engine TOYOTA HIGHLANDER 2001 Service Repair Manual

2005 HIGHLANDER (EWD592U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
19 HIGHLANDER
Power SourceT he ft D ete rren t S y s tem
7. 5A ECU- B
15A SECURI TY
2A 4 2A 5
2I 12ACC
IG1 AM1 4
40A
AM1
1A 11C 6
32
110A
ECU- I G 1C 7
1K 9
3A 1
3E 5
3J 11
3F 13
IBRight Ins tr ument
Panel Br ac e17 IL2
14 IA28IL2
4IA2
9BG3 4BG2
SB BR
Y LG
V B
BRY23 15 33 31
Multiplex Communication
Sy st em (
BEAN Bus)
<20- 4>A
BE Left Side of
Ba ck Do or1 23110
114IC3
2IF1 5IC3
1G 10
1D 9
11 IL1 18 IL2
3C 8
3B 2
1 26IL2
15 IK317 IF3
2IC3
1 A
EG Under the Left
He ad li g ht G
D. C. C
1 2
WW
Batt ery
W- B W- B
3 212L
BRWL
OP G
P
R
W- BB
W- B LG B B- O
WG G-BW-B
2 1
140A ALT
IG
I OUT MPX1 L UL DSWH
34 +B2 +B1 KSW
SH- E
1 29
W- B L
W- LRG
O
FL MAIN
3. 0W
Unlock Warning SW
<26- 2>
53D
3F 1125
W- B O
O
IND S+B
GND IOUT
WOp t i on
Connec tor 1
<20- 4> Op t i on
Connec tor 1
<20- 4>
BLG
(
*1)(
*1)* 1 : w/ o Theft Deter rent Sys tem
E E
P
YW- L
B
ST1
11 3K
Tr ans ponder Key Comput er
<4- 4>
R F 7I15
T 4
T 5
O 4E 3T 1
J 1 B14
J14Back Door Key Lock
and Unloc k SWEngine Hood
Courtesy SW
Fusible Link
BlockIgnition SW
J unc tion
Connec tor Junc tion
Connec tor
Option Connector 2Theft Deterrent
Ho r n
Theft Deterrent ECU
Theft Deterrent
Indicator Light
Junction
Connector J17

2005 HIGHLANDER (EWD592U)
M
34
2 1
20 HIGHLANDER
2ACC
IG1 AM1 4
1C 6
1A 12
1
W B
Batt ery W
W
81H
Power Source Moon Roof
20A S/ROOF40A AM1
2IE1
Left Cowl Side Panel
IA
WW- B W- B
G W89 7DWNMPX1
UP EL1
B
FL MAIN
3. 0W
W- B4D 5
4M 64N1
1E 4
1D 14W- B
ICRight Cowl Side PanelW- B
6IE1
Y GR GR10MPX1 MPX2
6B
10 A
OMPX2 MPX19B
21 AMPX- MPX+
9A
2B
YMPX+ MPX-
5IF3
1IB28 7
MPX2 MPX1 8IB24A 5
4F 74O4
GR
GR Y V SBY
GR
M u ltip le x C o m m u n ic a tio n
System (
BEAN Bus)
IL21
* 2 : w/o Theft Deterrent System
(
*2)
* 1 : w/ Theft Det err ent Syst em
D. C. C
2A 4
2I 1
32
1W140A ALTR
6IG
IE1 4
7. 5A IG1
71C
1D 2
VGR9
IG6
UP DOWN411
IG3 3IE1
PB5
ECUBE E
5IC31D 9
1G 10
BR W- L P
P
GWBack Door Key Lock
and Unlock SW
< 19- 3> < 19- 4>
123
BRMPX1 MPX2
BR
A 1 A 2
22 24B 1 B 2MP D 1 MP D 2 11
4
12 IL2G
(
*4)
(
*3) V
(
*3) G
R
13E
12 3J
G
31
MPX13H 5V
(
*1)
SB(
*2)
(
*2) B LG BR
BR * 3 : w/ Navigation Sy st em
* 4 : w/o Navigation System
ST1
IG EIG1 GND5
210
67
BRB
7. 5A ECU- B
A u tom a tic
Glare- Resistant
EC M irror
18 29
8IE1
GND1
W- B
74L
W- B
F 7I15J17
O 5
I17A1 7
S3 0(
A)
, S31(
B)
O 3
P 5
B 9(
A)
, B10(
B)
E 6
S20 T 4 G 5
A10(
A)
, A11(
B)
C11(
A)
, C12(
B)
A / C Co nt r ol As se mbl y
Air bag Sens or As sembly
Body ECU Combination Meter
Engine Contr ol Module
Fus ible Link Block
Gateway ECU
Ignition SW
Inner MirrorJunct ion
Connect or
Option Connec tor 1
Overhead J/B
Power Window Mast er SW
with ECU
Sliding Roof Control ECUShor t Connec tor Theft Deterrent ECU

2005 HIGHLANDER (EWD592U)
M OVERALL ELECTRICAL WIRING DIAGRAM
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2 1
27 HIGHLANDER
L
21C
Power Source
1D 4
1F 1
3A 6
3F 13
IBRight Ins trument
Panel Br ace1
1 22LG
PW-B W-BW- B V
B
E
Power Outlet (
12V)
C iga re tte L igh te r
ACC
Relay
15A CIG71H
2 1
5 3
LG
A
EH
R1
+BL
3 2-SG- RB 5 1
+S
WW- B
W- B
4E 2
GRY
W- B
GR
4
AC2 7 3
AC1 3
63D 3A
W- B
10 1K 4
1C 7
R
G
10
7. 5A IG1
1
4
W
W
7IA15 EXCD 3
1K 4
Engine Contr ol Module
<2- 12><3- 10>
11J
1
GW-BB
E 2
2
140A ALT11A 140A AM1 15A
PWR OUTLET1
1C 62ACC
IG1 AM1BW
Bat tery FL MAIN
3. 0W
W
32I 120A
POWER OUTL ET2
2C 6W G- RINVERTER Relay
1D 14
3G 4
Y
2IA2
IALef t Cowl Side Panel W- B
W- B
W- B
3F 12W- B
BB
Rear Side of
Rear Cr oss Member BC
W- BB
Under t he
Left Headlight 7IL222
22 15 IK2
R
7IA2 1IK2
RR
R
L
G* 1 : w/ Rear Seat Entertainment System
G
(
*1)G
(
*1)
ST 1
BIND
E
Power Outlet (
110V)
F 7
C 9
J 2
J12
V1 5
P23
M 2
R1 3
F 8
I15
Cigarette
Lighter Fusible Link Block
Front Power Outlet
I gnit ion SW
Junct ion
Connect or
Junct ion
Connect or
Main SW Power Outlet
(
110V)
Rear Power Outlet
Volt age Inver ter

2005 HIGHLANDER (EWD592U)
M OVERALL ELECTRICAL WIRING DIAGRAM
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234
31 HIGHLANDER(
Cont. next page)
C om bin ation M ete r Power Source
2
7ACC
IG1
IG2
ST2 AM1 4
6 AM2
1A 11C 6W
FL MAIN
3. 0W
Bat tery10
W2
140A ALT30A AM2
11IC1
2I 1
3
10A HEATER
1C 7
1K 13
Engine Cont rol Module
<2- 18><3- 13> VSC and Tir e Press ure
War ning Sy st em< 15- 10>
5IC3
1G 10
1K 1
10A
DOME
2A 42A33F 9
3D 3 11 IL2
4H 64D 11
12 IK3
BL- YW
D. C. C
7. 5A
ECU- B
W- L10A
IGN1C 1
1G 6
R
Y
G
GRW- L V
V
R
LG
BR
P LGV
B
W
40A
AM1
O
3J 9W
P
4M 44E 1 ST1
P
7
3C 4
3A B
1 2
7V 5V
B 6 B 1B 13A 12 A 2 A 1 A 7Illuminat ion Lights
<11- 4>
Rheostat
SpeedometerTachometer
LCD
Fu el Water Temp.
22 A
6
3F
1
3B
12
3KW
Y
OMulti- Display
<30- 5>
Engine Cont rol
Module<2- 16><3- 6>
Navigation ECU
<30- 7>A
B P
W- B 3E 10
13 3F
W- B W- B
B
F 7I15
C11(
A)
, C12(
B)
Combination Meter
Fusible Link BlockIgnition SW

2005 HIGHLANDER (EWD592U)
M
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678
31 HIGHLANDER (
Cont' d)(
Cont. next page)
2IR2
5BH111 IR2
3K 23B 6
IBRight I nst rument
Panel Brace
OOPY
V
BR
10 IF2
8IC3
EARight Fr ont
Fender Apron A2 1
BR P Y- B
Y- B
W- B Engine Control
Sys tem< 2- 4> < 3- 4>
VSC and Tir e Pres sure
Warning System< 15- 9>
Combination Meter
A A14 BH1
D D
P23
O
O
13 A
B 7 A 17 11 B 10 B 4B 12 B 9A
VSC
ABS
Brake
Malfunction
Indicator Lamp
Washer Level CRUISE
Oil Pressure
Char ge
ECT SNOW
Fue l
L
2
D
N
R
P
Do or
Buzzer 3 O/ D OF F A/T
OIL TEMP
Air bag
Driver ' s
Seat BeltSlip MAINT REQDTi r e Ai r
Pressure
(
USA)(
US A)
E E P
9IL1PSB
A
W- B
B
P
W- B
TRAC OFF (
2WD)(
2WD)
* 1 : 3MZ- FE
(
*1)(
*1)
3B 1211 AR
F12J 3
W 1
J13
C11(
A)
, C12(
B)
J 6
Combinat ion Meter
Fuel SenderJunction
Connector
Junct ion
Connect or
Junct ion
Connect or Washer Level
Se nso r

2005 HIGHLANDER (EWD592U)
M
34
2 1
32 HIGHLANDER
1C 6
40A
AM1
1A 1
42140A ALT
30A CDS
30A RDI
1 2
5 322
2 2
1 2
M2 1
5 3
4 22
22 2
2G 382G
2E 2
2 3
EBRight Fr ont
Fender Apron2 1
5 3 22
22
1 2
M1G 81C 7
142E2G 6 2G 7
2A 8
A 1 2GG
B- R
B- Y B- R
L- Y
Y WB WB- R
W B- RY
B- R
R- L
L- RW- B R- Y
R- Y W- B B- RY
B- Y B- Y
FAN NO. 3
RelayFAN
NO. 1
Relay FAN
NO. 2
Re l ay
Battery
W
Power Source
R adiator Fan and Condenser Fan (
3M Z- FE)
6
10 A HEAT ER
FL MAIN
3. 0W
EGUnder the Left
Headlight
W- B
A A
7IK2
B- R
B- R
R- L
L- YEngine Control
Module< 2- 7>
1 2
12 1
R- L
MG CLT Relay
<34- 8><35- 8> Y- G
2ACC
IG1 AM1 4
L- W
L- Y
2 EB2
EH Under the Left
He ad li g htA 2G 2
2F 4
R- YW- B
5 EB22B 3
R- Y R- Y
A W- B
W- B
F 7I15
D 2
C 5W 4
J 2 J 4
R 1
W 3
A 3
Single
J 5
Pressure SW
Condens er Fan Mot or
Di od e
(
Cooling Fan) Fus ible Link Bloc kI gnit ion SW
Junc tion
Connec torJunction
ConnectorJ unc tion
Connec tor
Radiator Fan Mot or
Water Temp. SW No. 1
Water Temp. SW No. 2

2005 HIGHLANDER (EWD592U)
M OVERALL ELECTRICAL WIRING DIAGRAM
34
2 1
33 HIGHLANDER
1C 6
40A
AM1
1A 1
42140A ALT
30A CDS
30A RDI
1 2
5 322
2 2
1 2
M2 1
5 3
4 22
22 2
2G 282G
2F 4
2 3
EH2 1
5 3 22
22
1 2
M1G 81C 7
12G 6 2G 7
2A 8
A 1 2GG
B- R
B- Y B- R
L- Y
Y WB WB- R
W B- RY
B- R
R- L
L- R W- B
W- B R- Y W- B B- RY
B- Y B- Y
FAN NO. 3
RelayFAN
NO. 1
Re la y FAN
NO. 2
Relay
Battery
W
Power Source
R adiator Fan and Condenser Fan (
2AZ- FE)
6
10 A HEAT ER
FL MAIN
3. 0W
EG Under the Left
He ad li g ht
W- B
A A
7IK2
B- R
B- R
R- W
L- Y R- Y
2ACC
IG1 AM1 4
Engine Cont rol Module
<3- 8> L- W
Engine Contr ol Module
<3- 8>
L- Y
2G 3
2E 2
AR- YW- B
2B 3R- Y
ST 1
5EB2 2 EB2
F 7I15
Si n gl e
A 3J 2 R 1
J 5
C 5Pr es su re SW
Condens er Fan Mot or
Fusible Link BlockI gnit ion SW
J unc tion
Connec tor
J unc tion
Connec tor
Radiator Fan Mot or
Under the Left
Headlight

2005 HIGHLANDER (EWD592U)
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678
34 HIGHLANDER (
Cont' d)
A ir C onditioning (
A uto m atic A /C)
2 1
3 5
18 IK3
2B
15 IL2 4 IL2 13 IL2 3 I L2 14 IL2
M 8B 7B 1B 9B 6B28 E
MG CLT
Relay
54123LGL
V GB BRR BR BR
WB G O Y- GY- GAOF AOD SG- 4 S5- 4 TPOE2 ACMG MPX+ AY
4A 6A 5A5IK3
32 B
B- R
Y WB
11 A
IB Right Ins trument Panel Brace3J 6
3F 132C 22E3
9 EB2
2IK3
2 13
EE Intake Side of
Cylinder Block EH Under the
Lef t Headlight1B 23C
A A
LG
W- B W- BW- BBR BR W- L B- Y
2A 8 7IK2
MR/F AIFTAM
LCK1
B
AIR2
1Y
B- R
HP
1
4 GN D
A
Di o de(
Cooling Fan)
<32- 2>
+B 16
ILL+ 12
ILL+ 13
ILL- 1
ILL- 2
ACC 15
IG 14
BLK 6
STX 7
CL K 8
DPD9
SWD 10
HAZ 18
GN D3
SG 4 Co nt r ol P an el* 2 : 2AZ- FE * 1 : 3MZ- FE
6 EB2
5A
5B
BRBR
(
*2) BR BR
Rear Side of
Cy linder HeadED
(
*1)
52114 ADIM
SB
Telltale Light Assembly
<16- 3>
(
*1) Y- G
2B 9A
MPX-
Multiplex Communication
Sy st e m (
BEAN Bus)
< 20- 4>
29 B 18 B
MPX2 MPX1Multiplex Communication
Sy st e m (
BEAN Bus)
< 20- 3>
A1 5A13 A10(
A)
, A11(
B)
A 1
S28(
A)
, S29(
B)
E 6(
B)
, E 7(
E)
, E 9(
C)
A 2
Du al
A 3
J 7
J 2
A/C Ambient Temp.
Sens orA/C Magnet ic Clutch
A/C Lock Sens or
Pr es sur e SW A/C Control Assembly
Air Inlet Control
Servo Motor
Air Vent Mode Contr ol Serv o Mot orEngine Control Module
Junc tion
Connec torJunction
Connector
Short Connector
19 E
THW
Engine Cont rol Sys tem
<2- 10><3- 7>

2005 HIGHLANDER (EWD592U)
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35 HIGHLANDER (
Cont' d)
A ir C onditioning (
M anual A/C)
2 1
3 5
18 IK3
2B
15 IL2 4 IL2 13 IL2 3 IL2 14 IL2
M 8B 7B 1B 9B 6B
MG CLT
Relay
54123LGL
V GB BRR
WB G O Y- GY- GAOF AOD SG- 4 S5 - 4 TPOACMG AY
18 B2C 22E3
9EB2
2IK3
2 13
EEIntake Side of
Cylinder Block EHUnder the Left
Headlight 1B 23C
A A
LG W-BBR BR W- L B- Y
2A 8 7IK2
MPX1
LCK1 YB- R
PRE
1
4 29 B
MPX2
EDRear Side of
Cy linder HeadBR
(
*1)
(
*2)
AY- G
Di o de
(
Cooling Fan)
<32- 2>(
*1)
IG 14
+B 16
ILL+ 12
ILL+ 13
ILL- 1
ILL- 2
ACC 15
5V 11
TEST5
SG 4
BLK 6
ST X 7
CLK 8
DP D9
SWD 10 Cont rol Panel
HA Z 18
GND3
9AMPX-* 1 : 3MZ- FE
* 2 : 2AZ- FE
14 ADI M
SB
Telltale Light Assembly
< 16- 3> Multiplex Communic at ion
Syst em (
BEAN Bus)
<20- 4>
2BMPX+
Multiplex Communication
Sy st e m (
BEAN Bus)
<20- 3>
A15 A1 0(
A)
, A11(
B)E 5(
A)
, E 6(
B)
, E 9(
C)
J 2J 7
Du alA 3
Pressure SW A/ C Con t ro l As semb ly
Air Vent Mode Cont rol Ser vo MotorEngine Control Module
Junct ion
Connect orJunction
Connector
A/C Magnet ic Clutch
A/C Lock Sens or A 2

M
2005 HIGHLANDER (EWD592U)
347
[A]: System Title
[B]: 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)
[C]: The position of the parts is the same as shown in
the wiring diagram and wire routing.
[D]: 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
The numbering system for the overall wiring diagram is
the same as above
[E]: 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
[F]: 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:
[G]: Indicates related system.
[H]: 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 ( )
[I]: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine type,
or specification is different.
[J]: Indicates a shielded cable.
[K]: Indicates and located on ground point.
[L]: The same code occuring on the next page indicates
that the wire harness is continuous.