2015 Ram 5500 Chassis Cab run flat

System Reset Procedure
In order to reset the Enhanced Accident Response System
functions after an event, the ignition switch must be
changed from ignition START or ON/RUN to ignition
OFF.
Air Bag Warning Light
The air bags must be ready to inflate for your
protection in a collision. The Occupant Re-
straint Controller (ORC) monitors the internal
circuits and interconnecting wiring associated
with air bag system electrical components.
The ORC monitors the readiness of the electronic parts of
the air bag system whenever the ignition is in the START
or ON/RUN position. If the ignition is in the OFF
position or in the ACC position, the air bag system is not
on and the air bags will not inflate. The ORC contains a backup power supply system that
may deploy the air bags even if the battery loses power or
it becomes disconnected prior to deployment.
The ORC turns on the Air Bag Warning Light in the
instrument panel for approximately four to eight seconds
for a self-check when the ignition is first placed in the
ON/RUN position. After the self-check, the Air Bag
Warning Light will turn off. If the ORC detects a mal-
function in any part of the system, it turns on the Air Bag
Warning Light, either momentarily or continuously. A
single chime will sound to alert you if the light comes on
again after initial startup.
The ORC also includes diagnostics that will illuminate
the instrument panel Air Bag Warning Light if a malfunc-
tion is detected that could affect the air bag system. The
diagnostics also record the nature of the malfunction.
While the air bag system is designed to be maintenance
2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 71

free, if any of the following occurs, have an authorized
dealer service the air bag system immediately.
•The Air Bag Warning Light does not come on during
the four to eight seconds when the ignition is first
placed in the ON/RUN position.
• The Air Bag Warning Light remains on after the four to
eight-second interval.
• The Air Bag Warning Light comes on intermittently or
remains on while driving.
NOTE: If the speedometer, tachometer, or any engine
related gauges are not working, the Occupant Restraint
Controller (ORC) may also be disabled. In this condition
the air bags may not be ready to inflate for your protec-
tion. Have an authorized dealer service the air bag
system immediately.WARNING!
Ignoring the Air Bag Warning Light in your instru-
ment panel could mean you won’t have the air bags
to protect you in a collision. If the light does not come
on as a bulb check when the ignition is first placed in
the on position, and stays on after you start the
vehicle, or if it comes on as you drive, have an
authorized dealer service the air bag system immedi-
ately.
72 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Maintaining Your Air Bag System
WARNING!
•Modifications to any part of the air bag system
could cause it to fail when you need it. You could
be injured if the air bag system is not there to
protect you. Do not modify the components or
wiring, including adding any kind of badges or
stickers to the steering wheel hub trim cover or the
upper right side of the instrument panel. Do not
modify the front bumper, vehicle body structure, or
add aftermarket side steps or running boards.
• It is dangerous to try to repair any part of the air
bag system yourself. Be sure to tell anyone who
works on your vehicle that it has an air bag system.
(Continued)
WARNING! (Continued)
•Do not attempt to modify any part of your air bag
system. The air bag may inflate accidentally or may
not function properly if modifications are made.
Take your vehicle to an authorized dealer for any
air bag system service. If your seat, including your
trim cover and cushion, needs to be serviced in any
way (including removal or loosening/tightening of
seat attachment bolts), take the vehicle to your
authorized dealer. Only manufacturer approved
seat accessories may be used. If it is necessary to
modify the air bag system for persons with dis-
abilities, contact your authorized dealer.2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 73

•Cruise Off
• Cruise Ready
• Cruise Set To XXX MPH
• Tire Pressure Screen With Low Tire(s) “Inflate Tire to
XX”
• Tire Pressure Information System (TPIS)
• Service Tire Pressure System
• Parking Brake Engaged
• Brake Fluid Low
• Service Electronic Braking System
• Engine Temperature Hot
• Battery Voltage Low
• Service Electronic Throttle Control •
Lights On
• Right Turn Signal Light Out
• Left Turn Signal Light Out
• Turn Signal On
• Sound Horn with Remote Lock: Off; 1st Press; 2nd
Press
• Vehicle Not in Park
• Key in Ignition
• Key in Ignition Lights On
• Remote Start Active Key to Run
• Remote Start Active Push Start Button
• Remote Start Aborted Fuel Low
• Remote Start Aborted Too Cold
220 UNDERSTANDING YOUR INSTRUMENT PANEL

•Tire Pressure Screen With Low Tire(s) “Inflate Tire to
XX”
• Tire Pressure Information System (TPIS)
• Service Tire Pressure System
• Parking Brake Engaged
• Brake Fluid Low
• Service Electronic Braking System
• Engine Temperature Hot
• Battery Voltage Low
• Service Electronic Throttle Control
• Lights On
• Right Turn Signal Light Out
• Left Turn Signal Light Out •
Turn Signal On
• Sound Horn with Remote Lock: Off; 1st Press; 2nd
Press
• Vehicle Not in Park
• Key in Ignition
• Key in Ignition Lights On
• Remote Start Active Key to Run
• Remote Start Active Push Start Button
• Remote Start Aborted Fuel Low
• Remote Start Aborted Too Cold
• Remote Start Aborted Door Open
• Remote Start Aborted Hood Open
• Remote Start Aborted Trunk Open
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UNDERSTANDING YOUR INSTRUMENT PANEL 229

▫Tire Markings ....................... .382
▫ Tire Identification Number (TIN) ...........386
▫ Tire Terminology And Definitions ..........387
▫ Tire Loading And Tire Pressure ...........389
 TIRES — GENERAL INFORMATION ........394
▫ Tire Pressure ....................... .394
▫ Tire Inflation Pressures .................395
▫ Tire Pressures For High Speed Operation . . . .397
▫ Tire Maintenance and Replacement .........397
▫ Radial Ply Tires ..................... .398
▫ Tire Types .......................... .398
▫ Run Flat Tires — If Equipped .............400
▫ Spare Tires — If Equipped ...............400 ▫
Tire Spinning ....................... .403
▫ Tread Wear Indicators ..................403
▫ Life Of Tire ........................ .404
▫ Replacement Tires .....................405

SUPPLEMENTAL TIRE PRESSURE INFORMATION —
IF EQUIPPED ......................... .406
TIRE CHAINS (TRACTION DEVICES) .......407
 TIRE ROTATION RECOMMENDATIONS .....409
▫ Dual Rear Wheels .....................410
 TIRE PRESSURE MONITOR SYSTEM (TPMS) . .411
▫ Base System — If Equipped ..............414
▫ Premium System ..................... .414
▫ Tire Pressure Information System (TPIS)
Chassis Cab — If Equipped ..............419
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STARTING AND OPERATING 327

Traction
When driving on wet or slushy roads, it is possible for a
wedge of water to build up between the tire and road
surface. This is known as hydroplaning and may cause
partial or complete loss of vehicle control and stopping
ability. To reduce this possibility, the following precau-
tions should be observed:
•Slow down during rainstorms or when the roads are
slushy.
• Slow down if the road has standing water or puddles.
• Replace tires when tread wear indicators first become
visible.
• Keep tires properly inflated.
• Maintain sufficient distance between your vehicle and
the vehicle in front of you to avoid a collision in a
sudden stop. Your vehicle may be equipped with a Limited Slip
Differential (LSD) that reduces, but does not eliminate,
the amount of wheel slip across a given axle for im-
proved handling.
DRIVING THROUGH WATER
Driving through water more than a few inches/
centimeters deep will require extra caution to ensure
safety and prevent damage to your vehicle.
Flowing/Rising Water
WARNING!
Do not drive on or across a road or path where water
is flowing and/or rising (as in storm run-off). Flow-
ing water can wear away the road or path’s surface
and cause your vehicle to sink into deeper water.
Furthermore, flowing and/or rising water can carry
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STARTING AND OPERATING 363

Radial Ply Tires
WARNING!
Combining radial ply tires with other types of tires
on your vehicle will cause your vehicle to handle
poorly. The instability could cause a collision. Al-
ways use radial ply tires in sets of four. Never
combine them with other types of tires.
Tire Repair
If your tire becomes damaged, it may be repaired if it
meets the following criteria:
• The tire has not been driven on when flat.
• The damage is only on the tread section of your tire
(sidewall damage is not repairable).
• The puncture is no greater thana¼ofaninch (6 mm). Consult an authorized tire dealer for tire repairs and
additional information.
Damaged Run Flat tires, or Run Flat tires that have
experienced a loss of pressure should be replaced imme-
diately with another Run Flat tire of identical size and
service description (Load Index and Speed Symbol).
Tire Types
All Season Tires — If Equipped
All Season tires provide traction for all seasons (spring,
summer, fall and winter). Traction levels may vary be-
tween different all season tires. All season tires can be
identified by the M+S, M&S, M/S or MS designation on
the tire sidewall. Use all season tires only in sets of four;
failure to do so may adversely affect the safety and
handling of your vehicle.
398 STARTING AND OPERATING