TPMS DODGE RAM 2500 POWER WAGON 2008 3.G Owners Manual

INSTRUMENTS AND CONTROLS
1 Ð Headlight Switch 6 Ð Passenger Airbag* 11 Ð Cup Holders
2 Ð Air Outlets 7 Ð Glove Box 12 Ð Cigar Lighter
3 Ð Instrument Cluster 8 Ð Power Outlet 13 Ð Electronic Axle Locker and Disconnecting Sway Bar Switch
4 Ð Climate Controls 9 Ð Heated Seat Switch 14 Ð Parking Brake Release Lever
5 Ð Radio 10 Ð TPMS ªLight Loadº Reset Switch* 15 Ð Adjustable Pedal Control Switch*
* If EquippedUNDERSTANDING YOUR INSTRUMENT PANEL 177
4

24. Tire Pressure Monitoring Telltale Light Ð If
Equipped
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle
has tires of a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you should
determine the proper tire inflation pressure for those
tires.)
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system (TPMS)
that illuminates a low tire pressure telltale when one or
more of your tires are significantly under-inflated. Ac-
cordingly, when the low tire pressure telltale illuminates,
you should stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving on asignificantly under-inflated tire causes the tire to over-
heat 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.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver 's responsibility to
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.
UNDERSTANDING YOUR INSTRUMENT PANEL 187
4

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 more
tires 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 tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
188 UNDERSTANDING YOUR INSTRUMENT PANEL

TPMS ªLight Loadº Reset Switch ± If Equipped
The TPMS ºLight Loadº reset switch allows you to
choose between Light Load vehicle conditions and Max
Load vehicle conditions tire pressures and related TPMS
warning levels. The switch is located in the instrument
panel, below the climate control panel. For additional
information refer to ªTire Pressure Monitoring System
(TPMS) Ð If Equippedº in section 5 of this manual.
25. Transmission Oil Temperature Warning Light
(Automatic Transmissions Only)
This light indicates that there is excessive trans-
mission fluid temperature that might occur
with severe usage such as trailer towing. It may
also occur when operating the vehicle in a high
torque converter slip condition, such as 4-wheel-drive
operation (e.g. snow plowing, off- road operation). If thislight comes on, stop the vehicle and run the engine at idle
or faster, with the transmission in NEUTRAL until the
light goes off.
26. Odometer/Trip Odometer Button
Press this button to toggle between the odometer and the
trip odometer display. Holding the button in resets the
trip odometer reading when in trip mode.
27. Fuel Gauge
Shows level of fuel in tank when ignition switch is in the
ON position.
28. Low Fuel Warning Light
When the fuel level drops to 1/16 tank, the fuel
symbol will light and a single chime will sound.
NOTE:If your vehicle is equipped with an overhead
console module (CMTC), it is possible for DTE to display
ªLO FUELº before the low fuel warning light turns on in
the instrument cluster. This could occur because the low
UNDERSTANDING YOUR INSTRUMENT PANEL 189
4

mMulti Displacement System (MDS) Ð 5.7L Engine
Only................................326
mTire Safety Information...................326
NTire Markings........................326
NTire Identification Number (TIN)..........330
NTire Loading And Tire Pressure...........331
mTires Ð General Information...............335
NTire Pressure.........................335
NTire Inflation Pressures.................336
NRadial-Ply Tires......................338
NCompact Spare Tire Ð If Equipped.........339
NLimited Use Spare Ð If Equipped.........339
NTire Spinning........................340NTread Wear Indicators..................341
NLife Of Tire.........................341
NReplacement Tires.....................342
NAlignment And Balance.................343
mSupplemental Tire Pressure Information Ð
If Equipped...........................344
mTire Chains...........................344
mSnow Tires...........................345
mTire Rotation Recommendations............346
mTire Pressure Monitor System (TPMS) Ð
If Equipped...........................347
NTire Pressure Monitor System (TPMS) ªLight
Loadº Reset Switch Description ±
If Equipped.........................350
STARTING AND OPERATING 255
5

TIRE PRESSURE MONITOR SYSTEM (TPMS) Ð IF
EQUIPPED
The Tire Pressure Monitoring System (TPMS) will warn
the driver of a low tire pressure based on the vehicle
recommended cold tire inflation placard pressure. The
placard pressure is defined on the Tire and Loading
Information label. The Tire and Loading Information
label is located on the drivers side B-pillar. Vehicles
equipped to be operated in either the ªmax load inflation
pressureº condition described on the Tire and Loading
Information label or the alternative ªlight load inflation
pressureº condition described on the Supplemental Tire
Pressure Information label, may also be equipped with a
reset switch to choose the appropriate TPMS low pres-
sure warning threshold levels based upon the vehicle
load condition. The Supplemental Tire Pressure Informa-
tion label is located on the rear face of the driver door.
Operation of the ªLight Loadº reset switch is described
later in this manual section.The tire pressure will vary with temperature by approxi-
mately 1 psi (6.9 kPa) for every 12ÉF (6.5ÉC). This means
that when the outside temperature decreases, the tire
pressure will decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is defined as
the tire pressure after a vehicle has not been driven for
more than 3 hours, or driven less than 1 mile (1km/h)
after a 3 hour period.Refer to the ªTires ± General
Informationº in this section for information on how to
properly inflate the vehicle's tires.The tire pressure will
also increase as the vehicle is driven - this is normal and
there should be no adjustment for this increased pres-
sure.
The TPM System will warn the driver of a low tire
pressure if the tire pressure falls below the low pressure
warning threshold for any reason, including low tem-
perature effects, or natural pressure loss through the tire.
STARTING AND OPERATING 347
5

The TPM System will continue to warn the driver of low
tire pressure as long as the condition exists, and will not
turn off until the tire pressure is at or above recom-
mended cold placard pressure. Once the low tire pressure
warning has been illuminated, the tire pressure must be
increased to the recommended cold placard pressure in
order for the TPMS warning lamp to be turned off. The
system will automatically update and the TPMS warning
lamp will extinguish once the updated tire pressures
have been received. The vehicle may need to be driven
for up to 10 minutes above 15 mph (25 km/h) to receive
this information.
As an example, assume your vehicle has a recommended
cold tire inflation placard pressure (parked for more than
3 hours) of 35 psi (241 kPa). If the ambient temperature is
68_F (20_C) and the measured tire pressure is 30 psi (207
kPa), a temperature drop to 20_F (-7_C) will decrease the
tire pressure to approximately 26 psi (179 kPa). This tire
pressure is sufficiently low enough to turn ON the TirePressure Monitoring lamp. Driving the vehicle may cause
the tire pressure to rise to approximately 30 psi (207 kPa),
but the Tire Pressure Monitoring lamp will still be ON. In
this situation, the Tire Pressure Monitoring lamp will
turn OFF only after the tires have been inflated to the
vehicle's recommended cold tire placard pressure value.
CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures have
been established for the tire size equipped on your
vehicle. Undesirable system operation or sensor
damage may result when using replacement equip-
ment that is not of the same size, type, and/or style.
After-market 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.
348 STARTING AND OPERATING

CAUTION!
After inspecting or adjusting the tire pressure always
reinstall the valve stem cap. This will prevent mois-
ture and dirt from entering the valve stem, which
could damage the Tire Pressure Monitoring Sensor.
NOTE:
²The TPMS is not intended to replace normal tire care
and maintenance, nor to provide warning of a tire
failure or condition.
²The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
²Driving 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.
²The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver 's responsibility to maintain
correct tire pressure, even if under-inflation has not
reached the level to trigger illumination of the ªTire
Pressure Monitoring Telltale Light.º
²Seasonal temperature changes will affect tire pressure,
and the TPM system will monitor the actual tire
pressure in the tire.
STARTING AND OPERATING 349
5

Tire Pressure Monitor System (TPMS) ªLight
Loadº Reset Switch Description ± If Equipped
WARNING!
Never operate your vehicle with the TPMS and tire
pressures set to the Light Load Inflation Pressure
settings if carrying more than two occupants ( 150 lbs
each) plus 200 pounds of cargo. The vehicle ªLight
Load Definitionº is found in the Supplemental Tire
Pressure Information Label which is located on the
rear face of the driver door. Failure to do so may
cause you to lose control resulting in an accident,
causing serious or fatal injury.The Tire Pressure Monitor (TPM) system ªLight Loadº
reset switch will allow the driver to switch between the
max load inflation pressure (cold) low pressure warning
threshold and the light load inflation pressure (cold) low
pressure warning threshold depending on the vehicle's
load condition. The Tire and Loading Information label
defines the recommended front and rear cold tire infla-
tion pressures for the vehicle when operating in the Max
Load condition. A Supplemental Tire Pressure Informa-
tion label is also available defining Light Load tire
inflation pressures when operating in the Light Load
condition. When the ªLight Loadº reset switch LED is
ON, the Tire Pressure Monitoring (TPM) system is using
the light load inflation pressure (cold) low inflation
warning thresholds and will warn the driver if one or
more of the tire pressures are 25% or more below the
vehicle's defined light load inflation pressures.
350 STARTING AND OPERATING

²The TPMS system will always reset to the max load
inflation pressure (cold) low pressure warning thresh-
old condition when the system experiences a loss of
electrical power. For example, by momentarily discon-
necting the battery or IOD fuse.To switch from the max load inflation pressure (cold) low
pressure warning threshold to the light load inflation
pressure (cold) low pressure warning threshold, the
driver must first lower all four road tire pressures to the
Light Load Inflation Pressure values as listed on the
Supplemental Tire Pressure Information label. The
Supplemental Tire Pressure Information label is located
on the rear face of the driver door. Use an accurate tire
gauge to check the tire pressures when lowering all four
tire pressures. Next proceed to turning the ignition on to
the Run position. This may cause the TPMS low pressure
warning telltale lamp located in the Instrument Cluster to
turn ON and a chime to sound since the tire pressures
have been lowered below the max load inflation pressure
(cold) pressures. After all four tire pressures have been
lowered to the Light Load inflation pressures, press the
ªLight Loadº reset switch. If the ªLight Loadº switch
amber colored LED turns ON, the TPM system low
pressure telltale lamp will illuminate at a tire pressure
Example Supplemental Tire Pressure Label
352 STARTING AND OPERATING