2001 TOYOTA HIGHLANDER navigation system

I38210
05-1788
- DIAGNOSTICSNAVIGATION SYSTEM
1978 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HINT:
If check results of other devices are ºCHEK,º press the ºServiceº
switch to return to the original ºLAN Monitorº screen. Then,
check the individual communication diagnostic screen for the
next device and record the result on the customer problem anal-
ysis check sheet.

H45940
Airbag Sensor
Assy Center
A1724
1
Combination Meter4A5Short Connector
GR
M3
Multi-DisplayBR
IB2IF310A1722
21 IB2
4C2
A11
Body ECU IL2
B9 54F
B10 7
6
6C11 P51
1
2
2S30
S30
S31 S31 9
A10MPX+
MPX-
MPX1
MPX2
MPX1
MPX2
7BR R G V
G
BR SB
O
SB 4 11
7
8G5 Gateway ECU A/C Control Assembly
Passenger Side J/B
V
E6 18
3J 12
3E1 3H5
MPX1
IC YT4 (*1) (*1)12
SW with ECU Power Window Master
GR
V
31
(*3) Center J/B
G
*1: w/ Navigation System
*2: w/o Navigation System
*3: w/ Theft Deterrent System G
(*2)
Y
9
C12 MPX+
MPX-IL21
GR29
E6
20
E5 J16
J/C
Passenger Side J/B
4N1 O
DD
TC
CGD
IF33
TC
4 W-B W-BTheft Deterrent ECUEngine
Control Module 8
O
OP D3
DLC3W MPD1
MPD2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1523
1713 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

N17398
Example:
HeadCapstan
Pinch Roller
BE4331
I39082
Radio Receiver Assy
(Resister 60 to 80 W)Multi-display
controller
Sub-assyAVC-LAN Example:
- DIAGNOSTICSAUDIO SYSTEM
05-1613
1803 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6. MAINTENANCE
Tape Player/Head Cleaning:
(a) Raise the cassette door with your finger.
Using a pencil or similar object, push in the guide.
(b) Using a cleaning pen or cotton applicator soaked in clean-
er, clean the head surface, pinch rollers and capstans.
7. MAINTENANCE
CD Player/Disc Cleaning:
If the disc gets dirty, clean the disc by wiping the surface from
the center to outside in the radial directions with a soft cloth.
NOTICE:
Do not use a conventional record cleaner or anti-static pre-
servative.
8. AVC-LAN Description
(a) What is AVC-LAN?
AVC-LAN, an abbreviation for ºAudio Visual Communication Local Area Networkº, is a united standard
developed by the manufacturers in affiliation with Toyota Motor Corporation. This standard pertains
to audio and visual signals as well as switch and communication signals.
(b) Purpose:
Recently, car audio systems have rapidly developed and the functions vastly changed. The conven-
tional car audio system is being integrated with multi-media interfaces similar to those in navigation
systems. At the same time, customers are demanding higher quality from their audio systems. This
is merely an overview of the standardization background. The specific purposes are as follows.
(1) To solve sound problems, etc. caused by using components of different manufacturers through
signal standardization.
(2) To allow each manufacturer to concentrate on developing products they do best. From this, rea-
sonably priced products can be produced.
HINT:

If a +B or GND short is detected in the AVC-LAN circuit, communication is interrupted and the audio
system will stop functioning.

05-1614
- DIAGNOSTICSAUDIO SYSTEM
1804 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)

If an audio system is equipped with a navigation system, the multi-display unit acts as the master unit.
If the navigation system is not equipped, the audio head unit acts as the master unit instead. If the radio
and navigation assy is equipped, it is the master unit.

The radio receiver assy provides resistance to make communication possible.

The car audio system with an AVC-LAN circuit has a diagnostic function.

Each component has a specified number (3-digit) called a physical address. Each function has a num-
ber (2-digit) called a logical address.
9. Communication system outline
(a) Components of the audio system communicate with each other via the AVC-LAN.
(b) Radio receiver assy has enough resistance (60 to 80 W) necessary for transmitting the communication.
This is essential for communication.
(c) If a short circuit or open circuit occurs in the AVC-LAN circuit, communication is interrupted and the
audio system will stop functioning.
10. Diagnostic function outline
(a) The audio system has a diagnostic function (the result is indicated on the master unit).
(b) A 3-digit hexadecimal component code (physical address) is allocated to each component on the
AVC-LAN. Using this code, the component in the diagnostic function can be displayed.

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.

i
2005 HIGHLANDER Navigation from Aug. '04 Prod. (OM48539U)
Introduction
Thank you for your purchase of the Navigation System. Please read this manual carefully to ensure proper use. Keep this manual
in your vehicle at all times.
The Navigation System is one of the most technologically advanced vehicle accessories ever developed. The system receives satellite signals
from the Global Positioning System (GPS) operated by the U.S. Department of Defense. Using these signals and other vehicle sensors, the
system indicates your present position and assists in locating a desired destination.
The navigation system is designed to select efficient routes from your present starting location to your destination. The system is designed
to direct you to a destination that is unfamiliar to you in an efficient manner. The system uses the maps of DENSO. The calculated routes
may not be the shortest nor the least traffic congested. Your own personal local knowledge or short cutº may at times be faster than the calcu-
lated routes.
The navigation system's database includes about 75 Point of Interest categories to allow you to easily select destinations such as restaurants
and banks. If a destination is not in the database, you can enter the street address or a major intersection close to it and the system will guide
you there. The system will provide both a visual map and audio instructions. The audio instructions will announce the distance remaining
and the direction to turn in approaching a fork or intersection. These voice instructions will help you keep your eyes on the road and are timed
to provide enough time to allow you to maneuver, change lanes or slow down.
Please be aware that all current vehicle navigation systems have certain limitations that may affect their ability to perform properly.
The accuracy of the vehicle's position depends on the satellite condition, road configuration, vehicle condition or other circumstan-
ces. For more information on the limitations of the system, refer to pages 9 through 11.

01-34- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
34 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PROBLEM SYMPTOMS TABLE
The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to
troubleshoot when, during a DTC check, a ºNormalº code is displayed but the problem is still occurring. Num-
bers in the table show the inspection order in which the circuits or parts should be checked.
HINT:
In some cases, the problem is not detected by the diagnostic system even though a problem symptom is
present. It is possible that the problem is occurring outside the detection range of the diagnostic system, or
that the problem is occurring in a completely different system.
Symptom
Suspected AreaSee Page
PROBLEM SYMPTOMS TABLE
05-1277
Problem SymptomPage
Indicates the page where the flow chart for each circuit
is located.
Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for each problem
symptom. Check in the order indicated by the numbers.
Circuit or Part Name
Indicates the circuit or part which needs to be checked.
Inspect the ºFuseº and ºRelayº before confirming the suspected area in the charts below (See page 68-1).
1. SRS warning light circuit (multi-display assy)
1. Steering pad switch circuit
05-1267







HINT:
1. Power source circuit (multi-display assy)
Black screen
2. Multi-display 67-7
Screen cannot be dimmer in night time
2. Multi-display assy 67-7
A navigation system cannot be operated2. AVC-LAN circuit (radio receiver assy-multi-
display assy)
3. Radio receiver assy
4. Multi-display assy05-1 183
05-1303
67-5
67-7

iii
Safety Instruction
To use your system in the safest possible
manner, follow all the safety tips shown be-
low.
This system is intended to assist you in
reaching your destination and, if used prop-
erly, can do so. You, as the driver, are solely
responsible for the safe operation of your ve-
hicle and the safety of your passengers.
Do not use any feature of this system to the
extent it distracts you from safe driving. Your
first priority while driving should always be
the safe operation of your vehicle. While you
are driving, be sure to observe all traffic regu-
lations.Prior to the actual use of this system, learn
how to use it and become thoroughly familiar
with it. Read the entire Navigation System
Owner's Manual to make sure you under-
stand the system. Do not allow others to use
this system until they have read and under-
stood the instructions in this manual.
For your safety, some functions may become
inoperable when you start driving. Unavail-
able switches are dimmed. You can input
your destination and select your route only
when the vehicle is not moving.
CAUTION

For safety, the driver should not
operate the navigation system while
he/she is driving. Inattention to the
road and traffic may cause an
accident.

While you are driving, be sure to
obey the traffic regulations and
maintain awareness of the road
conditions. If a traffic sign on the
road has been changed, route
guidance may provide wrong
information such as the direction of
a one way street.