2001 TOYOTA HIGHLANDER check engine light

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to ONº.
The warning light remains on after the
ignition key is turned to ONº.
The warning light comes on while driv-
ing.
The TRAC OFFº indicator light will come
on when the VSCº warning light comes
on even if the TRAC OFFº switch is not
pushed.The traction control system automatical-
ly helps prevent the spinning of 4
wheels when the vehicle is started or
accelerated on slippery road surfaces.
When the ignition key is turned to ONº,
the system automatically turns on.CAUTION
Under certain slippery road condi-
tions, full traction of the vehicle and
power against 4 wheels cannot be
maintained, even though the traction
control system is in operation. Do not
drive the vehicle under any speed or
maneuvering conditions which may
cause the vehicle to lose traction
control. In situations where the road
surface is covered with ice or snow,
your vehicle should be fitted with
snow tires or tire chains. Always
drive at an appropriate and cautious
speed for the present road condi-
tions.
NORMAL DRIVING MODE
Leave the system on during the ordi-
nary driving so that it can operate
when needed.
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the trac-
tion control system is in the self- check
mode, but does not indicate a malfunction.
Traction control system
(four- wheel drive models)

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
The vehicle stability control system
helps provide comprehensive control of
the systems such as anti- lock brake
system, traction control, engine control,
etc. This system automatically controls
the brakes and engine to help prevent
the vehicle from skidding when corner-
ing on a slippery road surface or oper-
ating steering wheel abruptly.
This system activates when the vehicle
speed is about more than 15 km/h (9
mph).
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the sys-
tem is in the self- check mode, but does
not indicate a malfunction.CAUTION
Do not rely excessively on the ve-
hicle stability control system. Even
if the system is operating, it cannot
completely eliminate the possibility
of an accident. Always keep safe
driving in mind, as reckless driving
increases the risk of an accident. If
the slip indicator light blinks, spe-
cial care should be taken while
driving.
Only use tires of specified size. The
size, manufacture, brand and tread
pattern for all 4 tires should be the
same. If you use the tires other
than specified, or different type or
size, the vehicle stability control
system may not function correctly.
When replacing the tires or wheels,
contact your Toyota dealer. (See
Checking and replacing tiresº on
page 388 in Section 7- 2.)
If the vehicle is going to skid during driv-
ing, the slip indicator light blinks and an
alarm sounds intermittently. Special care
should be taken while driving.
The slip indicator light comes on for a few
seconds when the ignition key is turned
to ONº. If the indicator light does not
come on when the ignition is turned on,
contact your Toyota dealer.
Vehicle stability control
system

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
Low level Full level
Add oil O.K. Too full
2AZ- FE engine
Low level Full level
Add oil O.K. Too full
3MZ- FE engine
With the engine at operating tempera-
ture and turned off, check the oil level
on the dipstick.
1. To get a correct reading, the vehicle
should be on level ground. After turning
off the engine, wait a few minutes for
the oil to drain back into the bottom of
the engine.
2. Pull the dipstick out, hold a rag under
the end and wipe it clean.
3. Reinsert the dipstickÐpush it in as far
as it will go, or the reading will not be
correct.
4. Pull the dipstick out and look at the oil
level while holding a rag under the
end.
CAUTION
Be careful not to touch the hot ex-
haust manifold.
NOTICE

Be careful not to drop engine oil on
the vehicle components.

To avoid drops of the engine oil
falling when you pull out the engine
oil dipstick, make sure to hold a
rag under the dipstick.
If the oil level is below or only slightly
above the low level, add engine oil of
the same type as already in the engine.
Remove the oil filler cap and add engine
oil in small quantities at a time, checking
the dipstick. We recommend that you use
a funnel when adding oil.
The approximate quantity of oil needed to
raise the level between low and full on the
dipstick is indicated below for reference.
When the level reaches within the correct
range, install the filler cap hand- tight.
Oil quantity, L (qt., lmp. qt.):
2AZ- FE engine 1.0 (1.1, 0.9)
3MZ- FE engine 1.5 (1.6, 1.3)
Checking the engine oil level

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
If either of the above parts are extremely
dirty or you are not sure of their condi-
tion, take your vehicle to a Toyota dealer.
CAUTION
To prevent burning yourself, be care-
ful not to touch the radiator or con-
denser when the engine is hot.
NOTICE
To prevent damage to the radiator
and condenser, do not perform the
work by yourself.
To check the fluid level, simply look at
the see- through reservoir. The level
should be between the MAXº and
MINº lines on the reservoir.
It is normal for the brake fluid level to go
down slightly as the brake pads wear. So
be sure to keep the reservoir filled.
If the reservoir needs frequent refilling, it
may indicate a serious mechanical prob-
lem.
If the level is low, add SAE J1703 or
FMVSS No.116 DOT 3 brake fluid to the
brake reservoir.Remove and replace the reservoir cap by
hand. Fill the brake fluid to the dotted
line. This brings the fluid to the correct
level when you put the cap back on.
Use only newly opened brake fluid. Once
opened, brake fluid absorbs moisture from
the air, and excess moisture can cause a
dangerous loss of braking.
CAUTION
Take care when filling the reservoir
because brake fluid can harm your
hands or eyes. If fluid gets on your
hands or in your eyes, flush the af-
fected area with clean water immedi-
ately. If you still feel uncomfortable
with your hands or eyes, go to the
doctor.
NOTICE
If you spill some of the fluid, be sure
to wipe it off to prevent it from dam-
aging the parts or paintwork.
Checking the radiator and
condenserChecking brake fluid

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
NOTICE

Be sure the engine and all accesso-
ries are off before performing main-
tenance.

When checking the battery, remove
the ground cable from the negative
terminal (- º mark) first and rein-
stall it last.

Be careful not to cause a short cir-
cuit with tools.

Take care no solution gets into the
battery when washing it.
If the battery is disconnected or run
down, the moon roof may not operate
automatically and the jam protection func-
tion will not function correctly after you
reconnect, replace or recharge the battery.
In any of these cases, you should normal-
ize the moon roof. To normalize the moon
roof, see Electric moon roofº on page 36
in Section 1- 2.
Ty p e A
Green DarkClear or
light yellow
Ty p e B
Blue White Red
CHECKING BY INDICATOR
Check the battery condition by the indi-
cator color.
Indicator color
ConditionTy p e ATy p e BCondition
GreenBlueGood
DarkWhite
Charging necessary.
Have battery
checked by your
Toyota dealer.
Clear or
light
yellow
RedHave battery
checked by your
Toyota dealer.
During recharging, the battery is pro-
ducing hydrogen gas.
Therefore, before recharging:
1. If recharging with the battery installed
on the vehicle, be sure to disconnect
the ground cable.
2. Be sure the power switch on the re-
charger is off when connecting the
charger cables to the battery and when
disconnecting them.
CAUTION

Always charge the battery in an un-
confined area. Do not charge the
battery in a garage or closed room
where there is not sufficient ventila-
tion.

Only do a slow charge (5 A or
less). Charging at a quicker rate is
dangerous. The battery may ex-
plode, causing personal injuries.
NOTICE
Never recharge the battery while the
engine is running. Also, be sure all
accessories are turned off.
ÐChecking battery condition Battery recharging precautions

G24767
Skid Control ECU
(harness side connector)
S27
BRL
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-855
1045 Author
: Date
:
INSPECTION PROCEDURE
HINT:
When releasing the parking brake, set the chocks to hold the vehicle for safety.
1 CHECK BRAKE FLUID
(a) Release the parking brake pedal.
(b) Check that the brake fluid level is proper.
NG ADD BRAKE FLUID
OK
2 CHECK DTC FOR ABS
(a) Are the DTC recorded? (see page 05-765)
NO Go to step 3
YES
REPAIR CIRCUIT INDICATED BY OUTPUT CODE
3 INSPECT BRAKE WARNING LIGHT
WHEN USING HAND-HELD TESTER:
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the item ºBRAKE WARN LIGHTº in the ACTIVE TEST and operate the BRAKE warning light
on the hand-held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
BRAKE WRN LIGHTTurns BRAKE warning light ON / OFFObserve combination me-
ter
(d) Check that ºONº and ºOFFº of the BRAKE warning light are indicated on the combination meter when
using the hand-held tester.
OK:
Turn the BRAKE warning light on or off in accordance with the hand-held tester.
WHEN NOT USING HAND-HELD TESTER:
(a) Turn the ignition switch off and disconnect the connector
from the skid control ECU.
(b) Ground terminal BRL of the skid control ECU.
(c) Turn the ignition switch to the ON position.
(d) Check that the brake warning light.
OK:
Turn the light on or off in accordance with the connec-
tion of terminal BRL and body ground.
NG Go to step 4
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)

G24767
Skid Control ECU
(harness side connector)
S27
WA
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-845
1035 Author
: Date
:
INSPECTION PROCEDURE
1 INSPECT ABS WARNING LIGHT
WHEN USING HAND-HELD TESTER:
(a) Connect the hand-held tester to the DLC3 and start the engine.
(b) Select the item ºABS WARN LIGHTº in the ACTIVE TEST and operate the ABS warning light on the
hand-held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
ABS WARN LIGHTTurns ABS warning light ON / OFFObserve combination me-
ter
(c) Check that ºONº and ºOFFº of the ABS warning light can be shown on the combination meter by the
hand-held tester.
OK:
Turn the ABS warning light ON or OFF in accordance with the hand-held tester.
WHEN NOT USING HAND-HELD TESTER:
(a) Turn the ignition switch off and disconnect the connector
from the skid control ECU.
(b) Ground terminal WA of the skid control ECU.
(c) Turn the ignition switch to the ON position.
(d) Check that the ABS warning light.
OK:
Turn the light ON or OFF in accordance with the con-
necting condition of terminal WA and body ground.
NG CHECK AND REPAIR ABS WARNING LIGHT
CIRCUIT
OK

E72985
Engine Room J/B
Connector Front View:
2I
2I-1
- DIAGNOSTICSLIGHTING SYSTEM
05-1569
1759 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B