wheel size DODGE CHALLENGER SRT 2009 3.G Owners Manual

WARNING!
Ignoring the AIRBAG Warning Light in your instru-
ment panel could mean you won’t have the airbags to
protect you in a collision. If the light does not come
on, stays on after you start the vehicle, or if it comes
on as you drive, have the airbag system checked right
away.
•TheDriver and Front Passenger Airbag/Inflator
Unitsare located in the center of the steering wheel
and the passenger side of the instrument panel. When
the ORC detects a collision requiring the airbags, it
signals the inflator units. A large quantity of nontoxic
gas is generated to inflate the front airbags. Different
airbag inflation rates may be possible based on colli-
sion severity. The steering wheel hub trim cover, andthe upper passenger side of the instrument panel
separate and fold out of the way as the bags inflate to
their full size. The bags fully inflate in about 50 to 70
milliseconds. This is about half of the time that it takes
to blink your eyes. The bags then quickly deflate while
helping to restrain the driver and front passenger. The
driver front airbag gas is vented through vent holes in
the sides of the airbag. The passenger front airbag gas
is vented through vent holes in the sides of the airbag.
In this way, the airbags do not interfere with your
control of the vehicle.
•TheKnee Impact Bolstershelp protect the knees of
the driver and the front passenger and position every-
one for the best interaction with the front airbag.
52 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

To Activate
Push and release the ON/OFF button located
on the end of the speed control lever. The
indicator light in the instrument cluster will
illuminate to show that the speed control sys-
tem is on. To turn the system off, push and release the
ON/OFF button again. The system and the indicator
light will turn off.
WARNING!
Leaving the electronic speed control system on when
not in use is dangerous. You could accidentally set
the system or cause it to go faster than you want. You
could lose control and have an accident. Always
leave the system OFF when you aren’t using it.
To Set At A Desired Speed
When the vehicle reaches the speed desired, push the
lever downward to SET DECEL and release. Remove
your foot from the accelerator pedal and the vehicle will
operate at the selected speed.
NOTE:
•Speed control will only function in 3rd, 4th, or 5th gear
when in the Autostickmode (if equipped).
•The speed control may not engage if a different size
tire is installed on one wheel, such as the compact
spare tire.
To Deactivate
The system will disable electronic speed control without
erasing the memory if you:
•Softly tap the brake pedal,
•Depress the brake pedal, or
•Pull the speed control lever toward you to CANCEL.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 127
3

maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the TPMS
low tire pressure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system is not
operating properly. The TPMS malfunction indicator is
combined with the low tire pressure telltale. When the
system detects a malfunction, the telltale will flash for
approximately one minute and then remain continuously
illuminated. This sequence will continue upon subse-
quent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire pressure
as intended. TPMS malfunctions may occur for a variety
of reasons, including the installation of replacement or
alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the
TPMS malfunction telltale after replacing one or moretires or wheels on your vehicle to ensure that the replace-
ment or alternate tires and wheels allow the TPMS to
continue to function properly.
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 opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use aftermarket tire sealants
or balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
UNDERSTANDING YOUR INSTRUMENT PANEL 157
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WARNING!
•The Anti-Lock Brake System (ABS) contains sophisticated elec-
tronic equipment that may be susceptible to interference caused by
improperly installed or high output radio transmitting equipment.
This interference can cause possible loss of anti-lock braking
capability. Installation of such equipment should be performed by
qualified professionals.
•Pumping of the Anti-Lock Brakes will diminish their effectiveness
and may lead to an accident. Pumping makes the stopping distance
longer. Just press firmly on your brake pedal when you need to
slow down or stop.
•The Anti-Lock Brake System (ABS) cannot prevent the natural
laws of physics from acting on the vehicle, nor can it increase
braking or steering efficiency beyond that afforded by the condi-
tion of the vehicle brakes and tires or the traction afforded.
•The Anti-Lock Brake System (ABS) cannot prevent accidents,
including those resulting from excessive speed in turns, following
another vehicle too closely, or hydroplaning. Only a safe, attentive,
and skillful driver can prevent accidents.
•The capabilities of an Anti-Lock Brake System (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.
All vehicle wheels and tires must be the same size and
type and tires must be properly inflated to produce
accurate signals for the computer.
Anti-Lock Brake Light
The Anti-Lock Brake System (ABS) Light monitors
the Anti-Lock Brake System. The light will come
on when the ignition switch is turned to the ON position
and may stay on for as long as four seconds.
If the ABS 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 Warning Light is not on.
If the ABS Light is on, the brake system should be
serviced as soon as possible to restore the benefits of
Anti-Lock brakes. If the ABS Light does not come on
when the ignition switch is turned to the ON position,
have the bulb repaired as soon as possible.
236 STARTING AND OPERATING

Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for
wear and correct cold tire inflation pressure. The manu-
facturer strongly recommends that you use tires equiva-
lent to the originals in size, quality and performance
when replacement is needed. (Refer to the paragraph on
“Tread Wear Indicators”). Refer to the “Tire and Loading
Information” placard for the size designation of your tire.
The service description and load identification will be
found on the original equipment tire. Failure to use
equivalent replacement tires may adversely affect the
safety, handling, and ride of your vehicle. We recommend
that you contact your original equipment or an autho-
rized tire dealer with any questions you may have on tire
specifications or capability.WARNING!
•Do not use a tire, wheel size or rating other than that
specified for your vehicle. Some combinations of un-
approved tires and wheels may change suspension
dimensions and performance characteristics, resulting
in changes to steering, handling, and braking of your
vehicle. This can cause unpredictable handling and
stress to steering and suspension components. You
could lose control and have an accident resulting in
serious injury or death. Use only the tire and wheel
sizes with load ratings approved for your vehicle.
•Never use a tire with a smaller load index or capacity,
other than what was originally equipped on your
vehicle. Using a tire with a smaller load index could
result in tire overloading and failure. You could lose
control and have an accident.
•Failure to equip your vehicle with tires having ad-
equate speed capability can result in sudden tire fail-
ure and loss of vehicle control.
260 STARTING AND OPERATING

CAUTION!
Replacing original tires with tires of a different size
may result in false speedometer and odometer
readings.
Alignment And Balance
Poor suspension alignment may result in:
•Fast tire wear.
•Uneven tire wear, such as feathering and one-sided
wear.
•Vehicle pull to right or left.
Tires may also cause the vehicle to pull to the left or right.
Alignment will not correct this condition. See your
authorized dealer for proper diagnosis.Improper alignment will not cause vehicle vibration.
Vibration may be a result of tire and wheel out-of-
balance. Proper balancing will reduce vibration and
avoid tire cupping and spotty wear.
TIRE CHAINS
Due to limited clearance, tire chains are not recom-
mended.
CAUTION!
Damage to the vehicle may result if tire chains are
used.
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pressures. The vehicle may need to be driven for up to
10 minutes above 15 mph (25 km/h) in order for the
TPMS to receive this information.
For example, your vehicle may have a recom-
mended cold (parked for more than three hours)
placard pressure of 30 psi (207 kPa). If the ambient
temperature is 68°F (20°C) and the measured tire
pressure is 27 psi (186 kPa), a temperature drop to
20°F (-7°C) will decrease the tire pressure to ap-
proximately 26 psi (179 kPa). This tire pressure is
sufficiently low enough to turn ON the TPM Telltale
Light. Driving the vehicle may cause the tire pres-
sure to rise to approximately 27 psi (186 kPa), but
the TPM Telltale Light will still be ON. In this
situation, the TPM Telltale Light will turn OFF only
after the tires are inflated to the vehicle’s recom-
mended cold placard pressure value.
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
operation or sensor damage may result when us-
ing replacement equipment that is not of the same
size, type, and/or style. Aftermarket wheels can
cause sensor damage. Do not use aftermarket tire
sealants or balance beads if your vehicle is
equipped with a TPMS, as damage to the sensors
may result.
•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.
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•CORAX Receiver module,
•Various TPMS messages, which display in the Elec-
tronic Vehicle Information Center (EVIC), and
•TPM Telltale Light
The matching full size spare wheel and tire assembly (if
equipped) has a TPM sensor. The full size spare can be
used in place of any of the four road tires. A spare with a
pressure below the low-pressure limit will not cause the
TPM Telltale Light to illuminate or the chime to sound.
Tire Pressure Monitoring Low Pressure Warnings
The TPM Telltale Light will illuminate in the
instrument cluster and a chime will sound when
tire pressure is low in one or more of the four
active road tires. In addition, the EVIC will display one or
more low pressure messages (Left Front, Left Rear, RightFront, Right Rear) for three seconds and a graphic
showing the pressure values of each tire with the low tire
pressure values flashing.
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