tire pressure RAM CHASSIS CAB 2016 User Guide

Vehicle Info
Push and release the UP or DOWN ar-
row button until the Vehicle Info icon is
highlighted in the DID. Push and release the
RIGHT arrow button to enter the sub-
menus items of Vehicle Info. follow the directional
prompts to access or reset any of the following Vehicle
Info submenu items:
• Tire Pressure:
– Tire Pressure Information System (3500 Series
Heavy Duty Ram Trucks)
– A vehicle ICON is displayed with the tire pressure
values in each corner of the ICON.
– If the Tire Pressure system requires service, “Service
Tire Pressure System” is displayed.
– Tire Pressure is an information only function and
cannot be reset. – Refer to the  Tire Pressure Information System
(TPIS)” under  Starting and Operating  for further
information.
• Transmission Temperature – Automatic Transmission
Only
• Oil Temperature
• Oil Life
• Battery Voltage — If Equipped
• Gauge Summary:
– Coolant Temperature
– Transmission Temperature (automatic only)
– Oil Temperature
– Oil Pressure
• Engine Hours 4UNDERSTANDING YOUR INSTRUMENT PANEL 297

▫ Trailer Sway Control (TSC) ............. .455
▫ Hill Descent Control (HDC) — If Equipped . . .456
 TIRE SAFETY INFORMATION ............ .459
▫ Tire Markings ....................... .459
▫ Tire Identification Number (TIN) .......... .463
▫ Tire Terminology And Definitions ......... .465
▫ Tire Loading And Tire Pressure .......... .466
 TIRES — GENERAL INFORMATION ....... .471
▫ Tire Pressure ....................... .471
▫ Tire Inflation Pressures ................ .472
▫ Tire Pressures For High Speed Operation . . . .474
▫ Tire Maintenance And Replacement ........ .474
▫ Radial Ply Tires ..................... .475 ▫ Tire Types .......................... .475
▫ Run Flat Tires — If Equipped ............ .477
▫ Spare Tires — If Equipped .............. .477
▫ Tire Spinning ....................... .480
▫ Tread Wear Indicators ................. .480
▫ Life Of Tire ........................ .481
▫ Replacement Tires .................... .482
 SUPPLEMENTAL TIRE PRESSURE INFORMATION
— IF EQUIPPED ...................... .484
 TIRE CHAINS (TRACTION DEVICES) ...... .484
 TIRE ROTATION RECOMMENDATIONS .... .486
▫ Dual Rear Wheels .................... .487
 TIRE PRESSURE MONITOR SYSTEM (TPMS) . .488 5STARTING AND OPERATING 399

▫ Base System — If Equipped ............. .491
▫ Premium System ..................... .491
▫ Tire Pressure Information System (TPIS) Chassis
Cab — If Equipped ................... .496
▫ General Information ................... .498
 FUEL REQUIREMENTS ................. .498
▫ 6.4L Engine ......................... .498
▫ Reformulated Gasoline ................ .499
▫ Gasoline/Oxygenate Blends ............. .499
▫ E-85 Usage In Non-Flex Fuel Vehicles ...... .500
▫ MMT In Gasoline .................... .500
▫ Materials Added To Fuel ............... .500
▫ Fuel System Cautions .................. .501 ▫ Carbon Monoxide Warnings ............ .502
 ADDING FUEL ....................... .503
▫ Loose Fuel Filler Cap Message ........... .504
 VEHICLE LOADING ................... .504
▫ Certification Label ................... .504
 TRAILER TOWING .................... .507
▫ Common Towing Definitions ............ .507
▫ Trailer Hitch Classification .............. .512
▫ Trailer Towing Weights (Maximum Trailer Weight
Ratings) ........................... .513
▫ Trailer And Tongue Weight ............. .513
▫ Towing Requirements ................. .514
▫ Towing Tips ........................ .522400 STARTING AND OPERATING

The 4H and 4L positions are intended for loose, slippery
road surfaces only. Driving in the 4H and 4L positions on
dry, hard surfaced roads may cause increased tire wear
and damage to the driveline components.
The “Transfer Case Position Indicator Light” in the
instrument cluster will alert the driver that the vehicle is
in four-wheel drive and that the front and rear drive-
shafts are locked together. This light will illuminate when
the transfer case is shifted into either the 4H or 4L
position. There is no light for the 2H or NEUTRAL
positions on some models.
When operating your vehicle in 4L, the engine speed is
approximately three times that of the 2H or 4H positions
at a given road speed. Take care not to overspeed the
engine and do not exceed 25 mph (40 km/h). Proper operation of four-wheel drive vehicles depends
on tires of equal size, type and circumference on each
wheel. Any difference will adversely affect shifting and
can cause damage to the drivetrain.
NOTE: Do not attempt to make a shift while only the
front or rear wheels are spinning. The front and rear
driveshaft speeds must be equal for the shift to take
place. Shifting while only the front or rear wheels are
spinning can cause damage to the transfer case.
Because four-wheel drive provides improved traction,
there is a tendency to exceed safe turning and stopping
speeds. Do not go faster than road conditions permit.
NOTE: Delayed shifts out of four-wheel drive may be
experienced due to uneven tire wear, low or uneven tire
pressures, excessive vehicle loading, or cold tempera-
tures.424 STARTING AND OPERATING

WARNING! (Continued)braking or steering efficiency beyond that afforded
by the condition of the vehicle brakes and tires or
the traction afforded.
• The ABS cannot prevent collisions, including those
resulting from excessive speed in turns, following
another vehicle too closely, or hydroplaning.
• The capabilities of an ABS equipped vehicle must
never be exploited in a reckless or dangerous
manner that could jeopardize the user ’s safety or
the safety of others.
ABS is designed to function with the OEM tires. Modifi-
cation may result in degraded ABS performance.
Anti-Lock Brake Warning Light
The amber “Anti-Lock Brake Warning Light” will turn on
when the ignition switch is turned to the ON position
and may stay on for as long as four seconds. If the “Anti-Lock Brake Warning Light” remains on or
comes on while driving, it indicates that the anti-lock
portion of the brake system is not functioning and that
service is required. However, the conventional brake
system will continue to operate normally if the “Brake
System Warning Light” is not on.
If the “Anti-Lock Brake Warning Light” is on, the brake
system should be serviced as soon as possible to restore
the benefits of anti-lock brakes. If the “Anti-Lock Brake
Warning Light” does not come on when the ignition
switch is turned to the ON position, have the light
repaired as soon as possible.
Brake Assist System (BAS)
The BAS is designed to optimize the vehicle’s braking
capability during emergency braking maneuvers. The
system detects an emergency braking situation by sens-
ing the rate and amount of brake application and then
applies optimum pressure to the brakes. This can help 5STARTING AND OPERATING 445

• The cluster icon and switch lamp will flash for several
seconds then extinguish when the driver pushes the
HDC switch but enable conditions are not met.
• The cluster icon and switch lamp will flash for several
seconds then extinguish when HDC disables due to
excess speed.
• The cluster icon and switch lamp will flash when HDC
deactivates due to overheated brakes. The flashing will
stop and HDC will activate again once the brakes have
cooled sufficiently.
WARNING!HDC is only intended to assist the driver in control-
ling vehicle speed when descending hills. The driver
must remain attentive to the driving conditions and
is responsible for maintaining a safe vehicle speed. TIRE SAFETY INFORMATION
Tire Markings
1 — U.S. DOT Safety Standards
Code (TIN) 4 — Maximum Load
2 — Size Designation 5 — Maximum Pressure
3 — Service Description 6 — Treadwear, Traction and
Temperature Grades 5STARTING AND OPERATING 459

NOTE:
• P (Passenger) — Metric tire sizing is based on U.S.
design standards. P-Metric tires have the letter “P”
molded into the sidewall preceding the size designa-
tion. Example: P215/65R15 95H.
• European — Metric tire sizing is based on European
design standards. Tires designed to this standard have
the tire size molded into the sidewall beginning with
the section width. The letter  P  is absent from this tire
size designation. Example: 215/65R15 96H.
• LT (Light Truck) — Metric tire sizing is based on U.S.
design standards. The size designation for LT-Metric
tires is the same as for P-Metric tires except for the
letters “LT” that are molded into the sidewall preced-
ing the size designation. Example: LT235/85R16. • Temporary spare tires are designed for temporary
emergency use only. Temporary high pressure com-
pact spare tires have the letter “T” or “S” molded into
the sidewall preceding the size designation. Example:
T145/80D18 103M.
• High flotation tire sizing is based on U.S. design
standards and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.460 STARTING AND OPERATING

EXAMPLE:
R = Construction code
–  R  means radial construction, or
–  D  means diagonal or bias construction
15, 16, 18 = Rim diameter in inches (in)
Service Description:
95 = Load Index
– A numerical code associated with the maximum load a tire can carry
H = Speed Symbol
– A symbol indicating the range of speeds at which a tire can carry a load corresponding to
its load index under certain operating conditions
– The maximum speed corresponding to the speed symbol should only be achieved under
specified operating conditions (i.e., tire pressure, vehicle loading, road conditions, and
posted speed limits)462 STARTING AND OPERATING

EXAMPLE:
Load Identification:
Absence of the following load identification symbols on the sidewall of the tire indicates a Standard Load (SL)
tire:
• XL = Extra load (or reinforced) tire, or
• LL = Light load tire or
• C, D, E, F, G = Load range associated with the maximum load a tire can carry at a specified pressure
Maximum Load – Maximum load indicates the maximum load this tire is designed to carry
Maximum Pressure – Maximum pressure indicates the maximum permissible cold tire inflation pressure for this
tire
Tire Identification Number (TIN)
The TIN may be found on one or both sides of the tire,
however, the date code may only be on one side. Tires
with white sidewalls will have the full TIN, including the
date code, located on the white sidewall side of the tire. Look for the TIN on the outboard side of black sidewall
tires as mounted on the vehicle. If the TIN is not found on
the outboard side, then you will find it on the inboard
side of the tire. 5STARTING AND OPERATING 463

Tire Terminology And Definitions
Term Definition
B-Pillar The vehicle B-Pillar is the structural member of the body located
behind the front door.
Cold Tire Inflation Pressure Cold tire inflation pressure is defined as the tire pressure after
the vehicle has not been driven for at least three hours, or driven
less than 1 mile (1.6 km) after sitting for a minimum of three
hours. Inflation pressure is measured in units of PSI (pounds per
square inch) or kPa (kilopascals).
Maximum Inflation Pressure The maximum inflation pressure is the maximum permissible
cold tire inflation pressure for this tire. The maximum inflation
pressure is molded into the sidewall.
Recommended Cold Tire Inflation
Pressure Vehicle manufacturer’s recommended cold tire inflation pressure
as shown on the tire placard.
Tire Placard A label permanently attached to the vehicle describing the vehi-
cle’s loading capacity, the original equipment tire sizes and the
recommended cold tire inflation pressures. 5STARTING AND OPERATING 465