2005 TOYOTA AVALON check engine

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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 key cylindertype ignition switch—
Once you turn the ignition key to “START”
position and release it, the cranking hold
function continues to crank the engine in
“ON” position 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 hold the key in “START” position,
the function will keep cranking for about
30 seconds maximum.
With smart key system—
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,
turn the ignition key to “START” position,
then release it.
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
306 in Section 4.NOTICE
 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
On a vehicle that is equipped with a key,
the engine may 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 engine selector lever is in the “P”
position. Pressing the “ENGINE START
STOP” switch once starts the engine.
Press the “ENGINE START STOP” switch
slowly and firmly.
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 dead if the
electronic key does not work.
You can start the engine by holding the
electronic key close to the “ENGINE
START STOP” switch. For derails, see
“Smart key system” on page 27 in Sec-
tion 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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Smart key system warning light
SYSTEM FUNCTION REMINDERS
Follow the instructions described below if
any of the following warnings occur:(A) A warning buzzer sounds once from
the instrument cluster when the igni-
tion switch is turned on
This indicates that the driver has gotten
into the vehicle without the key. The smart
key system warning light on the instru-
ment panel will come on for 5 seconds.
Operate the ignition switch only after tak-
ing care that the key is in the vehicle.
(B) A warning buzzer beeps repeatedly from the instrument cluster when
opening the driver ’s door
This indicates that the engine is not off
although the transmission selector lever
has been set in the “P” position.
Get out of the vehicle only after turning
off the engine by pressing the “ENGINE
START STOP” switch and checking that
the ignition switch indicator light has gone
off. (C) A warning buzzer sounds once from
the instrument cluster, accompanied
by three warning sounds from the
vehicle when the driver gets out of
the vehicle and closes the door
This indicates that the driver is attempting
to leave the vehicle carrying the key, ne-
glecting to follow the instructions for case
(B) above. In addition, the smart key sys-
tem warning light on the instrument panel
will come on.
Get out of the vehicle only after turning
off the engine by pressing the “ENGINE
START STOP” switch and checking that
the ignition switch indicator light has gone
off. If the driver returns to the vehicle
without carrying the key and begins driv-
ing, a warning buzzer will sound once
more.

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(D) A warning buzzer sounds from thevehicle for two seconds after locking
the door with the door handle switch
This indicates that the driver is attempting
to lock the doors while carrying the key,
neglecting to follow the instructions for
cases (B) and (C) above.
Lock the doors only after turning off the
engine by pressing the “ENGINE START
STOP” switch and checking that the igni-
tion switch indicator light has gone off.
A warning buzzer that sounds even though
the engine has been turned off indicates
that you are attempting to lock the vehicle
with the keys still in the vehicle.
Leave the vehicle only after making sure
that you are carrying the key. (E) A warning buzzer sounds continu-
ously from the instrument cluster
when opening the driver ’s door
This indicates that the transmission selec-
tor lever is in a position other than “P”
and that the engine has not been turned
off.
Get out of the vehicle only after setting
the transmission selector lever in the “P”
position, turning off the engine by pressing
the “ENGINE START STOP” switch and
checking that the ignition switch indicator
light has gone off. (F) A warning buzzer sounds continu-
ously from the instrument cluster
and from the vehicle when closing
the door after getting out of the ve-
hicle
This indicates that the driver is attempting
to leave the vehicle carrying the key, ne-
glecting to follow the instructions for case
(E) above. The smart key system warning
light on the instrument panel will come on.
Get out of the vehicle only after setting
the transmission selector lever in the “P”
position, turning off the engine by pressing
the “ENGINE START STOP” switch and
checking that the ignition switch indicator
light has gone off.

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(G) A warning buzzer sounds once fromthe instrument cluster and three
times from the vehicle when a pas-
senger is getting out of the vehicle
This indicates that the passenger is at-
tempting to leave the vehicle carrying the
key, without the engine having been
turned off. The smart key system warning
light on the instrument panel will also
come on.
When passengers get out of the vehicle,
care should be taken to leave the key
with the driver. If the driver begins driving
after a passenger gets out of the vehicle
carrying the key, a warning buzzer will
sound once more.
(H) A warning buzzer sounds from the vehicle for two seconds when lock-
ing the vehicle from the outside with
the door handle switch
This indicates that the driver is attempting
to lock the door with the key still in the
vehicle.
Leave the vehicle only after making sure
that you are carrying the key. (I) A warning buzzer sounds once from
the instrument cluster when turning
off the ignition switch
This indicates that the key battery is low.
(This warning buzzer sounds only when
the engine has been on or the ignition
switch has been set at the ON for 20
minutes or more.)
Change the key battery ahead of time in
order to ensure that the smart key system
properly.
(J) A warning buzzer sounds continu- ously from the instrument cluster
when opening the driver’s door with
the ignition switch turned off.
This indicates that the steering wheel is
not locked. Turn the engine off and then
open the door in order to lock the steering
wheel. (K) The smart entry and start system
warning light comes on and the
“ENGINE START STOP” switch
flashes green once every second.
This indicates that the steering lock is
stuck. To free it, rock the steering wheel
slightly while pressing the “ENGINE
START STOP” switch.
(L) The smart entry and start system warning light comes on and the
“ENGINE START STOP” switch
flashes amber once every 2 seconds.
This indicates a problem with the steering
lock function. Have your vehicle checked
at a Toyota dealer.