sensor BUICK LUCERNE 2007 User Guide

There is also an exterior temperature sensor
located behind the front grille. This sensor reads
the outside air temperature and helps maintain
the temperature inside the vehicle. Any cover on
the front of the vehicle could cause a false
reading in the displayed temperature.
In order to prevent false temperature readings at
startup, the displayed temperature will not
change until the following occurs:
Vehicle speed is above 10 mph (16 k/mh) for
5 minutes.
Vehicle speed is above 32 mph (51 k/mh) for
2 and a half minutes.
The climate control system uses the information
from these sensors to maintain your comfort setting
by adjusting the outlet temperature, fan speed, and
the air delivery mode. The system may also supply
cooler air to the side of the vehicle facing the sun.
The recirculation mode will also be used as needed
to maintain cool outlet temperatures.
Defogging and Defrosting
Fog on the inside of windows is a result of high
humidity (moisture) condensing on the cool window
glass. This can be minimized if the climate control
system is used properly. There are two modes to
clear fog from your windshield, defog and defrost.
W(Floor/Defog):Use this mode to clear the
windows of fog or moisture and to warm the
passengers. Turning the control to this mode
directs about half of the air to the oor outlets and
the remaining air is directed to the side window
outlets and to the windshield. When you select this
mode, the system turns off recirculation and runs
the air-conditioning compressor unless the
outside temperature is at or below freezing.
The recirculation mode cannot be selected while
in the oor/defog mode.
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Passenger Safety Belt
Reminder Light
Several seconds after the key is turned to RUN or
START, a chime will sound for several seconds to
remind the front passenger to buckle their safety
belt. This would only occur if the passenger airbag
is enabled. SeePassenger Sensing System on
page 81for more information. The passenger
safety belt light will also come on and stay on for
several seconds, then it will ash for several more.
This chime and light
will be repeated if the
passenger remains
unbuckled and the
vehicle is in motion.
If the passenger’s safety belt is buckled, neither
the chime nor the light will come on.
Airbag Readiness Light
There is an airbag readiness light on the instrument
panel, which shows the airbag symbol. The system
checks the airbag’s electrical system for
malfunctions. The light tells you if there is an
electrical problem. The system check includes the
airbag sensors, the airbag modules, the wiring and
the diagnostic module. For more information on the
airbag system, seeAirbag System on page 70.
This light will come on
when you start your
vehicle, and it will ash
for a few seconds. Then
the light should go out.
This means the system
is ready.
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Units
Press the vehicle information button until UNITS
displays. This display allows you to select between
English or Metric units of measurement. Once in
this display, press the set/reset button to select
between ENGLISH or METRIC units.
Tire Pressure
The pressure for each tire can be viewed in the
DIC. The tire pressure will be shown in either
pounds per square inch (psi) or kilopascals (kPa).
Press the vehicle information button until the
DIC displays FRONT TIRES PSI (kPa) LEFT ##
RIGHT ##. Press the vehicle information button
again until the DIC displays REAR TIRES
PSI (kPa) LEFT ## RIGHT ##.
If a low or high tire pressure condition is detected by
the system while driving, a message advising you
to check the pressure in a specic tire will appear
in the display. SeeInation - Tire Pressure on
page 392andDIC Warnings and Messages on
page 221for more information.
If the tire pressure display shows dashes instead of
a value, there may be a problem with your vehicle.
If this consistently occurs, see your dealer for
service.
Learn Tire Positions
To access this display, the vehicle must be in
PARK (P). After rotating the tires or after replacing
a tire or sensor, the Tire Pressure Monitor (TPM)
system must re-learn the tire positions. To re-learn
the tire positions, seeTire Pressure Monitor System
on page 393. SeeTire Inspection and Rotation on
page 398andDIC Warnings and Messages on
page 221for more information.
Compass Zone
Your vehicle may have this feature. Under
certain circumstances, such as during a long
distance cross-country trip, it will be necessary to
compensate for compass variance and reset the
zone. To change the compass zone through the
DIC, seeDIC Compass on page 218.
Compass Calibration
The compass can be manually calibrated. To
calibrate the compass through the DIC, seeDIC
Compass on page 218.
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REMOTE KEY LEARNING ACTIVE
This message displays while you are matching
a Remote Keyless Entry (RKE) transmitter to your
vehicle. See “Matching Transmitter(s) to Your
Vehicle” underRemote Keyless Entry (RKE)
System Operation on page 95andDIC Controls
and Displays on page 212for more information.
REPLACE BATTERY IN REMOTE KEY
This message displays when the battery in the
Remote Keyless Entry (RKE) transmitter needs to
be replaced. To replace the battery, see “Battery
Replacement” underRemote Keyless Entry (RKE)
System Operation on page 95.
RIGHT REAR DOOR OPEN
This message displays when the passenger’s
side rear door is not closed properly. When this
message appears, make sure that the passenger’s
door is closed completely.
SERVICE A/C (Air Conditioning)
SYSTEM
This message displays when the electronic
sensors that control the air conditioning and
heating systems are no longer working. Have the
climate control system serviced by your dealer
if you notice a drop in heating and air conditioning
efficiency.
SERVICE AIR BAG
This message displays when there is a problem
with the airbag system. Have your vehicle serviced
by your dealer immediately. SeeAirbag Readiness
Light on page 197for more information.
SERVICE BATTERY CHARGING
SYSTEM
This message displays when there is a problem
with the generator and battery charging systems.
Driving with this problem could drain the battery.
Turn off all unnecessary accessories. Stop
and turn off the vehicle as soon as it is safe to do
so. Have the electrical system checked by your
dealer immediately.
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SERVICE STABILITRAK
If your vehicle has StabiliTrak®, this message
displays if there has been a problem detected with
StabiliTrak
®. A warning light also appears on
the instrument panel cluster. SeeTraction Control
System (TCS) Warning Light on page 202. See
StabiliTrak
®System on page 284for more
information.
If this message turns on while you are driving, pull
off the road as soon as possible and stop carefully.
Try resetting the system by turning the ignition off
and then back on. If this message still stays on or
turns back on again while you are driving, your
vehicle needs service. Have the StabiliTrak
®
System inspected by your dealer as soon as
possible.
SERVICE SUSPENSION SYSTEM
This message displays to indicate that the
suspension system is not operating properly.
See your dealer for service.
SERVICE THEFT SYSTEM
This message displays when there is a problem
with the theft-deterrent system programmed in the
key. A fault has been detected in the system which
means that the system is disabled and it is not
protecting the vehicle. The vehicle usually restarts;
however, you may want to take the vehicle to
your dealer before turning off the engine. See
PASS-Key
®III+ on page 111for more information.
SERVICE TIRE MONITOR SYSTEM
This message displays if a part on the Tire
Pressure Monitor (TPM) system is not working
properly. If you drive your vehicle while any of the
four sensors are missing or inoperable, the warning
comes on in about 20 minutes. A sensor would be
missing, for example, if you put different wheels on
your vehicle without transferring the sensors. If the
warning comes on and stays on, there may be a
problem with the TPM. See your dealer.
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THEFT ATTEMPTED
This message displays if the content theft-deterrent
system has detected a break-in attempt while
you were away from your vehicle. SeeContent
Theft-Deterrent on page 110for more information.
TIGHTEN GAS CAP
This message may be displayed if the gas cap is
not on, or is not fully tightened. Check the gas
cap to ensure that it is on properly. SeeFilling the
Tank on page 330for more information.
TIRE LEARNING ACTIVE
This message displays when the Tire Pressure
Monitor (TPM) system is re-learning the tire
positions. SeeTire Pressure Monitor System on
page 393. The tire positions must be re-learned
after rotating the tires or after replacing a tire
or sensor. SeeTire Inspection and Rotation on
page 398andInation - Tire Pressure on page 392
for more information.
TRACTION CONTROL OFF
This message displays when the Traction Control
System (TCS) is turned off. Adjust your driving
accordingly. SeeTraction Control System
(TCS) on page 283for more information.
TRACTION CONTROL ON
This message displays when the Traction Control
System (TCS) is turned on. SeeTraction Control
System (TCS) on page 283for more information.
TRANSMISSION HOT IDLE ENGINE
This message displays when the transaxle uid in
your vehicle is too hot. Stop the vehicle and
allow it to idle until it cools down. If the warning
message continues to display, have the vehicle
serviced by your dealer as soon as possible.
TRUNK OPEN
This message displays when the trunk is not
closed completely. Make sure that the trunk is
closed completely. SeeTrunk on page 106.
230

For additional information regarding how much
weight your vehicle can carry, and an example of
the Tire and Loading Information label, see
Loading Your Vehicle on page 307. How you load
your vehicle affects vehicle handling and ride
comfort. Never load your vehicle with more weight
than it was designed to carry.
When to Check
Check your tires once a month or more. Do not
forget to check the compact spare tire, it should be
at 60 psi (420 kPa). For additional information
regarding the compact spare tire, seeCompact
Spare Tire on page 418.
How to Check
Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your tires are
properly inated simply by looking at them. Radial
tires may look properly inated even when they
are under-inated. Check the tire’s ination
pressure when the tires are cold. Cold means your
vehicle has been sitting for at least three hours
or driven no more than 1 mile (1.6 km).Remove the valve cap from the tire valve stem.
Press the tire gage rmly onto the valve to
get a pressure measurement. If the cold tire
ination pressure matches the recommended
pressure on the Tire and Loading Information
label, no further adjustment is necessary. If the
ination pressure is low, add air until you reach the
recommended amount.
If you overll the tire, release air by pushing on
the metal stem in the center of the tire valve.
Re-check the tire pressure with the tire gage.
Be sure to put the valve caps back on the valve
stems. They help prevent leaks by keeping out dirt
and moisture.Tire Pressure Monitor System
Your vehicle has a Tire Pressure Monitor System
(TPMS). This system uses radio and sensor
technology to check tire pressure levels. The
TPMS sensors are mounted onto each tire and
wheel assembly, except for the spare tire.
The TPMS sensors monitor the air pressure in
your vehicle’s tires and transmit tire pressure
readings to a receiver located in the vehicle.
393

Your vehicle’s TPMS system can warn you about a
low tire pressure condition but it does not replace
normal tire maintenance. SeeTire Inspection and
Rotation on page 398andTires on page 385.
Notice:Do not use a tire sealant if your
vehicle has Tire Pressure Monitors. The liquid
sealant can damage the tire pressure monitor
sensors.
The TPMS will not function properly if one or more
of the TPMS sensors are missing or inoperable.
If the system detects a missing or inoperable
sensor, an error message SERVICE TIRE
MONITOR SYSTEM will be shown on the DIC
display. If you have replaced a tire/wheel assembly
without transferring the TPMS sensors, the error
message will be displayed. Once you re-install the
TPMS sensors, the error message should go
off. See your GM dealer for service if all TPMS
sensors are installed and the error message
comes on and stays on.Resetting the TPMS Sensor
Identication Codes
Each TPMS sensor has a unique identication
code. Any time you replace one or more of
the TPMS sensors or rotate the vehicle’s tires, the
identication codes will need to be matched to
the new tire/wheel position. The sensors are
matched, to the tire/wheel positions, in the
following order: driver’s side front tire, passenger’s
side front tire, passenger’s side rear tire, and
driver’s side rear tire using a TPMS diagnostic tool.
See your GM dealer for service.
The TPMS sensors may also be matched to each
tire/wheel position by increasing or decreasing
the tire’s air pressure. When increasing the tire’s
pressure, do not exceed the maximum ination
pressure indicated on the tire’s sidewall.
You will have two minutes to match each tire and
wheel position. If it takes longer than two minutes to
match any tire and wheel position, or more than
ve minutes to match all four tire and wheel
positions the matching process stops and you will
need to start over.
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The TPMS matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to RUN with the
engine off.
3. Using the DIC, press the vehicle information
button until the LEARN TIRE POSITIONS
message displays.
4. Press the set/reset button to allow the system
to learn the tire positions. The horn will sound
twice to indicate the receiver is ready, and
the TIRE LEARNING ACTIVE message
will display. The TPMS system is ready for
the sensor matching process to begin.
5. Start with the driver’s side front tire.
6. Remove the valve cap from the tire’s valve
stem. Activate the TPMS sensor by increasing
or decreasing the tire’s air pressure for
ve seconds, or until a horn chirp sounds.
The horn chirp, which may take up to
30 seconds to sound, conrms that the
sensor identication code has been matched
to the tire/wheel position. To decrease the
tire’s air-pressure use the pointed end of the
valve cap, a pencil-style air pressure gage,
or a key.7. Proceed to the passenger’s side front tire, and
repeat the procedure in Step 6.
8. Proceed to the passenger’s side rear tire, and
repeat the procedure in Step 6.
9. Proceed to the driver’s side rear tire, and
repeat the procedure in Step 6.
10. After hearing the conrming horn chirp for the
driver’s side rear tire, the tire learning process
ends. Turn the ignition switch to OFF.
11. Set all four tires to the recommended air
pressure level as indicated on the tire and
loading information label.
12. Put the valve caps back on the valve stems.
The compact spare tire and wheel assembly
does not have a TPMS sensor. If you replace
one of the road tires with the compact spare tire,
the SERVICE TIRE MONITOR SYSTEM
message will be displayed on the DIC display
screen. This message should go off once
you re-install the road tire containing the
TPMS sensor.
397

When rotating your tires, always use the correct
rotation pattern shown here.
Do not include the compact spare tire in your tire
rotation.
After the tires have been rotated, adjust the
front and rear ination pressures as shown
on the Tire and Loading Information label. See
Ination - Tire Pressure on page 392andLoading
Your Vehicle on page 307.Reset the Tire Pressure Monitor System. See
“TPMS Sensor Identication Codes” under
Tire Pressure Monitor System on page 393.
Make certain that all wheel nuts are properly
tightened. See “Wheel Nut Torque” under
Capacities and Specications on page 436.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after time. The wheel could
come off and cause an accident. When
you change a wheel, remove any rust or
dirt from places where the wheel attaches
to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this;
but be sure to use a scraper or wire brush
later, if needed, to get all the rust or dirt
off. SeeChanging a Flat Tire on page 408.
399