2001 TOYOTA HIGHLANDER o2 sensor

2005 HIGHLANDER (EWD592U)
258
Multiplex Communication System - BEAN Bus
MPX1 MPX1
MPX1 IF3 5
IB2 1A 10B 6
MPX2 S20
8 7 10
MPX2
P 5
4F 7
Y GR Y O
GR
4O 4
34A 5IL2 12MPX-
B 2A 9
MPX+ MPX+
A 21B 9
MPX-
GG W
SB
MPX2
MPX1IL21
I 8
GR GR
GR Y
O 3* 2 : w/o Theft Deterr ent System * 1 : w/ Theft Deterrent System
* 3 : w/ Navigation System
* 4 : w/o Navigation System
3E 1
3J 12
Y
3H 5
MPX1 31
V
T 4
IB2 8
VSB(
*2)
MPD2
MPD1
G 5
11
4 V
G (
*3)
(
*3)
(
*4)B 1B2
A 1A2
MPX1 24
MPX2 22
BR BR
R
A17BR
R
BR
(
*1)
IE1 618 29
E 6
C11(
A)
, C12(
B) A10(
A)
, A11(
B) S30(
A)
, S31(
B) B 9(
A)
, B10(
B)
A/C Control Assembly
Airbag Sensor
Assembly
Body ECU
Combination Meter
Engine Control
Module
Gat ew ay ECU
Option Connector 1
Power Window Master SW
with ECU
Sliding Roof
Control ECU
Short Connector
Theft Deterr ent ECU

2005 HIGHLANDER (EWD592U)
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The multiplex communication system communicates among the A/C control assembly, body ECU, combination meter,
engine control module, option connector 1, power window master SW with ECU, sliding roof control ECU and theft deterrent
ECU and controls the following systems according to the signals from respective sensors or switches.
Multiplex Communication System Includes Following Systems
* Air Conditioning (Automatic A/C)
* Air Conditioning (Manual A/C)
* Automatic Light Control
* Combination Meter
* Door Lock Control
* Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
* Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
* Engine Control (3MZ-FE)
* Engine Control (2AZ-FE)
* Headlight
* Interior Light
* Key Reminder
* Light Auto Turn Off System
* Moon Roof
* Navigation System
* Power Window
* Seat Belt Warning
* Theft Deterrent System
* Wireless Door Lock Control
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42C11A42P544
A11B42C12B42S2045
A1742E642S30A43
B9A42G543S31B43
B10B42O343T443
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
3E30
3H31Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3J31()
4A334F33Cowl Wire and Passenger Side J/B (Right Side of Grove Box)
4O32
g(g )
System Outline

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Multiplex Communication System - CAN
7. 5A
ECU- B
2A 4
10 1G
BF 15
29101 IG1S14
Y 1CANL
W- B
W
L
J19
W- BOL
CANHIG
ESS CANL CANHGND 91D
W
B
4N 14C 3
IC
W- B
BR
A J16 10 1D10A
ECU- IG
W- L P
3BAT
Y W
E
21 10
19 8 22 11E
J17P
4J 44C2
4C 11IO2 3V
3 2
W
B
W- B G
W
IO2 12 IO213
B
W
920
Y
4L 7
W- B W- B
W- BV
IC3 5
BBA
W- B
W- B
IC4 12 IC4 13
25 11 14 6
W
B
CANL CANH CANHCANL
S27 D 3
A From Power Source System (
See Page 62)
Data Link Connector 3Junction
Connector
Junction
Connector
Junction
Connector Steering Sensor
Skid Control ECU
with Actuator
Yaw Rate Sensor

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Multiplex communication system (CAN) uses a serial communication protocol and communicates with a differential voltage.
In this network system, TERMINALS CANH and CANL are used for communication between the ECUs and sensors, and
excellent data communication speed and communication error detecting facility are provided. This system is working for the
following system:
*VSC
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
D342J1944S2741 (2AZ-FE)
J1643S1443Y145
J1743S2739 (3MZ-FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
222Engine Room R/B (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1D29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2A27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
4C33
4JCowl Wire and Passenger Side J/B (Right Side of Grove Box)4L32Cowl Wire and Passenger Side J/B (Right Side of Grove Box)
4N
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)IC452Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IO254Cowl Wire and Floor Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IC52Right Cowl Side Panel
BB56Right Center Pillar
BF56Near the Rear Side Marker Light RH
System Outline

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B 29
W
E 6
MPX2
18
22 24 MPX1
G125 12 3J
IB2 1
IF3 5
A 10
B 9
VY O GR
IL2 1
GR
SB
SB BR
MPX2
R PBEW
BRY
BR
4A 3E 1
G
GR4F 7IB2 87 8
P 5
MPX2
MPX1
G GR
IL2A 9
B 2MPX-
MPX+
B 2 B 1
A 2 A 1 MPX1 6
A17MPX2 MPX1
V G
21 A 9 B
VC11(
A)
, C12(
B)
S30(
A)
, S31(
B)B 9(
A)
, B10(
B)
A10(
A)
, A11(
B)
A/C Control Assembly
Airbag Sensor Assembly
Body ECU
Combination Meter
Engine Contr ol Module
Power Window Master SW
with ECU Short Connector

2005 HIGHLANDER (EWD592U)
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IF2 10
IC3 8
EA A1
2
BR P Y- B W- B Y- B
Engine Control Module
Skid Control ECU
with Actuator
L
V
B
W
P
BR
Combination SW
J 3
W 1
IC3 7
IF3 7 15A
H- LP
RH LWR
2
R- Y B G
2 1
IF3 15
IC4 1
EB A
R R- B W- B R- B
J 4
B 4
B
Washer Level
Malfunction
Indicator Lamp
Brake
ABS
VSC
Beam
Turn LH
Turn RH
19 AA 15 A 14 B 16
7 A 17 11 B B 10 B 4 B 12
L
GRTurn Signal Flasher SlipDriver' s
Seat Belt
TRAC OFFAirbag
A/T
OI L TEMP
MAINT REQD
Tire Air
Pressure(
2WD) (
2WD)
13 A 10A
IGN
1G 6
4M 4
4E 1
W
SB P
J 6
E E
IL1 9 P
P
(
USA) (
USA)
* 1 : 3MZ- FEFr om Power Source System (
See Page 62)
Brake Warning SW
Junction
ConnectorJunction
Connector
Junction
Connector Washer Level
Sensor
Combination Meter C11(
A)
, C12(
B)
2 1

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Combination Meter
IB2
IF3 5
A 10
B 6
B 18
B 29
I 31
Y O W GR GR
IL2 1
GR
SB
MPX2
MPX1
MPX1
MPX2
10
Y
S20
MPX1
Y
C 22
Y- B
MOPS
1
O 1
3E 1
E 19
G- B
THW2 1
E 2BRT 4
MPX1
V
(
*6)
3J 12G
G
GR
(
*5) (
*5)
B 9 A 21 3H 531
IE 1 6
B 9(
A)
, B10(
B)
C11(
A)
, C12(
B)
E 6(
B)
, E 7(
E)
, E 9(
C)
Body ECU
Combination Meter
Engine Coolant Temp.
Sensor
Engine Control Module
Oil Pr essure SW Sliding Roof
Control ECUTheft Deterrent ECU
E 28A 5
B 5
E2
BR
Short Connector S28(
A)
, S29(
B)
E14
W- BBR
BR
(
*1) (
*7) (
*7)(
*1)

2005 HIGHLANDER (EWD592U)
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3
O 3Y
(
*2)
44O4F 7IB2 87 8
P 5
MPX2
MPX1
4A 5A 9
B 2MPX-
MPX+
G
A 2A1
B 2B1 A17
MPX2 MPX1
22 24
4 11
G 5
MPD2
MPD1
V
(
*3) G
(
*3)G
(
*4) BR BR BRSB V
G
R GR
IL2 12
A10(
A)
, A11(
B) S30(
A)
, S31(
B)
A/C Control Assembly
Airbag Sensor
Assembly
Gateway ECU Option Connector 1Power Window Master SW
with ECU
Shor t Connector
* 2 : w/o Theft Deterrent System * 1 : 3MZ- FE
* 3 : w/ Navigation System
* 4 : w/o Navigation System
* 5 : w/ Moon Roof
* 6 : w/ Theft Deterr ent System
* 7 : 2AZ- FE