reset the intake air

heater by turning the ignition switch to the OFF

position for at least five seconds and then back

ON. Repeat steps 1 through 5 of “Starting Proce

-

dure – Engine Manifold Air Temperature 0°F to

60°F (-18°C to 19°C).”

4

112

STARTING AND OPERATING

S

TARTING

F

LUIDS

The engine is equipped with an automatic electric

air preheating system. If the instructions in this

manual are followed, the engine should start in all

conditions.

NORMAL OPERATION — DIESEL ENGINE

Observe the following when the engine is

operating.



All message center lights are off.



Malfunction Indicator Light (MIL) is off.



Engine oil pressure is above 10 psi (69 kPa) at

idle.



Voltmeter operation:

The voltmeter may show a gauge fluctuation at

various engine temperatures. This cycling

operation is caused by the post-heat cycle of the

intake manifold heater system. The number of

cycles and the length of the cycling operation is

controlled by the engine control module. Post-heat

operation can run for several minutes, and then

the electrical system and voltmeter needle will

stabilize.
The cycling action will cause temporary dimming of

the headlamps, interior lamps, and also a

noticeable reduction in blower motor speed.

WARNING!

Starting fluids or flammable liquids must never

be used in the Cummins diesel engine (see

Warning label). Never pour diesel fuel,

flammable liquid, starting fluids (ether) into the

air cleaner canister, air intake piping, or

turbocharger inlet in an attempt to start the

vehicle. This could result in a flash fire and

explosion causing serious personal injury and

engine damage.

WARNING!



Do not leave children or animals inside parked

vehicles in hot weather. Interior heat build-up

may cause serious injury or death.



When leaving the vehicle, always remove the

key fob and lock your vehicle.



Never leave children alone in a vehicle, or with

access to an unlocked vehicle. Allowing chil

-

dren 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 gear

selector. Do not leave the key fob in or near

the vehicle (or in a location accessible to chil

-

dren), 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

operate power windows, other controls, or

move the vehicle.

STARTING AND OPERATING

113

C

OLD

W

EATHER

P

RECAUTIONS

Operation in ambient temperature below 32°F

(0°C) may require special considerations. The

following charts suggest these options:

Fuel Operating Range

NOTE:

Use “Ultra Low Sulfur Diesel (ULSD) Fuels” ONLY.

Fuel Operating Range Chart

*Number 1 ULSD Fuel should only be used where

extended arctic conditions (0°F/-18°C) exist”.

NOTE:



Use of Climatized ULSD or Number 1 ULSD Fuel

results in a noticeable decrease in fuel economy.



Climatized ULSD Fuel is a blend of Number 2

ULSD and Number 1 ULSD Fuels which reduces

the temperature at which wax crystals form in

fuel.



The fuel grade should be clearly marked on the

pump at the fuel station.



The engine requires the use of “ULSD Fuel”. Use

of incorrect fuel could result in engine and

exhaust system damage

Ú

page 373.



If climatized or diesel Number 1 ULSD Fuel is

not available, and you are operating below

(20°F/-6°C), in sustained arctic conditions,

Mopar® Premium Diesel Fuel Treatment (or

equivalent) is recommended to avoid gelling

(see Fuel Operating Range Chart).



Under some circumstances increased engine

noise may be audible in the seconds following a

cold start. This is most likely to occur when using

fuel that isn't blended for the ambient tempera

-

ture present. This may occur on an unseason

-

ably cold day or when a truck is fueled in a

warmer climate and driven to a colder climate.

The noise can typically be prevented by using

Mopar Premium Diesel Fuel Treatment as

recommended (see Fuel Operating Range

Chart).

Engine Oil Usage

For the correct engine oil viscosity

Ú

page 315.

Winter Front Cover Usage

A Winter front or cold weather cover is to be used

in ambient temperatures below 32°F (0°C),

especially during extended idle conditions. This

cover is equipped with four flaps for managing

total grille opening in varying ambient

temperatures. If a Winter front or cold weather

cover is to be used the flaps should be left in the

full open position to allow air flow to the charge air

cooler and automatic transmission oil cooler.

When ambient temperatures drop below 0°F

(-17°C) the four flaps need to be closed. A suitable

cold weather cover is available from a Mopar

dealer.

Battery Blanket Usage

A battery loses 60% of its cranking power as the

battery temperature decreases to 0°F (-18°C). For

the same decrease in temperature, the engine

requires twice as much power to crank at the same

RPM. The use of 120 Volts AC powered battery

blankets will greatly increase starting capability at

low temperatures. Suitable battery blankets are

available from an authorized Mopar dealer.

4

114

STARTING AND OPERATING

Engine Warm-Up

Avoid full throttle operation when the engine is

cold. When starting a cold engine, bring the engine

up to operating speed slowly to allow the oil

pressure to stabilize as the engine warms up.

NOTE:

High-speed, no-load running of a cold engine can

result in excessive white smoke and poor engine

performance. No-load engine speeds should be

kept under 1,000 RPM during the warm-up period,

especially in cold ambient temperature conditions.
Your vehicle is equipped with an engine warm-up

protection feature that may limit engine

performance after cold starting at low ambient

temperatures. The length of time engine speed is

limited is dependent upon engine coolant

temperature. Engine speed may be briefly limited

to 1,000 RPM after starting with coolant

temperature below freezing conditions, and may

be limited to 1,000 RPM for up to approximately

two minutes under more severe cold conditions.

NOTE:

If ambient temperatures are low and the coolant

temperature is below 180°F (82°C), the engine

idle speed will slowly increase to 1,000 RPM after

two minutes of idle, if the following conditions are

met:



Foot is off brake pedal and throttle pedal.



Automatic transmission is in PARK.



Vehicle speed is 0 mph (0 km/h).



Applying the throttle will cancel fast idle.



Operating the exhaust brake at idle will greatly

improve warm-up rate and will help keep the

engine close to operating temperature during

extended idle.

E

NGINE

I

DLING

Avoid prolonged idling, long periods of idling may

be harmful to your engine because combustion

chamber temperatures can drop so low that the

fuel may not burn completely. Incomplete

combustion allows carbon and varnish to form on

piston rings, engine valves, and injector nozzles.

Also, the unburned fuel can enter the crankcase,

diluting the oil and causing rapid wear to the

engine.
If the engine is allowed to idle or the truck is driven

on low engine speed drive cycles for more than two

hours, the system will automatically enter an

emissions operating mode that will increase the

engine idle speed to 900 RPM (1,050 RPM for

Chassis Cab). While in this mode, which is

designed to help maintain the Diesel Particulate

Filter, the engine idle speed will return to normal

when the brake pedal is applied. A small change in

engine tone or a slight change in engine

performance while accelerating may also be

noticeable at speeds below 20 mph (32 km/h).

This operating mode may last for up to an hour of

idle time, or around 20 minutes of driving time.
Your truck may have been ordered with an optional

voltage monitoring idle up feature. If a load is

placed on the electrical system while the truck is in

PARK, this feature will attempt to maintain normal

system voltage by automatically increasing engine

idle speed. You may notice several consecutive

increases in idle speed, up to a maximum of

1,450 RPM, as the system will attempt to utilize

the smallest increase in idle speed necessary to

maintain normal system voltage. The idle speed

will return to normal when either the electrical load

is removed, or when the brake pedal is applied.

NOTE:

For instrument cluster display messages related to

the vehicle's exhaust system

Ú

page 78.

Idle-Up Feature

The driver-controlled high idle speed feature will

help increase cylinder temperatures and provide

additional cab heat, however, excessive idling may

still cause the exhaust after-treatment system to

not properly regenerate. Extended periods of idle

time should be avoided.
The Idle-Up feature uses the Cruise Control buttons

to increase engine idle speed and quickly warm the

vehicle's interior.

STARTING AND OPERATING

115

1. With the transmission in PARK, the parking

brake applied, and the engine running, turn

on the Cruise Control, then push the SET (-)

button.

2. The engine RPM will go up to 1,100 RPM. To

increase the RPM, push and hold the RES (+)

button and the idle speed will increase to

approximately 1,500 RPM. To decrease the

RPM, push and hold the SET (-) button and the

idle speed will decrease to approximately

1,100 RPM.

3. To cancel the Idle–Up feature, either push the

CANCEL button, push the ON/OFF button, or

press the brake pedal.

N

OISE

Diesel engines can create noises that may seem

as a concern. The nature of a diesel engine is

compression ignition where compressed air and

fuel are mixed and ignited. Weather, barometric

pressure, altitude and temperature will affect how

fuel is ignited in the engine. Engines will sound

different from day to day or previous model years.

Clicking, ticking, or light knocking is normal and will

change from day to day, as the engine breaks in,

and can vary with changes in ambient

temperature; this is normal. Diesel equipped

vehicles also have an exhaust after treatment

system to reduce emissions utilizing a Diesel

Particulate Filter (DPF) and a Selective Reduction

Catalyst (SCR). The SCR reduces Nox using the

Diesel Exhaust Fluid (DEF) system. DEF is injected

directly into the SCR through an dosing module.

This process will create a clicking sound and at

times, will make noise even with the vehicle shut

off. This is normal as the DEF dosing module is

purging DEF. Fuel pump noise may increase during

low speed/light load conditions when ambient

temperature is above 100°F (38°C), and when

fuel tank level is below 10%. This is a normal

condition of the fuel system and controls strategy.

If at any time the check engine light is on, please

visit an authorized dealer.

S

TOPPING

T

HE

E

NGINE

Idle the engine a few minutes before routine

shutdown. After full load operation, idle the engine

three to five minutes before shutting it down. This

idle period will allow the lubricating oil and coolant

to carry excess heat away from the combustion

chamber, bearings, internal components, and

turbocharger. This is especially important for

turbocharged, charge air-cooled engines. Refer to

the following chart for proper engine shutdown:

Driving Condition

Load

Turbocharger Temperature

Idle Time (min.) Before Engine

Shutdown

Stop and Go

Empty

Cool

Less than One

Stop and Go

Medium

-

One

Highway Speeds

Medium

Warm

Two

City Traffic

Maximum GCWR

-

Three

Highway Speeds

Maximum GCWR

-

Four

Uphill Grade

Maximum GCWR

Hot

Five

4

116

STARTING AND OPERATING

I

DLE

S

HUTDOWN

This feature can be enabled so that the truck will

automatically shutdown when the truck has been

idling for a set period of time when the engine is at

operating temperature. Idle time can be set in

5 minute increments between 5 and 60 minutes.

See an authorized dealer to enable this feature.

NOTE:

The idle shut down timer is disabled while the PTO

(Power Take-off) is active.

P

ROGRAMMABLE

M

AXIMUM

V

EHICLE

S

PEED

This feature allows the owner to set a maximum

vehicle speed for the vehicle. The 3500 Series

maximum vehicle speed can be set between

40 mph to 87 mph (64 km/h to 140 km/h). The

4500/5500 Series maximum vehicle speed can

be set between 40 mph to 85 mph (64 km/h to

136 km/h). See an authorized dealer to enable

this feature.

NOTE:

DO NOT set the maximum vehicle speed to a value

greater than what the vehicle tires are rated for.

O

PERATING

P

RECAUTIONS

Avoid Overheating The Engine

The temperature of the engine coolant (antifreeze:

a mixture of 50% ethylene-glycol and 50% water)

must not exceed the normal range of the

temperature gauge 240°F (116°C) with a 21 psi

(145 kPa) coolant pressure cap.
Usually the engine coolant (antifreeze)

temperature indicated during operation will be to

the left of center in the normal range of the gauge.

Avoid Low Coolant Temperature Operation

Continual operation at low engine coolant

(antifreeze) temperature below the normal range

on the gauge 140°F (60°C) can be harmful to the

engine. Low engine coolant (antifreeze)

temperature can cause incomplete combustion

which allows carbon and varnish to form on piston

rings and injector nozzles. Also, the unburned fuel

can enter the crankcase, diluting the lubricating oil

and causing rapid wear to the engine.

C

OOLING

S

YSTEM

T

IPS

To reduce potential for engine and transmission

overheating in high ambient temperature

conditions, take the following actions:



City Driving — When stopped, shift the transmis

-

sion into NEUTRAL and increase engine idle

speed.



Highway Driving — Reduce your speed.



Up Steep Hills — Select a lower transmission

gear.



Air Conditioning — Turn it off temporarily.

Do Not Operate The Engine With Low Oil

Pressure

When the engine is at normal operating

temperature, the minimum oil pressures required

are:

Idle 700 to 800 RPM

10 psi (69 kPa)

Full speed and load

30 psi (207 kPa)

CAUTION!

If oil pressure falls to less than normal readings,

shut the engine off immediately. Failure to do so

could result in immediate and severe engine

damage.

STARTING AND OPERATING

117

Do Not Operate The Engine With Failed

Parts

All engine failures give some warning before the

parts fail. Be on the alert for changes in

performance, sounds, and visual evidence that the

engine requires service. Some important clues are:



Engine misfiring or vibrating severely.



Sudden loss of power.



Unusual engine noises.



Fuel, oil or coolant leaks.



Sudden change, outside the normal operating

range, in the engine operating temperature.



Excessive smoke.



Oil pressure drop.

D

IESEL

P

ARTICULATE

F

ILTER

(DPF)

M

ANUAL

R

EGENERATION

- I

F

E

QUIPPED

On equipped Chassis Cabs, a manual regeneration

can be enable through the instrument cluster. The

manual regeneration will allow the DPF to

complete a regeneration, lowering the soot level

without having to drive the vehicle. The vehicle

must be in PARK to access this feature, and the

fuel level must be over 12.5% full. A message

displaying the time left on the regeneration will

appear on the instrument cluster, and the

instrument cluster will display the soot level

Ú

page 78.

ENGINE BLOCK HEATER — IF EQUIPPED

The engine block heater warms the engine, and

permits quicker starts in cold weather. Connect the

cord to a standard 110-115 Volt AC electrical

outlet with a grounded, three-wire extension cord.
Gas Engine Only
The engine block heater cord is routed through the

grille by the right front tow hook.
It includes a removable cap that is secured by a

tethered strap. It also has a c-clip that is used for

storage when not in use for the Winter months.

During Winter months, remove the heater cord

wiring assembly from itself on the c-clip.
The engine block heater must be plugged in at

least one hour to have an adequate warming effect

on the engine.

Diesel Engine Only
The engine block heater warms engine coolant and

permits quicker starts in cold weather. Connect the

heater cord to a ground-fault interrupter protected

110–115 Volt AC electrical outlet with a grounded,

three-wire extension cord.
The engine block heater cord is routed under the

hood to the right side and can be located just

behind the grille near the headlamp.

NOTE:

The engine block heater cord is a factory installed

option. If your vehicle is not equipped, heater cords

are available from an authorized Mopar® dealer.
The block heater must be plugged in at least one

hour to have an adequate warming effect on the

coolant.

NOTE:

The block heater will require 110 Volts AC and

6.5 Amps to activate the heater element.
Block Heater Usage
For ambient temperatures below 0°F (-18°C),

engine block heater usage is recommended.
For ambient temperatures below –20°F (-29°C),

engine block heater usage is required.

WARNING!

Remember to disconnect the engine block

heater cord before driving. Damage to the

110-115 Volt electrical cord could cause electro

-

cution.

WARNING!

Remember to disconnect the engine block

heater cord before driving. Damage to the

110-115 Volt electrical cord could cause electro

-

cution.

4

118

STARTING AND OPERATING

ENGINE BREAK-IN RECOMMENDATIONS —

GASOLINE ENGINE

A long break-in period is not required for the engine

and drivetrain (transmission and axle) in your

vehicle.
Drive moderately during the first 300 miles

(500 km). After the initial 60 miles (100 km),

speeds up to 50 or 55 mph (80 or 90 km/h) are

desirable.
While cruising, brief full-throttle acceleration within

the limits of local traffic laws contributes to a good

break-in. Wide-open throttle acceleration in low

gear can be detrimental and should be avoided.
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. For the recommended viscosity and

quality grades

Ú

page 379.

NOTE:

A new engine may consume some oil during its first

few thousand miles (kilometers) of operation. This

should be considered a normal part of the break-in

and not interpreted as a problem. Please check

your oil level with the engine oil indicator often

during the break in period. Add oil as required.

ENGINE BREAK-IN RECOMMENDATIONS —

DIESEL ENGINE

The Cummins® Turbo 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 significant weight.

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.

For additional vehicle break-in requirements

Ú

page 174.

Because of the construction of the Cummins®

Turbo Diesel engine, engine run-in is enhanced by

loaded operating conditions which allow the

engine parts to achieve final finish and fit during

the first 6,000 miles (10,000 km).

PARKING BRAKE

Before leaving the vehicle, make sure that the

parking brake is fully applied. Also, be certain to

leave the transmission in PARK.
The foot operated parking brake is located below

the lower left corner of the instrument panel. To

apply the parking brake, firmly push the parking

brake pedal fully. To release the parking brake, pull

the parking brake release handle.

Parking Brake Release

CAUTION!

Never use Non-Detergent Oil or Straight Mineral

Oil in the engine or damage may result.

STARTING AND OPERATING

119

When the parking brake is applied with the ignition

switch ON, the “Brake Warning Light” in the

instrument cluster will illuminate.

NOTE:



When the parking brake is applied and the

transmission is placed in gear, the “Brake

Warning Light” will flash. If vehicle speed is

detected, a chime will sound to alert the driver.

Fully release the parking brake before

attempting to move the vehicle.



This light only shows that the parking brake is

applied. It does not show the degree of brake

application.

When parking on a hill, it is important to turn the

front wheels toward the curb on a downhill grade

and away from the curb on an uphill grade. Apply

the parking brake before placing the gear selector

in PARK, otherwise the load on the transmission

locking mechanism may make it difficult to move

the gear selector out of PARK. The parking brake

should always be applied whenever the driver is

not in the vehicle.

DIESEL EXHAUST BRAKE

(ENGINE BRAKING)

The purpose of the exhaust brake (engine braking)

feature is to supply negative (braking) torque from

the engine. Typically, the engine braking is used

for, but not limited to, vehicle towing applications

where vehicle braking can be achieved by the

internal engine power, thereby sparing the

mechanical brakes of the vehicle.
Benefits of the exhaust brake are:



Vehicle driving control.



Reduced brake fade.



Longer brake life.



Faster cab warm-up.

The exhaust brake feature will only function when

the driver toggles it on by pushing the exhaust

brake button until the "Exhaust Brake Indicator" is

illuminated. Normal (Full Strength) exhaust brake

mode is indicated by a yellow "Exhaust Brake

Indicator".

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.



Never leave children alone in a vehicle, or with

access to an unlocked vehicle. Leaving unat

-

tended children in a vehicle is dangerous for a

number of reasons. A child or others could be

seriously or fatally injured.



Do not leave the key fob in or near the vehicle,

or in a location accessible to children, and do

not leave 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.



Be sure the parking brake is fully disengaged

before driving; failure to do so can lead to

brake failure and a collision.



Always fully apply the parking brake when

leaving your vehicle or it may roll and cause

damage or injury. Also, be certain to leave the

transmission in PARK. Failure to do so may

cause the vehicle to roll and cause damage or

injury.

CAUTION!

If the Brake System Warning Light remains on

with the parking brake released, a brake system

malfunction is indicated. Have the brake system

serviced by an authorized dealer immediately.

4

120

STARTING AND OPERATING

(Continued)

Exhaust Brake Switch

Once the "Exhaust Brake Indicator” is illuminated

and the vehicle is moving faster than 5 mph

(8 km/h); the exhaust brake will automatically

operate when the driver removes pressure from

the accelerator pedal. Exhaust braking is most

effective when the engine RPM is higher. The

automatic transmission will downshift more

aggressively in TOW/HAUL mode when the exhaust

brake is enabled to increase brake performance.

NOTE:

For optimum braking power it is recommended to

use the exhaust brake while in TOW/HAUL mode.
The exhaust brake feature can also be used to

reduce the engine warm-up time. To use the

exhaust brake as a warm-up device, the vehicle

must be stopped or moving less than 5 mph

(8 km/h), the "Exhaust Brake Indicator" must be

on, and the coolant temperature must be below

180°F (82°C) and ambient temperature below

60°F (16°C).
Automatic “Smart” Exhaust Brake
Automatic “Smart” Exhaust Brake technology

delivers smoother, less aggressive exhaust

braking characteristics during downhill descents.

Although it can apply full exhaust braking force if

needed, Automatic “Smart” Exhaust Brake may

not apply obvious braking if the vehicle speed is

not increasing. Automatic “Smart” Exhaust Brake

is intended to maintain vehicle speed, while Full

Exhaust Brake is intended to reduce vehicle speed.
Automatic “Smart” Exhaust Brake can be enabled

by pushing the exhaust brake button (on the center

stack) again anytime after the normal Full Exhaust

Brake has been turned on. The “Exhaust Brake

Indicator” in the instrument cluster display will

change from Yellow to Green when Automatic

“Smart” Exhaust Brake is enabled. Pushing the

exhaust brake button again will toggle the exhaust

brake mode to off.

AUTOMATIC TRANSMISSION

You must press and hold the brake pedal while

shifting out of PARK.

WARNING!

Do not use the exhaust brake feature when

driving in icy or slippery conditions as the

increased engine braking can cause the rear

wheels to slide and the vehicle to swing around

with the possible loss of vehicle control, which

may cause an accident possibly resulting in

personal injury or death.

CAUTION!

Use of aftermarket exhaust brakes is not

recommended and could lead to engine damage

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 reverse. 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.



The transmission may not engage PARK if the

vehicle is moving. Always bring the vehicle to a

complete stop before shifting to PARK, and

verify that the transmission gear position indi

-

cator solidly indicates PARK (P) without

blinking. Ensure that the vehicle is completely

stopped, and the PARK position is properly

indicated, before exiting the vehicle.

STARTING AND OPERATING

121

(Continued)

I

GNITION

P

ARK

I

NTERLOCK

This vehicle is equipped with an Ignition Park

Interlock which requires the transmission to be in

PARK before the ignition can be turned to the OFF

mode. This helps the driver avoid inadvertently

leaving the vehicle without placing the

transmission in PARK. This system also locks the

transmission in PARK whenever the ignition is in

the OFF mode.

NOTE:

The transmission is NOT locked in PARK when the

ignition is in the ACC mode (even though the

engine will be off). Ensure that the transmission is

in PARK, and the ignition is OFF (not in ACC mode)

before exiting the vehicle.

B

RAKE

/T

RANSMISSION

S

HIFT

I

NTERLOCK

(BTSI) S

YSTEM

This vehicle is equipped with a BTSI system that

holds the transmission gear selector in PARK

unless the brakes are applied. For vehicles with

8-speed transmission, to shift the transmission out

of PARK, the engine must be running and the brake

pedal must be pressed. The brake pedal must also

be pressed to shift from NEUTRAL into DRIVE or

REVERSE when the vehicle is stopped or moving at

low speeds. For vehicles with 6-speed

transmission, to shift the transmission out of



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 come to a complete stop, then 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 unwanted 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 use the PARK position as a substitute

for the parking brake. Always apply the

parking brake fully when exiting the vehicle 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 trans

-

mission is in PARK before exiting the vehicle.

WARNING!



Never leave children alone in a vehicle, or with

access to an unlocked vehicle. Allowing chil

-

dren 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 transmis

-

sion 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.

CAUTION!



Shift into or out of PARK or REVERSE only after

the vehicle has come to a complete stop.



Do not shift between PARK, REVERSE,

NEUTRAL, or DRIVE when the engine is above

idle speed.



Before shifting into any gear, make sure your

foot is firmly pressing the brake pedal.

WARNING!

4