2004 JEEP GRAND CHEROKEE sensor

1. If any tire pressure has exceeded the low or high
pressure (refer to STARTING AND OPERATING Ð
TIRES AND WHEELS), the TPM system will display a
message in the EVIC and sound a chime. It will then go
into the tire pressure display screen and flash the pres-
sure value of the tire that is low or high. This will be
displayed for the rest of the ignition cycle, or until either
the C/T, MENU, STEP, or RESET button is pressed.
NOTE:This display will return 60 seconds after either
the C/T, MENU, STEP, or RESET button is pressed. If a
tire is low or high, you should correct your tire inflation
pressure as soon as possible and inspect all of your tires.
Refer to STARTING AND OPERATING Ð TIRES AND
WHEELS for more details.
Once the low or high tire pressure message has occurred,
it will continue to blink until the tire pressure is cor-
rected.2. If the spare tire pressure has exceeded the low or high
pressure allowed, the TPM system will display a message
in the EVIC for 60 seconds and sound a chime per every
ignition cycle (5 Tire TPM System Only).
NOTE:This message will return every ignition cycle,
until the tire pressures are corrected.
3. When the vehicle is moving and the EVIC cannot
receive a valid sensor signal from the tire pressure
sensors, the TIRE PRESSURE UNAVAILABLE message
will be displayed for 5 seconds along with a chime. The
display will then shift to the individual tire pressure
display screen and display dashes for the tire or tires that
are affected. Once the TIRE PRESSURE UNAVAILABLE
message has been displayed, and valid sensor signals are
received, the EVIC will display the TIRE PRESSURE
NOW AVAILABLE message for 5 seconds along with a
chime. This is meant to inform you when the TPM system
has returned to it's normal operation. This will occur
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 93
3

when valid tire pressure sensor messages have been
received from all 4 road tires. TPM system function is
temporarily unavailable due to external electromagnetic
interference, such as electronic devices or nearby radio or
TV towers.
4. In addition to monitoring the vehicle tires, the TPM
system monitors faults within the system. When any
fault has been set, the TPM system will display TIRE
SENSOR BAD/MISSING. Be sure to inspect your tires for
proper inflation pressure. After you determine that your
tires are properly inflated, see your authorized dealer for
service to diagnose the problem with the TPM system.5. With the 5 Tire TPM System, if a road tire is replaced
by the spare, the TPM system will automatically detect
that the tires have been switched (after the ignition has
been cycled) and display SPARE SWAP DETECTED
along with a chime. This could take up to 10 minutes
with vehicle speed above 25 mph (40 km/h).
6. With the 4 Tire TPM System, if a road tire is replaced
by the spare, the TPM system will display TIRE SENSOR
BAD/MISSING. This is due to the spare tire not being
equipped with a tire pressure sensor. Once the road tire is
repaired and/or installed back on the vehicle with the
proper tire pressure the message will be removed. This
could take up to 10 minutes with vehicle speed above 25
mph (40 km/h).
94 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

TO MEMORY is set to YES) when the remote keyless
entry transmitter is used to unlock the door. Pressing the
STEP button when in this display will select ªYesº or
ªNo.º
Retrain Tire Sensors? (Available with TPM System
Only)
When this feature is selected, the TPM system will start
the retraining procedure (Refer to Training Procedure
below). Pressing the STEP button when in this display
will select ªYesº or ªNo.º Then, press the MENU button
to enter selection.
WARNING!
Death or serious injury can occur if magnetically
sensitive devices are exposed to this magnet. Mag-
nets can affect pacemakers.
NOTE:The tire pressure sensors must be retrained after
rotating the tires or replacing one or more sensors. If a
wheel rotation is not followed by the retrain procedure,
the system will not properly inform you of the correct
vehicle location for a low or high pressure tire.
The following describes how to use this feature:
1. Locate the training magnet under the spare tire
(shaped like a doughnut).
2. Press the MENU button until RETRAIN TIRE SEN-
SORS is displayed.
3. Press the STEP button to select YES to retrain TPM
sensor.
4. Press the MENU button to enter selection.
5. Display will read TRAIN LEFT FRONT TIRE.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 99
3

NOTE:There is a 60 second timer for training the first
tire and a 30 second timer between training the remain-
ing tires. If either of these timers expire, the EVIC will
abort the training procedure.
6. Starting at the left front tire, place the training magnet
over the valve stem until the horn chirps (This takes
approximately 5 seconds).7. Repeat step 6 working clockwise around the vehicle
(Left Front, Right Front, Right Rear, Left Rear, Spare) until
all five TPM sensor positions are trained.
NOTE:The spare tire is only trained with the 5 Tire
TPM System.
100 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Defrost/Floor
Air flows through the front and rear floor outlets
and the outlets at the base of the windshield.
Defrost
Air is directed to the windshield through the
outlets at the base of the windshield.
NOTE:To improve fuel economy, leave in defrost only
when necessary.
Infrared Dual-Zone Climate Control Ð If Equipped
The Infrared Dual-Zone Climate Control System auto-
matically maintains the interior comfort level desired by
the driver and passenger. This is accomplished by using
a dual infrared sensor located in the face of the control
unit. The dual infrared sensor independently measures
the surface temperature of the driver and passenger.
Based on the sensor input, the system automatically
adjusts the air flow temperature, the air flow volume, andamount of outside air recirculation. This maintains a
comfortable temperature even under changing condi-
tions.
Operation of the system is quite simple. Begin by turning
the right mode knob to AUTO. Dial in the temperature
you would like the system to maintain by rotating the
driver's or passenger's control knob. Once the comfort
UNDERSTANDING YOUR INSTRUMENT PANEL 167
4

NTire Spinning........................214
NTread Wear Indicators..................215
NReplacement Tires.....................215
NAlignment And Balance.................217
mTire Pressure Monitor System Ð If Equipped . . . 217
NTire Pressure Monitor System Tire/Wheel
Rotation And Sensor Replacement Ð If
Equipped...........................218
NGeneral Information...................219
mTire Chains...........................220
mTire Rotation Recommendations............220
mFuel Requirements......................221
NReformulated Gasoline.................222
NGasoline/Oxygenate Blends..............222NMMT In Gasoline.....................223
NSulfur In Gasoline.....................223
NMaterials Added To Fuel................224
mFuel Tank Filler Cap (Gas Cap).............224
mTrailer Towing.........................226
NTrailer And Tongue Weight..............228
NCooling System TipsÐTrailer Towing.......229
NMinimum Vehicle Requirements For Trailer
Towing............................230
mRecreational Towing (Behind Motorhome, Etc.) . . 231
NShifting Into Neutral (N)................232
NShifting Out Of Neutral (N)..............233
mSnow Plow...........................234
STARTING AND OPERATING 175
5

Alignment and Balance
The suspension components of your vehicle should be
inspected and aligned when needed, to obtain maximum
tire tread life.
Poor suspension alignment may result in:
²reduced tread life;
²uneven tire wear, such as feathering and one-sided
wear;
²vehicle pull to the right or to the left.
Tires may also cause the vehicle to pull left or right.
Alignment will not correct this problem. See your dealer
for proper diagnosis of the problem.
Improper alignment will not normally cause vehicle
vibration, which may be a result of tire and wheel
out-of-balance. Proper balancing will reduce vibration
and avoid tire cupping and spotty wear.
TIRE PRESSURE MONITOR SYSTEM Ð IF
EQUIPPED
The Tire Pressure Monitor System (TPM) monitors the
pressure in all 4 road tires and the full size spare (5 Tire
TPM System Only). The TPM system uses wireless
technology to monitor tire pressure levels. Sensors,
mounted to each wheel as part of the valve stem, transmit
tire pressure readings to a receiver located in the over-
head console. The tire pressure status is shown in the
Electronic Vehicle Information Center (EVIC) display.
Refer to ªOverhead Consoleº in Section 3 for more
information. The TPM system functions even when the
EVIC is not set on the tire pressure display screen.
The TPM system informs you of a low or high tire
pressure condition. If this occurs, correct your tire infla-
tion pressure as soon as possible, and inspect all of your
tires. Be sure to use a high quality gauge when adjusting
pressure. The TPM system is designed to monitor your
tire pressure but will not function as a tire pressure
STARTING AND OPERATING 217
5

gauge. There will be a delay between the instant you
adjust the air pressure in a tire and when the system
updates the display. The TPM system is not intended to
provide you with notification of rapid air loss.
The following chart indicates the TPM system pressure
levels. A threshold is the level at which the TPM system
provides you with an indication.
High Pressure Threshold 45 psi (310 kPa )
Placard Pressure (Cold) 33 psi (227 kPa)
Low Pressure Threshold 25 psi (172 kPa)
NOTE: A TPM system does not replace normal tire
maintenance.
CAUTION!
The TPM system has been optimized for the original
equipment tires and wheels. TPM system pressures
have been established for the tire size equipped on
your vehicle. Undesirable operation or sensor dam-
age may result when using replacement equipment
that is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor damage. Do
not use tire sealant or balance beads if your vehicle
is equipped with TPM system as damage to the
sensors may result.
Tire Pressure Monitor System Tire/Wheel
Rotation and Sensor Replacement Ð If Equipped
With the 5 Tire TPM System, if a road tire and wheel is
replaced by the spare, the TPM system will detect the
swap automatically (after the ignition has been cycled)
218 STARTING AND OPERATING