2022 RAM CHASSIS CAB ignition

346SERVICING AND MAINTENANCE

Filter Cover Removal

5. Remove the cabin air filter by pulling it straight out of the housing.

Cabin Air Filter

6. Install the cabin air filter with the arrow on the filter pointing toward the floor. When installing the filter cover, press on each end until you
hear an audible click.
7. Reinstall the glove compartment on the hinges.
8. Pull the tension tether outward and reinstall the glove compartment past the travel stops by
pushing in on the glove compartment sides.

Glove Compartment

NOTE:Ensure the glove compartment door hinges and
glove compartment travel stops are fully engaged.
9. Reattach the glove compartment tension tether by inserting the tether clip in the glove
compartment and sliding the clip away from
the face of the glove compartment door.
ACCESSORY DRIVE BELT INSPECTION
When inspecting accessory drive belts, small
cracks that run across ribbed surface of belt from
rib to rib, are considered normal. These are not a
reason to replace belt. However, cracks running
1 — Finger Tabs
CAUTION!
The cabin air filter is identified with an arrow to
indicate airflow direction through the filter.
Failure to properly install the filter will result in
the need to replace it more often.
1 — Glove Compartment Travel Stop
2 — Glove Compartment Tension Tether
3 — Glove Compartment Door
WARNING!
Do not attempt to inspect an accessory drive
belt with vehicle running.
When working near the radiator cooling fan,
disconnect the fan motor lead. The fan is
temperature controlled and can start at any
time regardless of ignition mode. You could be
injured by the moving fan blades.
You can be badly injured working on or around
a motor vehicle. Only do service work for which
you have the knowledge and the proper equip -
ment. If you have any doubt about your ability
to perform a service job, take your vehicle to a
competent mechanic.

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SERVICING AND MAINTENANCE347
along a rib (not across) are not normal. Any belt
with cracks running along a rib must be replaced.
Also have the belt replaced if it has excessive wear,
frayed cords or severe glazing.

Accessory Belt (Serpentine Belt)

Conditions that would require replacement:
Rib chunking (one or more ribs has separated
from belt body)
Rib or belt wear
Longitudinal belt cracking (cracks between two
ribs)
Belt slips
“Groove jumping" (belt does not maintain
correct position on pulley)
Belt broken (note: identify and correct problem
before new belt is installed)
Noise (objectionable squeal, squeak, or rumble
is heard or felt while drive belt is in operation)
Some conditions can be caused by a faulty
component such as a belt pulley. Belt pulleys
should be carefully inspected for damage and
proper alignment.
Belt replacement on some models requires the
use of special tools, we recommend having your
vehicle serviced at an authorized dealer.
DRAINING FUEL/WATER SEPARATOR
F
ILTER
There are two fuel filter assemblies. One is located
on the driver's side of the engine. The best access
to this water drain valve is from under the hood.
The second one is on the under body, located in
front of the rear axle above the drive shaft on
pick-up models. The second filter location is on the
frame behind the front axle. The best access to this
water drain valve is from under the vehicle. If water is detected in the water separator while the
engine is running, or while the ignition switch is in
the ON position, the “Water In Fuel Indicator Light”
will illuminate and an audible chime will be heard
five times. At this point you should stop the engine
and drain the water from both of the filters.
If the “Water In Fuel Indicator Light” comes on and
a single chime is heard while you are driving, or
with the ignition switch in the ON position, there
may be a problem with your water separator wiring
or sensor. See an authorized dealer for service.
Upon proper draining of the water from both fuel
filters, the “Water In Fuel Indicator Light” will
remain illuminated for approximately 10 seconds.
If the water was drained while the engine was
running, the “Water In Fuel Indicator Light” may
remain on for approximately three minutes.
NOTE:Care should be taken in disposing of used fluids
from your vehicle. Used fluids, indiscriminately
discarded, can present a problem to the envi
-
ronment. Contact an authorized dealer, service
CAUTION!
Do not drain the fuel/water separator filter
when the engine is running.
Diesel fuel will damage blacktop paving
surfaces. Drain the filter into an appropriate
container.
CAUTION!
If the “Water In Fuel Indicator Light” remains on,
DO NOT START the engine before you drain water
from the fuel filters to avoid engine damage.
8

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348SERVICING AND MAINTENANCE
station, or government agency for advice on recy -
cling programs and for where used fluids and
filters can be properly disposed of in your area.
Drain the fuel/water separator filters when the
“Water In Fuel Indicator Light” is ON. Within
10 minutes of vehicle shutdown, turn the engine
mounted filter drain valve (located on the side of
the filter assembly) counterclockwise a quarter
turn, and turn the under body mounted filter drain
valve (located on the bottom of the filter assembly)
counterclockwise 1 full turn. Then turn the ignition
switch to the ON position, and allow any
accumulated water to drain. Leave the drain valve
open until all water and contaminants have been
removed. When clean fuel is visible, close the drain
valve following these guidelines:

1. Rotate the drain clockwise to close until you feel resistance from the internal seal.

2. Continue turning the drain half of a turn to properly compress the seal.
NOTE:Over-compression of the seal due to overtightening
of the drain will damage the seal, cause a leak, and
require the entire sensor to be replaced.
3. Turn the ignition switch to OFF. The sensor drain should not be overtightened
during normal service operations to avoid internal
damage and future fuel leaks. The drain should be
closed and secured without the use of tools.
If more than a couple ounces/milliliters of fuel
have been drained, follow the directions
Ú
page 350
ENGINE MOUNTED FUEL FILTER
R
EPLACEMENT
NOTE:
Using a fuel filter that does not meet the manu -
facturer's filtration and water separating
requirements can severely impact fuel system
life and reliability.
The engine mounted filter housing is equipped
with a No-Filter-No-Run (NFNR) feature. Engine
will not run if:
No filter is installed.
Inferior/Non-approved filter is used. Use of
OEM filter is required to ensure vehicle will
run.
Engine Mounted Fuel Filter Assembly

1 — Drain Valve
CAUTION!
Diesel fuel will damage blacktop paving
surfaces. Drain the filter into an appropriate
container.
Do not prefill the fuel filter when installing a
new fuel filter. There is a possibility debris
could be introduced into the fuel filter during
this action. It is best to install the filter dry and
allow the in-tank lift pump to prime the fuel
system.

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350SERVICING AND MAINTENANCE
8. Install new o-ring back into ring groove on the filter housing and lubricate with clean engine
oil.
NOTE:Water In Fuel (WIF) sensor is re-usable. Service kit
comes with new o-ring for filter canister and WIF
sensor.
PRIMING IF THE ENGINE HAS RUN OUT
O
F FUEL

1. Add a substantial amount of fuel to the tank,
approximately 2 to 5 gal (8L to 19L).

2. Three priming cycles must be completed. Turn ignition to the RUN position and wait approxi -
mately 30 seconds. This will activate the in tank
fuel pump. Turn the ignition switch to the off
position, and leave off for at least 30 seconds.
Repeat this procedure three times before
cranking the engine.
3. Start the engine using the “Normal Starting”
procedure Ú page 108.
4. Once the engine starts, allow the engine to idle for a minimum of 30 seconds.
NOTE:The engine may run rough until the air is forced
from all the fuel lines.
NOTE:
A maximum blend of 5% biodiesel, meeting
ASTM specification D-975 may be used with
your Cummins® diesel engine.
A maximum blend of 20% biodiesel, meeting
ASTM specification D-7467 may be used with
your Cummins® diesel engine.
Use of biodiesel mixture in excess of 20% can
negatively impact the fuel filter's ability to sepa -
rate water from the fuel, resulting in high pres -
sure fuel system corrosion or damage.
Ethanol blends are not recommended or
approved for use with your Cummins® diesel
engine.
In addition, commercially available fuel addi -
tives are not necessary for the proper operation
of your Cummins® diesel engine.
INTERVENTION REGENERATION
S
TRATEGY — MESSAGE PROCESS FLOW
The Cummins® diesel engine meets all
Environmental Protection Agency (EPA) Heavy Duty
Diesel Engine Emissions Standards, resulting in
one of the lowest emitting diesel engines ever
produced.
To achieve these emissions standards, your
vehicle is equipped with a state-of-the-art engine
and exhaust system. The engine and exhaust
after-treatment system work together to achieve
WARNING!
Do not open the high pressure fuel system with
the engine running. Engine operation causes
high fuel pressure. High pressure fuel spray can
cause serious injury or death.
CAUTION!
Do not engage the starter motor for more than
15 seconds at a time. Allow two minutes
between the cranking intervals.
WARNING!
Do not use alcohol or gasoline as a fuel blending
agent. They can be unstable under certain
conditions and be hazardous or explosive when
mixed with diesel fuel.
CAUTION!
Due to lack of lubricants in alcohol or gasoline,
the use of these fuels can cause damage to the
fuel system.

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354SERVICING AND MAINTENANCE
(Continued)
(Continued) Under normal operating conditions, the catalytic
converter will not require maintenance. However, it
is important to keep the engine properly tuned to
ensure proper catalyst operation and prevent
possible catalyst damage.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being
assessed against you.
In unusual situations involving grossly
malfunctioning engine operation, a scorching odor
may suggest severe and abnormal catalyst
overheating. If this occurs, stop the vehicle, turn off
the engine and allow it to cool. Service, including a
tune-up to manufacturer's specifications, should
be obtained immediately. To minimize the possibility of catalytic converter
damage:
Do not interrupt the ignition when the transmis
-
sion is in gear and the vehicle is in motion.
Do not try to start the vehicle by pushing or
towing the vehicle.
Do not idle the engine with any ignition compo -
nents disconnected or removed, such as when
diagnostic testing, or for prolonged periods
during very rough idle or malfunctioning oper -
ating conditions.
COOLING SYSTEM
WARNING!
Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you uncon -
scious and can eventually poison you
Ú page 309.
A hot exhaust system can start a fire if you
park over materials that can burn. Such mate -
rials might be grass or leaves coming into
contact with your exhaust system. Do not park
or operate your vehicle in areas where your
exhaust system can contact anything that can
burn.
CAUTION!
The catalytic converter requires the use of
unleaded fuel only. Leaded gasoline will
destroy the effectiveness of the catalyst as an
emissions control device and may seriously
reduce engine performance and cause
serious damage to the engine.
Damage to the catalytic converter can result if
your vehicle is not kept in proper operating
condition. In the event of engine malfunction,
particularly involving engine misfire or other
apparent loss of performance, have your
vehicle serviced promptly. Continued opera -
tion of your vehicle with a severe malfunction
could cause the converter to overheat,
resulting in possible damage to the converter
and vehicle.
CAUTION!
WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from your
radiator. If you see or hear steam coming from
under the hood, do not open the hood until the
radiator has had time to cool. Never open a
cooling system pressure cap when the radi -
ator or coolant bottle is hot.
Keep hands, tools, clothing, and jewelry away
from the radiator cooling fan when the hood is
raised. The fan starts automatically and may
start at any time, whether the engine is
running or not.

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364SERVICING AND MAINTENANCE
FUSES
General Information
The fuses protect electrical systems against
excessive current.
When a device does not work, you must check the
fuse element inside the blade fuse for a break/
melt.
Also, please be aware that using power outlets for
extended periods of time with the engine off may
result in vehicle battery discharge.

Blade Fuses
Power Distribution Center
The Power Distribution Center is located in the
engine compartment near the battery. This center
contains cartridge fuses, micro fuses, relays, and
circuit breakers. A description of each fuse and
component may be stamped on the inside cover,
otherwise the cavity number of each fuse is
stamped on the inside cover that corresponds to
the following chart.
WARNING!
When replacing a blown fuse, always use an
appropriate replacement fuse with the same
amp rating as the original fuse. Never replace
a fuse with another fuse of higher amp rating.
The use of a fuse with a rating other than indi -
cated may result in a dangerous electrical
system overload. If a properly rated fuse
continues to blow, it indicates a problem in the
circuit that must be corrected. Never replace a
blown fuse with metal wires or any other mate -
rial. Do not place a fuse inside a circuit
breaker cavity or vice versa. Failure to use
proper fuses may result in serious personal
injury, fire and/or property damage.
Before replacing a fuse, make sure that the
ignition is off and that all the other services
are switched off and/or disengaged.
If the replaced fuse blows again, contact an
authorized dealer.
If a general protection fuse for safety systems
(air bag system, braking system), power unit
systems (engine system, transmission
system) or steering system blows, contact an
authorized dealer.
1 — Fuse Element
2 — Blade Fuse with a good/functional fuse
element
3 — Blade fuse with a bad/not functional fuse
element (blown fuse)
CAUTION!
When installing the power distribution center
cover, it is important to ensure the cover is
properly positioned and fully latched. Failure to
do so may allow water to get into the power
distribution center and possibly result in an
electrical system failure.
CAUTION!
If it is necessary to wash the engine
compartment, take care not to directly hit the
fuse box or the windshield wiper motors with
water.

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SERVICING AND MAINTENANCE369
F63 –20 Amp Yellow Ignition Coils / CAPS
F64 –25 Amp Clear Fuel Injectors
F65 ––Spare
F66 –10 Amp RedSunroof / USB Rear * / Inside Rearview Mirror / Passenger
Window SW
F67 –10 Amp Red
UCI Port / USB Front / Trailer Gateway Module (360 Camera) /
Tachograph

F68 –10 Amp Red AEB RACAM HTR *
F69 –15 Amp Blue SCR Mod 12 Volt *
F70 –30 Amp Green Fuel Pump Mtr/ Fuel Htr RLY
F71 –25 Amp Clear Amp / Act Noise Cnsl
F72 ––Spare
F73 –20 Amp Yellow Fuel Transfer Pump *
F74 –10 Amp Red Backup Alarm
F75 –10 Amp Red SCR RLY / ATMM*
F76 –10 Amp Red Electronic Stability Control (ESC) *
F77 –10 Amp Red DTCM / TCM / FAD MOD / STOM
F78 –15 Amp Blue ECM / PCM / IRCM / AUX PDC Relay Coil Feed / HRLS
F79 –15 Amp Blue ID / Clearance Lt
F80 –10 Amp Red Ovrdh Con / Assist / 911
F81 –20 Amp Yellow Trlr tow Rt turn/Stop
Cavity Cartridge Fuse Micro Fuse Description
* If Equipped
8

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392SERVICING AND MAINTENANCE
Dual Rear Wheels

Tire Rotation

The tires used on dual wheel assemblies should be
matched for wear to prevent overloading one tire in
a set. To check if tires are even, lay a straight edge
across all four tires. The straight edge should touch
all the tires.
NOTE:If your vehicle is equipped with a Tire Pressure
Information System (TPIS):
The Tire Pressure Information System (TPIS)
uses unique sensors in the inner rear wheels to
help identify them from the outer rear wheels,
because of this, the inner and outer wheel loca -
tions can’t be switched.
After a tire rotation is completed, as shown
below, the system can auto learn the locations
of each sensor ID. Auto learning/localization occurs when the vehicle ignition status is
changed from Off to On and speeds of greater
than 5 mph (8 km/h) are obtained and remain
over 5 mph (8 km/h) for at about a 15 minute
period. You may need to drive for 20 minutes to
account slower speeds and stops.
If the tires are rotated incorrectly, the Auto local
-
ization of the TPIS sensors will fail to locate
correctly resulting in incorrect locations for the
pressure values displayed in the Instrument
Cluster.
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES
The following tire grading categories
were established by the National
Highway Traffic Safety Administration.
The specific grade rating assigned by the
tire's manufacturer in each category is
shown on the sidewall of the tires on
your vehicle.
All passenger vehicle tires must conform
to Federal safety requirements in
addition to these grades.
TREADWEAR
The Treadwear grade is a comparative
rating, based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course.
For example, a tire graded 150 would
wear one and one-half times as well on
the government course as a tire graded
100. The relative performance of tires
depends upon the actual conditions of
their use, however, and may depart
significantly from the norm due to
CAUTION!
4500/5500 Dual Rear Tires may only have
one approved direction of rotation. This is to
accommodate the asymmetrical design (tread
pattern) of the On/Off road tire.
When replacing a flat, the spare tire may have
to be remounted on the rim or installed at a
different location to maintain the correct
placement of the tire on the wheel relative to
the tire/wheel position on the vehicle. For
example, if the spare is used to replace an
outer rear tire it will have to be remounted on
the rim so that the wheel is dished inward.
That way the tread design of asymmetrical
tires will maintain proper position.

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