2001 TOYOTA HIGHLANDER warning

2005 HIGHLANDER (EWD592U)
8
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.
5
5
5
5
4
44
4
4 BA15IB18EA2
ID115
IC33 IA12 E 3
W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B
W-B
W-B W-B
W-B
W-B W-B W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
BR
W-B
BR BRW-BW-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
W-B W-B
W-B
W-B
BR W-B
BR BR
BR W-B (4A-GZE)
W-B W-BI 2
I 2
B 5 I 5 I 5 I 5
B 5
B 5
B 5
I 5
I 5
I 3 I 3 E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6 E 4 E 4
B 4
EA I 4
B 4
B 4
I 4 I 8
IB IC 443E5
3E6 3G13 3F3 3D1 3B7W-B
W-B
W-B W-B W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B W-BI 6
I 6
I 2 3C7
10A A A A
A
A
Junction
Connector J 1
W-B
W-B
W-B W-B
BR W-B W-B
W-B
W-B W-B
W-B
I GROUND POINT
FAN MAIN Relay
FAN MAIN Relay
A/C Relay No.2
A/C Relay No.3
Radiator Fan Motor
Headlight Cleaner Relay
Headlight LH
Headlight RH
Front Fog Light LH
Brake Fluid Level SW Front Fog Light RH Front Turn Signal Light RH
Front Clearance Light RH
Front Turn Signal Light LH
Front Clearance Light LH
Door Lock Control SW
Door Courtesy SW RH
Door Lock Motor RH
Door Lock Control Relay
Blower Resistor
Idle-Up SW
A/C Amplifier
Radio and Player
HEATER Relay
Auto Antenna MotorA/C Control Assembly
Blower Motor
Blower SW
Parking Brake SW
Combination Meter
Combination SW
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
Defogger SW
Unlock Warning SW
Power Window Master SW
Power Window Control
Relay
Door Courtesy SW LH
Door Lock Control SW
Door Lock Motor LH
Fuel Control SW
Woofer Speaker Amplifier
Combination Meter
Combination Meter
Fuel Sender Cigarette Lighter
O/D Main SW
Clock
Combination SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

2005 HIGHLANDER (EWD592U)
9
B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
ACC
S 26
652
22
Battery30A AM2
StarterShort Pin
100A ALT Fusible Link Block
60A ABS10A ECU-B
7.5A DOME
15A EFI
10A HAZARD
20A RADIO NO.1
10A HORN
20A
10AFusePage
214
230
11 2
122 194
187
180
166
210 ABS
Cigarette Lighter
Combination Meter
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Theft Deterrent and Door Lock ControlABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System STOPSystem
DOMEHeadlight
Interior Light
3 EA2 1 EA1E 6
E 7
E 7
2
2
2
2 2
2 2
2 INJECTION Relay
STARTER Relay B
B
B B-O
1
1 2
23
4
3
4W-B W-B
B-W
B-W E 7
E 7B
BW1.25B FL MAIN
50A MAIN
7.5A AM2
15A HAZ-RADIO 2
22
2
2W
WEB1
EB17
6
W-RI 2 I 2 I 2
WW
W W W
1 1
1 140A DOOR LOCK CB
7.5A DOME 1W-L
R 1
1
2
431
1 1
1
111 G
G
W-R 15A TAIL
20A DEFOG
B-Y 84
32Ignition SW I 8
B-Y
11P-L Battery
15A RAD CIG2
TAIL
Relay
Power Source J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 20)
2
W W
B B B B B
W-R
WW W
G-WAM2
AM1 IG2
IG1W
W
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

'05 HIGHLANDER_U (L/O 0409)
ii
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
Important information about this manual
Safety and vehicle damage warnings
Throughout this manual, you will see safety and vehicle dam-
age warnings. You must follow these warnings carefully to
avoid possible injury or damage.
The types of warnings, what they look like, and how they are
used in this manual are explained as follows:
CAUTION
This is a warning against anything which may cause
injury to people if the warning is ignored. You are
informed about what you must or must not do in
order to reduce the risk of injury to yourself and
others.
NOTICE
This is a warning against anything which may cause
damage to the vehicle or its equipment if the warning
is ignored. You are informed about what you must or
must not do in order to avoid or reduce the risk of
damage to your vehicle and its equipment.
Safety symbol
When you see the safety symbol
shown above, it means: Do not...º;
Do not do thisº; or Do not let this
happenº.

'05 HIGHLANDER_U (L/O 0409)
vi
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
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.

010QL-02
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01-25
25 Author
: Date
:
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
A large number of ECU controlled systems are used in the HIGHLANDER. In general, ECU controlled sys-
tems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. How-
ever, most problem checking procedures only involve inspecting the ECU controlled system's circuits one
by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform
effective troubleshooting, accurate diagnoses and necessary repairs. Detailed information and trouble-
shooting procedures on major ECU controlled systems in this vehicle are outlined below:
SystemSee Page
1. SFI System (2AZ-FE)05-1
2. SFI System (3MZ-FE)05-362
3. Tire Pressure Warning System05-729
4. ABS with EBD & BA & TRAC & VSC System05-761
5. Electronic Controlled Automatic Transaxle [ECT] (U241E/U140F)05-876
6. Electronic Controlled Automatic Transaxle [ECT] (U151E/U151F)05-986
7. Air Conditioning System05-1 114
8. Supplement Restraint System05-1 194
9. Lighting System05-1526
10. Audio System05-161 1
11. Rear Seat Entertaiment System05-1690
12. Navigation System05-1749
13. Combination Meter05-1868
14. Power Window Control System05-1901
15. Power Door Lock Control System05-1934
16. Wireless Door Lock Control System05-1960
17. Sliding Roof System05-1974
18. Engine Immobiliser System05-1985
19. Theft Deterrent System05-2012
20. Multiplex Communication System05-2040
21. CAN Communication System05-2090
22. Cruise Control System05-2136
FOR USING OBD II SCAN TOOL OR HAND-HELD TESTER

Before using the scan tool or tester, the scan tool's instruction book or tester's operator manual should
be read thoroughly.

If the scan tool or tester cannot communicate with the ECU controlled systems when you have con-
nected the cable of the tester to the DLC3 with the ignition switch and tester turned ON, there is a prob-
lem on the vehicle side or tester side.
(1) If communication is normal when the tester is connected to another vehicle, inspect the diagnosis
data link line (Bus
line) or ECU power circuit of the vehicle.
(2) If communication is still impossible when the tester is connected to another vehicle, the problem
is probably in the tester itself. So perform the Self Test procedures outlined in the Tester Opera-
tor 's Manual.

Illustration:
what to do and where
Component part No. Detailed text: how to perform task
Task heading: what you will be doing
Set part No.
INSTALL FRONT AXLE HUB BEARING
D31332
B80366
01-2
- INTRODUCTIONHOW TO USE THIS MANUAL
2 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(c) Torque specifications, grease application areas, and non-reusable parts are emphasized in the proce-
dures.
NOTICE:
There are cases where such information can only be explained by using an illustration. In these
cases, all the information such as torque, oil, etc. are described in the illustration.
(d) The installation procedures are the removal procedures in reverse order. However, only installation
procedures requiring additional information are included.
(e) Only items with key points are described in the text. What to do and other details are placed in illustra-
tions next to the text. Both the text and illustrations are accompanied by standard values and notices.
(f) Illustrations of similar vehicle models are sometimes used. In those cases, specific details may be dif-
ferent from the actual vehicle.
(g) Procedures are presented in a step-by-step format:
(1) The illustration shows what to do and where to do it.
(2) The task heading tells what to do.
(3) The explanation text tells how to perform the task. It also has information such as specifications
and warnings.
Example:
HINT:
This format provides an experienced technician with a FAST TRACK to the necessary information. The task
headings are easy to read and the text below the task heading provides detailed information. Important spec-
ifications and warnings are always written in bold type.
5. SERVICE SPECIFICATIONS
(a) SPECIFICATIONS are presented in bold-faced text throughout the manual. The specifications are
also found in the Service Specifications section for quick reference.
6. TERMS DEFINITION
CAUTIONPossibility of injury to you or other people.
NOTICEPossibility of damage to the components being repaired.
HINTProvides additional information to help you perform repairs.

01-10
- INTRODUCTIONREPAIR INSTRUCTION
10 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONER
HINT:
The HIGHLANDER is equipped with a Supplemental Restraint System (SRS) and seat belt pretensioner.
Failure to carry out the service operations in the correct sequence could cause the SRS to unexpectedly
deploy during servicing and lead to serious injury.
Furthermore, if a mistake is made when servicing the SRS, it is possible that the SRS may fail to operate
properly. Before servicing (including removal or installation of parts, inspection or replacement), be sure to
read the following section carefully.
(a) GENERAL NOTICE
(1) Malfunction symptoms of the SRS are difficult to confirm so the Diagnostic Trouble Codes (DTCs)
become the most important source of information when troubleshooting. When troubleshooting
the SRS, always check the DTCs before disconnecting the battery (see page 05-1215).
(2) To avoid serious injury, servicing the SRS must be started at least 90 seconds after:

The ignition switch is turned to the LOCK position.

The negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source. If work is started within 90 seconds of dis-
connecting the negative (-) terminal cable from the battery, the SRS may deploy.)
Disconnecting the negative (-) terminal cable will erase the memory of all vehicle systems. Initial-
ize the systems after disconnecting/reconnecting the cable.
CAUTION:
Never use a back-up power source (battery or other) in an attempt to avoid erasing system memory.
The back-up power source inadvertently may inadvertently power the SRS and cause it to deploy.
(3) In minor collisions where the SRS does not deploy, the horn button assembly, instrument panel
passenger airbag assembly, front seat airbag assembly, curtain shield airbag assembly and seat
belt pretensioner should be inspected before further use of the vehicle (see pages 60-19,
60-31, 60-40, 60-46, and 61-8).
(4) Never use SRS parts from another vehicle. When replacing parts, use new parts.
(5) Before repairs, remove the airbag sensor if impacts are likely to be applied to the sensor during
repairs.
(6) Never disassemble and repair the airbag sensor assembly, horn button assembly, instrument
panel passenger airbag assembly, front seat airbag assembly, curtain shield airbag assembly
or seat belt pretensioner.
(7) Replace the center airbag sensor assembly, side airbag sensor assembly, horn button assembly
or the instrument panel passenger airbag assembly, front seat airbag assembly or curtain shield
airbag assembly if: 1) damage has occurred from being dropped, or 2) cracks, dents or other
defects in the case, bracket or connector are present.
(8) Do not directly expose the airbag sensor assembly, the horn button assembly, the instrument
panel passenger airbag assembly, front seat airbag assembly, the curtain shield airbag assem-
bly or the seat belt pretensioner to hot air or flames.
(9) Use a voltmeter/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting electri-
cal circuits.
(10) Information labels are attached to the SRS components. Follow the instructions on the labels.
(11) After work on the SRS is completed, check the SRS warning light (see page 05-1207).

A82779
DLC3
1314 1516 12 11 10 9 12345678
TS
CG
- INTRODUCTIONREPAIR INSTRUCTION
01-17
17 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7. FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYSTEM
(a) When testing with a 2-wheel drum tester such as a speedometer tester, a combination tester of the
speedometer and brake, a chassis dynamometer, or when jacking up the front wheels and driving the
wheels, always turn the TRAC system OFF beforehand via the TRAC OFF switch before testing.
NOTICE:
TRAC system OFF condition can be confirmed by the ºTRAC OFFº warning indicator light in the com-
bination meter.
8. FOR VEHICLES EQUIPPED WITH VEHICLE SKID
CONTROL (VSC) SYSTEM
(a) NOTICES WHEN USING DRUM TESTER
(1) Before beginning testing, disable the Vehicle Skid
Control system (VSC). To disable the VSC, turn the
ignition switch OFF and connect SST to terminals
TS and CG of DLC3.
SST 09843-18040
NOTICE:

Confirm that the VSC warning light blinks.

VSC system will be reset when the engine is re-
started.

For safety, secure the vehicle with restraint chains
while using a wheel dynamometer.
(b) NOTICES OF RELATED OPERATIONS TO VSC
(1) Do not carry out unnecessary installation and re-
moval as it might affect the adjustment of VSC re-
lated parts.
(2) Be sure to follow the instructions for work prepara-
tion and final confirmation of proper operation of the
VSC system.