TOYOTA HIGHLANDER 2001 Service Repair Manual

[A]
[B]
[H] [D]
[F] [E]
[ I ]
[L]
[M][J]
[K][G] [C]
1 2
IBIB
34
4 7
2111134
1 2
6 3
1 2
B18
BLRL
GR
B18 GR
3 4
Rear Combination Light RH R 7
Rear Combination Light LH R 6
High Mounted
Stop Light H17Light Failure Sensor Stop Light SW
ABS ECUS 6
Combination
Meter C 7
BV11
WB(Shielded) BV11I 5 GWIB 2IB 1
IE1 14
BO
50
8L 4 15A
STOP7.5A
GAUGE From Power Source System (See Page 66)
Stop Light
GR WB WB
WB
WBGB
YG RLR GR
WR GW WB
GW
W/ G)
(
S/D)
L L(
(
S/D)
Stop
Stop
Rear
Lights
2005 HIGHLANDER (EWD592U)
4
B HOW TO USE THIS MANUAL
*The system shown here is an EXAMPLE ONLY. It is different to the actual
circuit shown in the SYSTEM CIRCUITS SECTION.

2005 HIGHLANDER (EWD592U)
5
B
[A]: System Title
[B]: Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish it
from the J/B
Example: Indicates Relay Block No.1
[C]: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
[D]: Indicates related system.
[E]: Indicates the wiring harness and wiring harness
connector. The wiring harness with male terminal is
shown with arrows (
).
Outside numerals are pin numbers.
Female Male ( )
The first letter of the code for each wiring harness
and wiring harness connector(s) indicates the
component's location, e.g, ºEº for the Engine
Compartment, ºIº for the Instrument Panel and
Surrounding area, and ºBº for the Body and
Surrounding area.
When more than one code has the first and second
letters in common, followed by numbers (e.g, IH1,
IH2), this indicates the same type of wiring harness
and wiring harness connector.
[F]: Represents a part (all parts are shown in sky blue).
The code is the same as the code used in parts
position.
[G]: Junction Block (The number in the circle is the J/B
No. and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate
them from other parts.
3C indicates that
it is inside
Junction Block
No.3
Example:
[H]: Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red G = Green LG = Light Green
P = Pink Y = Yellow GR = Gray
O = Orange
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example: L - Y
L
(Blue)Y
(Yellow)
[I]: Indicates a wiring Splice Point (Codes are ºEº for the
Engine Room, ºIº for the Instrument Panel, and ºBº
for the Body).
The Location of splice Point I 5 is indicated by the
shaded section.
[J]: Indicates a shielded cable.
[K]: Indicates the pin number of the connector.
The numbering system is different for female and
male connectors.
Example:
Numbered in order
from upper left to
lower rightNumbered in order
from upper right to
lower left
Female
Male
[L]: Indicates a ground point.
The first letter of the code for each ground point(s)
indicates the component's location, e.g, ºEº for the
Engine Compartment, ºIº for the Instrument Panel
and Surrounding area, and ºBº for the Body and
Surrounding area.
[M]: Page No.

[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
2005 HIGHLANDER (EWD592U)
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B HOW TO USE THIS MANUAL
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
Stop Light Disconnection Warning
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
S6 Stop Light SW
2-1 : Closed with the brake pedal depressed
L4 Light Failure Sensor
1, 2, 7-Ground : Approx. 12 volts with the stop light SW on
4, 8-Ground : Approx. 12 volts with the ignition SW at ON position
11-Ground : Always continuity
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
C734L436R737
H1736R637S635
: Relay Blocks
CodeSee PageRelay Blocks (Relay Block Location)
118R/B No.1 (Instrument Panel Brace LH)
: Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
IB20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3C22Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
: Connector Joining Wire Harness and Wire Harness
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE142Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV150Luggage Room Wire and Floor Wire (Luggage Room Left)
: Ground Points
CodeSee PageGround Points Location
BL50Under the Left Center Pillar
BO50Back Panel Center
: Splice Points
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I544Cowl WireB1850Luggage Room Wire
System Outline
Service Hints

2005 HIGHLANDER (EWD592U)
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B
[N]: Explains the system outline.
[O]: Indicates values or explains the function for reference during troubleshooting.
[P]: Indicates the reference page showing the position on the vehicle of the parts in the system circuit.
Example : Part ºL4º (Light Failure Sensor) is on page 36 of the manual.
*The letter in the code is from the first letter of the part, and the number indicates its order in parts
starting with that letter.
Example : L 4 Parts is 4th in order
Light Failure Sensor
[Q]: Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector º1º is described on page 18 of this manual and is installed on the left side of the instrument
panel.
[R]: Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.
Example : Connector º3Cº connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of this
manual, and is installed on the instrument panel left side.
[S]: Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring
harness is shown first, followed by the male wiring harness).
Example : Connector ºIE1º connects the floor wire (female) and Instrument panel wire (male). It is described on
page 42 of this manual, and is installed on the left side kick panel.
[T]: Indicates the reference page showing the position of the ground points on the vehicle.
Example : Ground point ºBOº is described on page 50 of this manual and is installed on the back panel center.
[U]: Indicates the reference page showing the position of the splice points on the vehicle.
Example : Splice point ºI5º is on the Cowl Wire Harness and is described on page 44 of this manual.

2005 HIGHLANDER (EWD592U)
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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.

Black
[D]
K CONNECTOR LIST
J4 K1 K2 L1
L2 L3 L4 M1 M2 M3
M4 N1 N2 O1 O2Dark Gray
Gray
Dark Gray Black Gray Gray
ABB
AABCCCDD
DDA
AA
AA
A AA1
1212
11
2
1
212 3
6 7 8 9 1 0 111 245
7 12
3456 8
4 32 1
123234
8910 56 1
712
11
[A]
[C] [B]
J3
1212
67812A
AA
A AAABB
AABCCCDD
DD
I14 I15 I16 J1 J2Dark Gray Gray Black
2005 HIGHLANDER (EWD592U)
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B HOW TO USE THIS MANUAL
[A]: Indicates connector to be connected to a part. (The numeral indicates the pin No.)
[B]: Junction Connector
Indicates a connector which is connected to a short terminal.
Junction Connector
Short Terminal Same Color
Junction connector in this manual include a short terminal which is
connected to a number of wire harnesses. Always perform
inspection with the short terminal installed. (When installing the
wire harnesses, the harnesses can be connected to any position
within the short terminal grouping. Accordingly, in other vehicles,
the same position in the short terminal may be connected to a wire
harness from a different part.)
Wire harness sharing the same short terminal grouping have the
same color.
[C]: Parts Code
The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which
start with the same letter.
[D]: Connector Color
Connectors not indicated are milky white in color.

A 1
L PART NUMBER OF CONNECTORS
A/C Ambient Temp. Sensor Code
90980-1 1070Part Number
D 4 Diode (Courtesy) Code
90980-1 1608
A 2 A/C Condenser Fan Motor 90980-1 1237 D 5 Diode (Interior Light) 90980-10962
A 3 A/C Condenser Fan Relay 90980-10940 D 6 Diode (Moon Roof) 90980-1 1608
A 4 A/C Condenser Fan Resistor 90980-10928
90980-1 1271D 7 Door Lock Control Relay 90980-10848
A 5 A/C Magnetic Clutch
90980-1 1413D 8 Door Lock Control SW LH
90980-1 1148
A 6 A/T Oil Temp. Sensor
90980-1 1151D 9 Door Lock Control SW RH
A 7 ABS Actuator
90980-1 1009Door Courtesy SW LH
90980-1 1097
A 8 ABS Actuator
90980-10941Door Courtesy SW RH
A 9 ABS Speed Sensor Front LH
90980-1 1002Door Courtesy SW Front LH
ABS Speed Sensor Front RH
90980-1 1856Door Courtesy SW Front RH
90980-1 1156
Airbag Sensor Front LH Door Courtesy SW Rear LH
Airbag Sensor Front RH Door Courtesy SW Rear RH A10
A11
A12
A13 Airbag Squib 90980-1 1194 Door Key Lock and Unlock SW LH
90980-1 1170
90980-1 1070D10
D11
D12
D13
D14
D15
D16
D17 Door Key Lock and Unlock SW RHPart Number Part Name Part Name
[A]
[B] [C]
2005 HIGHLANDER (EWD592U)
11
B
[A]: Part Code
[B]: Part Name
[C]: Part Number
Toyota Part Number are indicated.
Not all of the above part numbers of the connector are established for the supply.

05CCW-06
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-761
951 Author
: Date
:
ABS WITH EBD & BA & TRAC & VSC SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
The hand-held tester can be used at step 3, 6, 9, 12.
1 Vehicle Brought to Workshop
2 Customer Problem Analysis (SEE PAGE 05-763)
3 Check and Clear DTCs and Freeze Frame Data (SEE PAGE 05-765)
4 Problem Symptom Confirmation
Symptom does not occurs: Go to step 5
Symptom occurs: Go to step 6
5 Symptom Simulation (SEE PAGE 01-36)
6 DTC Check (SEE PAGE 05-765)
There is no output: Go to step 7
There is output: Go to step 8
7 Problem Symptoms Table (SEE PAGE 05-786)
Check for fluid leakage and Go to step 10
8 DTC Chart (SEE PAGE 05-779)
9 Circuit Inspection (SEE PAGE 05-788 to 05-873)
10 Identification of Problem

05-762
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
952 Author
: Date
:
11 Repair
12 Confirmation Test
End