TOYOTA HIGHLANDER 2001 Service Repair Manual

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In order to be effective, the SRS airbags must deploy with
tremendous speed. The rapid deployment of the SRS air-
bags makes the SRS airbags themselves potential sources
of serious injury if an occupant is too close to an airbag,
or if an object or some part of his or her body has been
placed between the occupant and the airbag at the time of
deployment. This is just one example of how the instruc-
tions in Section 1- 3 of this Owner 's Manual will help en-
sure proper use of the occupant restraint systems, and
increase the safety they can provide to you and your fami-
ly in the event of an accident.
Toyota recommends you to read the provisions in Section
1- 3 carefully and refer to them as needed during your time
of ownership of this vehicle.Event data recorder
Your vehicle has computers that monitor and control cer-
tain aspects of your vehicle. These computers assist in
driving and maintaining optimal vehicle performance. Be-
sides storing data useful for troubleshooting, there is a
system to record data in a crash or a near car crash
event. This is called an Event Data Recorder (EDR).
The SRS airbag sensor assembly contains the EDR. In a
crash or a near car crash event, this device records some
or all of the following information:

Engine speed

Whether the brake pedal was applied or not

Vehicle speed

To what extent the accelerator pedal was depressed

Position of the transmission selector lever

Whether the driver and front passenger wore the seat
belts or not

Driver 's seat position

Front passenger 's occupant classification

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SRS airbag deployment data

SRS airbag system diagnostic data
The information above is intended to be used for the
purpose of improving vehicle safety performance. Unlike
general data recorders, the EDR does not record sound
data such as conversation between passengers.
Toyota will not disclose the data recorded in an EDR to a
third party except when:

An agreement from the vehicle's owner (or the leas-
ing company for a leased vehicle) is obtained

Officially requested by the police or other authorities

Used as a defense for Toyota in a law suit

Ordered by the courtHowever, if necessary Toyota will:

Use the data for research on Toyota vehicle safety
performance

Disclose the data to a third party for research pur-
poses without disclosing details of the vehicle owner,
and only when it is deemed necessary

Disclose summarized data cleared of vehicle identifi-
cation information to a non- Toyota organization for
research purposes
New vehicle warranty
Your new vehicle is covered by the following Toyota limited
warranties:

New vehicle warranty

Emission control systems warranty

Others
For further information, please refer to the Owner's
Warranty Information Bookletº or Owner 's Manual
Supplementº.

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Your responsibility for
maintenance
It is the owner 's responsibility to make sure that the
specified maintenance is performed. Section 6 gives
details of these maintenance requirements. Also included
in Section 6 is general maintenance. For scheduled
maintenance information, please refer to the Scheduled
Maintenance Guideº or Owner 's Manual Supplementº.
Important health and safety
information about your Toyota
CAUTION

WARNING: Engine exhaust, some of its constitu-
ents, and a wide variety of automobile compo-
nents contain or emit chemicals known to the
State of California to cause cancer and birth de-
fects and other reproductive harm. In addition,
oils, fuels and fluids contained in vehicles as
well as waste produced by component wear con-
tain or emit chemicals known to the State of
California to cause cancer and birth defects or
other reproductive harm.

Battery posts, terminals and related accessories
contain lead and lead compounds. Wash your
hands after handling. Used engine oil contains
chemicals that have caused cancer in laboratory
animals. Always protect your skin by washing
thoroughly with soap and water.

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Accessories, spare parts and
modification of your Toyota
A wide variety of non- genuine spare parts and accessories
for Toyota vehicles are currently available in the market.
You should know that Toyota does not warrant these prod-
ucts and is not responsible for their performance, repair, or
replacement, or for any damage they may cause to, or
adverse effect they may have on, your Toyota vehicle.
This vehicle should not be modified with non- genuine
Toyota products. Modification with non- genuine Toyota
products could affect its performance, safety or durability,
and may even violate governmental regulations. In addi-
tion, damage or performance problems resulting from the
modification may not be covered under warranty.
Spark ignition system of your
To y o t a
The spark ignition system in your Toyota meets all require-
ments of the Canadian Interference- Causing Equipment
Standard.
Installation of a mobile
two- way radio system
As the installation of a mobile two- way radio system in
your vehicle could affect electronic systems such as multi-
port fuel injection system/sequential multiport fuel injection
system, electronic throttle control system, cruise control
system, anti- lock brake system, traction control system,
vehicle stability control system, SRS airbag system and
seat belt pretensioner system, be sure to check with your
Toyota dealer for precautionary measures or special in-
structions regarding installation.

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Tires and loading on your
To y o t a
Underinflated or overinflated tire pressure and the
excess load may result in the deterioration of
steering ability and braking ability, leading to an
accident. Check the tire inflation pressure periodi-
cally and be sure to keep the load limits given in
this Owner 's Manual. For details about tire inflation
pressure and load limits, see pages 385 and 312.
Scrapping of your Toyota
The SRS airbag and seat belt pretensioner devices in your
Toyota contain explosive chemicals. If the vehicle is
scrapped with the airbags and pretensioners left as they
are, this may cause an accident such as fire. Be sure to
have the systems of the SRS airbag and seat belt preten-
sioner removed and disposed of by the qualified service
shop or by your Toyota dealer before you dispose of your
vehicle.

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On- pavement and off- road
driving tips
This vehicle belongs to the utility vehicle class. Utility ve-
hicles have a significantly higher rollover rate than other
types of vehicles. This vehicle will handle and maneuver
differently from an ordinary passenger car because it is
designed for off- road use also. In addition, this vehicle
has a higher ground clearance and center of gravity than
that of an ordinary passenger car. This vehicle design fea-
ture causes this type of vehicle to be more likely to rol-
lover. Failure to operate this vehicle correctly may result in
loss of control, accidents or vehicle rollover causing death
or serious injury. Be sure to read Off- road vehicle precau-
tionsº on page 290 in Section 2 and Off- road driving pre-
cautionsº on page 320 in Section 3.
Leak detection pump
(2AZ- FE engine)
This pump performs fuel evaporation leakage check. This
check is done approximately five hours after the engine is
turned off. So you may hear sound coming from under-
neath the luggage compartment for several minutes. It
does not indicate a malfunction.

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ELECTRICAL WIRING DIAGRAM
Section Code Page
INTRODUCTION A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HOW TO USE THIS MANUAL B. . . . . . . . . . . . . . . . . .
3
TROUBLESHOOTING C. . . . . . . . . . . . . . . . . . . . . . . . .
12
ABBREVIATIONS D. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
GLOSSARY OF TERMS AND SYMBOLS E. . . . . . . .
18
RELAY LOCATIONS F. . . . . . . . . . . . . . . . . . . . . . . . . . .
20
ELECTRICAL WIRING ROUTING G. . . . . . . . . . . . . . .
38
SYSTEM CIRCUITS H. . . . . . . . . . . . . . . . . . . . . . . . . . .
60
GROUND POINT I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
314
POWER SOURCE (Current Flow Chart) J. . . . . . . . .
322
CONNECTOR LIST K. . . . . . . . . . . . . . . . . . . . . . . . . . . .
330
PART NUMBER OF CONNECTORS L. . . . . . . . . . . . .
342
OVERALL ELECTRICAL WIRING DIAGRAM M. . . . .
346

100FT-04
321 4 5
-20
020 40 60
80100 0.1 0.2 0.3 0.51 235 1020 30
Temperature
C (
F)
Resistance kW
(-4) (32) (68) (140)(104) (212)(176)
Air
E2
THAVG
E2G+B
A93068
12
Valve
A50377
- ENGINE CONTROL SYSTEMSFI SYSTEM (3MZ-FE)
10-13
2371 Author
: Date
:
INSPECTION
1. INSPECT MASS AIR FLOW METER
(a) Check the output voltage.
(1) Apply battery voltage across terminals 1 (+B) and 2
(E2G).
(2) Connect the positive (+) tester probe to terminal
VG, and negative (-) tester probe to terminal E2G.
(3) Blow air into the Mass Air Flow (MAF) meter, and
check that the voltage fluctuates.
(b) Measure the resistance between terminals 4 (THA) and
5 (E2).
Standard:
ConditionSpecified Condition
-20
C (-4
F)13.6 to 18.4 kW
20
C (68
F)2.21 to 2.69 kW
60
C (140
F)0.493 to 0.667 kW
If the result is not as specified, replace the MAF meter.
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE
ASSY
(a) Measure the resistance between the terminals.
Standard: 6.9 to 7.9 W at 20
C (68
F)
If the result is not as specified, replace the OCV assy.
(b) Connect the battery's positive (+) lead to terminal 1 and
negative (-) lead to terminal 2, and check the movement
of the valve.
NOTICE:
Confirm that the valve moves freely and does not become
stuck in any position.
If necessary, replace the OCV assy.
HINT:
If the valve cannot return properly because of foreign matter, a
small pressure leak in the advanced direction may occur and a
DTC will be output.

1 2 3 4 5 6
A75258
M- M+ VTA VC VTA2 E2
Temperature
C (
F)
Resistance kW
30
20
10
5
2
1
0.5
0.3
0.2
0.13
-20 0 20 40 60 80 100
(-4)(32) (68) (140)(104) (212)
(176)
A91320
A65174
10-14
- ENGINE CONTROL SYSTEMSFI SYSTEM (3MZ-FE)
2372 Author
: Date
:
3. INSPECT ACCELERATOR PEDAL ROD ASSY
(a) Check the acceletor pedal position sensor (see page 05-469).
4. INSPECT THROTTLE BODY ASSY
(a) Check the throttle position sensor (see page 05-469).
(b) Check the throttle control motor.
(1) Measure the resistance between terminals 2 (M+)
and 1 (M-).
Resistance: 0.3 to 100 W at 20
C (68
F).
If the result is not as specified, replace the throttle body assy.
5. INSPECT ENGINE COOLANT TEMPERATURE
SENSOR
(a) Measure the resistance between each terminal.
Standard:
ConditionSpecified Condition
20
C (68
F)2.32 to 2.59 kW
80
C (176
F)0.310 to 0.326 kW
If the result is not as specified, replace the sensor.
NOTICE:
If checking the ECT sensor in the water, keep the terminals
dry. After the check, wipe the sensor dry.
6. INSPECT KNOCK SENSOR
(a) Measure the resistance between the terminals.
Resistance: 120 to 280 kW at 20
C (68
F)
If the result is not as specified, replace the sensor.