OPERATION
The Tire Pressure Monitoring (TPM) system uses
radio and sensor technology to monitor tire air pres-
sure levels. Sensors, mounted to each road wheel as
part of the valve stem, transmit a low frequency indi-
cating their individual pressure to a receiver located
in the Wireless Control Module (WCM) portion of the
Sentry Key Remote Electronic Entry Module
(SKREEM). These transmissions occur approximately
once every minute at speeds over 20 mph (32 km/h).
The Tire Pressure Monitoring system remains active
even if no tire pressure related message is displayed.
The sensors lay dormant (Park Mode), then wake
and start transmitting (Drive Mode) when the vehicle
first reaches speeds over 20 mph (32 km/h). Once the
wheels stop rotating for a period of approximately 30
minutes, the sensors shut down until again awaken.
Although not transmitting as when in Drive Mode,
while in Park Mode, the sensors still transmit
approximately once every 13 hours to let the receiver
know air pressure status at that time.
The receiver only receives information from the
four rotating tires. A fifth sensor may be located in
the spare tire wheel, depending on vehicle options.
Although this fifth sensor may be present, it does not
broadcast any information because it does not rotate.
When the system detects that a tire is going low,
below the Low Pressure (lamp) ON Threshold (See
following table), the driver is alerted to the situation.
The Base system illuminates an indicator lamp,
warning the driver of a pressure issue and sounds an
audible chime. In equipped with the Premium sys-
tem, the information is also displayed on the Elec-
tronic Vehicle Information Center (EVIC).
Once pressure in the suspect tire raises above the
Low Pressure (lamp) OFF Threshold, the lamp will
go out and the system returns to normal.
TPM THRESHOLD PRESSURES
DESCRIPTION SPECIFICATION
Placard Pressure (Cold) 36 PSI (248 kPa)
Low Pressure OFF Threshold 33 PSI (228 kPa)
Low Pressure ON Threshold 28 PSI (193 kPa)
SENSOR - TPM
DESCRIPTION
On vehicles equipped with Tire Pressure Monitor-
ing, one tire pressure sensor is mounted to each road
wheel (Fig. 18), and depending on factory wheel
options, a sensor may be located in the spare tire
wheel. Both aluminum and steel wheels are used in
this system, although sensors for one type wheel can-
not be used in the other type wheel.Each sensor has an internal battery that lasts up
to 10 years. The battery is not serviceable. At the
time of battery failure, the sensor must be replaced.
The serviceable components of the tire pressure sen-
sor are:
²Sensor-To-Wheel Grommet
²Valve Stem Cap
²Valve Stem Core
Valve stem caps and cores are specifically designed
for the tire pressure monitoring sensors. Although
similar to standard valve stem caps and cores, they
are different.
CAUTION: Do not use a standard valve stem cap or
core in a tire pressure sensor. Always use the orig-
inal equipment style sensor cap and core.
CAUTION: Do not reuse the Sensor-To-Wheel Grom-
met. Always use a new grommet when installing a
pressure sensor and properly torque the sensor
nut.
CAUTION: Do not attempt to install a tire pressure
sensor in an aftermarket wheel. Use only in original
style factory wheels.
OPERATION
The battery operated tire pressure sensors lay dor-
mant (Park Mode), then wake and start transmitting
(Drive Mode) when the vehicle first reaches speeds
over 20 mph (32 km/h). Once the wheels stop rotat-
ing for a period of approximately 30 minutes, the
sensors shut down until again awaken. Although not
transmitting as when in Drive Mode, while in Park
Mode, the sensors still transmit approximately once
every 13 hours to let the receiver know air pressure
status at that time.
Each sensor transmits tire pressure data approxi-
mately once every minute. Each sensor's (transmit-
ter) broadcast is uniquely coded so that the wireless
control module (WCM) can monitor the state of each
of the sensors on the four rotating road wheels. The
WCM (located in the SKREEM) automatically learns
and stores the sensor's ID while driving after a sen-
sor has been replaced. There is no retraining neces-
sary.
The receiver only receives information from the
four rotating tires. A fifth sensor may be located in
the spare tire wheel, depending on vehicle options.
Although this fifth sensor may be present, it does not
broadcast any information because it does not rotate.
For additional information, refer to Appropriate
Diagnostic Information.
22 - 10 TIRES/WHEELSRS
TIRE PRESSURE MONITORING (Continued)
CAUTION
CAUTION: The use of tire sealants is strictly prohib-
ited for vehicles equipped with the Tire Pressure
Monitoring system. Tire sealants can clog tire pres-
sure sensors.
CAUTION: Tire pressure sensor valve stem caps
and cores are specially designed for the sensors.
Due to risk of corrosion, do not use a standard
valve stem cap or core in a tire pressure sensor in
place of the original equipment style sensor cap
and core.
CAUTION: Do not attempt to install a tire pressure
sensor in a steel wheel or aftermarket wheel. Use
tire pressure sensors in original style factory
wheels only.
NOTE: TPM thresholds have been established for
the original tire size equipped on the vehicle. Use
original size tires only to maintain system accuracy.
DIAGNOSIS AND TESTING - TIRE PRESSURE
SENSOR
NOTE: Tire pressure may increase from 2 to 6 psi
(14 to 41 kPa) during normal driving conditions. Do
NOT reduce this normal pressure build up.
If a fault in the system is detected, always check
air pressure in the tires first with a known accurate
air gauge and correct the inflation pressure. If any
tire is low, inspectallthe tires.
If the gauge-read pressure in the tires does not
indicate a tire pressure issue, refer to the appropri-
ate diagnostic information.
REMOVAL
(1) Remove tire and wheel assembly from vehicle.
(Refer to 22 - TIRES/WHEELS - REMOVAL)
CAUTION: The cap used on this valve stem con-
tains an O-ring seal to prevent contamination and
moisture from entering the valve stem. Retain this
valve stem cap for reuse. Do not substitute a regu-
lar valve stem cap in its place.
CAUTION: The valve stem used on this vehicle is
made of aluminum and the core is nickel plated
brass. The original valve stem core must be rein-
stalled and not substituted with a valve stem core
made of a different material. This is required to pre-
vent corrosion in the valve stem caused by the dif-
ferent metals.(2) Dismount tire from wheel following tire
changer manufacturers instructions while paying
special attention to the following to avoid damaging
the pressure sensor:
(a) When breaking the tire bead loose from the
wheel rim, avoid using the Bead Breaker in the
area of the sensor. That includes both front and
rear beads of the tire.
(b) When preparing to dismount the tire from
the wheel, carefully insert the mounting/dimount-
ing tool at the valve stem 10É (Fig. 17), then pro-
ceed to dismount the tire from the wheel. Use this
process on both the upper and lower tire beads.
(3) Using a thin wall socket, remove special nut
retaining sensor to wheel (Fig. 18).
(4) Remove sensor from wheel (Fig. 18).
INSTALLATION
NOTE: Before reinstalling a tire pressure sensor,
replace sealing grommet at base of valve stem.
(1) Wipe area clean where sensor sealing grommet
contacts wheel. Make sure surface of wheel is not
damaged.
(2) Install sensor in wheel as shown (Fig. 18). Do
not attempt to mount sensor otherwise, damage may
occur.
(3) Using a thin wall socket, install special sensor
nut (Fig. 18). Tighten nut to 4 N´m (35 in. lbs.)
torque.
Fig. 17 Start Mount/Dismount Tool Within 10
Degrees Of Valve Stem
RSTIRES/WHEELS22-11
SENSOR - TPM (Continued)
Inflation pressures specified on the Tire Inflation
Pressure Label are always the cold inflation pressure
of the tire. Cold inflation pressure is obtained after
the vehicle has not been operated for at least 3
hours, or the vehicle is driven less than one mile
after being inoperative for 3 hours. Tire inflation
pressures may increase from 2 to 6 pounds per
square inch (psi) (14 to 41 kPa) during operation. Do
not reduce this normal pressure buildup.
Improper inflation can cause:
²Uneven wear patterns
²Reduced tread life
²Reduced fuel economy
²Unsatisfactory ride
²The vehicle to drift.
WARNING: OVER OR UNDER INFLATED TIRES CAN
AFFECT VEHICLE HANDLING. THE TIRE CAN FAIL
SUDDENLY, RESULTING IN LOSS OF VEHICLE
CONTROL.
Under inflation causes rapid shoulder wear, tire
flexing, and can result in tire failure (Fig. 24).
Over inflation causes rapid center wear and loss of
the tire's ability to cushion shocks (Fig. 25).
STANDARD PROCEDURE - TIRE PRESSURE
FOR HIGH SPEED OPERATION
DaimlerChrysler Corporation advocates driving at
safe speeds within posted speed limits. Where speed
limits allow the vehicle to be driven at high speeds,
correct tire inflation pressure is very important.
Vehicles loaded to maximum capacity should not be
driven at continuous speeds over 120 km/h (75 mph).
Never exceed the maximum speed capacity of the
tire. For information on tire identification and speed
ratings, (Refer to 22 - TIRES/WHEELS/TIRES -
DESCRIPTION).
STANDARD PROCEDURE - TIRE LEAK
REPAIRING
For proper repairing, a radial tire must be removed
from the wheel. Repairs should only be made if the
defect, or puncture, is in the tread area (Fig. 26). The
tire should be replaced if the puncture is located in
the sidewall.
Deflate tire completely before attempting to dis-
mount the tire from the wheel.Use a lubricant
such as a mild soap solution when dismounting
or mounting tire.Use tools free of burrs or sharp
edges which could damage the tire or wheel rim.
Before mounting tire on wheel, make sure all rust
is removed from the rim bead and repaint if neces-
sary.
Install wheel on vehicle, and progressively tighten
the 5 wheel nuts to a torque of 135 N´m (100 ft. lbs.).
Fig. 24 Under Inflation Wear
1 - THIN TIRE TREAD AREAS
Fig. 25 Over Inflation Wear
1 - THIN TIRE TREAD AREA
RSTIRES/WHEELS22-17
TIRES (Continued)
DIAGNOSIS AND TESTING - WHEEL
INSPECTION
Inspect wheels for:
²Excessive runout
²Dents, cracks or irregular bends
²Damaged wheel stud (lug) holes
²Air Leaks
NOTE: Do not attempt to repair a wheel by hammer-
ing, heating or welding.
If a wheel is damaged, an original equipment
replacement wheel should be used. When obtaining
replacement wheels, they must be equivalent in load
carrying capacity. The diameter, width, offset, pilot
hole and bolt circle of the wheel should be the same
as the original wheel.
WARNING: FAILURE TO USE EQUIVALENT
REPLACEMENT WHEELS MAY ADVERSELY
AFFECT THE SAFETY AND HANDLING OF THE
VEHICLE.
WARNING: REPLACEMENT WITH USED WHEELS IS
NOT RECOMMENDED. THE SERVICE HISTORY OF
THE WHEEL MAY HAVE INCLUDED SEVERE TREAT-
MENT OR VERY HIGH MILEAGE. THE RIM COULD
FAIL WITHOUT WARNING.
CLEANING
WHEEL AND WHEEL TRIM CARE
All wheels and wheel trim, especially aluminum
and chrome plated, should be cleaned regularly using
mild soap and water to maintain their luster and to
prevent corrosion. Wash them with the same soap
solution recommended for the body of the vehicle.
When cleaning extremely dirty wheels, care must
be taken in the selection of tire and wheel cleaning
chemicals and equipment to prevent damage to the
wheels. MopartWheel Treatment or MopartChrome
Cleaner is recommended. Any of the ªDO NOT USEº
items listed below can damage wheels and wheel
trim.DO NOT USE:
²Any abrasive cleaner
²Any abrasive cleaning pad (such as steel wool)
or abrasive brush
²Any cleaner that contains an acid which can
react with and discolor the chrome surface.Many
wheel cleaners contain acids that can harm the
wheel surface.
²Oven cleaner
²A car wash that uses carbide-tipped wheel clean-
ing brushes or acidic solutions.
SPECIFICATIONS
WHEEL
SPECIFICATIONS
DESCRIPTION SPECIFICATION
Wheel Mounting (Lug)
Nut Hex Size19 mm
Wheel Mounting Stud
SizeM12 x 1.5 mm
TORQUE SPECIFICATIONS
DESCRIPTION N´mFt.
Lbs.In.
Lbs.
TPM Sensor Mounting Nut 4 Ð 35
Wheel Mounting (Lug ) Nut 135 100 Ð
WHEEL COVER
DESCRIPTION
This vehicle uses a bolt-on type wheel cover (Fig.
29).
This bolt-on wheel cover cannot be removed from
the wheel until three of the five wheel mounting nuts
shown are removed (Fig. 29). The bolt-on wheel cover
can then be removed with the remaining two wheel
nuts tightened in place.
REMOVAL
(1) Noting the location of the valve stem in rela-
tionship to the wheel mounting nuts, remove the
three wheel mounting nuts securing the wheel cover
to the wheel and hub (Fig. 29).
CAUTION: When removing the wheel cover, do not
pry the wheel cover from the wheel. This can result
in damage to the wheel cover. The wheel cover is
removed by pulling it off the wheel by hand.
RSTIRES/WHEELS22-19
WHEELS (Continued)
(2) Grasp the wheel cover at the edges in line with
the remaining installed wheel nuts and pull straight
outward from the wheel. This will pop the wheel
cover retaining tabs over the two remaining wheel
nuts, removing the wheel cover from the wheel.
INSTALLATION
NOTE: Wheel mounting nuts must be installed on
the studs as shown to allow installation of the
wheel cover (Fig. 30).
(1) Place the wheel cover on the wheel in the fol-
lowing fashion:(a) Align the valve notch in the wheel cover with
the valve stem on the wheel.
(b) At the same time, align the two holes in the
wheel cover having the retaining tabs with the two
installed wheel nuts (Fig. 31).
(c) Press in on center of wheel cover until wheel
cover retaining tabs push past and engage rear of
previously installed wheel mounting nuts (Fig. 31).
This will hold the wheel cover in place.
(2) Install andlightly tightenthe three remain-
ing wheel mounting nuts, securing the wheel cover in
place (Fig. 29).
(3) Tighten all five wheel mounting nuts in the
proper sequence (Fig. 32). Tighten wheel nuts to a
torque of 135 N´m (100 ft. lbs.).
Fig. 29 Nuts Securing Wheel Cover
1 - VALVE STEM
2 - BOLT-ON WHEEL COVER
3 - NUTS SECURING WHEEL COVER
Fig. 30 Two Wheel Mounting Nuts Installed
1 - WHEEL
2 - VALVE STEM
3 - HUB PILOT
4 - NUTS
Fig. 31 Wheel Cover Installation Over Two Nuts
1 - RETAINING TABS
2 - VALVE STEM
3 - BOLT-ON WHEEL COVER
Fig. 32 Nut Tightening Sequence
22 - 20 TIRES/WHEELSRS
WHEEL COVER (Continued)
WHEEL MOUNTING STUDS -
FRONT
REMOVAL
NOTE: Before proceeding, (Refer to 5 - BRAKES -
WARNING)(Refer to 5 - BRAKES - CAUTION).
CAUTION: Wheel mounting studs MUST NOT be
hammered out of hub flange of hub and bearing
assembly. If a stud is removed by hammering it out,
damage to hub and bearing assembly will occur
leading to premature bearing failure.
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(2) Remove front wheel and tire assembly. (Refer
to 22 - TIRES/WHEELS - REMOVAL)
(3) Remove two adapter mounting bolts securing
disc brake caliper adapter to steering knuckle (Fig.
33).
(4) Remove disc brake caliper and adapter as
assembly from steering knuckle (Fig. 33). Hang
assembly out of way using wire or a bungee cord.
Use care not to overextend brake hose when doing
this.
(5) Remove brake rotor from hub by pulling it
straight off wheel mounting studs (Fig. 33).(6) On wheel mounting stud to be removed, install
a wheel mounting (lug) nut far enough so the threads
on the stud are even with end of nut. Install
Remover, Special Tool C-4150A, on hub and bearing
flange and wheel stud (Fig. 34).
(7) Tighten down on Remover, pushing wheel stud
out of hub flange. Once shoulder of wheel stud is
past flange, remove special tool. Remove nut from
stud and remove stud from hub flange.
INSTALLATION
(1) Install replacement wheel stud into flange of
hub and bearing from rear. Install washers on wheel
stud, then install a standard type wheel mounting
(lug) nut on stud with flat side of lug nut against
washers as shown (Fig. 35).
(2) Tighten nut, pulling wheel stud into hub
flange. Once head of stud is fully seated against rear
of hub flange, remove nut and washers from stud.
(3) Install brake rotor back on hub and bearing
(Fig. 33).
(4) Install brake caliper and adapter back over
brake rotor aligning adapter with mounting holes on
steering knuckle (Fig. 33).
(5) Install two adapter mounting bolts securing
adapter to steering knuckle. Tighten mounting bolts
to 169 N´m (125 ft. lbs.) torque.
(6) Install wheel and tire assembly. Tighten wheel
mounting (lug) nuts in proper sequence to 135 N´m
(100 ft. lbs.) torque.
(7) Lower vehicle.
Fig. 33 Front Brake Mounting
1 - BRAKE ROTOR
2 - HUB AND BEARING
3 - STEERING KNUCKLE
4 - ADAPTER MOUNTING BOLTS
5 - BRAKE CALIPER
6 - ADAPTER
7 - CLIP
Fig. 34 Wheel Stud Removal (Typical)
1 - WHEEL MOUNTING (LUG) NUT
2 - HUB AND BEARING ASSEMBLY
3 - SPECIAL TOOL C-4150A
4 - STEERING KNUCKLE
5 - WHEEL STUD
RSTIRES/WHEELS22-21
(8) Road test vehicle to ensure proper operation of
the brakes.
WHEEL MOUNTING STUDS -
REAR
REMOVAL
CAUTION: If a wheel attaching stud needs to be
replaced in the hub and bearing assembly the studs
MUST NOT be hammered out of the hub flange. If a
stud is removed by hammering it out of the bearing
flange, damage to the hub and bearing assembly
will occur leading to premature hub and bearing
failure.
(1) Raise vehicle on jackstands or centered on a
frame contact type hoist. See Hoisting in Lubrication
and Maintenance.
(2) Remove the rear wheel and tire assembly.
(3) Remove the brake drum or disc brake caliper
and rotor. Refer to Brakes.
(4) Install a lug nut on the wheel stud to be
removed from the hub and bearing assembly (Fig. 36)
so the threads on stud are even with end of lug nut.
Install Remover, Special Tool C-4150A on hub and
bearing assembly flange and wheel stud (Fig. 36).
(5)
Tightening down on special tool will push wheel
stud out of the hub and bearing assembly flange.
(6) Remove lug nut from stud and remove wheel
stud from flange.
INSTALLATION
(1) Install replacement wheel stud into flange of
hub and bearing assembly. Install washers on wheelstud, then install a wheel lug nut on stud with flat
side of lug nut against washers (Fig. 37).
(2) Tighten the wheel lug nut, pulling the wheel
stud into the flange of the hub and bearing assembly.
When the head of the stud is fully seated against the
bearing flange, remove lug nut and washers from
wheel stud.
(3) Install the brake drum or disc brake rotor and
caliper on the hub and bearing assembly.
(4) Install wheel and tire assembly on vehicle.
Tighten the wheel mounting stud nuts in proper
sequence until all nuts are torqued to half specifica-
tion. Then repeat the tightening sequence to the full
specified torque of 135 N´m (100 ft. lbs.).
(5) Lower vehicle to the ground.
Fig. 35 Installing Wheel Stud (Typical)
1 - WASHERS
2 - HUB AND BEARING ASSEMBLY
3 - WHEEL MOUNTING (LUG) NUT
4 - STEERING KNUCKLE
Fig. 36 Wheel Stud Removal From Hub And Bearing
1 - HUB AND BEARING ASSEMBLY
2 - WHEEL MOUNTING (LUG) NUT
3 - WHEEL STUD
4 - SPECIAL TOOL C-4150A
Fig. 37 Wheel Stud Installation
1 - WHEEL MOUNTING (LUG) NUT
2 - HUB AND BEARING ASSEMBLY
3 - WASHERS
4 - WHEEL STUD
22 - 22 TIRES/WHEELSRS
WHEEL MOUNTING STUDS - FRONT (Continued)
CHECK STRAP
REMOVAL
(1) Remove front door trim panel.
(2) Remove front door watershield (Refer to 23 -
BODY/DOOR - FRONT/WATERSHIELD -
REMOVAL).
(3) Remove front door speaker, if equipped.
(4) Remove bolts attaching door check strap to
A-pillar.
(5) Remove nuts attaching check strap to door end
frame (Fig. 2).
(6) Remove check strap from door through speaker
hole.
INSTALLATION
(1) Position check strap on door through speaker
hole.
(2) Install nuts to attach check strap to door end
frame. Tighten nuts to 11 N´m (90 in. lbs.) torque.
(3) Install bolts to attach check strap to A-pillar.
Tighten bolts to 12 N´m (105 in. lbs.) torque.
(4) Install door speaker, if equipped.
(5) Install front door trim panel.
DOOR
REMOVAL
(1) Remove front wheelhouse splash shield. (Refer
to 23 - BODY/EXTERIOR/LF WHEELHOUSE
SPLASH SHIELD - REMOVAL)
(2) Disengage clips attaching door harness wire
connector to inner fender brace.
(3) Disconnect positive lock slide on the side of the
wire connectors (Fig. 3).
(4) Depress lock tab attaching wire connector
halves together.
(5) Disconnect door harness from body wiring har-
ness.
(6) Remove bolts attaching door check strap to
A-pillar (Fig. 4).
(7) Support door on suitable lifting device.
(8) Remove bolts attaching lower hinge to door end
frame (Fig. 5).
(9) Steady door on lifting device and remove bolts
attaching upper hinge to door end frame.
(10) Remove door from vehicle.
INSTALLATION
NOTE: If new hinge pins are to be used, verify that
the knurling on the hinge pin is aligned with the
knurling on in the door hinge prior to driving in the
pin. Also, verify that the hinge pin is fully seated to
the door hinge and a new retaining clip is installed.
(1) Support door on suitable lifting device.
Fig. 1 FRONT DOOR APPLIQUE
1 - GLASS RUN WEATHERSTRIP
2 - CLIPS
3 - APPLIQUE
4 - FRONT DOOR
Fig. 2 FRONT DOOR CHECK STRAP
1 - FRONT DOOR
2 - DOOR CHECK STRAP
RSDOOR - FRONT23-15
APPLIQUE (Continued)