2006 TOYOTA AVALON check engine

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CAUTION
Avoid inhaling the engine exhaust.
It contains carbon monoxide, which
is a colorless and odorless gas. It
can cause unconsciousness or even
death.
Make sure the exhaust system has
no holes or loose connections. The
system should be checked from
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the system
checked immediately.
Do not run the engine in a garage
or enclosed area except for the
time needed to drive the vehicle in
or out. The exhaust gases cannot
escape, making this a particularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the engine run-
ning. If it is unavoidable, however,
do so only in an unconfined area
and adjust the heating or cooling
system to force outside air into the
vehicle.
Keep the trunk lid closed while
driving. An open or unsealed trunk
lid may cause exhaust gases to be
drawn into the vehicle.
To allow proper operation of your
vehicle’s ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the trunk lid closed. Have
the cause immediately located and
corrected.
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are as
follows.
Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis-
ton moves downwards in the cylinder.
High negative pressure generated when
the vehicle is decelerating sucks some
of this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned
by the high temperature combustion
gases during the combustion process.
Engine exhaust cautionsFacts about engine oil
consumption

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Oil is also used to lubricate the stems
of the intake valves. Some of this oil
is sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem-
perature exhaust gases also burn the
oil used to lubricate the exhaust valve
stems.
The amount of engine oil consumed de-
pends on the viscosity of the oil, the
quality of the oil and the conditions the
vehicle is driven under.
More oil is consumed by high −speed driv-
ing and frequent acceleration and decel-
eration.
A new engine consumes more oil, since
its pistons, piston rings and cylinder walls
have not become conditioned.
Oil consumption: Max. 1.0 L per 1000
km (1.1 qt./600 miles, 0.9 Imp. qt./600
miles)
When judging the amount of oil con-
sumption, note the that oil may become
diluted and make it difficult to judge
the true level accurately. As an example, if a vehicle is used for
repeated short trips, and consumes a nor-
mal amount of oil, the dipstick may not
show any drop in the oil level at all, even
after 1000 km (600 miles) or more. This
is because the oil is gradually becoming
diluted with fuel or moisture, making it
appear that the oil level has not changed.
The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an expressway, making it
appear that oil is excessively consumed
after driving at high speeds.
IMPORTANCE OF ENGINE OIL LEVEL
CHECK
One of the most important points in prop-
er vehicle maintenance is to keep the en-
gine oil at the optimum level so that oil
function will not be impaired. Therefore, it
is essential that the oil level be checked
regularly. Toyota recommends that the oil
level be checked every time you refuel
the vehicle.
NOTICE
Failure to check the oil level regularly
could lead to serious engine trouble
due to insufficient oil.
For detailed information on oil level check,
see “Checking the engine oil level” on
page 350 in Section 7
−2.

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ANTILOCK BRAKE SYSTEM
The antilock brake system is designed
to help prevent lockup of the wheels
during a sudden braking or braking on
slippery road surfaces. This assists in
providing directional stability and steer-
ing performance of the vehicle under
these circumstances.
Effective way to press the ABS brake
pedal: When the anti −lock brake system
function is in action, you may feel the
brake pedal pulsating and hear a noise.
In this situation, to let the anti −lock
brake system work for you, just hold the
brake pedal down more firmly. Do not
pump the brake in a panic stop. This
will result in reduced braking performan-
ce.
The anti −lock brake system becomes op-
erative after the vehicle has accelerated
to a speed in excess of approximately 10
km/h (6 mph). It stops operating when the
vehicle decelerates to a speed below
approximately 5 km/h (3 mph).
Depressing the brake pedal on slippery
road surfaces such as on a manhole cov-
er, a steel plate at a construction site,
joints in a bridge, etc. on a rainy day
tends to activate the anti −lock brake sys-
tem. You may hear a click or motor sound in
the engine compartment for a few seconds
when the engine is started or just after
the vehicle is started. This means that the
anti
−lock brake system is in the self
check mode, and does not indicate a mal-
function.
When the antilock brake system is ac-
tivated, the following conditions may
occur. They do not indicate a malfunc-
tion of the system:
You may hear the anti −lock brake sys-
tem operating and feel the brake pedal
pulsating and the vibrations of the ve-
hicle body and steering wheel. You
may also hear the motor sound in the
engine compartment even after the ve-
hicle is stopped.
At the end of the anti −lock brake sys-
tem activation, the brake pedal may
move a little forward.
CAUTION
Do not overestimate the antilock
brake system: Although the antilock
brake system assists in providing ve-
hicle control, it is still important to
drive with all due care and maintain
a moderate speed and safe distance
from the vehicle in front of you, be-
cause there are limits to the vehicle
stability and effectiveness of steering
wheel operation even with the anti
lock brake system on.
If tire grip performance exceeds its
capability, or if hydroplaning occurs
during high speed driving in the rain,
the antilock brake system does not
provide vehicle control.

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DRUMINDISC TYPE PARKING BRAKE
SYSTEM
Your vehicle has a drum−in −disc type
parking brake system. This type of brake
system n eeds bedding −down of the brake
shoes periodically or whenever the parking
brake shoes and/or drums are replaced.
Have your Toyota dealer perform the bed-
ding− down. BRAKE ASSIST SYSTEM (vehicles with
vehicle stability control system)
When you slam the brakes on, the
brake assist system judges as an emer-
gency stop and provides more powerful
braking for a driver who cannot hold
down the brake pedal firmly.
When you slam the brakes on, more pow-
erful braking will be applied. At this time,
you may hear a sound in the engine
compartment and feel the vibration of the
brake pedal. This does not indicate a mal-
function.
The brake assist system becomes opera-
tive after the vehicle has accelerated to
a speed in excess of approximately 10
km/h (6 mph). It stops operating when the
vehicle decelerates to a speed below
approximately 5 km/h (3 mph).
For an explanation of this system’s warn-
ing light, see “Service reminder indicators
and warning buzzers” on page 145 in Sec-
tion 1
−6.
The brake pad wear limit indicators on
your disc brakes give a warning noise
when the brake pads are worn to where
replacement is required.
If you hear a squealing or scraping noise
while driving, have the brake pads
checked and replaced by your Toyota
dealer as soon as possible. Expensive ro-
tor damage can result if the pads are not
replaced when necessary.
Brake pad wear limit
indicators

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1. Check the area around the vehicle be-fore entering it.
2. Adjust seat position, seatback angle, seat cushion angle, seat cushion
length, head restraint height, steering
wheel angle and length.
3. Adjust the inside and outside rear view mirrors.
4. Lock all the doors.
5. Fasten seat belts. With smart key system only—
Once you press “ENGINE START STOP”
switch (engine switch) and release it, the
cranking hold function continues to crank
the engine until it starts.
The function stops cranking the engine
after about 25 seconds maximum if the
engine has not started yet. When you
crank the engine again, wait a few sec-
onds and restart it.
If you press and hold the “ENGINE
START STOP” switch, the function will
keep cranking for about 30 seconds maxi-
mum. 1. Apply the parking brake firmly.
2. Turn off unnecessary lights and acces-
sories.
3. Put the selector lever in “P”. If you need to restart the engine while the
vehicle is moving, put the selector le-
ver in “N”. A starter safety device will
prevent the starter from operating if the
selector lever is in any drive position.
4. Depress the brake pedal and hold it to the floor until driving off.
Before starting the engine How to start the engine—
—Cranking hold function
(a) Before cranking

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Before starting the engine, be sure to fol-
low the instructions in “(a) Before crank-
ing”.
Normal starting procedure
The multiport fuel injection system/sequen-
tial multiport fuel injection system in your
engine automatically controls the proper
air−fuel mixture for starting. You can start
a cold or hot engine as follows:
With your foot off the accelerator pedal,
crank the engine by turning the key to
“START” position. Release it when the en-
gine starts.
Engine should be warmed up by driving,
not in idle. For warming up, drive with
smoothly turning engine until engine cool-
ant temperature is within normal range.
If the engine stalls...
Simply restart it, using the correct proce-
dure given in normal starting.
If the engine will not start...
See “If your vehicle will not start” on page
308 in Section 4.NOTICE
 Do not crank for more than 30 se-
conds at a time. This may overheat
the starter and wiring systems.
 Do not race a cold engine.
 If the engine becomes difficult to
start or stalls frequently, have the
engine checked immediately.
PUSH BUTTON START FUNCTION
The engine can be started by pressing the
“ENGINE START STOP” switch.
Before starting the engine, be sure to fol-
low the instructions in “(a) Before crank-
ing”.
Normal starting procedure
The multiport fuel injection system/sequen-
tial multiport fuel injection system in your
engine automatically controls the proper
air −fuel mixture for starting. You can start
a cold or hot engine as follows:
(b) Starting the engine
(with key cylindertype
ignition switch) (b) Starting the engine
(with smart key system)

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When the key is in the vehicle (on your
person), it is possible to start the engine.
With the brake pedal firmly depressed, the
indicator light on the “ENGINE START
STOP” switch will turn green. Check that
the automatic transmission selector lever
is in the “P” position. Pressing the “EN-
GINE START STOP” switch once starts
the engine.
Press the “ENGINE START STOP” switch
slowly and firmly.
Engine should be warmed up by driving,
not in idle. For warming up, drive with
smoothly turning engine until engine cool-
ant temperature is within normal range.
If the engine stalls...
Simply restart it, using the correct proce-
dure given in normal starting.
If the engine will not start...
In the following cases, the engine will not
start.
If a buzzer sounds from the vehicle
and the smart key system warning light
comes on when pressing the “ENGINE
START STOP” switch, this indicates
that the key is not in the vehicle.
If the key is placed in the trunk, the
engine cannot be started.
There are instances in which the en-
gine will not start, even if the key is
in the vehicle (e.g. on the floor, in the
cup holder or glove box).When the push button start function
does not operate properly, the following
may be causes:
The key battery may be discharged if
the electronic key does not work.
You can start the engine by touching
the Toyota logo side of the electronic
key to the “ENGINE START STOP”
switch. For derails, see “Smart key
system” on page 27 in Section 1
−2.
Replace the key battery as soon as
possible. (See “—Replacing battery” on
page 25 in Section 1 −2.)
The engine was repeatedly turned on
and off over a short period.
Wait 10 seconds and then start the
engine.
If the green indicator light on the
“ENGINE START STOP” switch flashes
and the smart key system warning light
on the instrument cluster comes on,
the steering wheel is locked.
To free it, rock the steering wheel
slightly while pressing the “ENGINE
START STOP” switch.

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If the amber indicator light on the
“ENGINE START STOP” switch flashes
and the smart key system warning light
on the instrument cluster comes on,
there is a problem in the push button
start function or the steering lock func-
tion.
Contact your Toyota dealer and have
your vehicle and all keys inspected.
In addition to the above, there are
instances in which the smart key sys-
tem does not operate properly because
of the circumstances of use. For de-
tails, see “Smart key system” on page
27 in Section 1
−2.
In cases other than those described
above, it is possible that a problem has
occurred in an area other than the start
system. See “If your vehicle will not start”
on page 308 in Section 4. When the battery is disconnected or
run down,
the push button start function
memorizes the current mode. After you
reconnect, replace, or recharge the bat-
tery, the memorized mode is selected au-
tomatically. In any of these cases, turn off
the engine if the engine comes on.
Wait 10 seconds to start the engine after
the battery has been reconnected. The
engine may not start on the first try. This
does not indicate a malfunction.
NOTICE
 Do not race a cold engine.
 If the engine becomes difficult to
start or stalls frequently, have the
engine checked immediately.
TIPS FOR USING SMART KEY SYSTEM
When using the smart key system, it is
possible to start or stop the engine as
long as the key is on your person.
For this reason, it is possible that a pas-
senger may remove the key from the ve-
hicle without the driver being aware of the
fact. In such a case, it is not possible to
restart the engine after having turned it
off. In addition, it is possible that one may
get out of the vehicle without being aware
that the ignition switch has not been
turned off completely.
When driving or getting in or out of the
vehicle, drivers should make sure that
they are carrying the key.
CAUTION
Do not touch the “ENGINE START
STOP” switch (engine switch) while
driving.
If you have to make an emergency stop,
press and hold the “ENGINE START
STOP” switch for more than 3 seconds.
Driving and parking using
smart key system