2009 CADILLAC XLR service

Brake System Warning Light
The vehicle’s hydraulic brake system is divided into
two parts. If one part is not working, the other part can
still work and stop the vehicle. For good braking,
though, both parts need to be working well.
This light should come on when the engine is started.
If it does not come on then, have it xed so it will
be ready to warn if there is a problem.
If this warning light stays on after the engine is started,
the parking brake may still be set or there could be
a brake problem. Refer toParking Brake on page 2-32
to see if it is set. If the parking brake is not set, have
the brake system inspected right away.If the light comes on while driving and a LOW BRAKE
FLUID message is showing on the DIC, pull off the road
and stop carefully. The pedal may be harder to push.
Or, the pedal may go closer to the oor and it may take
longer to stop. If the light is still on, have the vehicle
towed for service. SeeTowing Your Vehicle on
page 5-26.
{CAUTION:
The brake system might not be working properly if
the brake system warning light is on. Driving with
the brake system warning light on can lead to a
crash. If the light is still on after the vehicle has
been pulled off the road and carefully stopped,
have the vehicle towed for service. United States
Canada
3-47

Antilock Brake System (ABS)
Warning Light
For vehicles with the
Antilock Brake System
(ABS), this light comes on
briey when the engine
is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light then goes off.
If the ABS light stays on, turn the ignition off. If the light
comes on while driving, stop as soon as it is safely
possible and turn the ignition off. Then start the engine
again to reset the system. If the ABS light stays on,
or comes on again while driving, the vehicle needs
service. If the regular brake system warning light is not
on, the vehicle still has brakes, but not antilock brakes.
If the regular brake system warning light is also on,
the vehicle does not have antilock brakes and there is a
problem with the regular brakes. SeeBrake System
Warning Light on page 3-47.
For vehicles with a Driver Information Center (DIC),
seeDIC Warnings and Messages on page 3-60for all
brake related DIC messages.
StabiliTrak®/Traction Control
System (TCS) Warning Light
The Traction Control
System (TCS)/StabiliTrak
system warning light
comes on briey as the
engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator lights go off.
If the light stays on, or comes on while driving and
the DIC shows a SERVICE TRACTION SYS or
a SERVICE STABILITRAK message, there is a
problem with the Traction Control System (TCS)
or the StabiliTrak
®system and the vehicle needs
service.
3-48

Tire Pressure Light
For vehicles with the tire
pressure light, it comes on
briey when the engine
is started. If it does not,
have the vehicle serviced
by your dealer/retailer.
If the system is working
normally the indicator light
then goes off.
This light also comes on when one or more of the tires
is signicantly underinated.
A tire pressure message in the Driver Information
Center (DIC) can accompany the light. SeeDIC
Warnings and Messages on page 3-60for more
information.
Stop and check the tires as soon as it is safe to do so.
If underinated, inate the tire to the proper pressure.
SeeTires on page 6-46for more information.
If a problem is detected with the Tire Pressure Monitor
System, this light ashes for approximately 60 seconds
and then stays on for the remainder of the ignition
cycle. SeeTire Pressure Monitor System on page 6-55
for more information.
Malfunction Indicator Lamp
Check Engine Light
A computer system called OBD II (On-Board
Diagnostics-Second Generation) monitors operation of
the fuel, ignition, and emission control systems. It makes
sure that emissions are at acceptable levels for the
life of the vehicle, helping to produce a cleaner
environment.
This comes on briey
while starting the engine.
If it does not come on,
have the vehicle serviced
by your dealer/retailer.
If the check engine light comes on and stays on, while
the engine is running, this indicates that there is an
OBD II problem and service is required.
3-50

Malfunctions often are indicated by the system before
any problem is apparent. Being aware of the light
can prevent more serious damage to the vehicle.
This system assists the service technician in correctly
diagnosing any malfunction.
Notice:If the vehicle is continually driven with this
light on, after a while, the emission controls
might not work as well, the vehicle’s fuel economy
might not be as good, and the engine might not
run as smoothly. This could lead to costly repairs
that might not be covered by the vehicle warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system
of the vehicle or the replacement of the original
tires with other than those of the same Tire
Performance Criteria (TPC) can affect the vehicle’s
emission controls and can cause this light to come
on. Modications to these systems could lead to
costly repairs not covered by the vehicle warranty.
This could also result in a failure to pass a required
Emission Inspection/Maintenance test. See
Accessories and Modifications on page 6-3.This light comes on during a malfunction in one of
two ways:
Light Flashing:A misre condition has been detected.
A misre increases vehicle emissions and could
damage the emission control system on the vehicle.
Diagnosis and service might be required.
The following can prevent more serious damage to
the vehicle:
Reduce vehicle speed.
Avoid hard accelerations.
Avoid steep uphill grades.
If the light continues to ash, when it is safe to do so,
stop the vehicle. Find a safe place to park the vehicle.
Turn the key off, wait at least 10 seconds, and restart
the engine. If the light is still ashing, follow the previous
steps and see your dealer/retailer for service as soon
as possible.
3-51

Light On Steady:An emission control system
malfunction has been detected on the vehicle.
Diagnosis and service might be required.
An emission system malfunction might be corrected by
doing the following:
Make sure the fuel cap is fully installed. SeeFilling
the Tank on page 6-8. The diagnostic system can
determine if the fuel cap has been left off or
improperly installed. A loose or missing fuel cap
allows fuel to evaporate into the atmosphere.
A few driving trips with the cap properly installed
should turn the light off.
If the vehicle has been driven through a deep
puddle of water, the vehicle’s electrical system
might be wet. The condition is usually corrected
when the electrical system dries out. A few driving
trips should turn the light off.
Make sure to fuel the vehicle with quality fuel.
Poor fuel quality causes the engine not to run
as efficiently as designed and may cause:
stalling after start-up, stalling when the vehicle
is changed into gear, misring, hesitation on
acceleration, or stumbling on acceleration.
These conditions might go away once the engine is
warmed up.
If one or more of these conditions occurs, change
the fuel brand used. It will require at least one
full tank of the proper fuel to turn the light off.
SeeGasoline Octane on page 6-5.
If none of the above have made the light turn off, your
dealer/retailer can check the vehicle. The dealer/retailer
has the proper test equipment and diagnostic tools to
x any mechanical or electrical problems that might have
developed.
3-52

Engine Oil Pressure Gage
The engine oil pressure gage shows the engine
oil pressure in psi (pounds per square inch) or
kPa (kilopascals) when the engine is running.
Oil pressure should be 20 to 80 psi (140 to 550 kPa).
In certain situations such as long, extended idles on hot
days, it could read as low as 6 psi (40 kPa) and still
be considered normal. It may vary with engine speed,outside temperature and oil viscosity. The Driver
Information Center (DIC) may display messages
regarding the oil condition. SeeDIC Warnings and
Messages on page 3-60andEngine Oil on page 6-15.
{CAUTION:
Do not keep driving if the oil pressure is low.
The engine can become so hot that it catches re.
Someone could be burned. Check the oil as soon
as possible and have the vehicle serviced.
Notice:Lack of proper engine oil maintenance can
damage the engine. The repairs would not be
covered by the vehicle warranty. Always follow the
maintenance schedule in this manual for changing
engine oil. United States
Canada
3-54

CHANGE OIL NOW
This message displays when the life of the engine oil
has expired. SeeScheduled Maintenance on page 7-4.
After an oil change, the Oil Life Indicator must be
reset. SeeOil Life Indicator on page 3-76andEngine
Oil Life System on page 6-18.
CHARGE SYSTEM FAULT
This message displays when a problem with the
charging system has been detected. Have the vehicle
serviced by your dealer/retailer.
CHECK GAS CAP
This message displays if the fuel cap has not been fully
tightened. Check the fuel cap to make sure that it is
on properly.
CLEAN RADAR CRUISE
If the vehicle has this feature, this message displays
when the Adaptive Cruise Control (ACC) system
is disabled because the radar is blocked and cannot
detect vehicles in your path. It may also activate during
heavy rain or due to road spray. To clean the system,
seeAdaptive Cruise Control on page 3-14.
CLOSE CARGO DIVIDER
This message displays if the cargo divider is not in
place. Open the trunk and make sure the cargo divider
is secure and no objects are on the divider. SeeRear
Storage Area on page 2-54for more information.
COOLANT OVER TEMP (Temperature)
This message displays when the engine coolant
temperature is too hot. Stop and allow the vehicle to
idle in P (Park) until it cools down and the message is
removed. Do not increase engine speed above a
normal idle. If it does not cool down, turn off the engine
and have the vehicle serviced by your dealer/retailer
before driving it again. Severe engine damage can result
from an overheated engine. SeeEngine Overheating
on page 6-27.
CRUISE NOT READY
This message indicates that the Adaptive Cruise Control
(ACC) will not activate due to a temporary condition.
The vehicle does not require service. If this message
displays when you attempt to activate the system,
continue driving for several minutes, then try to activate
the system again.
3-61

HOT ENGINE–A/C OFF
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
You can continue to drive the vehicle. If this message
continues to display, have the system repaired by
your dealer/retailer as soon as possible to avoid
compressor damage.
ICE POSSIBLE
This message displays when the outside air temperature
is cold enough to create icy road conditions. Adjust your
driving accordingly.
LEFT DOOR AJAR
This message displays anytime the engine is running,
the transmission is not in P (Park), and the driver door
is open or ajar. A chime sounds when the vehicle’s
speed is greater than 3 mph (5 km/h).
LOW BRAKE FLUID
This message displays if the engine is running to inform
the driver that the brake uid level is low. Have the
brake system serviced by your dealer/retailer as soon
as possible. See “Brake Fluid” underBrakes on
page 6-32.
LOW COOLANT
This message displays when there is a low level of
engine coolant. Have the cooling system serviced by
your dealer/retailer as soon as possible. SeeEngine
Coolant on page 6-23.
LOW FUEL
This message displays when the fuel supply is less
than 5 gallons (18.9 L) and the display is turned off.
A single chime also sounds when this message is
displayed.
LOW OIL LEVEL
For correct operation of the low oil sensing system,
the vehicle should be on a level surface. A false LOW
OIL LEVEL message may display if the vehicle is parked
on a grade. The oil level sensing system does not
check for actual oil level if the engine has been off for a
short period of time, and the oil level is never checked
while the engine is running. If the LOW OIL LEVEL
message displays, and the vehicle has been parked on
level ground with the engine off for at least 30 minutes,
the oil level should be checked by observing the oil
dipstick. Prior to checking the oil level, make sure the
engine has been off for a few minutes and the vehicle is
on a level surface. Then check the dipstick and add
oil if necessary. SeeEngine Oil on page 6-15.
3-63