2007 CADILLAC DTS PROFESSIONAL fuel

This light should come on, as a check to show
you it is working, when the ignition is on and
the engine is not running. 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.
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 you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possibleIf 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 key 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 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 358.
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.
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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.
SeeGasoline Octane on page 356. 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.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 in order
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.
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 dealer can prepare the vehicle for inspection.
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Fuel Gage
The fuel gage shows
approximately how
much fuel is in the tank.
It works only when
the engine is on.
If the fuel supply gets low, the FUEL LEVEL LOW
message will appear in the Driver Information
Center and a single chime will sound. SeeDIC
Warnings and Messages on page 246for more
information.Here are a few concerns some owners have had
about the fuel gage. All of these situations are
normal and do not indicate that anything is wrong
with the fuel gage:
At the gas station the gas pump shuts off
before the gage reads full.
The gage may change when you turn, stop
quickly or accelerate quickly.
It takes a little more or less fuel to ll the
tank than the gage indicated. For example, the
gage may have indicated that the tank was
half full, but it actually took a little more or less
than half the tank’s capacity to ll the tank.
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Driver Information Center (DIC)
The Driver Information Center (DIC) gives you the
status of many of your vehicle’s systems. The DIC
is also used to display warning/status messages.
All messages will appear in the DIC display located
at the bottom of the instrument panel cluster, below
the tachometer and speedometer. The DIC buttons
are located on the instrument panel, to the left of
the steering wheel.
The DIC comes on when the ignition is on. After
a short delay, the DIC will display the information
that was last displayed before the engine was
turned off.
The top line of the DIC display shows the vehicle
system information and the warning/status
messages. The bottom line of the DIC display
shows the odometer on the left side. The bottom
line of the DIC display also shows a digital
speedometer on the right side.
If a problem is detected, a warning message
will appear on the display. Be sure to take any
message that appears on the display seriously
and remember that clearing the message will only
make the message disappear, not correct the
problem.
DIC Controls and Displays
The Driver Information
Center (DIC) has
different displays
which can be accessed
by pressing the DIC
buttons located on the
instrument panel, to the
left of the steering wheel.
3Trip/Fuel:Press this button to scroll through
the trip and fuel displays. See “Trip/Fuel Display
Menu Items” following for more information
on these displays.
TVehicle Information:Press this button to
scroll through the vehicle information displays.
See “Vehicle Information Display Menu Items”
following for more information on these displays.
UCustomization:Press this button to scroll
through each of the customization features.
SeeDIC Vehicle Customization on page 259for
more information on the customization features.
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VSet/Reset:Press this button to reset certain
DIC features and to acknowledge DIC warning
messages and clear them from the DIC display.
yzMenu Up/Down:Press this button to scroll
up and down the menu items.
Trip/Fuel Display Menu Items
3
(Trip/Fuel):The following display menu
items can be displayed by pressing the trip/fuel
button:
TRIP A or TRIP B
These displays show the current distance traveled
since the last reset for each trip odometer in either
miles (mi) or kilometers (km). Both odometers can
be used at the same time. Each trip odometer can
be reset to zero separately by pressing and holding
the set/reset button for a few seconds while the
desired trip odometer is displayed.
FUEL RANGE
This display shows the approximate number
of remaining miles (mi) or kilometers (km) you can
drive without relling the fuel tank. This estimate
is based on the current driving conditions and
will change if the driving conditions change.
For example, if you are driving in traffic and
making frequent stops, the display may read
one number, but if you enter the freeway,
the number may change even though you still
have the same amount of fuel in the fuel tank.
This is because different driving conditions
produce different fuel economies. Generally,
freeway driving produces better fuel economy
than city driving.
Once the range drops below an estimated
40 miles (64 km) remaining, the display will
show FUEL RANGE LOW.
If your vehicle is low on fuel, the FUEL LEVEL
LOW message will be displayed. See “FUEL
LEVEL LOW” underDIC Warnings and Messages
on page 246for more information.
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AVERAGE ECONOMY (AFE)
This display shows the approximate average miles
per gallon (mpg) or liters per 100 kilometers
(L/100 km). This number is calculated based on
the number of mpg (L/100 km) recorded since
the last time this display was reset. To reset this
display, press the set/reset button. The display will
return to zero.
INST (Instantaneous) ECONOMY (IFE)
This display shows the current fuel economy
in either miles per gallon (mpg) or liters per
100 kilometers (L/100 km). This number reects
only the fuel economy that the vehicle has right now
and will change frequently as driving conditions
change. Unlike average economy, this display
cannot be reset.
FUEL USED
This display shows the number of gallons (gal) or
liters (L) of fuel used since the last reset of this
display. To reset this display, press the set/reset
button. The display will return to zero.
TIMER ON/OFF
This display can be used like a stopwatch. You can
record the time it takes to travel from one point to
another. To access the timer, press the trip/fuel
button until 00:00:00 TIMER OFF displays.
To turn on the timer, press the set/reset button
until TIMER ON displays. The timer will then start.
To turn off the timer, press the set/reset button
again until TIMER OFF displays. The timer
will stop and display the end timing value.
To reset the timer, press and hold the set/reset
button after the timer has been stopped.
The display will return to zero.
AVERAGE SPEED
This display shows the average speed of the
vehicle in either miles per hour (mph) or kilometers
per hour (km/h). This average is calculated based
on the various vehicle speeds recorded since the
last reset of this display. To reset this display, press
the set/reset button. The display will return to zero.
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DIC Warnings and Messages
These messages appear if there is a problem
detected in one of your vehicle’s systems.
You must acknowledge a message to clear it from
the screen for further use. To clear a message,
press the set/reset button.
Be sure to take any message that appears on
the screen seriously and remember that clearing
the message will only make the message
disappear, not the problem.
AUTOMATIC LIGHT CONTROL OFF
This message displays when the automatic
headlamps are turned off. SeeExterior Lamps
on page 193for more information.
AUTOMATIC LIGHT CONTROL ON
This message displays when the automatic
headlamps are turned on. SeeExterior Lamps
on page 193for more information.
BATTERY SAVER ACTIVE
This message displays when the system detects
that the battery voltage is dropping beyond a
reasonable level. The battery saver system starts
reducing certain features of the vehicle that
you may be able to notice. At the point that the
features are disabled, this message is displayed.
It means that the vehicle is trying to save the
charge in the battery.
Turn off all unnecessary accessories to allow the
battery to recharge.
The normal battery voltage range is
11.5 to 15.5 volts. You can monitor battery
voltage on the Driver Information Center (DIC)
by pressing the trip/fuel button until BATTERY
VOLTAGE is displayed.
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FOLLOWING GAP
This symbol appears with this message.
If your vehicle has Adaptive Cruise Control (ACC),
this message displays to show the follow
distance that has been set. There are six follow
distances to choose from. Each follow distance
is shown on the DIC by displaying from one to
six bars between two car symbols. SeeAdaptive
Cruise Control on page 179for more information.
FUEL LEVEL LOW
This symbol appears
with this message.
This message displays when your vehicle is low
on fuel. Rell the fuel tank as soon as possible.
A single chime sounds when this message is
displayed. SeeFilling the Tank on page 358.
HEATED WASHER FLUID SYSTEM OFF
This message displays when you manually turn
off the heated washer uid system or when
the system automatically turns off. See “Heated
Washer Fluid” underWindshield Washer on
page 175for more information.
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