2008 SUZUKI FORENZA check engine

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85Z04-03E
cated 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 techni-
cian in correctly diagnosing any malfunc-
tion.
When the ignition is on, this light should
come on and should go out after a few sec-
onds as a check to show you it is working.
If the light doesn’t come on, have it
repaired.This light will also come on during a mal-
function in one of two ways:
Light Flashing
A misfire condition has been detected. A
misfire increases vehicle emissions and
may damage the emission control sys-
tem on your vehicle. Diagnosis and ser-
vice may be required.
Light On Steady
An emission control system malfunction
has been detected on your vehicle. Diag-
nosis 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 the light stops flashing and remains on
steady, see “If the Light Is On Steady” fol-
lowing.
If the light continues to flash, 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 flashing, see your SUZUKI
dealer for service as soon as possible. Fol-
low the driving guidelines described above.If the Light Is On Steady
You also may be able to correct the emis-
sion 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. See “Filling Your Tank”
in section 5. The diagnostic system can
determine if the fuel cap has been left off
or is improperly installed. A loose or miss-
ing 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 qual-
ity fuel. See “Gasoline Octane” in section
5. Poor fuel quality will cause your engine
not to run as efficiently as designed. You
may notice stalling after start-up, stalling
when you put the vehicle into gear, misfir-
ing, 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.
CAUTION
If you keep driving your vehicle with
this light on, your emission controls
may not work as well, your fuel econ-
omy 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.
CAUTION
Modifications made to the engine,
transmission, exhaust or intake or
fuel system of your vehicle can affect
your vehicle’s emission controls and
may cause this light to come on.
Modifications 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.
Warning Lights, Gauges and Indicators:

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INSTRUMENT PANEL
85Z04-03E
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 SUZUKI dealer can
check the vehicle. Your SUZUKI dealer has
the proper test equipment and diagnostic
tools to fix any mechanical or electrical
problems that may have developed.
Emissions Inspection and Maintenance
Programs
Some state/provincial and local govern-
ments 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 is not work-
ing 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 diag-
nosed 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 sys-tems 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 SUZUKI dealer can pre-
pare the vehicle for inspection.
Oil Pressure LightIf you have a low engine oil pressure prob-
lem, this light will stay on after you start
your engine, or come on when you are
driving. This indicates that your engine is
not receiving enough oil.
The engine could be low on oil, or could
have some other oil problem. Have it fixed
immediately.
The oil light could also come on in three
other situations:
 When the ignition is on but the engine is
not running, the light will come on as a
check to show you it is working. The light
will go out after you start the engine. If it
doesn’t come on with the ignition on, you
may have a problem with the fuse or
bulb. Have it fixed right away. If you’re idling at a stop sign, the light
may blink on and then off.
 If you make a hard stop, the light may
come on for a moment. This is normal.
Fog Lamp LightIf your vehicle has this feature, the fog
lamps indicator light will come on when the
fog lamps are in use.
The light will go out when the fog lamps
are turned off.
WARNING
Don’t keep driving if the oil pressure
is low. If you do, your engine can
become so hot that it catches fire.
You or others could be burned. Check
your oil as soon as possible and have
your vehicle serviced.
CAUTION
Operating your engine with the low
oil pressure light on can result in
severe engine damage which is not
covered by your warranty.
Warning Lights, Gauges and Indicators:

4-3DRIVING YOUR VEHICLE
85Z04-03E
Sometimes, as when you’re driving on
snow or ice, it’s easy to ask more of those
control systems than the tires and road
can provide. That means you can lose con-
trol of your vehicle.BrakingBraking action involves perception time
and reaction time.
First, you have to decide to push on the
brake pedal. That’s perception time. Then
you have to bring up your foot and do it.
That’s reaction time.
Average reaction time is about 3/4 of a
second. But that’s only an average. It might
be less with one driver and as long as two
or three seconds or more with another.
Age, physical condition, alertness, coordi-
nation and eyesight all play a part. So do
alcohol, drugs and frustration. But even in3/4 of a second, a vehicle moving at 60
mph (100 km/h) travels 66 feet (20 m).
That could be a lot of distance in an emer-
gency, so keeping enough space between
your vehicle and others is important.
And, of course, actual stopping distances
vary greatly with the surface of the road
(whether it’s pavement or gravel) the condi-
tion of the road (wet, dry, icy) tire tread the
condition of your brakes the weight of the
vehicle and the amount of brake force
applied.
Avoid needless heavy braking. Some peo-
ple drive in spurts – heavy acceleration fol-
lowed by heavy braking – rather than
keeping pace with traffic. This is a mistake.
Your brakes may not have time to cool
between hard stops. Your brakes will wear
out much faster if you do a lot of heavy
braking. If you keep pace with the traffic
and allow realistic following distances, you
will eliminate a lot of unnecessary braking.
That means better braking and longer
brake life.
If your engine ever stops while you’re driv-
ing, brake normally but don’t pump your
brakes. If you do, the pedal may get harder
to push down. If your engine stops, you will
still have some power brake assist. But you
will use it when you brake. Once the power
assist is used up, it may take longer to stop
and the brake pedal will be harder to push.
Anti-Lock Brake System (ABS)
(if equipped)ABS is an advanced electronic braking
system that will help prevent a braking
skid.
When you start your engine and begin to
drive away, your anti-lock brake system will
check itself. You may hear a momentary
motor or clicking noise while this test is
going on, and you may even notice that
your brake pedal moves a little. This is nor-
mal.
If there’s a problem with the anti-lock brake
system, this warning light will stay on. See
“Anti-Lock Brake System Warning Light” in
section 3.
Your Driving, the Road, and Your Vehicle:

4-11DRIVING YOUR VEHICLE
85Z04-03E
time and energy. See the next part,
“Freeway Driving.”
 Treat a green light as a warning signal. A
traffic light is there because the corner is
busy enough to need it. When a light
turns green, and just before you start to
move, check both ways for vehicles that
have not cleared the intersection or may
be running the red light.Freeway DrivingMile for mile, freeways (also called thru-
ways, parkways, expressways, turnpikes or
superhighways) are the safest of all roads.
But they have their own special rules.
The most important advice on freeway
driving is: Keep up with traffic and keep to
the right. Drive at the same speed most of
the other drivers are driving. Too-fast or
too-slow driving breaks a smooth trafficflow. Treat the left lane on a freeway as a
passing lane.
At the entrance, there is usually a ramp
that leads to the freeway. If you have a
clear view of the freeway as you drive
along the entrance ramp, you should begin
to check traffic. Try to determine where you
expect to blend with the flow. Try to merge
into the gap at close to the prevailing
speed. Switch on your turn signal, check
your mirrors and glance over your shoulder
as often as necessary. Try to blend
smoothly with the traffic flow.
Once you are on the freeway, adjust your
speed to the posted limit or to the prevail-
ing rate if it’s slower. Stay in the right lane
unless you want to pass.
Before changing lanes, check your mirrors.
Then use your turn signal.
Just before you leave the lane, glance
quickly over your shoulder to make sure
there isn’t another vehicle in your “blind”
spot.
Once you are moving on the freeway,
make certain you allow a reasonable fol-
lowing distance.
Expect to move slightly slower at night.
When you want to leave the freeway, move
to the proper lane well in advance. If you
miss your exit, do not, under any circum-
stances, stop and back up. Drive on to the
next exit.The exit ramp can be curved, sometimes
quite sharply. The exit speed is usually
posted. Reduce your speed according to
your speedometer, not to your sense of
motion. After driving for any distance at
higher speeds, you may tend to think you
are going slower than you actually are.
Before Leaving on a Long TripMake sure you’re ready. Try to be well
rested. If you must start when you’re not
fresh – such as after a day’s work – don’t
plan to make too many miles that first part
of the journey. Wear comfortable clothing
and shoes you can easily drive in.
Is your vehicle ready for a long trip? If you
keep it serviced and maintained, it’s ready
to go. If it needs service, have it done
before starting out. Of course, you’ll find
experienced and able service experts in
SUZUKI dealerships all across North
America. They’ll be ready and willing to
help if you need it.
Here are some things you can check
before a trip:
 Windshield Washer Fluid: Is the reser-
voir full? Are all windows clean inside
and outside?
 Wiper Blades: Are they in good shape?
 Fuel, Engine Oil, Other Fluids: Have you
checked all levels?
 Lamps: Are they all working? Are the
lenses clean?
Your Driving, the Road, and Your Vehicle:

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DRIVING YOUR VEHICLE
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 Tires: They are vitally important to a
safe, trouble-free trip. Is the tread good
enough for long-distance driving? Are
the tires all inflated to the recommended
pressure?
 Weather Forecasts: What’s the weather
outlook along your route? Should you
delay your trip a short time to avoid a
major storm system?
 Maps: Do you have up-to-date maps?Highway HypnosisIs there actually such a condition as “high-
way hypnosis”? Or is it just plain falling
asleep at the wheel? Call it highway hyp-
nosis, lack of awareness, or whatever.
There is something about an easy stretch
of road with the same scenery, along with
the hum of the tires on the road, the drone
of the engine, and the rush of the wind
against the vehicle that can make you
sleepy. Don’t let it happen to you! If it does,
your vehicle can leave the road in less than
a second, and you could crash and be
injured.
What can you do about highway hypnosis?
First, be aware that it can happen.
Then here are some tips:
 Make sure your vehicle is well ventilated,
with a comfortably cool interior.
 Keep your eyes moving. Scan the road
ahead and to the sides. Check your rear-
view mirrors and your instruments fre-
quently. If you get sleepy, pull off the road into a
rest, service or parking area and take a
nap, get some exercise, or both. For
safety, treat drowsiness on the highway
as an emergency.
Hill and Mountain RoadsDriving on steep hills or mountains is differ-
ent from driving in flat or rolling terrain.
If you drive regularly in steep country, or if
you’re planning to visit there, here are
some tips that can make your trips safer
and more enjoyable.
 Keep your vehicle in good shape. Check
all fluid levels and also the brakes, tires,
cooling system and transmission. These
parts can work hard on mountain roads.
 Know how to go down hills. The most
important thing to know is this: let your
engine do some of the slowing down.Shift to a lower gear when you go down
a steep or long hill.
 Know how to go uphill. You may want to
shift down to a lower gear. The lower
gears help cool your engine and trans-
mission, and you can climb the hill bet-
ter.
 Stay in your own lane when driving on
two-lane roads in hills or mountains.
Don’t swing wide or cut across the cen-
ter of the road. Drive at speeds that let
you stay in your own lane.
WARNING
If you don’t shift down, your brakes
could get so hot that they wouldn’t
work well. You would then have poor
braking or even none going down a
hill. You could crash. Shift down to let
your engine assist your brakes on a
steep downhill slope.
WARNING
Coasting downhill in NEUTRAL (N) or
with the ignition off is dangerous.
Your brakes will have to do all the
work of slowing you down. They
could get so hot that they wouldn’t
work well. You would then have poor
braking or even none going down a
hill. You could crash. Always have
your engine running and your vehicle
in gear when you go downhill.
Your Driving, the Road, and Your Vehicle:

4-14
DRIVING YOUR VEHICLE
85Z04-03E
cle’s stability when you make a hard stop
on a slippery road.) Whether you have an
anti-lock braking system or not, you’ll want
to begin stopping sooner than you would
on dry pavement. Without anti-lock brakes,
if you feel your vehicle begin to slide, let up
on the brakes a little. Push the brake pedal
down steadily to get the most traction you
can.
Remember, unless you have anti-lock, if
you brake so hard that your wheels stop
rolling, you’ll just slide. Brake so your
wheels always keep rolling and you can
still steer.
 Whatever your braking system, allow
greater following distance on any slip-
pery road.
 Watch for slippery spots. The road might
be fine until you hit a spot that’s covered
with ice. On an otherwise clear road, ice
patches may appear in shaded areas
where the sun can’t reach: around
clumps of trees, behind buildings or
under bridges. Sometimes the surface of
a curve or an overpass may remain icy
when the surrounding roads are clear. If
you see a patch of ice ahead of you,
brake before you are on it. Try not to
brake while you’re actually on the ice,
and avoid sudden steering maneuvers.If You’re Caught in a Blizzard
If you are stopped by heavy snow, you
could be in a serious situation. You should
probably stay with your vehicle unless you
know for sure that you are near help and
you can hike through the snow. Here are
some things to do to summon help and
keep yourself and your passengers safe:
 Turn on your hazard flashers.
 Tie a red cloth to your vehicle to alert
police that you’ve been stopped by the
snow.
 Put on extra clothing or wrap a blanket
around you. If you have no blankets or
extra clothing, make body insulators
from newspapers, burlap bags, rags,
floor mats – anything you can wrap
around yourself or tuck under your cloth-
ing to keep warm.You can run the engine to keep warm, but
be careful.
WARNING
Snow can trap exhaust gases under
your vehicle. This can cause deadly
CO (carbon monoxide) gas to get
inside. CO could overcome you and
kill you. You can’t see it or smell it, so
you might not know it is in your vehi-
cle. Clear away snow from around the
base of your vehicle, especially any
that is blocking your exhaust pipe.
And check around again from time to
time to be sure snow doesn’t collect
there.
Open a window just a little on the
side of the vehicle that’s away from
the wind. This will help keep CO out.
Your Driving, the Road, and Your Vehicle:

5-1SERVICE AND APPEARANCE CARE
85Z04-03E
ServiceYour SUZUKI dealer knows your vehicle
best and wants you to be happy with it. We
hope you’ll go to your SUZUKI dealer for
all your service needs. You’ll get genuine
SUZUKI parts and SUZUKI trained and
supported service people.
We hope you’ll want to keep your SUZUKI
vehicle all SUZUKI. Doing Your Own Service WorkYour vehicle has an air bag system. Before
attempting to do your own service work,
see “Servicing Your Air Bag-Equipped
Vehicle” in section 1.
You should keep a record with all parts
receipts and list the mileage and the date
of any service work you perform. See
“Maintenance Record” in section 6.
Adding Equipment to the Outside of
Yo u r Ve h i c l eThings you might add to the outside of your
vehicle can affect the airflow around it. This
may cause wind noise and affect wind-
shield washer performance. Check with
your SUZUKI dealer before adding equip-
ment to the outside of your vehicle.
FuelUse of the recommended fuel is an impor-
tant part of the proper maintenance of your
vehicle.Gasoline OctaneUse only unleaded gasoline with a posted
octane rating of 87 or higher. In an emer-
gency, you may be able to use a lower
octane rating – as low as 85 – if heavy
knocking does not occur. Refill your tank
with proper fuel as soon as possible. Oth-
erwise, you might damage your engine. If
you are using 87 or higher-octane rating
fuel and you hear heavy knocking, your
engine needs service.California FuelIf your vehicle is certified to meet California
Emission Standards (see the underhood
emission control label), it is designed to
operate on fuels that meet California spec-
ifications. If this fuel is not available in
states adopting California emissions stan-
dards, your vehicle will operate satisfacto-
rily on fuels meeting federal specifications,
but emission control system performance
may be affected. The malfunction indicator
lamp may turn on (see Malfunction Indica-
tor Lamp in section 3) and your vehicle
may fail a smog-check test. If this occurs,
return to your SUZUKI dealer for diagno-
sis.
WARNING
You can be injured and your vehicle
could be damaged if you try to do
service work on a vehicle without
knowing enough about it.
 Be sure you have sufficient knowl-
edge, experience, the proper
replacement parts and tools before
you attempt any vehicle mainte-
nance task.
 Be sure to use the proper nuts,
bolts and other fasteners.
“English” and “metric” fasteners
can be easily confused. If you use
the wrong fasteners, parts can later
break or fall off. You could be hurt.
Service:
Fuel:

5-2
SERVICE AND APPEARANCE CARE
85Z04-03E
AdditivesTo provide cleaner air, all gasolines in the
United States are now required to contain
additives that will help prevent engine and
fuel system deposits from forming, allow-
ing your emission control system to work
properly. You should not have to add any-
thing to your fuel. However, some gaso-
lines contain only the minimum amount of
additive required to meet U.S. Environ-
mental Protection Agency regulations.
SUZUKI recommends that you buy gaso-
lines that are advertised to help keep fuel
injectors and intake valves clean. If your
vehicle experiences problems due to dirty
injectors or valves, try a different brand of
gasoline.
Gasoline containing oxygenates, such as
ethers and ethanol, and reformulated gas-
olines may be available in your area to
contribute to clean air. SUZUKI recom-
mends that you use these gasolines.
Some gasolines that are not reformulated
for low emissions may contain an octane-
enhancing additive called methylcyclopen-tadienyl manganese tricarbonyl (MMT);
ask the attendant where you buy gasoline
whether the fuel contains MMT. SUZUKI
does not recommend the use of such gas-
olines. Fuels containing MMT can reduce
the life of spark plugs and the performance
of the emission control system may be
affected. The malfunction indicator lamp
may turn on. If this occurs, return to your
SUZUKI dealer for service.
Fuels in Foreign CountriesIf you plan on driving in another country
outside the United States or Canada, the
proper fuel may be hard to find. Never use
leaded gasoline or any other fuel not rec-
ommended in the previous text on fuel.
Costly repairs caused by use of improper
fuel wouldn’t be covered by your warranty.
To check the fuel availability, ask an auto
club, or contact a major oil company that
does business in the country where you’ll
be driving.
Filling Your Tank
CAUTION
Your vehicle was not designed for
fuel that contains methanol. Don’t
use fuel containing methanol. It can
corrode metal parts in your fuel sys-
tem and also damage the plastic and
rubber parts. That damage wouldn’t
be covered under your warranty.
WARNING
Fuel vapor burns violently and a fuel
fire can cause severe injuries. To help
avoid injuries to you and others, read
and follow all the instructions on the
pump island. Turn off your engine
when you are refueling. Don’t smoke
if you’re near fuel or are refueling
your vehicle. Keep sparks, flames
and smoking materials away from
fuel. Don’t leave the fuel pump unat-
tended when refueling your vehicle –
this is against the law in some
places. Keep children away from the
fuel pump; never let children pump
fuel.
Fuel: