ignition CHEVROLET IMPALA 2007 9.G Service Manual

When the ignition is on, the brake system warning
light will also come on when you set your
parking brake. The light will stay on if your parking
brake does not release fully. If it stays on after
your parking brake is fully released, it means you
have a brake problem.
If the light comes on while you are driving, pull
off the road and stop carefully. You may notice that
the pedal is harder to push, or the pedal may go
closer to the oor. It may take longer to stop.
If the light is still on, have the vehicle towed for
service. SeeTowing Your Vehicle on page 282.
{CAUTION:
Your brake system may not be working
properly if the brake system warning light
is on. Driving with the brake system
warning light on can lead to an accident.
If the light is still on after you have pulled
off the road and stopped carefully, have
the vehicle towed for service.
Anti-Lock Brake System
Warning Light
Your vehicle may have
an Anti-Lock Brake
System (ABS)
warning light.
It should come on for a few seconds when you
turn the ignition key to RUN.
If the ABS warning light stays on longer than
normal after you have started your engine, turn
the ignition off or, if the light comes on and stays
on 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 light
still stays on, or comes on again while you are
driving, the ABS needs service and you do
not have anti-lock brakes.
The ABS warning light should come on briey when
you turn the ignition key to RUN. This is normal. If
the light does not come on then, have it xed so it
will be ready to warn you if there is a problem.
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Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the gage pointer moves towards the “H”
(United States) or the shaded in thermostat
(Canada), it means that your engine coolant has
overheated. If you have been operating your
vehicle under normal driving conditions, you should
pull off the road, stop your vehicle and turn off
the engine as soon as possible.
SeeEngine Overheating on page 323for more
information.
Tire Pressure Light
This light comes on
briey when you turn
the ignition to RUN.
This light will also come on when one or more of
your tires are signicantly underinated.
A CHECK TIRE PRESSURE message in the
Driver Information Center (DIC) will accompany
the light. SeeDIC Warnings and Messages
on page 199for more information.
Stop and check your tires as soon as it is safe to
do so. If underinated, inate to the proper
pressure. SeeTires on page 351for more
information.
United StatesCanada
184

This light will ash for approximately 60 seconds
and then stay on if a problem is detected with
the Tire Pressure Monitor system.
SeeTire Pressure Monitor System on page 360
for more information.
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 beindicated 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, the emission controls
might not work as well, your 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
your warranty.
Notice:Modications made to the engine,
transaxle, 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 296.
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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 302.
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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Fuel Gage
When the ignition is on, the fuel gage tells you
about how much fuel you have remaining.
Here are four things that some owners ask about.
None of these show a problem with your fuel gage:
At the gas station, the gas pump shuts off
before the gage reads full.
It takes a little more or less fuel to ll up than
the gage indicated. For example, the gage may
have indicated the tank was half full, but it
actually took a little more or less than half the
tank’s capacity to ll the tank.
The gage moves a little when you turn a corner
or speed up.
The gage doesn’t go back to empty when you
turn off the ignition.
Driver Information Center (DIC)
Your vehicle has a Driver Information Center (DIC).
All messages will appear in the DIC display
located below the speedometer in the instrument
panel cluster. The DIC buttons are located on
the instrument panel, to the right of the instrument
panel cluster.
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 DIC displays trip, fuel, and vehicle system
information, and warning messages if a system
problem is detected. The bottom line of the
DIC shows the shift lever position indicator. See
Automatic Transaxle Operation on page 116
for more information.
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190

U(Customization):Press this button to
customize the feature settings on your vehicle.
SeeDIC Vehicle Customization on page 208
for more information.
V(Set/Reset):Press this button to set or reset
certain functions and to turn off or acknowledge
messages on the DIC.
Trip/Fuel Menu Items
3
(Trip/Fuel):Press this button to scroll
through the following menu items:
Odometer
Press the trip/fuel button until ODOMETER
displays. This display shows the distance the
vehicle has been driven in either miles (mi)
or kilometers (km).
Trip A and Trip B
Press the trip/fuel button until TRIP A or TRIP B
displays. This display shows the current distance
traveled in either miles (mi) or kilometers (km)
since the last reset for each trip odometer. Both
trip odometers can be used at the same time.Each trip odometer can be reset to zero separately
by pressing the set/reset button while the desired
trip odometer is displayed.
The trip odometer has a feature called the
retro-active reset. This can be used to set the trip
odometer to the number of miles (kilometers)
driven since the ignition was last turned on. This
can be used if the trip odometer is not reset at the
beginning of the trip.
To use the retro-active reset feature, press and hold
the set/reset button for at least four seconds. The
trip odometer will display the number of miles (mi)
or kilometers (km) driven since the ignition was last
turned on and the vehicle was moving. Once the
vehicle begins moving, the trip odometer will
accumulate mileage. For example, if the vehicle
was driven 5 miles (8 km) before it is started again,
and then the retro-active reset feature is activated,
the display will show 5 miles (8 km). As the vehicle
begins moving, the display will then increase to
5.1 miles (8.2 km), 5.2 miles (8.4 km), etc.
If the retro-active reset feature is activated after
the vehicle is started, but before it begins moving,
the display will show the number of miles (mi)
or kilometers (km) that were driven during the last
ignition cycle.
192

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.
SERVICE TRACTION CONTROL
If your vehicle has the Traction Control System
(TCS), this message displays when the system is
not functioning properly. A warning light also
appears on the instrument panel cluster. See
Traction Control System (TCS) Warning Light on
page 183. SeeTraction Control System (TCS) on
page 256for more information. Have the TCS
serviced by your dealer as soon as possible.
SERVICE TRANSMISSION
This message displays when there is a problem
with the transaxle. See your dealer for service.
SERVICE VEHICLE SOON
This message displays when a non-emissions
related malfunction occurs. Have the vehicle
serviced by your dealer as soon as possible.
STARTING DISABLED SERVICE
THROTTLE
This message displays if the starting of the engine
is disabled due to the electronic throttle control
system. Have your vehicle serviced by your dealer
immediately.
This message only appears while the ignition is in
RUN, and will not disappear until the problem
is resolved.
This message cannot be acknowledged.
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 107for more information.
206

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 302for 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 360. The tire positions must be re-learned
after rotating the tires or after replacing a tire
or sensor. SeeTire Inspection and Rotation on
page 364andInation - Tire Pressure on page 359
for more information.
TRACTION CONTROL OFF
If your vehicle has the Traction Control System
(TCS), this message displays when the TCS turns
off. SeeTraction Control System (TCS) on
page 256for more information.
This message only displays while the ignition is in
RUN and disappears after 10 seconds, unless
it is acknowledged or an urgent warning appears.Any of the following conditions may cause the
TCS to turn off:
The TCS is turned off by pressing the traction
control button. SeeTraction Control System
(TCS) on page 256for more information.
The battery is low.
There is a TCS failure. See your dealer for
service.
TRACTION CONTROL ON
If your vehicle has the Traction Control System
(TCS), this message displays when the TCS
is turned on. SeeTraction Control System (TCS)
on page 256for 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.
207

TRUNK OPEN
This message displays when the trunk is not
closed completely. Make sure that the trunk is
closed completely. SeeTrunk on page 102.
TURN SIGNAL ON
This message displays as a reminder to turn off
the turn signal if you drive your vehicle for
more than about 0.75 mile (1.2 km) with a turn
signal on. SeeTurn Signal/Multifunction Lever on
page 153.
This message displays and a chime sounds only
when the ignition is in RUN. The message will
not disappear until the turn signal is manually
turned off, or a turn is completed.
WASHER FLUID LOW ADD FLUID
This message displays when the windshield
washer uid is low. Fill the windshield washer
reservoir as soon as possible. SeeEngine
Compartment Overview on page 306for the
location of the windshield washer reservoir. Also,
seeWindshield Washer Fluid on page 333for
more information.
DIC Vehicle Customization
Your vehicle has customization capabilities
that allow you to program certain features to
one preferred setting. Customization features
can only be programmed to one setting on
the vehicle and cannot be programmed to a
preferred setting for two different drivers.
All of the customization options may not be
available on your vehicle. Only the options
available will be displayed on your DIC.
The default settings for the customization features
were set when your vehicle left the factory, but
may have been changed from their default
state since then.
The customization preferences are automatically
recalled.
To change customization preferences, use the
following procedure.
208

Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle in
PARK (P).
To avoid excessive drain on the battery, it is
recommended that the headlamps are
turned off.
2. Press the customization button to enter the
feature settings menu.
If the menu is not available, FEATURE
SETTINGS AVAILABLE IN PARK will display.
Before entering the menu, make sure the
vehicle is in PARK (P).
Feature Settings Menu Items
The following are customization features that allow
you to program settings to the vehicle:
DISPLAY IN ENGLISH
This feature will only display if a language other
than English has been set. This feature allows you
to change the language in which the DIC
messages appear to English.Press the customization button until the
PRESS
VTO DISPLAY IN ENGLISH screen
appears on the DIC display. Press the set/reset
button to display all DIC messages in English.
DISPLAY LANGUAGE
This feature allows you to select the language in
which the DIC messages will appear.
Press the customization button until the DISPLAY
LANGUAGE screen appears on the DIC display.
Press the set/reset button to access the settings
for this feature. Then press the customization
button to scroll through the following choices:
ENGLISH (default):All messages will appear in
English.
FRANCAIS:All messages will appear in French.
ESPANOL:All messages will appear in
Spanish.
NO CHANGE:No change will be made to this
feature. The current setting will remain.
Select one of the available choices and press the
set/reset button while it is displayed on the
DIC to select it.
209