2004 CHEVROLET AVEO ECU

When trying to start the vehicle, if the engine does not
start and the security light continues flashing, the
key may have a damaged transponder. Turn the ignition
off and try again.
If the engine still does not start, and the key appears
to be undamaged, try another key. At this time, you may
also want to check the fuse. SeeFuses and Circuit
Breakers on page 5-85. If the engine still does not start
with the other key, your vehicle needs service.
If your vehicle does start, the first key may be faulty.
See your dealer who can have a new key made.
Up to five keys may be programmed for the vehicle.
If you lose or damage your keys, only a GM dealer can
have new keys made.
If you are ever driving and the security light comes on
and stays on, you will be able to restart your engine
if you turn it off. The theft-deterrent system, however,
is not working properly and must be serviced by
your dealer. Your vehicle is not protected by the
theft-deterrent system at this time.
In an emergency, contact Chevrolet Roadside
Assistance. SeeRoadside Assistance Program on
page 7-6.Starting and Operating
Your Vehicle
New Vehicle Break-In
Notice:Your vehicle does not need an elaborate
“break-in.” But it will perform better in the long run
if you follow these guidelines:
Do not drive at any one speed — fast or
slow — for the rst 500 miles (805 km).
Do not make full-throttle starts.
Avoid making hard stops for the rst 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with new
linings can mean premature wear and earlier
replacement. Follow this breaking-in guideline
every time you get new brake linings.
Do not tow a trailer during break-in. SeeTowing a
Trailer on page 4-37for more information.
2-18

The main components of your instrument panel are the
following:
A. Air Outlet. SeeOutlet Adjustment on page 3-15.
B. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-18.
C. Digital Clock and Secondary Information Center.
SeeClock on page 3-25andSecondary Information
Center (SIC) on page 3-24.
D. Hazard Warning Flashers Button. SeeHazard
Warning Flashers on page 3-3.
E. Instrument Panel Brightness Control. See
“Instrument Panel Brightness” underInterior Lamps
on page 3-10.
F. Hood Release. SeeHood Release on page 5-11.
G. Horn. SeeHorn on page 3-4.
H. Audio System. SeeAudio System(s) on page 3-34.
I. Cupholder. SeeCupholder(s) on page 2-36.
J. Ashtray. SeeAshtrays and Cigarette Lighter on
page 3-12.
K. Cigarette Lighter. SeeAshtrays and Cigarette
Lighter on page 3-12.
L. Climate Control System. SeeClimate Control
System on page 3-12.
M. Glove Box. SeeGlove Box on page 2-36.Hazard Warning Flashers
Your hazard warning flashers let you warn others. They
also let police know you have a problem. Your front
and rear turn signal lamps will flash on and off.
3-3

Theft-Deterrent Feature
The theft-deterrent system is designed to discourage
theft of your radio. When the radio and vehicle are
turned off, your radio has a blinking red light to indicate
that the theft-deterrent system is activated.
The theft-deterrent system also activates when the
audio system has been disconnected from the battery.
When this occurs, the AF code and security code
will have to be entered in order to operate your radio.
An identification card stamped with the AF code
and security code will be provided with the vehicle.
Keep it in a safe place, not in the vehicle.
To enter the security code do the following:
1. Turn the ignition to ACC or ON.
2. Turn the radio on. AF or COdE will flash on the
display. If AF flashes on the display, go to Step 2.
If COdE flashes on the display, go to Step 4.
3. Enter the AF code by using the preset pushbuttons.
COdE will flash on the display.
4. Enter the security code by using the preset
pushbuttons. When the complete security code is
entered, the code will flash three times.If the security code is not entered correctly, Err will
appear on the display for a few seconds. When
COdE appears back on the display, repeat Step 4.
If the incorrect AF code is entered, an incorrect
frequency level may be chosen and the radio
reception may be affected. If this occurs, reset the
audio system by removing and re-installing the
AUDIO fuse. See “Instrument Panel Fuse Block”
underFuses and Circuit Breakers on page 5-85for
more information. Then repeat Steps 1 through 4.
Radio Reception
AM
The range for most AM stations is greater than for FM,
especially at night. The longer range, however, can
cause stations to interfere with each other. AM can pick
up noise from things like storms and power lines.
Try reducing the treble to reduce this noise.
FM
FM stereo will give you the best sound, but FM signals
will reach only about 10 to 40 miles (16 to 65 km).
Tall buildings or hills can interfere with FM signals,
causing the sound to come and go.
3-43

Winter Driving
Here are some tips for winter driving:
•Have your vehicle in good shape for winter.
•You may want to put winter emergency supplies in
your trunk.
Also seeTires on page 5-51.Include an ice scraper, a small brush or broom, a
supply of windshield washer fluid, a rag, some winter
outer clothing, a small shovel, a flashlight, a red
cloth and a couple of reflective warning triangles.
And, if you will be driving under severe conditions,
include a small bag of sand, a piece of old carpet or
a couple of burlap bags to help provide traction.
Be sure you properly secure these items in your vehicle.
4-24

And, if you do have a heavy load, you should spread it
out. Do not carry more than 110 lbs (50 kg) in your trunk.
{CAUTION:
Do not load your vehicle any heavier than the
GVWR, or either the maximum front or rear
GAWR. If you do, parts on your vehicle can
break, and it can change the way your vehicle
handles. These could cause you to lose
control and crash. Also, overloading can
shorten the life of your vehicle.
Notice:Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
If you put things inside your vehicle — like suitcases,
tools, packages, or anything else — they will go as fast
as the vehicle goes. If you have to stop or turn
quickly, or if there is a crash, they will keep going.
{CAUTION:
Things you put inside your vehicle can strike
and injure people in a sudden stop or turn, or
in a crash.
Put things in the cargo area of your
vehicle. Try to spread the weight evenly.
Never stack heavier things, like suitcases,
inside the vehicle so that some of them
are above the tops of the seats.
Do not leave an unsecured child restraint
in your vehicle.
When you carry something inside the
vehicle, secure it whenever you can.
Do not leave a seat folded down unless
you need to.
Towing a Trailer
Do not use your vehicle to tow a trailer. The vehicle is not
designed or intended for such a use. Towing a trailer can
adversely affect handling, durability and fuel economy.
4-37

Adding Coolant
If the level falls below the MIN (B) mark, add the proper
coolant mixtureat the surge tank,but only when the
engine is cool. If the surge tank is empty, a special fill
procedure is necessary. SeeCooling System on
page 5-28for instructions on “How to Add Coolant to
the Coolant Surge Tank.”
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand-tight.
Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
You will find a coolant temperature gage on your
vehicle’s instrument panel cluster. SeeEngine Coolant
Temperature Gage on page 3-21.
5-25

Sidemarker Lamps (Rear)
1. Reach into the inside of the rear bumper and locate
the rear sidemarker bulb socket.
2. Turn the socket counterclockwise.
3. Pull the socket out of the rear bumper.
4. Pull the old bulb straight out of the socket.
5. Install the new bulb by pressing it straight into
the socket.
6. Reverse Steps 1 through 3 to install the socket.
Taillamps, Turn Signal, Stoplamps
and Back-up Lamps
1. Open the trunk or liftgate.
2. Remove the two screws and the lamp assembly.
3. Remove the bulb socket by turning it
counterclockwise.
4. Remove the bulb from the socket by pressing the
bulb and turning it counterclockwise.
5. Install the appropriate bulb into the socket.
6. Replace the bulb socket into the lamp housing.
Twist the bulb socket clockwise to secure.
7.
Reverse Steps 1 through 2 to install the lamp housing.
5-49

Tire Chains
Notice:Use tire chains only where legal and only
when you must. Use only SAE Class “S” type chains
that are the proper size for your tires. Install them on
the front tires and tighten them as tightly as possible
with the ends securely fastened. Drive slowly and
follow the chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle, stop and
retighten them. If the contact continues, slow down
until it stops. Driving too fast or spinning the wheels
with chains on will damage your vehicle.
If a Tire Goes Flat
It’s unusual for a tire to “blowout” while you’re driving,
especially if you maintain your tires properly. If air goes
out of a tire, it’s much more likely to leak out slowly.
But if you should ever have a “blowout,” here are a few
tips about what to expect and what to do:
If a front tire fails, the flat tire will create a drag that
pulls the vehicle toward that side. Take your foot off the
accelerator pedal and grip the steering wheel firmly.
Steer to maintain lane position, and then gently brake to
a stop well out of the traffic lane.A rear blowout, particularly on a curve, acts much like a
skid and may require the same correction you’d use
in a skid. In any rear blowout, remove your foot from the
accelerator pedal. Get the vehicle under control by
steering the way you want the vehicle to go. It may be
very bumpy and noisy, but you can still steer. Gently
brake to a stop, well off the road if possible.
{CAUTION:
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous without
the appropriate safety equipment and training.
The jack provided with your vehicle is
designed only for changing a at tire. If it is
used for anything else, you or others could be
badly injured or killed if the vehicle slips off
the jack. Use the jack provided with your
vehicle only for changing a at tire.
If a tire goes flat, the next part shows how to use your
jacking equipment to change a flat tire safely.
5-66