Dodge 3500 Diesel (2008 year). Manual — part 17
Operating Tips
Fast Cooldown
For a fast cooldown, turn the blower fan rotary knob to
the extreme right position, turn the mode control to the
panel fresh position, press the snowflake button to turn
on the air conditioning, and drive with the windows
open for the first few minutes. Once the hot air has been
expelled, close the windows and press the recirculation
pushbutton, on dual-zone control, or switch the mode
from panel/fresh to panel/recirculate on single-zone
control. When a comfortable condition has been reached,
choose a mode position and adjust the temperature
control slide and blower speed as necessary to maintain
comfort. For high humidity conditions it may be neces-
sary to remain in the Recirculation mode to maintain
comfort.
Window Fogging
Windows will fog on the inside when the humidity inside
the vehicle is high. This often occurs in mild or cool
temperatures when it’s rainy or humid. In most cases
turning on the air conditioning (pressing the snowflake
button) will clear the fog. Adjust the temperature control,
air direction and blower speed to maintain comfort.
As the temperature gets colder it may be necessary to
direct air onto the windshield by using MIX Mode
position on the control. Adjust the temperature control
and blower speed to maintain comfort. Higher blower
speeds will reduce fogging. Interior fogging on the
windshield can be quickly removed by selecting the
defrost mode.
Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.
260
UNDERSTANDING YOUR INSTRUMENT PANEL
Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50 %
concentration is recommended. For proper coolant type,
refer to “Recommended Fluids and Genuine Parts” in
Section 7.
When using the air conditioner in extremely heavy traffic
in hot weather, especially when towing a trailer, addi-
tional engine cooling may be required. If this situation is
encountered, operate the transmission in a lower gear to
increase engine RPM, coolant flow and fan speed. When
stopped in heavy traffic, it may be necessary to shift into
NEUTRAL and depress the accelerator slightly for fast
idle operation to increase coolant flow and fan speed.
NOTE:
On models equipped with Diesel engines, the
idle speed will automatically increase to 1000 rpm at
elevated coolant temperatures to improve engine cooling.
Your air conditioning system is also equipped with an
automatic recirculation system. When the system senses
a heavy load or high heat conditions, it may use partial
Recirculation A/C mode to provide additional comfort.
Winter Operation
When operating the system during the Winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other obstruc-
tions.
UNDERSTANDING YOUR INSTRUMENT PANEL
261
4
Operating Tips Chart
262
UNDERSTANDING YOUR INSTRUMENT PANEL
STARTING AND OPERATING
CONTENTS
m Starting Procedures – Diesel Engines . . . . . . . . . 268
▫ Automatic Transmission – If Equipped . . . . . . 268
▫ Manual Transmission – If Equipped . . . . . . . . 269
▫ Normal Starting Procedure – Engine Manifold
Air Temperature Above 66°F (19°C) . . . . . . . . 269
▫ Starting Procedure – Engine Manifold Air
Temperature Below 66°F (19°C) . . . . . . . . . . . 270
▫ Starting Fluids . . . . . . . . . . . . . . . . . . . . . . . 274
m Normal Operation (Diesel Engine) . . . . . . . . . . . 274
▫ Cold Weather Precautions . . . . . . . . . . . . . . . 275
▫ Engine Idling . . . . . . . . . . . . . . . . . . . . . . . . 278
▫ Stopping The Engine . . . . . . . . . . . . . . . . . . . 280
▫ Engine Speed Control . . . . . . . . . . . . . . . . . . 281
▫ Operating Precautions . . . . . . . . . . . . . . . . . . 281
▫ Cooling System Tips — Automatic
Transmission . . . . . . . . . . . . . . . . . . . . . . . . 281
m Diesel Exhaust Brake (Engine Braking) –
If Equipped . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
m Transmission Shifting . . . . . . . . . . . . . . . . . . . . 285
▫ Automatic Transmission With Overdrive
(68RFE) — If Equipped . . . . . . . . . . . . . . . . . 285
5
m Manual Transmission . . . . . . . . . . . . . . . . . . . . 291
▫ Shifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
▫ Downshifting . . . . . . . . . . . . . . . . . . . . . . . . 293
▫ Reverse Shifting . . . . . . . . . . . . . . . . . . . . . . 294
m Four–Wheel Drive Operation — If Equipped . . . 294
▫ Manually Shifted Transfer Case Operating
Information/Precautions . . . . . . . . . . . . . . . . 294
▫ Shifting Procedure - Manually Shifted Transfer
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
▫ Transfer Case Reminder Light . . . . . . . . . . . . 298
▫ Electronically Shifted Transfer Case Operating
Information/Precautions (4 Position Switch) —
If Equipped . . . . . . . . . . . . . . . . . . . . . . . . . 299
▫ Shifting Procedure — Electronically Shifted
Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . 303
m Limited-Slip Differential — If Equipped . . . . . . . 306
m Driving On Slippery Surfaces . . . . . . . . . . . . . . 307
m Driving Through Water . . . . . . . . . . . . . . . . . . 307
▫ Flowing/Rising Water . . . . . . . . . . . . . . . . . . 307
▫ Shallow Standing Water . . . . . . . . . . . . . . . . . 308
m Driving Off-Road . . . . . . . . . . . . . . . . . . . . . . . 309
m Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 310
m Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . 312
▫ Brake Noise . . . . . . . . . . . . . . . . . . . . . . . . . 312
▫ Four-Wheel Anti-Lock Brake System . . . . . . . . 313
m Power Steering . . . . . . . . . . . . . . . . . . . . . . . . 315
m Tire Safety Information . . . . . . . . . . . . . . . . . . . 316
▫ Tire Markings . . . . . . . . . . . . . . . . . . . . . . . . 316
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STARTING AND OPERATING
▫ Tire Identification Number (TIN) . . . . . . . . . . 319
▫ Tire Loading And Tire Pressure . . . . . . . . . . . 320
m Tires — General Information . . . . . . . . . . . . . . . 324
▫ Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 324
▫ Tire Inflation Pressures . . . . . . . . . . . . . . . . . 325
▫ Radial Ply Tires . . . . . . . . . . . . . . . . . . . . . . 327
▫ Compact Spare Tire — If Equipped . . . . . . . . . 328
▫ Limited-Use Spare — If Equipped . . . . . . . . . 328
▫ Tire Spinning . . . . . . . . . . . . . . . . . . . . . . . . 329
▫ Tread Wear Indicators . . . . . . . . . . . . . . . . . . 330
▫ Life Of Tire . . . . . . . . . . . . . . . . . . . . . . . . . 330
▫ Replacement Tires . . . . . . . . . . . . . . . . . . . . . 331
▫ Alignment And Balance . . . . . . . . . . . . . . . . . 332
m Supplemental Tire Pressure Information — If
Equipped . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
m Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
m Snow Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 335
m Tire Rotation Recommendations . . . . . . . . . . . . 335
▫ Dual Rear Wheels . . . . . . . . . . . . . . . . . . . . . 337
m Tire Pressure Monitor System (TPMS) —
If Equipped . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
▫ Tire Pressure Monitor System (TPMS) “Light
Load” Reset Switch Description –
If Equipped . . . . . . . . . . . . . . . . . . . . . . . . . 341
▫ Tire Pressure Monitor System Components . . . 344
▫ General Information . . . . . . . . . . . . . . . . . . . 347
m Engine Runaway . . . . . . . . . . . . . . . . . . . . . . . 347
STARTING AND OPERATING
265
5
m Fuel Requirements . . . . . . . . . . . . . . . . . . . . . . 348
▫ Fuel Requirements (6.7L Diesel Engines) . . . . . 348
m Adding Fuel (Diesel Engines) . . . . . . . . . . . . . . 349
▫ Fuel Filler Cap (Gas Cap) . . . . . . . . . . . . . . . 350
▫ Bulk Fuel Storage . . . . . . . . . . . . . . . . . . . . . 351
m Vehicle Loading . . . . . . . . . . . . . . . . . . . . . . . . 352
▫ Certification Label . . . . . . . . . . . . . . . . . . . . . 352
m Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . 356
▫ Common Towing Definitions . . . . . . . . . . . . . 356
▫ Trailer Hitch Classification . . . . . . . . . . . . . . . 360
▫ Trailer Towing Weights (Maximum Trailer
Weight Ratings) . . . . . . . . . . . . . . . . . . . . . . 361
▫ Trailer And Tongue Weight . . . . . . . . . . . . . . 361
▫ Towing Requirements . . . . . . . . . . . . . . . . . . 362
▫ Towing Tips . . . . . . . . . . . . . . . . . . . . . . . . . 368
▫ Trailer Towing Mirrors — If Equipped . . . . . . 370
m Snowplow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
▫ Before Plowing . . . . . . . . . . . . . . . . . . . . . . . 372
▫ Snowplow Prep Package Model Availability . . 372
▫ Over The Road Operation With Snowplow
Attached . . . . . . . . . . . . . . . . . . . . . . . . . . . 373
▫ Methods For Removing Snow . . . . . . . . . . . . 373
▫ Operating Tips . . . . . . . . . . . . . . . . . . . . . . . 373
▫ General Maintenance . . . . . . . . . . . . . . . . . . . 374
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STARTING AND OPERATING
m Recreational Towing (Behind Motorhome, Etc.) . . 375
▫ Recreational Towing – 2-Wheel Drive
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
▫ Recreational Towing – 4-Wheel Drive
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
STARTING AND OPERATING
267
5
STARTING PROCEDURES – DIESEL ENGINES
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 15-
second intervals. Waiting a few minutes between such
intervals will protect the starter from overheating.
WARNING!
Be sure to turn off the engine and remove the key
from the ignition switch if you want to rest or sleep
in your vehicle. Accidents can be caused by inadvert-
ently moving the shift lever or by pressing the
accelerator pedal. This may cause excessive heat in
the exhaust system, resulting in overheating and
vehicle fire which may cause serious or fatal injuries.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build up may
cause serious injury or death.
Automatic Transmission – If Equipped
Start the engine with the shift lever in NEUTRAL or
PARK position. Apply the brake before shifting to any
driving range.
The Cummins
t 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.
268
STARTING AND OPERATING
NOTE:
The engine block heater cord is a factory in-
stalled option. If your vehicle is not equipped, heater
cords are available from your authorized Mopar
t dealer.
• A 12–volt heater built into the fuel filter housing aids
in preventing fuel gelling. It is controlled by a built-in
thermostat.
• A heated intake air system both improves engine
starting and reduces the amount of white smoke
generated by a warming engine.
Manual Transmission – If Equipped
Apply the parking brake, place the shift lever in NEU-
TRAL and depress the clutch pedal to the floor before
starting the vehicle. This vehicle is equipped with a
clutch interlocking ignition system. It will not start unless
the clutch is fully depressed.
Normal Starting Procedure – Engine Manifold Air
Temperature Above 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. For
vehicles equipped with manual transmissions, fully de-
press and hold the clutch pedal and shift into NEUTRAL.
3. Turn the ignition key to the ON position and watch the
instrument panel cluster lights.
STARTING AND OPERATING
269
5
CAUTION!
If WATER IN FUEL indicator light remains on DO
NOT START engine before you drain water from the
fuel filter to avoid engine damage. Refer to “Drain-
ing Fuel/Water Separator Filter (6.7L Diesel Engine)”
under “Maintenance Procedures” in Section 7.
4. Turn the ignition key to START and crank the engine.
Do not press the accelerator during starting.
CAUTION!
Do not crank engine for more than 15 seconds at a
time as starter motor damage may result. Turn key to
OFF and wait at least two minutes before trying
again.
5. When the engine starts, release the key.
6. Check to see that there is oil pressure.
7. Release the parking brake.
Starting Procedure – Engine Manifold Air
Temperature Below 66°F (19°C)
NOTE:
The temperature displayed on the overhead
console (if equipped) does not necessarily reflect the
engine manifold air temperature. When certain engine
temperatures fall below 66°F (19°C) the lights will remain
on indicating the intake manifold heater system is active.
270
STARTING AND OPERATING
Follow the steps in the Normal Starting Procedure ex-
cept:
CAUTION!
Do not crank engine for more than 15 seconds at a
time or starter motor damage may result. Turn key to
OFF and wait at least two minutes for starter to cool
before repeating start procedure.
• The WAIT TO START light will remain on for a period
of time (length of time depends on engine tempera-
ture).
• After the WAIT TO START light goes off, turn the
ignition key to START. Do not press the accelerator
during starting.
• After engine start-up, check to see that there is oil
pressure.
• Allow the engine to idle about three minutes until
the manifold heaters have completed the post-heat
cycle.
• Release the parking brake and drive.
NOTE:
Engine idle speed will automatically increase to
1000 RPM at low coolant temperatures to improve engine
warm-up.
NOTE:
If the engine stalls or if the ignition switch is left
ON for more than two minutes after the WAIT TO START
light goes out, reset the grid heaters by turning the
ignition switch to OFF for at least five seconds and then
back ON. Repeat steps 3 through 7 of the normal starting
procedure.
STARTING AND OPERATING
271
5
For Extremely Cold Weather Starting — Engine
Manifold Air Temperature Below 0°F (-18°C)
In extremely cold weather below 0°F (-18°C) it may be
beneficial to cycle the manifold heaters 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 light has gone
off, but before the engine is started. However, repeated
cycling of the manifold heaters will result in damage to
the heater elements or reduced battery voltage.
Proceed by following the steps in the Normal Starting
Procedure.
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.
• 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
manifold heaters.
NOTE:
Excessive white smoke and poor engine perfor-
mance will result if manifold heaters are not recycled.
• Heat generated by the manifold heaters dissipates
rapidly in a cold engine. If more than two minutes
pass between the time the WAIT TO START light goes
OFF and the engine is started, recycle the manifold
heaters by turning the ignition OFF for at least five
seconds and then back ON.
• If the vehicle is driven and vehicle speed exceeds 19
mph (31 km/h) before the manifold heater post-heat
(after start) cycle is complete, the manifold heaters will
shut off.
272
STARTING AND OPERATING
• If the engine is started before the WAIT TO START
light turns off, the preheat cycle will turn off.
• 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
1000 RPM at low coolant temperatures to improve engine
warm-up.
NOTE:
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.
You may try priming as described below:
1. Add a substantial quantity of fuel to the tank (5 to 10
gal) (19 to 38 L) or eliminate the gelled fuel condition.
2. Crank the engine for one to two seconds. If the engine
does not start, then turn the ignition back to the RUN
position (do not turn the ignition back to the OFF
position). The electric fuel transfer pump will continue to
run and purge air from the system for about 20 seconds.
After 20 seconds, attempt to start the engine again.
3. Start the engine using the Normal Starting Procedure.
4. Repeat the procedure if the engine does not start.
WARNING!
Do not open the high pressure fuel system when
cranking the engine or with the engine running.
Engine operation causes high fuel pressure. High
pressure fuel spray can cause serious injury or death.
NOTE:
The engine may run rough until the air is forced
from all the fuel lines.
STARTING AND OPERATING
273
5
Starting Fluids
WARNING!
STARTING FLUIDS or flammable liquids are
NEVER TO BE USED in the Cummins
t Diesel (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.
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.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build up may
cause serious injury or death.
NORMAL OPERATION (DIESEL ENGINE)
Observe the following when the engine is operating.
• All message center lights are off.
• Check Engine Lamp is off.
• Engine Oil Pressure is above 10 psi (69 kPa) at idle.
• Low Oil Pressure light is off.
274
STARTING AND OPERATING
• Voltmeter Operation:
1. The voltmeter may show a gauge fluctuation if
certain engine temperatures are below 66°F (19°C).
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.
2. The cycling action will cause temporary dimming of
the headlamps, interior lamps, and also a noticeable
reduction in blower motor speed.
Cold Weather Precautions
Operation in ambient temperature below 32°F (0°C) may
require special considerations. The following charts sug-
gest these options:
Fuel Operating Range (6.7L Diesel Engine)
NOTE:
Use “Ultra Low Sulfur Diesel Fuels” ONLY.
*No. 1 Ultra Low Sulfur diesel fuel should only be used
where extended arctic conditions (-10°F/-23°C) exist.
NOTE:
• Use of Climatized Ultra Low Sulfur Diesel Fuel or
Number 1 Ultra Low Sulfur Diesel Fuel results in a
noticeable decrease in fuel economy.
STARTING AND OPERATING
275
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