2017 Ram 2500 service

•If the vehicle is shutoff and restarted.
• If the vehicle is idled for an extended period of time,
approximately one hour or greater.
• If the system detects that the level of fuel in the tank
has increased.
• Add a minimum of 2 gallons (9.5 Liters) of DEF to the
tank in order to avoid vehicle operation at a maximum
speed of 5 MPH (8 km/H).
NOTE: A minimum of 2 gallons (9.5 Liters) may be
required to restore normal vehicle operation. Although the
vehicle will start normally and can be placed in gear after
this message has been initially displayed, extreme caution
should be utilized since the vehicle will only be capable of
maneuvering at a maximum speed of 5 MPH (8 km/H).
Diesel Exhaust Fluid (DEF) Fault Warning
Messages
There are five different messages which are displayed if the
vehicle detects that the DEF system has been filled with a
fluid other than DEF, has experienced component failures,
or when tampering has been detected. The vehicle may be
limited to a maximum speed of 5 MPH (8 km/H) if the
DEF system is not serviced within less than 200 miles
(322 km) of the fault being detected. When the DEF system needs to be serviced the following
warnings will display:
•
Service DEF System See Dealer — This message will
display when the fault is initially detected, each time the
vehicle is started, and periodically during driving. The
message will be accompanied by a single chime. We
recommend you drive to your nearest authorized dealer
and have your vehicle serviced as soon as possible.
• 5 MPH Max Speed in 150 mi Service DEF System See
Dealer — This message will display if the DEF system
has not been serviced after the “Service DEF System –
See Dealer” message is displayed. This message will
continuously display until the mileage counter reaches
zero, and will be accompanied by a periodic chime. The
message will continue to countdown until it reaches zero
unless the vehicle is serviced. We recommend you drive
to your nearest authorized dealer and have your vehicle
serviced immediately.
NOTE: Under some circumstances this mileage counter
may start with a value of less than 150 miles (241 km). For
example, if recurring faults are detected in a time interval
of less than 40 hours, the counter may restart at the value
where it stopped when a previous fault was temporarily
remedied, or at a minimum of 50 miles (80 km).
4
UNDERSTANDING YOUR INSTRUMENT PANEL 117

•5 MPH Max Speed on Restart, Long Idle or Refuel
Service DEF See Dealer — This message will continu-
ously display when the mileage counter reaches zero,
and will be accompanied by a periodic chime.
• The vehicle will only be capable of a maximum speed of
5 MPH upon the first of the following conditions to
occur:
• If the vehicle is shutoff and restarted.
• If the vehicle is idled for an extended period of time,
approximately one hour or greater.
• If the system detects that the level of fuel in the tank
has increased.
• 5 MPH Max Speed Service DEF System See Dealer —
This message will continuously display, and will be
accompanied by a periodic chime. Although the vehicle
can be started and placed in gear, the vehicle will only
operate at a maximum speed of 5 MPH. Your vehicle
will require towing, see your authorized dealer for
service.
NOTE: When this message is displayed, the engine can
still be started. However, the vehicle will only operate at a
maximum speed of 5 MPH. •
Incorrect DEF Detected See Dealer — This message will
display when the fault is initially detected, each time the
vehicle is started, and periodically during driving. The
message will be accompanied by a single chime. We
recommend you drive to your nearest authorized dealer
and have your vehicle serviced as soon as possible.
RAM Active Air System
Your vehicle is equipped with an advanced Ram Active Air
system that provides enhanced performance, especially
when towing under demanding hot or high altitude con-
ditions. If the Instrument Cluster Display displays the
message “Active Airbox Service Required See Dealer”,
vehicle performance may be reduced until service is per-
formed by an authorized RAM dealer.
118 UNDERSTANDING YOUR INSTRUMENT PANEL

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.
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.
ENGINE BLOCK HEATER — IF EQUIPPED
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 electri-
cal 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 your authorized MOPAR dealer.
The block heater must be plugged in at least one hour to
have an adequate warming effect on the coolant.5
STARTING AND OPERATING 137

NOTE:Use caution when operating a heavily loaded
vehicle at low speeds (such as towing a trailer up a steep
grade, or in stop-and-go traffic) during hot weather. In
these conditions, torque converter slip can impose a sig-
nificant additional heat load on the cooling system. Down-
shifting the transmission to the lowest possible gear (when
climbing a grade), or shifting to NEUTRAL (when stopped
in heavy traffic) can help to reduce this excess heat
generation.
During cold temperatures, transmission operation may be
modified depending on engine and transmission tempera-
ture as well as vehicle speed. This feature improves warm
up time of the engine and transmission to achieve maxi-
mum efficiency. Engagement of the torque converter clutch
is inhibited until the transmission fluid is warm (refer to
the “Note” under “Torque Converter Clutch” in this sec-
tion). On Pickup models with 68RFE transmission, top
overdrive gear is also inhibited until the transmission fluid
is warm, and during extremely cold temperatures (-16°F
[-27°C] or below), operation may briefly be limited to first
and direct gears only. On trucks with AS69RC transmis-
sion, fifth and sixth gears may be inhibited briefly on cold
starts below 41°F (5°C), and during very cold temperatures
(-4°F [-20°C] or below), operation may briefly be limited to
third gear only. During this condition, the ability of the vehicle to accelerate under heavily loaded conditions may
be reduced. In all cases, normal operation will resume once
the transmission temperature has risen to a suitable level.
Transmission Limp Home Mode
Transmission function is monitored electronically for ab-
normal conditions. If a condition is detected that could
result in transmission damage, Transmission Limp Home
Mode is activated. In this mode, the transmission remains
in fourth gear (for 68RFE transmission) or third gear (for
AS69RC transmission) regardless of which forward gear is
selected. If an AS69RC-equipped truck enters Limp Home
Mode at highway speeds, it will initially engage fifth gear,
until the vehicle slows to a speed where third gear can be
engaged. PARK, REVERSE, and NEUTRAL will continue
to operate. The Malfunction Indicator Light (MIL) may be
illuminated. Limp Home Mode allows the vehicle to be
driven to an authorized dealer for service without damag-
ing the transmission.
In the event of a momentary problem, the transmission can
be reset to regain all forward gears by performing the
following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
146 STARTING AND OPERATING

3. Turn the ignition to the OFF position.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the problem is nolonger detected, the transmission will return to normal
operation.
NOTE: Even if the transmission can be reset, we recom-
mend that you visit your authorized dealer at your earliest
possible convenience. Your authorized dealer has diagnos-
tic equipment to determine if the problem could recur.
If the transmission cannot be reset, authorized dealer
service is required.
Electronic Range Select (ERS) Operation
The Electronic Range Select (ERS) shift control allows the
driver to limit the highest available gear when the trans-
mission is in DRIVE. For example, if you set the transmis-
sion gear limit to 4 (fourth gear), the transmission will not
shift above fourth gear, but will shift through the lower
gears normally.
You can switch between DRIVE and ERS mode at any
vehicle speed. When the gear selector is in the DRIVE position, the transmission will operate automatically, shift-
ing between all available gears. Tapping the ERS (-) switch
will activate ERS mode, display the current gear in the
instrument cluster, and set that gear as the top available
gear. Once in ERS mode, tapping the ERS (-) or (+) switch
will change the top available gear.
To exit ERS mode, simply push and hold the ERS (+) switch
until the gear limit display disappears from the instrument
cluster.
Column Gear Selector
5
STARTING AND OPERATING 147

FUEL REQUIREMENTS
Use good quality diesel fuel from a reputable supplier in
your vehicle. Federal law requires that you must fuel this
vehicle with Ultra Low Sulfur Highway Diesel fuel (15
ppm Sulfur maximum) and prohibits the use of Low Sulfur
Highway Diesel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system.
For most year-round service, No. 2 diesel fuel meeting
ASTM (formerly known as the American Society for Test-
ing and Materials) specification D-975 Grade S15 will
provide good performance. If the vehicle is exposed to
extreme cold (below 20°F or -7°C), or is required to operate
at colder-than-normal conditions for prolonged periods,
use climatized No. 2 diesel fuel or dilute the No. 2 diesel
fuel with 50% No. 1 diesel fuel. This will provide better
protection from fuel gelling or wax-plugging of the fuel
filters.
WARNING!
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and
hazardous or explosive when mixed with diesel fuel.Diesel fuel is seldom completely free of water. To prevent
fuel system trouble, drain the accumulated water from the
fuel/water separator using the fuel/water separator drain
provided on both fuel filters. If you buy good quality fuel
and follow the cold weather advice above, fuel condition-
ers should not be required in your vehicle. If available in
your area, a high cetane “premium” diesel fuel may offer
improved cold-starting and warm-up performance.
CAUTION!
If the “Water in Fuel Indicator Light” remains on, DO
NOT START engine before you drain the water from
the fuel filter(s) to avoid engine damage. Refer to
“Maintenance Procedures/Draining Fuel/Water Sepa-
rator Filter” in “Maintaining Your Vehicle” for further
information.
Fuel Specifications
The Cummins diesel engine has been developed to take
advantage of the high energy content and generally lower
cost No. 2 Ultra Low Sulfur diesel fuel or No. 2 Ultra Low
Sulfur climatized diesel fuels. Experience has shown that it
also operates on No. 1 Ultra Low Sulfur diesel fuels or
other fuels within specification.
5
STARTING AND OPERATING 157

NOTE:
•If you accidentally fill the fuel tank with gasoline on
your diesel vehicle, Do not start the vehicle. If you
restart your vehicle you risk damaging the engine and
fuel system. Please call your local dealer for service.
• A maximum blend of 5% biodiesel meeting ASTM
specification D-975 may be used with your Cummins
diesel engine. (Chassis Cab models not configured with
B20 capability.)
• A maximum blend of 20% biodiesel meeting ASTM
specification D-7467 may be used with your Cummins
diesel engine. (Pickup models and Chassis Cab models
configured with B20 Capability.)
• In addition, commercially available fuel additives are
not necessary for the proper operation of your Cummins
diesel engine. However, if seasonably adjusted fuel is
not available and you are operating below 20°F (-6°C),
MOPAR Premium Diesel Fuel Treatment (or equivalent)
may be beneficial to avoid fuel gelling.
• No. 1 Ultra Low Sulfur diesel fuel should only be used
where extended arctic conditions (-10°F or -23°C) exist.Bio-Diesel Fuel Requirements
Chassis Cab Models
A maximum blend of 5% biodiesel meeting ASTM specifi-
cation D975 may be used with your Cummins diesel
engine. If operation with biodiesel blends greater than 5%
but not greater than 20% (B6-B20) is desired, the truck must
first be reconfigured by an authorized Ram dealer and the
provisions in the following section must be adhered to.
Pickup Models And Chassis Cab Models Ordered
With B20 Option
Your vehicle has been validated and approved for the use
of biodiesel in blends up to 20% (B20) provided that you
comply with the requirements outlined below. It is impor-
tant that you understand and comply with these require-
ments. Failure to comply with Oil Change requirements for
vehicles operating on biodiesel blends up to B20 will result
in premature engine wear. Such wear is not covered by the
New Vehicle Limited Warranty.
Biodiesel is a fuel produced from renewable resources
typically derived from animal fat, rapeseed oil (Rapeseed
Methyl Ester (RME) base), or soybean oil (Soy Methyl Ester
(SME or SOME) base). Biodiesel fuel has inherent limita-
tions which require that you understand and adhere to the
158 STARTING AND OPERATING

•Ram PickUp 2500/3500 Only — 15,000 Miles*
• Ram 3500/4500/5500 Chassis Cab — 12,500 Miles*
(*unless otherwise notified with a oil service message)
CAUTION!
•Under no circumstances should oil change intervals
exceed 15,000 miles (24 000 km) pickup or 12,500 miles
(20 000 km) chassis cab if operation occurs with greater
than 5% biodiesel blends. Oil change intervals should
not exceed 6 months in either case. Failure to comply
with these Oil Change requirements for vehicles op-
erating on biodiesel blends up to B20 may result in
premature engine wear. Such wear is not covered by
the New Vehicle Limited Warranty.
• B20 Biodiesel capable: The engine may suffer severe
damage if operated with concentrations of Biodiesel
higher than 20%.
ADDING FUEL — 2500/3500 DIESEL MODELS
1. Open the fuel filler door.
1 — Diesel Exhaust Fluid Fill Location
2 — Diesel Fuel Fill Location
NOTE: There is no fuel filler cap. A flapper door inside the
filler pipe seals the system.
2.
Insert the fuel nozzle fully into the filler pipe – the nozzle
opens and holds the flapper door while refueling.
3. Fill the vehicle with fuel – when the fuel nozzle “clicks” or shuts off the fuel tank is full.
4. Remove the fuel nozzle and close the fuel door.
Diesel Fuel And Diesel Exhaust Fluid Fill Location
160 STARTING AND OPERATING