2015 Ram 1500 fuel pressure

▫Tire Identification Number (TIN)...........600
▫Tire Terminology And Definitions..........602
▫Tire Loading And Tire Pressure...........603
!TIRES — GENERAL INFORMATION........608
▫Tire Pressure........................608
▫Tire Inflation Pressures.................610
▫Tire Pressures For High Speed Operation . . . .611
▫Radial Ply Tires......................611
▫Tire Types...........................612
▫Run Flat Tires — If Equipped.............614
▫Spare Tires — If Equipped...............614
▫Tire Spinning........................617
▫Tread Wear Indicators..................617
▫Life Of Tire.........................618
▫Replacement Tires.....................619
!SUPPLEMENTAL TIRE PRESSURE INFORMATION —
IF EQUIPPED..........................620
!TIRE CHAINS (TRACTION DEVICES).......621
!TIRE ROTATION RECOMMENDATIONS.....623
▫Directional Tires — If Equipped...........624
▫Dual Rear Wheels — If Equipped..........624
!TIRE PRESSURE MONITOR SYSTEM (TPMS) . .626
▫Premium System......................629
▫Tire Pressure Information System (TPIS)
3500 Series Trucks.....................632
▫General Information...................634
!FUEL REQUIREMENTS..................634
5
STARTING AND OPERATING 445

OFF-ROAD DRIVING TIPS
Care should be taken when attempting to climb steep
hills or driving diagonally across a hill or slope. If natural
obstacles force you to travel diagonally up or down a hill,
choose a mild angle and keep as little side tilt as possible.
Keep the vehicle moving and make turns slowly and
cautiously.
If you must back down a hill, back straight down using
REVERSE gear. Never back down in NEUTRAL or diago-
nally across the hill.
When driving over sand, mud, and other soft terrain,
shift to low gear and drive steadily. Apply the accelerator
slowly to avoid spinning the wheels.
Do not reduce the tire pressures for this type of driving.
After Driving Off-Road
Off-road operation puts more stress on your vehicle than
does most on-road driving. After going off-road, it is
always a good idea to check for damage. That way you
can get any problems taken care of right away and have
your vehicle ready when you need it.
•Completely inspect the underbody of your vehicle.
Check tires, body structure, steering, suspension, and
exhaust system for damage.
•Inspect the radiator for mud and debris and clean as
required.
•Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten them, if required, and torque to the
values specified in the Service Manual.
•Check for accumulations of plants or brush. These
things could be a fire hazard. They might hide damage
to fuel lines, brake hoses, axle pinion seals, and
propeller shafts.
5
STARTING AND OPERATING 555

WARNING!(Continued)
•Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the
right or left.
•Always drive with each tire inflated to the recom-
mended cold tire inflation pressure.
Both under-inflation and over-inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
NOTE:
•Unequal tire pressures from side to side may cause
erratic and unpredictable steering response.
•Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Economy
Underinflated tires will increase tire rolling resistance
resulting in higher fuel consumption.
Tread Wear
Improper cold tire inflation pressures can cause abnor-
mal wear patterns and reduced tread life, resulting in the
need for earlier tire replacement.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Over-inflation produces a jarring and uncomfortable
ride.
5
STARTING AND OPERATING 609

CAUTION!
•The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system op-
eration or sensor damage may result when using
replacement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Using aftermarket tire sealants may
cause the Tire Pressure Monitoring System (TPMS)
sensor to become inoperable. After using an after-
market tire sealant it is recommended that you take
your vehicle to your local dealer to have your
sensor function checked.
•After inspecting or adjusting the tire pressure,
always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the valve
stem, which could damage the TPM sensor.
NOTE:
•The TPMS is not intended to replace normal tire care
and maintenance or to provide warning of a tire failure
or condition.
•The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
•Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
•The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver ’s responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if under-inflation has not reached the level
to trigger illumination of the “Tire Pressure Monitor-
ing Telltale Light.”
628 STARTING AND OPERATING

Tire Size
The tire size on the Vehicle Certification Label represents
the actual tire size on your vehicle. Replacement tires
must be equal to the load capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo
loaded into the vehicle. The front and rear curb weight
values are determined by weighing your vehicle on a
commercial scale before any occupants or cargo are
added.
Loading
The actual total weight and the weight of the front and
rear of your vehicle at the ground can best be determined
by weighing it when it is loaded and ready for operation.
The entire vehicle should first be weighed on a commer-
cial scale to insure that the GVWR has not been exceeded.
The weight on the front and rear of the vehicle should
then be determined separately to be sure that the load is
properly distributed over the front and rear axle. Weigh-
ing the vehicle may show that the GAWR of either the
front or rear axles has been exceeded but the total load is
within the specified GVWR. If so, weight must be shifted
from front to rear or rear to front as appropriate until the
specified weight limitations are met. Store the heavier
5
STARTING AND OPERATING 647

CAUTION!(Continued)
•Your vehicle has been built with improved fluids
that protect the performance and durability of your
vehicle and also allow extended maintenance inter-
vals. Do not use chemical flushes in these compo-
nents as the chemicals can damage your engine,
transmission, power steering or air conditioning.
Such damage is not covered by the New Vehicle
Limited Warranty. If a flush is needed because of
component malfunction, use only the specified
fluid for the flushing procedure.
Engine Oil
Checking Oil Level
To assure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. Check
the oil level at regular intervals, such as every fuel stop.
The best time to check the engine oil level is about five
minutes after a fully warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the
dipstick. Adding one quart of oil when the reading is at
the bottom of the SAFE zone will result in a reading at the
top of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.7
MAINTAINING YOUR VEHICLE 755

Cavity Cartridge Fuse Micro FuseDescription
F3430 Amp PinkVehicle System Interface Module #2 – If
Equipped
F3530 Amp PinkSunroof – If Equipped
F3630 Amp PinkRear Defroster– If Equipped
F3730 Amp PinkCummins Diesel Fuel Heater #2 If Equipped
F3830 Amp PinkPower Inverter 115V AC– If Equipped
F3930 Amp PinkVehicle System Interface Module #1– If
Equipped
F4110 Amp RedActive Grill Shutter
F4220 Amp YellowHorn
F4410 Amp RedDiagnostic Port
F4610 Amp RedTire Pressure Monitor
F4910 Amp RedInstrument Panel Cluster
F5020 Amp Yellow Air Suspension Control Module – If Equipped
F5110 Amp Red Ignition Node Module / Keyless Ignition
802 MAINTAINING YOUR VEHICLE

Adding Engine Coolant (Antifreeze)............776
Adding Fuel.............................643
Additives, Fuel...........................637
Adjustable Pedals.........................185
Air bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Air Bag
Advance Front Air Bag....................68
Air bag Operation.......................70
Air Bag Warning Light....................79
Enhanced Accident Response................78
Event Data Recorder (EDR).................82
Front Air Bag . . . . . . . . . . . . . . . . . . . . . . . . . . .67
If A Deployment Occurs...................77
Knee Impact Bolsters.....................71
Maintaining Your Air Bag System............81
Side Air Bags...........................72
Air bag Deployment........................67
Air bag Light.............................79
Air bag Maintenance........................81
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . .759
Air Conditioner Maintenance.................765
Air Conditioning..........................400
Air Conditioning Controls...................400
Air Conditioning, Operating Tips..............419
Air Conditioning Refrigerant.................765
Air Conditioning System....................400
Air Pressure, Tires.........................610
Air Suspension...........................516
Alarm Light.............................294
Alarm, Panic.............................28
Alarm (Security Alarm)......................21
Alarm System (Security Alarm)................21
Alterations/Modifications, Vehicle...............7
Antifreeze (Engine Coolant)..................776
Disposal..............................778
Anti-Lock Brake System (ABS)................581
Anti-Lock Warning Light....................289
Appearance Care.........................790
848 INDEX