TOYOTA HIGHLANDER 2001 Service Repair Manual

I34966
Multi-Display
Gateway ECU
GTX+
GTX- TX3+
TX3-
M412 M411
L BR
G512 G55 05-1862
- DIAGNOSTICSNAVIGATION SYSTEM
2052 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
AVC-LAN CIRCUIT (MULTI-DISPLA Y - GATEWAY ECU)
CIRCUIT DESCRIPTION
Each unit of the navigation system connected to AVC-LAN (communication bus) communicates by transfer-
ring the signals from each switch.
When +B short and GND short occur in this AVC-LAN, navigation system will not function normally as com-
munication is discontinued.
In AVC-LAN, multi-display becomes the communication master, and the radio receiver assy has enough
resistance necessary for transmitting the communication.
WIRING DIAGRAM
05IT8-02

I38998
Multi-Display:
TX3+
TX3-
M4
I40180
Gateway ECU:
GTX+
GTX-G5
- DIAGNOSTICSNAVIGATION SYSTEM
05-1863
2053 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(MULTI-DISPLA Y - GATEWAY ECU)
(a) Disconnect the connector from the multi-display M4 and
gateway ECU G5.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
TX3+ - GTX+AlwaysBelow 1 W
TX3- - GTX-AlwaysBelow 1 W
TX3+ - Body groundAlways10 kW or higher
TX3- - Body groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1791)

05IS3-02
I38224
I38225
I38226
05-1764
- DIAGNOSTICSNAVIGATION SYSTEM
1954 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NAVIGATION CHECK MODE (GPS INFORMATION)
HINT:

This mode displays GPS satellite information.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (see page 05-1784).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºGPS Informationº from the ºNavigation
Checkº screen.
4. When GPS information is displayed, check the GPS
conditions.
HINT:
This screen is updated once per second when input signals to
the vehicle are changed.

05IS5-02
I38224
I38229
I38230
05-1766
- DIAGNOSTICSNAVIGATION SYSTEM
1956 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NAVIGATION CHECK MODE (NAVI COLOR BAR CHECK)
HINT:

This mode checks the color display on the navigation ECU.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (see page 05-1784).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºColor Bar Checkº from the ºNavigation
Checkº screen.
4. Check each color of the color bar when the ºNAVI Col-
or Bar Checkº screen is displayed.
HINT:
Colors will not be displayed full-screen as in ºDisplay Check
Modeº.

05IS6-02
I38224
I38231
I38232
*1
*2
*3
*4
- DIAGNOSTICSNAVIGATION SYSTEM
05-1767
1957 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NAVIGATION CHECK MODE (PARTS INFORMATION)
HINT:

This mode displays product information on the navigation systems and discs.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (see page 05-1784).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºParts Informationº from the ºNavigation
Checkº screen.
4. Check the navigation and disc information when the
ºParts Informationº screen is displayed.
DisplayContents
Navigation Manufacturer/*1Navigation ECU manufacturer name is displayed.
Navigation Version/*2Navigation ECU version is displayed.
Disc Manufacturer/*3Map disc manufacturer is displayed.
Disc Version/*4Map disc version is displayed.

05IS4-02
I38224
I38227
I38228
- DIAGNOSTICSNAVIGATION SYSTEM
05-1765
1955 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NAVIGATION CHECK MODE (VEHICLE SENSORS)
HINT:

This mode checks the vehicle signal status to the navigation ECU.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (see page 05-1784).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºVehicle Sensorsº from the ºNavigation
Checkº screen.
4. Check all the signals and sensors when vehicle sig-
nal information is displayed.
HINT:
This screen is updated once per second when input signals to
the vehicle are changed.

05-1674
- DIAGNOSTICSAUDIO SYSTEM
1864 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NOISE OCCURS
INSPECTION PROCEDURE
1 CHECK OF SPEAKER INSTALLATION
(a) Check the speaker installation condition.
(1) Check that each speaker is securely installed.
OK: Malfunction disappears.
HINT:
The radio is equipped with a noise prevention system that blocks only excessively loud noise. If loud noise
occurs, check whether or not the ground on the antenna installation part and the proper noise-prevention
equipment are all installed, and whether or not there is improper wiring.
Condition in which noise occursNoise type
Depressing the acceleration pedal increases the noise, and stopping the
engine stops the noise immediately.Alternator noise
Noise occurs during A/C or the heater operation.Blower motor noise
Rapid acceleration during the drive on an unpaved road or after the ignition
switch is turned on makes noise.Fuel pump noise
Pressing and then releasing the horn switch, and keeping pressing the horn
switch makes noise.Horn noise
Quiet noise is heard while the engine is running, but stops with the engine.Ignition noise
Noise occurs in turn with the blink of the turn signal flash.Flasher noise
Noise occurs during window washer operation.Washer noise
Noise occurs while the engine is running, and it continues even after the en-
gine is stopped.Water temperature sensor noise
Noise occurs during wiper operation.Wiper noise
Noise occurs when the brake pedal is depressed.Stop light switch noise
OthersStatic electricity on the vehicle
HINT:

Identify the condition in which the noise occurs, and check the noise filter on the related part.

Make sure first that there is no noise from outside. Failing to do so makes the noise occurrence source
detection difficult and leads to misdiagnosis.

The noise should be removed in descending order of loudness.
NG INSTALL IT PROPERLY
OK
IDENTIFICATION OF NOISE SOURCE
055M1-10

05F45-05
01 BANK 1 - SENSOR 1
01 BANK 1 - SENSOR 2
01 BANK 2 - SENSOR 1
01 BANK 2 - SENSOR 2
A21190
O2S TEST RESULT Screen 05-22
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
212 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
O2S TEST RESULT
1. INTRODUCTION
The O2S TEST RESULT refers to the results of the engine con-
trol module (ECM) when it monitors the oxygen sensor (O2S),
and it can be read using the hand-held tester or the generic
OBD II scan tool. Based on this, you can find the O2S's condi-
tions.
The ECM monitors the O2S for various data. You can read the
monitor result (TEST DATA) of each monitor item using the O2S
TEST RESULT. However, the output value of the TEST DATA
is the latest ºsnapshotº value that is taken after monitoring and
therefore it is not dynamic.
In this repair manual, the description of the O2S TEST RESULT
(for O2S related DTCs) are written in a table.
This table consists of 5 items:
(1) TEST ID (a code applied to each TEST DATA)
(2) Description of TEST DATA
(3) Conversion Factor (When conversion factor has a
value written in the table, multiply the TEST DATA
value appearing on the scan tool by the conversion
factor value. The result will be the required value.)
(4) Unit
(5) Standard Value
If the TEST DATA value appearing on the scan tool is out of the
standard value, the O2S is malfunctioning. If it is within the stan-
dard value, the O2S is functioning normally. However, if the val-
ue is on the borderline of the standard value, the O2S may mal-
function very soon.
2. HOW TO READ O2S TEST RESULT USING HAND-
HELD TESTER
(a) Connect the hand-held tester to the DLC3.
(b) On the tester screen, select the following menus: DIAG-
NOSIS / CARB OBDII / O2S TEST RESULT. A list of the
O2S equipped on the vehicle will be displayed.

LOW SW V VVV
HIGH SW V VVV
MIN O2S V VVV
MAX O2S V VVV
TIME $81 VVV V0.400 V
0.550 V
0.100 V
0.900 V
17
A21191
TEST DATA Screen
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-23
213 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(c) Select the desired O2S and press ENTER. The following
screen will appear.
(d) Press HELP and
simultaneously. More information will
appear.
(e) Example:
(1) The hand-held tester displays º17º as a value of the
ºTIME $81º (see the illustration on the left).
(2) Find the conversion factor value of ºTIME $81º in
the O2S TEST RESULT chart below. 0.3906 is spe-
cified for $81 in this chart.
(3) Multiply º17º in step (1) by 0.3906 (conversion fac-
tor) in the step (2).
17 x 0.3906 = 6.6 %
(4) If the answer is within the standard value, the ºTIME
$81º can be confirmed to be normal.
O2S TEST RESULT Chart:
TEST IDDescription of TEST DATAConversion FactorUnitStandard Value
$81Percentage of monitoring
time when the O2S voltage
is less than 0.05 VMultiply 0.3906%Within 60 %

G30835
Center J/B ECM
ODMS T16
Transmission Control SW and
Transmission Shift Main SW
16
E5
IF3 W-B GR2
L
2 6 W-B 8 13
3F3H
IB
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-981
1171 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
O/D MAIN SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The O/D main switch (transmission control switch) is a momentary type switch. When pressing the O/D main
switch, the O/D OFF indicator light lights up and the ECM prohibits shifting into O/D, and when pressing it
once again, the O/D OFF indicator light goes off and the ECM allows shifting into O/D. Turning the IG switch
OFF will reset the O/D OFF indicator light.
WIRING DIAGRAM
05ITQ-02