gas type TOYOTA HIGHLANDER 2001 Service Repair Manual

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Always slow down in gusty cross-
winds. Because of its profile and
higher center of gravity, your ve-
hicle is more sensitive to side
winds than an ordinary passenger
car. Slowing down will allow you to
have better control.

When driving off- road or in rugged
terrain, do not drive at excessive
speeds, jump, make sharp turns,
strike objects, etc. This may cause
loss of control or vehicle rollover
causing death or serious injury. You
are also risking expensive damage
to your vehicle's suspension and
chassis.

Do not drive horizontally across
steep slopes. Driving straight up or
straight down is preferred. Your ve-
hicle (or any similar off- road ve-
hicle) can tip over sideways much
more easily than forward or back-
ward.
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
break- in. But following a few simple tips
for the first 1600 km (1000 miles) can add
to the future economy and long life of
your vehicle:

Avoid full throttle acceleration when
starting and driving.

Avoid racing the engine.

Try to avoid hard stops during the first
300 km (200 miles).

Do not drive for a long time at any
single speed, either fast or slow.

Do not tow a trailer during the first 800
km (500 miles).FUEL TYPE
Your new vehicle must use only un-
leaded gasoline.
To help prevent gas station mix- ups, your
Toyota has a smaller fuel tank opening.
The special nozzle on pumps with un-
leaded fuel will fit it, but the larger stan-
dard nozzle on pumps with leaded gas will
not.
At a minimum, the gasoline you use
should meet the specifications of ASTM
D4814 in the U.S.A. and CGSB 3.5- M93
in Canada.NOTICE
Do not use leaded gasoline. Use of
leaded gasoline will cause the three-
way catalytic converter to lose its ef-
fectiveness and the emission control
system to function improperly. Also,
this can increase maintenance costs.
Break- in period Fuel

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OCTANE RATING
2AZ- FE engine: Select Octane Rating 87
(Research Octane Number 91) or higher.
3MZ- FE engine: Select Octane Rating
87 (Research Octane Number 91) or
higher. For improved vehicle perfor-
mance, the use of premium unleaded
gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher
is recommended.
Use of unleaded gasoline with an octane
rating or research octane number lower
than stated above will cause persistent
heavy knocking. If it is severe, this will
lead to engine damage.
If your engine knocks...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, occasionally, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is normal
and there is no need for concern.GASOLINE CONTAINING DETERGENT
ADDITIVES
Toyota recommends the use of gasoline
that contains detergent additives to
avoid build- up of engine deposits.
However, all gasoline sold in the U.S.
contains detergent additives to keep clean
and/or clean intake systems.
QUALITY GASOLINE
Automotive manufacturers in the U.S.,
Europe and Japan have developed a
specification for quality fuel named
World- Wide Fuel Charter (WWFC) that
is expected to be applied world wide.
The WWFC consists of four categories
that depend on required emission lev-
els. In the U.S., category 3 or 4 has
been adopted. The WWFC improves air
quality by providing for better emis-
sions in vehicle fleets, and customer
satisfaction through better vehicle per-
formance.CLEANER BURNING GASOLINE
Cleaner burning gasoline, including re-
formulated gasoline that contains oxy-
genates such as ethanol or MTBE is
available in many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide excellent vehicle perfor-
mance, reduce vehicle emissions, and im-
prove air quality.
OXYGENATES IN GASOLINE
Toyota allows the use of oxygenate
blended gasoline where the oxygenate
content is up to 10% ethanol or 15%
MTBE. If you use gasohol in your
Toyota, be sure that it has an octane
rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.

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Aluminum wheels: Use only a mild soap
or neutral detergent.
Plastic bumpers: Wash carefully. Do not
scrub with abrasive cleaners. The bumper
faces are soft.
Road tar: Remove with turpentine or
cleaners that are marked safe for painted
surfaces.
NOTICE
Do not use organic substances (gaso-
line, kerosene, benzine or strong sol-
vents), which may be toxic or cause
damage.
3. Rinse thoroughlyÐdried soap can
cause streaking. In hot weather you
may need to rinse each section right
after you wash it.
4. To prevent water spots, dry the vehicle
using a clean soft cotton towel. Do not
rub or press hardÐyou might scratch
the paint.Automatic car wash
Your vehicle may be washed in an auto-
matic car wash, but remember that the
paint can be scratched by some type of
brushes, unfiltered washing water, or the
washing process itself. Scratching reduces
paint durability and gloss, especially on
darker colors. The manager of the car
wash should be able to advise you wheth-
er the process is safe for the paint on
your vehicle.
NOTICE
With mast type antenna:
To prevent damage to the antenna,
make sure it is removed before driv-
ing your Toyota through an automatic
car wash.
Waxing your Toyota
Polishing and waxing is recommended
to maintain the original beauty of your
Toyota's finish.
Once a month or if the vehicle surface
does not repel water well, apply wax.
1. Always wash and dry the vehicle be-
fore you begin waxing, even if you are
using a combined cleaner and wax.
2. Use a good quality polish and wax. If
the finish has become extremely weath-
ered, use a car- cleaning polish, fol-
lowed by a separate wax. Carefully fol-
low the manufacturer 's instructions and
precautions. Be sure to polish and wax
the chrome trim as well as the paint.
Windshield washer nozzles: Make sure
that the nozzles do not become blocked
when waxing. If a nozzle becomes
blocked, contact your Toyota dealer to
have the vehicle serviced.
NOTICE
If a nozzle becomes blocked, do not
try to clear it with a pin or other
object. The nozzle will be damaged.

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3. Wax the vehicle again when water
does not bead but remains on the sur-
face in large patches.
NOTICE
Always remove the plastic bumpers if
your vehicle is re- painted and placed
in a high heat paint waxing booth.
High temperatures could damage the
bumpers.
CAUTION

Vehicles with side airbags and cur-
tain shield airbags:
Be careful not to splash water or
spill liquid on the floor. This may
prevent the side airbag and curtain
shield airbag from activating cor-
rectly, resulting in serious injury.

Do not wash the vehicle floor with
water, or allow water to get onto
the floor when cleaning the vehicle
interior or exterior. Water may get
into audio components or other
electrical components above or un-
der the floor carpet (or mat) and
cause a malfunction; and it may
cause body corrosion.
Vinyl interior
The vinyl upholstery may be easily
cleaned with a mild soap or detergent
and water.
First vacuum over the upholstery to re-
move loose dirt. Then, using a sponge or
soft cloth, apply the soap solution to the
vinyl. After allowing it to soak in for a few
minutes to loosen the dirt, remove the dirt
and wipe off the soap with a clean damp
cloth. If all the dirt do not come off, re-
peat the procedure. Commercial foaming-
type vinyl cleaners are also available
which work well. Follow the manufacturer 's
instructions.
NOTICE
Do not use solvent, thinner, gasoline
or window cleaner on the interior.
Cleaning the interior

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Carpets
Use a good foam- type shampoo to
clean the carpets.
Begin by vacuuming thoroughly to remove
as much dirt as possible. Several types of
foam cleaners are available; some are in
aerosol cans and others are powders or
liquids which you mix with water to pro-
duce a foam. To shampoo the carpets,
use a sponge or brush to apply the foam.
Rub in overlapping circles.
Do not apply waterÐthe best results are
obtained by keeping the carpet as dry as
possible. Read the shampoo instructions
and follow them closely.
Seat belts
The seat belts may be cleaned with
mild soap and water or with lukewarm
water.
Use a cloth or sponge. As you are clean-
ing, check the belts for excessive wear,
fraying, or cuts.
NOTICE

Do not use dye or bleach on the
belts
Ðit may weaken them.

Do not use the belts until they be-
come dry.
Windows
The windows may be cleaned with any
household window cleaner.
NOTICE
When cleaning the inside of the rear
window, be careful not to scratch or
damage the heater wires or connec-
tors.
Air conditioning control panel, audio
panel, instrument panel, console panel,
and switches
Use a soft damp cloth for cleaning.
Soak a clean soft cloth in water or luke-
warm water then lightly wipe off dirt.
NOTICE

Do not use organic substances (sol-
vents, kerosene, alcohol, gasoline,
etc.) or alkaline or acidic solutions.
These chemicals can cause discol-
oring, staining or peeling of the
surface.

If you use cleaners or polishing
agents, make sure their ingredients
do not include the substances men-
tioned above.

If you use a liquid car freshener, do
not apply the liquid onto the ve-
hicle's interior surfaces. It may con-
tain the ingredients mentioned
above. Immediately clean any spill
using the method mentioned above.
Leather Interior
The leather upholstery may be cleaned
with neutral detergent for wool.
Remove dirt using a soft cloth dampened
with 5% solution of neutral detergent for
wool. Then thoroughly wipe off all traces
of detergent with a clean damp cloth.
After cleaning or whenever any part of the
leather gets wet, dry with a soft clean
cloth. Allow the leather to dry in a venti-
lated shaded area.

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Model:
2AZ- FE and 3MZ- FE
Type:
2AZ- FE engine
4 cylinder in line, 4 cycle, gasoline
3MZ- FE engine
6 cylinder V type 4 cycle, gasoline
Bore and stroke, mm (in.):
2AZ- FE engine
88.5
96.0 (3.48
3.78)
3MZ- FE engine
92.0
83.0 (3.62
3.27)
Displacement, cm
3 (cu. in.):
2AZ- FE engine
2362 (144.1)
3MZ- FE engine
3311 (202.1)
Dimensions and weights
Overall length mm (in.)
Overall width mm (in.)
Overall height
*
1mm (in.)
Wheelbase mm (in.)
Front tread mm (in.)
Rear tread mm (in.)
Vehicle capacity
weight (occupants
+ luggage) kg (lb.)Two- wheel drive models Four- wheel drive models
4690 (184.6)
4690 (184.6)
1825 (71.9) 1825 (71.9)
1690 (66.5)
*
2
1745 (68.7)*
3
2715 (106.9) 2715 (106.9)
1580 (62.2) 1575 (62.0)
1565 (61.6) 1555 (61.2)
390 (860)
*
4
526 (1159)*
5390 (860)*
4
526 (1159)*
5
*
1
: Unladen vehicle*
2: Without roof rails*
3: With roof rails*
4: Without third seat*
5: With third seat*
6: 2AZ- FE engine*
7: 3MZ- FE engine*
8: Without towing package*
9: With towing package1680 (66.1)
*
2
1735 (68.3)*
3
Towing capacity
(trailer weight +
cargo weight) kg (lb.)680 (1500)*
6, 8
1360 (3000)*
6, 9
907 (2000)*
7, 8
1585 (3500)*
7, 9
680 (1500)*
6, 8
1360 (3000)*
6, 9
907 (2000)*
7, 8
1585 (3500)*
7, 9
Engine

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Fuel type:
2AZ- FE engine
Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or
higher
3MZ- FE engine
Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or
higher. For improved vehicle perfor-
mance, the use of premium unleaded
gasoline with an Octane Rating of 91
(Research Octane Number 96) or
higher is recommended.
Fuel tank capacity, L (gal., Imp. gal.):
72.5 (19.1, 16.0)ENGINE
Valve clearance (engine cold), mm (in.):
2AZ- FE engine
Intake 0.19Ð0.29 (0.007Ð0.011)
Exhaust 0.30Ð0.40 (0.012Ð0.016)
3MZ- FE engine
Intake 0.15Ð0.25 (0.006Ð0.010)
Exhaust 0.25Ð0.35 (0.010Ð0.014)
Spark plug type:
DENSO SK20R11
NGK IFR6A11
Spark plug gap, mm(in.):
1.1 (0.043)
Drive belt tension measured with
Borroughs drive belt tension gauge
No.BT- 33- 73F (used belt), Ibf:
2AZ- FE engine
Automatic adjustment
3MZ- FE engine
12510ENGINE LUBRICATION
Oil capacity (drain and refill), L (qt., Imp.
qt.):
2AZ- FE engine
With filter 3.8 (4.0, 3.3)
Without filter 3.6 (3.8, 3.2)
3MZ- FE engine
With filter 4.7 (5.0, 4.1)
Without filter 4.5 (4.8, 4.0)
Toyota Genuine Motor Oilº is used in
your Toyota vehicle. Use Toyota approved
Toyota Genuine Motor Oilº or equivalent
to satisfy the following grade and
viscosity.
Oil grade:
API grade SL Energy- Conservingº or
ILSAC multigrade engine oil
Fuel Service specifications

Explanation of Maintenance Items
38
Engine Valve Clearance
Inspect for excessive lifter noise and engine vibration and adjust if necessary.
A qualified technician should perform this operation.
Exhaust Pipes and Mountings
Visually inspect the exhaust pipes, muffler and hangers for cracks, deterioration
and damage. Start the engine and listen carefully for any exhaust gas leakage.
Tighten connections or replace parts as necessary.
Fuel Lines and Connections, Fuel Tank Band and
Fuel Tank Vapor Vent System Hoses
Visually inspect for corrosion, damage, cracks and loose or leaking connections.
Tighten connections or replace parts as necessary.
Fuel Tank Cap Gasket
Visually inspect for cracks, deterioration and damage and replace if necessary.
Nuts and Bolts on Chassis and Body
Retighten the seatmounting bolts and front/rear suspension member retaining
bolts to specified torque.
Propeller Shaft
Lubricate the propeller shaft spiders and slide yokes with lithiumbase chassis grease
and the double cardan joint with molybdenumdisulfide lithiumbase chassis grease,
and retorque the bolt. Only a qualified technician should retorque the bolt.
Radiator Core and Condenser
Inspect for debris and signs of damage. Have any problem repaired immediately
by a qualified technician.
Spark Plugs
Replace at specified intervals. Install new plugs of the same type as originally
equipped. A qualified technician should perform this operation.
Steering Gear Box
Inspect for signs of leakage. If you discover any leakage, have it repaired imme
diately by a qualified technician.

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NOTICE
Do not use engine antifreeze or any
other substitute because it may dam-
age your vehicle's paint.
The following illustrations show how to
gain access to the bulbs. When replacing
a bulb, make sure the ignition switch and
light switch are off. Use bulbs with the
wattage ratings given in the table.
CAUTION

To prevent burning yourself, do not
replace the light bulbs while they
are hot.

Halogen bulbs have pressurized gas
inside and require special handling.
They can burst or shatter if
scratched or dropped. Hold a bulb
only by its plastic or metal case.
Do not touch the glass part of a
bulb with bare hands.
NOTICE
Only use a bulb of the listed type.
The inside of the lens of exterior lights
such as headlights may temporarily fog up
when the lens becomes wet in the rain or
in a car wash. This is not a problem
because the fogging is caused by the
temperature difference between the outside
and inside of the lens, just like the
windshield fogs up in the rain. However, if
there is a large drop of water on the
inside of the lens, or if there is water
pooled inside the light, contact your
Toyota dealer.
Replacing light bulbsÐ

A73819
AtomosphereSolid Electrolyte
(Zirconia Element)
Platinum
Electrode HeaterExhaust Gas
Cover Element
A
A
ECM Monitored
A/F Sensor Voltage
Air-Fuel Ratio Alumina
A - A Section
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-269
459 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P2195 OXYGEN (A/F) SENSOR SIGNAL STUCK
LEAN (BANK 1 SENSOR 1)
DTC P2196 OXYGEN (A/F) SENSOR SIGNAL STUCK
RICH (BANK 1 SENSOR 1)
HINT:
Although the title (DTC description) says ºoxygen sensorº, this DTC is related to the ºA/F sensorº.
CIRCUIT DESCRIPTION
The Air-Fuel ratio (A/F) sensor provides output voltage* approximately equal to the existing air-fuel ratio.
The A/F sensor output voltage is used to provide feedback for the ECM to control the air-fuel ratio.
With the A/F sensor output, the ECM can determine deviation from the stoichiometric air-fuel ratio and con-
trol proper injection time. If the A/F sensor is malfunctioning, the ECM is unable to accurately control air-fuel
ratio.
The A/F sensor is equipped with a heater which heats the zirconia element. The heater is also controlled
by the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), current flows
to the heater which heats the sensor to facilitate detection of accurate oxygen concentration.
The A/F sensor is a planar type. Compared to a conventional type, the sensor and heater portions are nar-
rower. Because the heat of the heater is conducted through the alumina to zirconia (of the sensor portion),
sensor activation is accelerated.
To obtain a high purification rate of the CO, HC and NOx components of the exhaust gas, a three-way cata-
lytic converter is used. The converter is most efficient when the air-fuel ratio is maintained near the stoichio-
metric air-fuel ratio.
HINT:
*: The voltage value changes on the inside of the ECM only.
05EVX-06