2008 CADILLAC CTS service

Federal Communications
Commission (FCC) and Industry
and Science Canada
The Tire Pressure Monitor System (TPMS) operates
on a radio frequency and complies with Part 15 of
the FCC Rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
The TPMS operates on a radio frequency and complies
with RSS-210 of Industry and Science Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
Tire Pressure Monitor Operation
The Tire Pressure Monitor System (TPMS) is designed
to warn the driver when a low tire pressure condition
exists. TPMS sensors are mounted onto each tire
and wheel assembly, excluding the spare tire and wheel
assembly. The TPMS sensors monitor the air pressure
in the vehicle’s tires and transmits the tire pressure
readings to a receiver located in the vehicle.
Using the Driver Information Center (DIC), the driver
can also check tire pressure levels using the DIC.
For additional information and details about the DIC
operation and displays seeDIC Operation and Displays
on page 3-48andDIC Warnings and Messages on
page 3-56.
When a low tire pressure
condition is detected, the
TPMS illuminates the
low tire pressure warning
light located on the
instrument panel cluster.
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TPMS Malfunction Light and Message
The TPMS will not function properly if one or more of
the TPMS sensors are missing or inoperable. When the
system detects a malfunction, the low tire warning light
ashes for about one minute and then stays on for the
remainder of the ignition cycle. A DIC warning message
is also displayed. The low tire warning light and DIC
warning message come on at each ignition cycle until the
problem is corrected. Some of the conditions that can
cause the malfunction light and DIC message to come
on are:
One of the road tires has been replaced with the
spare tire. The spare tire does not have a TPMS
sensor. The DIC message should go off once you
re-install the road tire containing the TPMS sensor.
The TPMS sensor matching process was not
done or not completed successfully after rotating
the vehicle’s tires. The DIC message should go off
after successfully completing the sensor matching
process. See “TPMS Sensor Matching Process”
later in this section.
One or more TPMS sensors are missing or
damaged. The DIC message and the TPMS
malfunction light should go off when the TPMS
sensors are installed and the sensor matching
process is performed successfully. See your
dealer/retailer for service.
Replacement tires or wheels do not match your
vehicle’s original equipment tires or wheels. Tires
and wheels other than those recommended for your
vehicle could prevent the TPMS from functioning
properly. SeeBuying New Tires on page 5-76.
Operating electronic devices or being near facilities
using radio wave frequencies similar to the TPMS
could cause the TPMS sensors to malfunction.
If the TPMS is not functioning it cannot detect or
signal a low tire condition. See your dealer/retailer for
service if the TPMS malfunction light and DIC message
comes on and stays on.
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TPMS Sensor Matching Process
Each TPMS sensor has a unique identication code.
Any time you replace one or more of the TPMS sensors
or rotate your vehicle’s tires, the identication codes
need to be matched to the new tire/wheel position.
The sensors are matched to the tire/wheel positions
in the following order: driver side front tire, passenger
side front tire, passenger side rear tire, and driver
side rear tire using a TPMS diagnostic tool. See your
dealer/retailer for service.
The TPMS sensors can also be matched to each
tire/wheel position by increasing or decreasing the tire’s
air pressure. If increasing the tire’s air pressure, do not
exceed the maximum ination pressure indicated on the
tire’s sidewall. To decrease the tire’s air-pressure use the
pointed end of the valve cap, a pencil-style air pressure
gage, or a key.
You have two minutes to match the rst tire/wheel
position, and ve minutes overall, to match all four
tire/wheel positions. If it takes longer than two minutes,
to match the rst tire and wheel, or more than
ve minutes to match all four tire and wheel positions,
the matching process stops and you need to start over.The TPMS matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to ON/RUN with the
engine off.
3. Press the Remote Keyless Entry (RKE) transmitter’s
lock and unlock buttons at the same time for
approximately ve seconds. The horn sounds twice
to signal the receiver is in relearn mode and Tire
Learning Active message displays on the DIC
screen.
4. Start with the driver side front tire.
5. Remove the valve cap from the valve stem.
Activate the TPMS sensor by increasing or
decreasing the tire’s air pressure for 10 seconds,
or until a horn chirp sounds. The horn chirp, which
can take up to 30 seconds to sound, conrms
that the TPMS sensor identication code has
been matched to this tire position.
6. Proceed to the passenger side front tire, and repeat
the procedure in Step 5.
7. Proceed to the passenger side rear tire, and repeat
the procedure in Step 5.
8. Proceed to the driver side rear tire, and repeat the
procedure in Step 5.
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Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specied
government test course. For example, a tire
graded 150 would wear one and a half (1.5) times
as well on the government course as a tire
graded 100. The relative performance of tires
depends upon the actual conditions of their use,
however, and may depart signicantly from the
norm due to variations in driving habits, service
practices, and differences in road characteristics
and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are
AA, A, B, and C. Those grades represent the tire’s
ability to stop on wet pavement as measured under
controlled conditions on specied government test
surfaces of asphalt and concrete. A tire marked C
may have poor traction performance.
{WARNING:
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
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If the tire has been separated from the wheel, has
damaged sidewalls, or has a puncture larger than a
14inch (6 mm), the tire is too severely damaged for
the tire sealant and compressor kit to be effective.
SeeRoadside Service on page 7-7.
If the tire has a puncture less than a
14inch (6 mm)
in the tread area of the tire, seeTire Sealant and
Compressor Kit (With Sealant Selector Switch) on
page 5-84orTire Sealant and Compressor Kit
(Without Sealant Selector Switch) on page 5-93.
Tire Sealant and Compressor Kit
(With Sealant Selector Switch)
Your vehicle has a tire sealant and compressor kit that
is capable of temporarily sealing a puncture up to 6 mm in
the tread area of the tire. There is no jack or spare tire.
The kit inates the tire with liquid sealant and air. The tire
sealant and compressor kit can also be used to inate
an underinated tire. After the tire is inated to the
recommended ination pressure, seeInflation - Tire
Pressure on page 5-66for more information, the vehicle
must be driven for ve miles to distribute the sealant in
the tire and seal the puncture. After driving ve miles the
tire pressure must be rechecked and adjusted as needed.See Using the Tire Sealant and Compressor Kit later in
this section. Be sure to read and follow all of the tire
sealant and compressor kit instructions. The kit includes:
A. Selector Switch
B. On/Off Button
C. Air Pressure Gage
D. Tire Sealant
CanisterE. Air Compressor
Accessory Plug
F. Sealant/Air Hose
(Clear)
G. Air Only Hose
After temporarily sealing the tire sealant and compressor
kit, it is recommended to take your vehicle to an
authorized dealer/retailer as soon as possible. If the
sealant is removed within 100 miles (161 kilometers) of
driving, then it is easier to clean from the tire and you are
less likely to require a replacement tire.
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Accessing the Tire Sealant and
Compressor Kit
A. Tire Sealant and Compressor Kit
B. Foam Container
C. Wing Nut
To access the tire sealant and compressor kit:
1. Open the trunk. SeeTrunk on page 2-21for more
information.
2. Locate the tire sealant and compressor kit (A) in the
center of the cargo area.3. Remove the tire sealant and compressor kit by
turning the wing nut (C counterclockwise).
4. Remove the sealant and compressor kit from its
foam container (B).
Tire Sealant
Read and follow the safe handling instructions on the
sealant canister.
The sealant can temporarily seal small punctures in the
tread area of the tire. The sealant cannot seal sidewall
damage, large punctures, or a tire that has unseated
from the wheel. SeeRoadside Service on page 7-7if
you need assistance.
The sealant can only be used to seal one tire. After
usage, the sealant canister and sealant lling hose
assembly must be replaced at a dealer/retailer. See
Removal and Installation of Sealant Canister later in
this section.
Check the tire sealant expiration date on the sealant
canister. The sealant might not be effective beyond
the expiration date. If needed, see your dealer/retailer
for a replacement canister.
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Using the Tire Sealant and
Compressor Kit
Follow these directions closely for correct sealant
usage.
A. Selector Switch
B. On/Off Button
C. Air Pressure Gage
D. Tire Sealant
CanisterE. Air Compressor
Accessory Plug
F. Sealant/Air Hose
(Clear)
G. Air Only Hose1. Do a safety check before proceeding. SeeIf a Tire
Goes Flat on page 5-82.
2. Inspect the damaged tire.
The sealant cannot seal sidewall damage, large
punctures, or a tire that has unseated from
the wheel. SeeRoadside Service on page 7-7.
Do not remove any objects that have penetrated
the tire.
3. Place the sealant and compressor kit on the ground
and unwrap the sealant/air hose (F) hose from the
compressor.
The sealant/air hose (F) is the top, clear hose.
4. Remove the valve stem cap from the at tire by
turning it counterclockwise.
5. Attach the sealant lling hose (F) onto the tire valve
stem. Turn it clockwise until it is tight.
6. Unwrap and plug the air compressor accessory
plug (E) into an accessory power outlet in the
vehicle. SeeAccessory Power Outlet(s) on
page 3-22for more information.
Do not pinch the compressor accessory plug cord in
the door or window.
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{CAUTION:
Idling the engine in a closed-in place or with
the climate control system off can cause
deadly carbon monoxide (CO). SeeEngine
Exhaust on page 2-48.
7. Start the vehicle. SeeStarting the Engine on
page 2-35for more information. The vehicle must
be running while using the air compressor.
{CAUTION:
Overination could cause the tire to rupture,
and you or others could be injured. Be sure to
read the inator instructions, and inate the
tire to its recommended pressure. Do not
exceed 36 psi (248 kPa).
8. Turn the selector switch (A) counterclockwise to the
sealant and air position.9. Push the On/Off button (B).
The sealant and compressor kit will inject sealant
and air into the tire. Sealant may leak from the
puncture until the vehicle is driven and the hole
has sealed.
The pressure gage (C) will initially show a high
pressure while the compressor pushes the sealant
into the tire. Once the sealant is completely
dispersed into the tire, the pressure will quickly drop
and start to rise again as the tire inates with air.
10. Inate the tire to the recommended ination
pressure, found on the Tire and Loading Information
label located on the vehicle’s center pillar (B-pillar)
below the vehicle’s door latch, using the air pressure
gage on the top of the unit.
The pressure gage reads high while the compressor
is running. Turn the compressor off to get an
accurate pressure reading.
Notice:If the recommended pressure cannot be
reached after approximately 25 minutes, the vehicle
should not be driven farther. The tire is too severely
damaged and the tire sealant and compressor kit
cannot inate the tire. Remove the air compressor
plug from the accessory power outlet and unscrew
the inating hose from the tire valve. SeeRoadside
Service on page 7-7.
11. Turn the compressor off by pushing the On/Off
button (B).
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