2006 TOYOTA HIGHLANDER HYBRID check engine

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Before making these checks, make sure
you have sufficient fuel and that you have
followed the correct starting procedure giv-
en in “How to start the hybrid system” on
page 326 in Section 3. If your vehicle is
equipped with the engine immobilizer sys-
tem, also check whether the other keys
will start the hybrid system. If they work,
your key may be broken. Have the key
checked at your Toyota dealer. If none of
your keys work, there may be a malfunc-
tion in the immobilizer system. Call your
Toyota dealer. (See “Keys (with engine
immobilizer system)” on page 22 in Sec-
tion 1−2.)
If the instrument cluster dims or the
instrument cluster display turns off
with the ignition on... 1. Check that the auxiliary battery termi- nals are tight and clean.
2. If the auxiliary battery terminals are O.K., the auxiliary battery is dis-
charged. You may try jump starting.
See “(b) Jump starting” on page 340
for further instructions.
NOTICE
Hybrid vehicles cannot be push
started.
If the instrument cluster displays with
normal brightness levels with the igni-
tion on...
The hybrid system may be faulty. Contact
your Toyota dealer. If the auxiliary battery is discharged,
the hybrid system can be started by
jump starting. Depending on the vehicle
condition, however, the hybrid system
may not start.
To avoid serious injury and damage to
your vehicle which might result from an
explosion of the battery, acid burns,
electrical burns, or damaged electronic
components, follow instructions careful-
ly.
If you are unsure about how to follow this
procedure, we strongly recommend that
you seek the help of a competent me-
chanic or towing service.
CAUTION
Batteries contain sulfuric acid
which is poisonous and corrosive.
Wear protective safety glasses when
jump starting, and avoid spilling
acid on your skin, clothing, or ve-
hicle.
If your vehicle will not start—
(a) Simple checks
(b) Jump starting

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If your hybrid system stalls while driv-
ing...
1. Reduce your speed gradually, keeping a straight line. Move cautiously off the
road to a safe place.
2. Turn on your emergency flashers.
3. Turn the ignition key to “ACC” or “LOCK”, and try starting the hybrid
system again.
If the hybrid system will not start, see “If
your vehicle will not start”.
CAUTION
When the hybrid system is not oper-
ating, the power assist for the brakes
and steering will not work, so steer-
ing and braking will be much more
difficult than usual.
Any of the following may indicate that
the hybrid system has overheated:
The engine coolant temperature
gauge indicates overheating.
A “WATER TEMP” warning message
appears on the multiinformation
display.
A loss of power is experienced.
A loud knocking or pinging noise is
heard.
If the hybrid system overheats, follow
the procedures below: 1. Pull safely off the road, stop the ve- hicle and turn on your emergency
flashers. Put the hybrid transmission in
“P” and apply the parking brake. Turn
off the air conditioning if it is being
used.
2. If coolant or steam is boiling out of the radiator or reservoir, stop the hybrid
system. Wait until the steam subsides
before opening the hood. If there is no
coolant boiling over or steam, leave the
ignition turned on and make sure the
electric cooling fan is operating. If it is
not, turn the ignition off.
CAUTION
To help avoid personal injury, keep
the hood closed until there is no
steam. Escaping steam or coolant is
a sign of very high pressure.
3. Look for obvious coolant leaks from theradiator, hoses, and under the vehicle.
However, note that water draining from
the air conditioning is normal if it has
been used.
CAUTION
When the hybrid system is on, keep
hands and clothing away from the
moving fan.
4. If the coolant is leaking, stop the hy-
brid system immediately. Call a Toyota
dealer for assistance.
5. If there are no obvious leaks, check the coolant reservoir. If it is dry, add
coolant to the reservoir while the hy-
brid system is on. Fill it about half full.
For the coolant type, see “Coolant type
selection” on page 389 in Section 7 −2.
If your hybrid system stalls
while driving If your vehicle overheats

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4. With pushing down the shift lock
override button, shift out of the “P”
position while depressing the brake
pedal.
As the hybrid system starts only with the
transmission in the “P” position, put the
selector lever in “P” whenever starting the
system.
Be sure to have the system checked by
your Toyota dealer as soon as possible. You can purchase a new key at your
Toyota dealer if you can give them the
key number. If your vehicle is equipped
with the engine immobilizer system, the
dealer will also need your master key.
Vehicles with engine immobilizer system—
Even if you lose only one key, contact
your Toyota dealer to make a new key. If
you lose all your master keys, you cannot
make new keys; the whole engine immobi-
lizer system must be replaced.
See the suggestion given in “Keys” on
page 22 in Section 1
−2.
If your keys are locked in the vehicle and
you cannot get a duplicate, many Toyota
dealers can still open the door for you,
using their special tools. If you must
break a window to get in, we suggest
breaking the smallest side window be-
cause it is the least expensive to replace.
Be extremely cautious to avoid cuts from
the glass. You can purchase a new wireless re-
mote control transmitter at your Toyota
dealer.
Have the registered identification numbers
of your transmitters deleted from your ve-
hicle by your Toyota dealer as soon as
possible to avoid the possibility of theft or
an accident. Then, have the identification
number of your new transmitter registered.
At the same time, you must bring all of
the remaining transmitters to have them
registered again as well.
You can use the wireless remote control
system with the new transmitter. Contact
your Toyota dealer for detailed information.
If you lose your keys
If you lose your wireless
remote control transmitter

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Check the interior of your vehicle. Wa-
ter and dirt can accumulate under the
floor mats and could cause corrosion. Oc-
casionally check under the mats to make
sure the area is dry. Be particularly care-
ful when transporting chemicals, cleans-
ers, fertilizers, salt, etc.; these should be
transported in proper containers. If a spill
or leak should occur, immediately clean
and dry the area.
Use mud shields on your wheels. If you
drive on salted or gravel roads, mud
shields help protect your vehicle. Full −size
shields, which come as near to the ground
as possible, are the best. We recommend
that the fittings and the area where the
shields are installed be treated to resist
corrosion. Your Toyota dealer will be
happy to assist in supplying and installing
the shields if they are recommended for
your area.
Keep your vehicle in a well ventilated
garage or a roofed place. Do not park
your vehicle in a damp, poorly venti-
lated garage. If you wash your vehicle in
the garage, or if you drive it covered with
water or snow, your garage may be so
damp as to cause corrosion. Even if your
garage is heated, a wet vehicle can cor-
rode if the ventilation is poor. Your Toyota is a hybrid vehicle. Pay
particular attention when washing your
To y o t a .
NOTICE
Before washing your Toyota, be sure
to observe the following in order to
avoid the risk of damage to your ve-
hicle.
Do not splash water on the electric
components in the engine compart-
ment. This may cause malfunction of
the electric components.
Washing your Toyota
Keep your vehicle clean by regular
washing.
The following cases may cause weakness
to the paint or corrosion to the body and
parts. Wash your vehicle as soon as pos-
sible.
When driving in a coastal area
When driving on a road sprinkled with
antifreeze
When exposed to coal tar, tree sap,
bird droppings and carcass of an insect
When driving in areas where there is
a lot of smoke, soot, dust, iron dust or
chemical substances
When the vehicle becomes remarkably
dirty with dust and mud
Handwashing your Toyota
Work in the shade and wait until the
vehicle body is not warm to the touch.
CAUTION
When cleaning under floor or chassis,
be careful not to injure your hands.
1. Rinse off loose dirt with a hose. Re- move any mud or road salt from the
underside of the vehicle or the wheel
wells.
2. Wash with a mild car −wash soap,
mixed according to the manufacturer ’s
instructions. Use a soft cotton mitt and
keep it wet by dipping it frequently into
the wash water. Do not rub hard—let
the soap and water remove the dirt.
Fuel filler door: Do not apply water (high −
pressure car wash, for example) at or
near the fuel tank inlet with the fuel filler
door opened. If the water enters the air
vent, you may experience trouble with re-
fueling or rough engine idling.
Wa sh in g an d waxin g yo u r
To y o t a

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If you are a skilled do−it−yourself mechan-
ic, the Toyota service manuals are recom-
mended. Please be aware that do −it−your-
self maintenance can affect your warranty
coverage. See “Owner ’s Warranty Informa-
tion Booklet” or “Owner ’s Manual Supple-
ment” for the details. Listed below are the general maintenance
items that should be performed as fre-
quently as specified. In addition to check-
ing the items listed, if you notice any
unusual noise, smell or vibration, you
should investigate the cause or take your
vehicle to your Toyota dealer or a quali-
fied service shop immediately. It is recom-
mended that any problem you notice be
brought to the attention of your dealer or
the qualified service shop for their advice.
CAUTION
Make these checks only with ade-
quate ventilation if the hybrid system
is turned on.
IN THE ENGINE COMPARTMENT
Items listed below should be checked
from time to time, e.g. each time when
refueling.
Washer fluid
Make sure there is sufficient fluid in the
tank. See page 403 in Section 7
−3 for
additional information. Coolant level
Make sure the coolant level is between
the “FULL” and “LOW” lines on the see
−
through reservoir when the hybrid system
is cold. See page 388 in Section 7 −2 for
additional information.
Radiator, condenser and hoses
Check that the front of the radiator and
condenser are clean and not blocked with
leaves, dirt or insects. See page 390 in
Section 7 −2 for additional information.
Auxiliary battery electrolyte l evel
Your Toyota has a maintenance free bat-
tery. You do not have to add distilled wa-
ter. For longer life of the battery, however,
see page 400 for additional information.
Brake fluid level
Make sure the brake fluid level is correct.
See page 390 in Section 7 −2 for addition-
al information.
Engine oil level
Check the level on the dipstick with the
hybrid system turned off and the vehicle
parked on a level spot. See page 386 in
Section 7 −2 for additional information.
General maintenance

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Exhaust system
If you notice any change in the sound of
the exhaust or smell exhaust fumes, have
the cause located and corrected immedi-
ately. (See “Engine exhaust cautions” on
page 305 in Section 2.)
INSIDE THE VEHICLE
Items listed below should be checked
regularly, e.g. while performing periodic
services, cleaning the vehicle, etc.
Lights
Make sure the headlights, stop lights, tail
lights, turn signal lights, and other lights
are all working. Check headlight aim.
Service reminder indicators and warning
buzzers
Check that all service reminder indicators
and warning buzzers function properly.
Steering wheel
Check that it has the specified free play.
Be alert for changes in steering condition,
such as hard steering or strange noise. Seats
Check that all seat controls such as seat
adjusters, seatback recliner, etc. operate
smoothly and that all latches lock securely
in any position. Check that the head re-
straints move up and down smoothly and
that the locks hold securely in any latched
position. For folding
−down rear seatbacks,
check that the latches lock securely.
Seat belts
Check that the seat belt system such as
buckles, retractors and anchors operate
properly and smoothly. Make sure the belt
webbing is not cut, frayed, worn or dam-
aged.
Accelerator pedal
Check the pedal for smooth operation and
uneven pedal effort or catching.
Brake pedal
Check the pedal for smooth operation and
that the pedal has the proper clearance.
Check the brake booster function.
Brakes
In a safe place, check that the brakes do
not pull to one side when applied. Parking brake
Check that the pedal has the proper travel
and that, on a safe incline, your vehicle
is held securely with only the parking
brake applied.
Transmission “Park” mechanism
Check the lock release button of the se-
lector lever for proper and smooth opera-
tion. On a safe incline, check that your
vehicle is held securely with the selector
lever in “P” position and all brakes re-
leased.
OUTSIDE THE VEHICLE
Items listed below should be performed
from time to time, unless otherwise
specified.
Fluid leaks
Check underneath for leaking fuel, oil, wa-
ter or other fluid after the vehicle has
been parked for a while. If you smell fuel
fumes or notice any leak, have the cause
found and corrected immediately.
Doors and engine hood
Check that all side doors and back door
operate smoothly and all latches lock se-
curely. Make sure the engine hood sec-
ondary latch secures the hood from open-
ing when the primary latch is released.

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Tire inflation pressure
Check the pressure with a gauge ev-
ery two weeks, or at least once a
month. See page 391 in Section 7 −2
for additional information.
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See page
393 in Section 7− 2 for additional in-
formation. When checking the tires,
make sure no nuts are missing, and
check the nuts for looseness. Tighten
them if necessary.
Tire rotation
Rotate the tires according to the
maintenance schedule. (For sched-
uled maintenance information, please
refer to the “Scheduled Maintenance
Guide” or “Owner ’s Manual Supple-
ment”.) See page 395 in Section 7 −2
for additional information.Be on the alert for changes in perfor-
mance, sounds, and visual tip −offs that
indicate service is needed. Some impor-
tant clues are as follows:
Engine missing, stumbling, or pinging
Appreciable loss of power
Strange engine noises
A leak under the vehicle (however, wa-
ter dripping from the air conditioning
after use is normal.)
Change in exhaust sound (This may
indicate a dangerous carbon monoxide
leak. Drive with the windows open and
have the exhaust system checked im-
mediately.)
Flat −looking tire; excessive tire squeal
when cornering; uneven tire wear
Vehicle pulls to one side when driving
straight on a level road
Strange noises related to suspension
movement
Loss of brake effectiveness; spongy
feeling brake pedal; pedal almost
touches floor; vehicle pulls to one side
when braking
Engine coolant temperature continually
higher than normal If you notice any of these clues, take your
vehicle to your Toyota dealer as soon as
possible. It probably needs adjustment or
repair.
CAUTION
Do not continue driving with the ve-
hicle unchecked. It could result in se-
rious vehicle damage and possibly
personal injury.
Does your vehicle need
repairing?

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Removing clip
Installing clip
Before checking the fuse or replacing
the left front light bulbs, etc. in the
engine compartment, remove the engine
compartment covers as shown in the
illustrations:
1. Push the core of the clips and remove the clips.
2. Remove the cover.
Be careful not to lose the removed plastic
clips.
After checking the items, install the en-
gine compartment covers and insert the
plastic clips in their original positions.
NOTICE
After installing the engine compart-
ment covers, make sure the covers
are securely in their original posi-
tions.
Fuse locations