o2 sensor TOYOTA HIGHLANDER 2001 Service Workshop Manual

2005 HIGHLANDER (EWD592U)
194
Door Lock Control
25A
DOOR LOCK
2A 2
7. 5A
RAD NO. 2
1J 6
IK2 8
3A 8
3E 13C 6
3G 12
R- B
W B
B BRG
D 9
BECUA 5
IGA 17
ACC D 4
BDR1 1D 3
IB2 2IB23 IB1 3IL1 8
IF3 5
IB2 1 4F 7A 10MPX2
IB2 8
920 108 7
W- L
R- L L- W
YVBR
WY V
YSB
O
CPUB SIG BDRMPX2 MPX1
IB1 2
4L 8
1D 144M 6 1E 4
IA
W- B
W- B W- B
W- B
D12 414 316
4321G
Y
LG
BR
2
IN12
W- B W- B GN D KL KUL L SWE LSW
7. 5A ECU- B
2A 4
IC3 5
1G 10
W- L BR
7. 5A
IG1
1D 1
P 5 1K 6
4A 5 IL2 1
A 21B 9
SB
B 2A 9
Y
R
1H 61K 10
IL2 12MPX1 6B
W
MPX2
MPX+
G
GR
MPX-MPX1
MPX-
MPX+4O 4
MPX1 31
L UL E LSSR12
IA2 14 IA14
BG3 9BG24 3B
LG V
B
1 23O 3
BR
YY
(
*4)
B14 W- B
BE A 4L 10
W- B
W- B
J14
(
*4)
(
*4)20A
P FR DOOR
24 22MPX1 MPX2
A 1A2
B 1B2 A17
BR
BR BR G
MPD2
4 11
MPD1
G 5
V
(
*1)
G(
*1) 3H 5
V
(
*3)R
3A 10
3B 5
18 29
G
(
*2)GR
T 4IL2 8IL217
UL 33 15
L
BR
(
*3)
SB
(
*3)
LG
(
*3)
Y
(
*3) From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
S30(
A)
, S31(
B) A10(
A)
, A11(
B)
C11(
A)
, C12(
B)
A/C Control Assembly
Airbag Sensor
Assembly
Body ECU
Back Door Key Lock and
Unlock SWCombination Meter
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Gat ewa y ECU
Junction
Connector
Op tion
Connector 1
Power Window Master SW with ECU
Shor t Connector
Theft Deter rent ECU
Engine Control
Module E 6

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Wireless Door Lock Control
7. 5A
RAD
NO. 2
1J 6
3A 8 3A 10
3C 6 3B 5
W B BRG
D 9
BECUA 5
IGA 17
ACC 1D 3
IB2 2IB2 3
IB1 3IL1 8
IF3 5
IB2 1 4F 7A 10MPX2
IB2 8
920 108
W- L
R- L L- W
GRBR
WY V
Y SB
O
CPUB SIG BDRMPX2
IB1 2
4L 8
4L 10 1D 144M 6 1E 4
IA
W- B
W- B W- B
W- BIB1 5IB14 B BIA2 13 D 1ACT+
D 2ACTD
56
D12 414 316
4321
G
Y
LG
BR
W
RL
BRL
L
B
2G
L
IN12
W- B W- B GND KL KUL LSWE LSW
BR
7. 5A
ECU- B
2A 4
IC3 5
1G 10
W- L BR
7. 5A
IG1
1D 1
P 5
20A
P FR DOOR
1K 6
4A 5 A 21B 9
Y G Y
R
1H 61K 10
IL2 12MPX1 6B
W
MPX+G
GR
MPD2 MPX-
MPD1
L UL E LSSR L UL
M 7
V
MPX1J 5
B 2A 9
MPX-
MPX+IL21
3J 123E 1
11
4B 1B2 A 1A2
31
V
MPX1
T 4
3H 5MPX1 MPX2
BR BR
BR
A17
G
G 5
SB GR
G
(
*1)
(
*1)
B MPX2
MPX1
E 6
29
24 1822
(
*3)
(
*2) From Power Source System (
See Page 62)
C11(
A)
, C12(
B)
S30(
A)
, S31(
B)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
A10(
A)
, A11(
B)
A/C Contr ol Assembly
Airbag Sensor
Assembly
Body ECU
Combi nati on Meter
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Engine Control
Module Gateway ECU
Juncti on
Connector
Power Window Master SW
with ECU
Short Connector Theft Deterrent ECU

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25A
DOOR
LOCK From Power Source System (
See Page 62)
2A 27. 5A
RAD
NO. 2
1J 6 10
IK2 83A 8 3A 10
3C 6 3B 5
61H
BECU 9D1K
R- B
W B
B BRG
A 5
IGA 17
ACC D 4
BDR1 42A
1D 3
IB2 2IB2 3
IB1 3IL1 8
IF3 5
IB2 1
4F 7A 10MPX2
IB2 8
920 107
W- L
R- L L- W
GR VBR
WY V
Y SB
O
CPUB SIG BDRMPX2 MPX1
IB1 2
4L 8
4L 10 1D 144M 6 1E 4
IA
W- B
W- B W- B
W- BIB1 5IB14 B BIA2 13 D 1ACT+
D 2ACTD
56
D12 414 316
4321
G
Y
LG
BR
W
RL
BRL
L
BB
2
LG
L
IN12
W- B W- B GND KL KUL LSWE LSW
BR
IC3 5
1G 10
W- L BR
7. 5A
IG1
1D 1
P 5 20A
P FR
DOOR
1K 6
4A 5 IL2 1
A 21B 9
SB
B 2A 9
G
R
GIL2 12 6B MPX+
G
GR
MPX- MPX-
MPX+
UL E LSSR L UL
M 7. 5A
ECU- B
1D 9
P
V
PB B
* 1 : w/ Navigation System
* 2 : w/o Navigation System
E E
P
B 1B2 A 1A2
BR
3J 123E 1
3H 5
Y
MPD1 MPD2
G 5
11 4
V
V
(
*1)
(
*2) G
(
*1)W
MPX1
E 618 29
MPX2
MPX1
W
8
W- B
GR
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
C11(
A)
, C12(
B)
A10(
A)
, A11(
B)
A/C Control AssemblyBody ECUCombination Meter
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Engine Control Module
Gateway ECU
Power Window Master SW
with ECU
Junction
Connector J17
Junction
Connector J 5
MPX1 MPX2
Airbag Sensor
Assembly A17Short
Connector S30(
A)
, S31(
B)22 24
BR BR

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Key Reminder and Seat Belt Warning
B 2
D D
1 2
4G 9
4L 74N1
IC
W- B G G
C 11
BB
W- B
W- B
7. 5A
RAD
NO. 2
1J 6
3A 8
3C 6
A 17
BW
7. 5A
IG1
1K 10
3A 10
3B 5
A 5
BR GR
7. 5A
ECU- B
2A 4
W- L
IC3 51G10
1H 6
D 9
G
ACC IG BECU
DCTY KSW
BR
1
D 7
K 4J 6
B 6
IB2 1
8MPX1
4F 7
4A 5
SB GR
P 5
W
MPX2
YO
IF3 5A 10MPX2
MPX2 MPX1 * 1 : w/ Navigation System
* 2 : w/o Navigation System
BR BR
BR R
W
IB2 8
7
V
MPX1
SB
B 22 B24
FSR- FSR+C
W
B
1C2
A 19 A2(
*3)
A 11 A6(
*4) LBE+ LBE-
3 1
G
R
B19 * 3 : w/ Curtain Shield Airbag
* 4 : w/o Curtain Shield Air bag
R
B W
IA1 9A 2A1 B 2B1
C 3C10(
*3)
(
*4) 1K 1LG
LG
From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
S30(
A)
, S31(
B) A16(
A)
, A17(
B)
, A18(
C)
Airbag Sensor
Assembly
Body ECU
Buckle SW LH
Door Courtesy SW
Front LH
Junction
Connector Unlock Warning SW
Power Window Master SW
with ECU
Short
Connector

2005 HIGHLANDER (EWD592U)
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IL2 12
R
Y
B 2A 9
MPX+MPX-3E 1
3J 12
G
V(
*1) W
G(
*2) 4
11MPD1
MPD2
G 5
G(
*1)
G(
*2)FSR+ FSR-A
B
W
B 8 4A8
B 12
12 SVC2 SIG2
SVC2 SIG2
W
L
B
3 2SGD2
SGD2
O
O 9 R
BL1 4BL11 W
B
1 2
B17A 5 A 9BSW BGND
L
GR
LG
W LG
Y
O 6(
A)
, O 7(
B)
Passenger' s
Seat Belt
A10(
A)
, A11(
B)
A/C Control Assembly
Buckle SW
(
Front Passenger ' s Side)
Gateway ECU
Occupant Classification ECU
Occupant Classification
Sensor Front RH

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1. Seat Belt Warning System
When the ignition SW is turned to the ON position, the signal is input to the body ECU. At this time, to judge whether or not
the driver fastens the seat belt, the signal from the buckle SW LH is input to TERMINAL (A) 10 of the body ECU via multiplex
commnunication system (Bean bus). If the driver does not fasten the seat belt, the seat belt warning light in the combination
meter flashes and the alarm buzzer goes on, in response to the communication control of the body ECU etc.
Additionally, the sensor (Inside of buckle SW (Front passenger's side) ) installed on the front passenger seat detects the
passenger and determines whether or not the passenger fastens the seat belt.
If the passenger does not fasten the seat belt, the front passenger seat belt warning light is flashed.
2. Key Reminder System
If the driver door is opened with the ignition SW set at the ACC or OFF position and the ignition key remained inserted into
the key cylinder (The unlock warning SW is on), the signal from the unlock warning SW is input to TERMINAL (B) 2 of the
body ECU and the signal from the door courtesy SW LH is input to TERMINAL (C) 11 of body ECU. As a result, through
communication control of the body ECU etc. the buzzer in the combination meter goes on to warn the driver that the ignition
key is still inserted.
B19 Buckle SW LH
1-4 : Closed with the driver's seat belt in use
D7 Door Courtesy SW Front LH
1-Ground : Closed with the LH door open
K4 Unlock Warning SW
2-1 : Closed with the ignition key in the cylinder
B17 Buckle SW (Front Passenger's Side)
1-4 : Closed with the front passenger's seat belt in use
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42B1747 (w/o Power Seat)O6A46 (w/ Power Seat)
A11B42B1946 (w/ Power Seat)O6A47 (w/o Power Seat)
A16A42B1947 (w/o Power Seat)O7B46 (w/ Power Seat)
A17B42C11A42O7B47 (w/o Power Seat)
A18C42C12B42O946 (w/ Power Seat)
B9A42D744O947 (w/o Power Seat)
B10B42E642P544
B11C42G543S30A43
B12D42J643S31B43
B1746 (w/ Power Seat)K443
System Outline
Service Hints

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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

2005 HIGHLANDER (EWD592U)
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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