Engine CADILLAC XLR 2006 1.G Service Manual

Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which monitors
operation of the fuel,
ignition, and emission
control systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for
the life of the vehicle, helping to produce a cleaner
environment. The Check Engine light comes on
to indicate that there is a problem and service is
required. Malfunctions often will be indicated by the
system before any problem is apparent. This may
prevent more serious damage to your vehicle.
This system is also designed to assist your service
technician in correctly diagnosing any malfunction.
Notice:If you keep driving your vehicle with this
light on, after awhile, your emission controls may not
work as well, your fuel economy may not be as good,
and your engine may not run as smoothly. This could
lead to costly repairs that may not be covered by
your warranty.Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system of
your vehicle or the replacement of the original tires
with other than those of the same Tire Performance
Criteria (TPC) can affect your vehicle’s emission
controls and may cause this light to come on.
Modications to these systems could lead to costly
repairs not covered by your warranty. This may
also result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 6-3.
This light should come on briey, as a check to show
you it is working, as you start the engine. If the light
does not come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission control
system on your vehicle. Diagnosis and service may
be required.
Light On Steady— An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service may be required.
3-58

If the Light Is Flashing
The following may prevent more serious damage
to your vehicle:
Reducing vehicle speed
Avoiding hard accelerations
Avoiding steep uphill grades
If the light stops ashing and remains on steady,
see “If the Light Is On Steady” following.
If the light continues to ash, when it is safe to do so,
stop the vehicle. Find a safe place to park your vehicle.
Turn the engine off, wait at least 10 seconds and
restart the engine. If the light remains on steady, see
“If the Light Is On Steady” following. If the light is
still ashing, follow the previous steps, and see your
dealer for service as soon as possible.
If the Light Is On Steady
You also may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully
install the cap. SeeFilling the Tank on page 6-7.
The diagnostic system can determine if the fuel cap
has been left off or improperly installed.A loose or missing fuel cap will allow fuel to evaporate
into the atmosphere. A few driving trips with the cap
properly installed should turn the light off.
Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane on page 6-5. Poor fuel quality will
cause your engine not to run as efficiently as designed.
You may notice this as stalling after start-up, stalling
when you put the vehicle into gear, misring, hesitation
on acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is warmed up.)
This will be detected by the system and cause the
light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least
one full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn off,
your dealer can check the vehicle. Your dealer has
the proper test equipment and diagnostic tools to x
any mechanical or electrical problems that may
have developed.
3-59

Emissions Inspection and
Maintenance Programs
Some state/provincial and local governments have or
may begin programs to inspect the emission control
equipment on your vehicle. Failure to pass this
inspection could prevent you from getting a vehicle
registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
Check Engine light is on or not working properly.
To perform a Check Engine light bulb check with the
keyless ignition, make sure the transmitter fob is in
the passenger compartment. SeeIgnition Positions
on page 2-21. Press the bottom of the ACC button
on the instrument panel and hold the button down
for ve seconds. The instrument panel, including
the Check Engine light, will light up and the ignitionwill be on, but the engine will not start — if you press
the bottom of the ACC button only briey, less than
ve seconds, the accessory power mode will be turned
on, but not the ignition. After the bulb check, be sure
to press and release the ACC button again to turn
the ignition off and avoid draining the vehicle’s battery.
Your vehicle will not pass this inspection if the
OBD (on-board diagnostic) system determines that
critical emission control systems have not been
completely diagnosed by the system. The vehicle
would be considered not ready for inspection. This can
happen if you have recently replaced your battery or
if your battery has run down. The diagnostic system is
designed to evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and your vehicle
still does not pass the inspection for lack of OBD
system readiness, your GM dealer can prepare the
vehicle for inspection.
3-60

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 3-67andEngine
Oil on page 6-15.
{CAUTION:
Do not keep driving if the oil pressure is low.
If you do, your engine can become so hot that
it catches re. You or others could be burned.
Check your oil as soon as possible and have
your vehicle serviced.
Notice:Lack of proper engine oil maintenance
may damage the engine. The repairs would not
be covered by your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil. United States
Canada
3-61

AVERAGE SPEED:This feature shows the average
speed the vehicle has traveled since the last time
the value was reset. To reset the value, press the
information button to display AVERAGE SPEED, then
press and hold the RESET button until AVERAGE
SPEED 00.0 is displayed.
ELAPSED TIME:This feature is like a stopwatch, in
that you can clock the time it takes to get from one point
to another.
To operate, press the information button to display
ELAPSED TIME. Each of the elds for the hours,
minutes, and seconds are two numeric digits.
Once ELAPSED TIME 00:00:00 is displayed, press the
RESET button to start the timing feature. Press the
RESET button again to stop it. If you will be starting and
stopping your vehicle, during a trip for instance, the
ELAPSED TIME feature will automatically start timing
where it left off when you last stopped. To reset it, press
and hold the RESET button until the display reads
ELAPSED TIME 00:00:00. Press the information button
to exit from the ELAPSED TIME display.FRONT Lxx Rxx PSI:This feature shows the tire
pressure for the front left and right tires.
REAR Lxx Rxx PSI:This feature shows the tire
pressure for the rear left and right tires.
OIL LIFE:This feature shows the estimated oil life
remaining. SeeOil Life Indicator on page 3-82for more
information. To reset the engine oil life system, see
Engine Oil Life System on page 6-18. This only needs
to be reset after you have had the oil changed.
In addition to the engine oil life system monitoring oil
life, additional maintenance is recommended in the
Maintenance Schedule in this manual. SeeScheduled
Maintenance on page 7-4andEngine Oil on page 6-15
for more information.
ENG/METRIC (English/Metric):This feature allows
you to switch the DIC displays between English
and Metric. Press the RESET button to switch the
display between English and Metric. There will be an
arrow next to the option that is selected.
3-66

BUCKLE SEAT BELT:This message reminds you to
buckle the driver’s seat belt.
This message will display and a chime will sound when
the ignition is on, the driver’s seat belt is unbuckled,
and the vehicle is in motion. You should buckle
your seat belt.
If the driver remains unbuckled when the ignition is on
and the vehicle is in motion, the reminder will be
repeated. If the driver’s seat belt is already buckled,
this message and chime will not come on.
This message is an additional reminder to the Safety
Belt Reminder Light in the instrument panel cluster.
SeeSafety Belt Reminder Light on page 3-50for more
information.
CHANGE OIL NOW:This means that 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 3-82and
Engine Oil Life System on page 6-18.
CHARGE SYSTEM FAULT:This message will display
when a problem with the charging system has been
detected. Have your vehicle serviced by your GM dealer.CHECK GAS CAP:This message will appear if the gas
cap has not been fully tightened. You should recheck
your gas cap to ensure that it is on properly.
CLEAN RADAR CRUISE:If your vehicle has this
feature, this message indicates 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 3-15.
CLOSE CARGO DIVIDER:This message indicates that
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 2-46
for more information.
COOLANT OVER TEMP (Temperature):This message
will appear when the engine coolant temperature is
too hot. Stop and allow your vehicle to idle in PARK (P)
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 it serviced
by your GM dealer before driving it again. Severe
engine damage can result from an overheated engine.
SeeEngine Overheating on page 6-25.
3-68

CRUISE NOT READY:This message indicates that
ACC will not activate due to a temporary condition.
Your vehicle does not require service. If this message
appears when you attempt to activate the system,
continue driving for several minutes then try again to
activate the system.
DRIVER NO. X (1 OR 2):This message will be
displayed when the vehicle is started or when there
is a change of driver. The message will show which
driver is activating the personalization feature. It will
only stay on for ve seconds.
ENGINE HOT, STOP ENGINE:This message will
appear when the engine has overheated. Stop and
turn the engine off immediately to avoid severe engine
damage. SeeEngine Overheating on page 6-25.
A multiple chime will also sound when this message
is displayed.
ENGINE PROTECTION REDUCE ENGINE RPM:
If this message appears, the control system has
determined that continued operation at the existing
engine speed may lead to engine overheating.
Therefore, you should lower the engine speed by
upshifting the transmission or drive at a lower speed.HEADLAMPS SUGGESTED:If it is dark enough
outside and the headlamps and Twilight Sentinel®
controls are off, this message will display on the DIC.
This message informs the driver that turning on the
exterior lamps is recommended. It has become
dark enough outside to require the headlamps and/or
other exterior lamps. This message will also appear
if the optional Rainsense™ wiping feature is on and
the Twilight Sentinel
®is off.
HIGH TRANS (Transmission) TEMP (Temperature):
This message indicates that the transmission uid in
your vehicle is too hot. Stop and allow your vehicle to idle
until it cools down or until this message is removed.
HIGH VOLTAGE:This message shows that the
electrical charging system is overcharging. To avoid
being stranded, have the electrical system checked
by your GM dealer. You can reduce the charging
overload by using the accessories. Turn on the lamps
and radio, set the climate control on AUTO and the
fan speed on HI, and turn the rear window defogger
on. You can monitor battery voltage on the DIC
by pressing the information button. The normal range
is 11.5 to 15.5 volts when the engine is running.
3-69

HOT ENGINE–A/C OFF:This message displays when
the engine coolant becomes hotter than the normal
operating temperature. To avoid added strain on a hot
engine, the air conditioning compressor is automatically
turned off. When the coolant temperature returns to
normal, the A/C operation will automatically resume.
You can continue to drive your vehicle. If this message
continues to appear, have the system repaired by
your GM dealer as soon as possible to avoid
compressor damage.
ICE POSSIBLE:This message appears when the
outside air temperature is cold enough to create icy
road conditions.
LEFT DOOR AJAR:This message will display anytime
the vehicle engine is running, the transmission is not
in PARK (P) and the driver’s door is open or ajar.
A chime will sound when the vehicle’s speed is greater
than 3 mph (4.8 km/h).
LOW BRAKE FLUID:This message will display if the
vehicle is running to inform the driver that the brake
uid level is low. Have the brake system serviced
by your GM dealer as soon as possible. See “Brake
Fluid” underBrakes on page 6-35.LOW COOLANT:This message will appear when there
is a low level of engine coolant. Have the cooling
system serviced by your GM dealer as soon as possible.
SeeEngine Coolant on page 6-22.
LOW FUEL:This message will appear when the fuel
supply is less than 5 gallons (18.9 L) and the display is
turned off. A single chime will also sound when this
message is displayed.
LOW OIL LEVEL:For correct operation of the low oil
sensing system, your vehicle should be on a level
surface. A false LOW OIL LEVEL message may appear
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 appears,
and your 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, be sure the engine has been
off for a few minutes and your vehicle is on a level
surface. Then check the dipstick and add oil if
necessary. SeeEngine Oil on page 6-15.
3-70

LOW OIL PRESSURE:If this message appears while
the engine is running, stop the engine and do not
operate it until the cause of low oil pressure is corrected.
Severe damage to the engine can result. A multiple
chime will sound when this message is displayed.
LOW VOLTAGE:This message will appear when the
electrical system is charging less than 10 volts or if the
battery has been drained. If this message appears
immediately after starting, it is possible that the generator
can still recharge the battery. The battery should
recharge while driving but may take a few hours to do so.
Consider using an auxiliary charger to boost the battery
after returning home or to a nal destination. Be sure to
follow the manufacturer’s instructions. If this message
appears while driving or after starting your vehicle and
stays on, have it checked immediately by your GM dealer
to determine the cause of this problem.To help the generator recharge the battery quickly,
you can reduce the load on the electrical system by
turning off the accessories. You can monitor battery
voltage on the DIC by pressing the INFO button.
The normal range is 11.5 to 15.5 volts.
LOW WASHER FLUID:This message means that your
vehicle is low on windshield washer uid. SeeWindshield
Washer Fluid on page 6-34.
MAX (Maximum) SPEED XX MPH (XX KM/H):
A failure in the magnetic ride control system has
occurred when this message appears. The Powertrain
Control Module (PCM) determines the speed to
which your vehicle is limited. Have your vehicle
serviced by your GM dealer if this message appears.
3-71

NO FOB, OFF OR RUN?:When this message displays,
it means that the keyless access transmitter is not
detected inside the vehicle while you are trying to turn
the ignition off. Your vehicle may be near a strong
radio antenna signal causing the keyless access system
to be jammed. The vehicle will remain in ACC until off
or START has been pressed or ve minutes has
expired. If you turn the ignition off and you cannot nd
the keyless access transmitter, you will not be able
to restart the vehicle. The keyless access transmitter
needs to be inside of the vehicle in order for the vehicle
to start. SeeStarting the Engine on page 2-22for
more information.
OVER SPEED WARNING:This message is displayed
when the vehicle speed exceeds a certain limit as
required by some export countries. A chime will sound
when this message is displayed.
PRESS BRAKE TO START:The brake pedal must
be applied to start the vehicle. Make sure you are
pressing the brake pedal all the way down.
REDUCED ENGINE POWER:This message informs
you that the vehicle is reducing engine power because
the transmission is being placed in gear under conditions
that may cause damage to the vehicle’s engine,
transmission, or ability to accelerate. Reduced engine
power can affect the vehicle’s ability to accelerate. If this
message is on, but there is no reduction in performance,
proceed to your destination.The performance may be reduced the next time the
vehicle is driven. The vehicle may be driven at a reduced
speed while this message is on, but acceleration and
speed may be reduced. Anytime this message stays on,
the vehicle should be taken to your GM dealer for service
as soon as possible.
RIGHT DOOR AJAR:The passenger’s door is open or
ajar when this message appears. The vehicle must
be running and the transmission not in PARK (P) for this
message to display. A chime will sound if the vehicle’s
speed is greater than 3 mph (5 km/h).
SERVICE A/C:This message appears when the
electronic sensors that control the air conditioning and
heating systems are no longer working. Have the climate
control system serviced by your GM dealer if you
notice a drop in heating and air conditioning efficiency.
SERVICE ABS (Anti-Lock Brake System):If the
SERVICE ABS message is displayed when you
are driving, stop as soon as possible and turn the
ignition off. Then start the engine again to reset the
system. If the message stays on, or comes back
on again while you are driving, your vehicle is in need
of service. See your GM dealer.
If the SERVICE ABS message is being displayed, your
Traction Control System and StabiliTrak
®System
will also be disabled.
3-73