2001 TOYOTA HIGHLANDER ECU

2005 HIGHLANDER (EWD592U)
71
Charge
2 A 1
BR W- L LGPB
73C 43A
11K 10 1G5
A IC37. 5A
ECU- B
2A 4 13 1K 10A
HEATER
R
11 A
IB 3B 12
3K 2
BR
B 9
SB GR
IL2 1 GR
B 2B1
A 2A1
MPX2 22
MPX1 24
BR BR
A17MPX-
MPX+
MPD2
MPD1B 2A 9
BR
BR
RG 5
4 11V
(
*1)
G
(
*1)
G
(
*2)
A 213J 12
3E 1
G
G Y
7V
* 1 : w/ Navigation System
* 2 : w/o Navigation System
IL2 12From Power Source System (
See Page 62)
C11(
A)
, C12(
B)
A10(
A)
, A11(
B) S30(
A)
, S31(
B)
A/C Control Assembly
Airbag Sensor AssemblyCombination Meter
Gat ew ay ECU Short Connector

2005 HIGHLANDER (EWD592U)
78
Engine Control for 3MZ-FE
G 14C RL
21
L
W- G
E16
6 EB1
A2A-
P
EB1
D 5D43 14 2 (
*1)
(
*1) (
*1) (
*1)
HA1A A2A+
R- W B- R
(
*1) (
*1)
A 7
HA2A A1A- A1A+ 3
D 22 D30
BR
Y
D 23 D31
L
R- W
R- L
IGT1
8E
P
IGT2
9E
Y- B
IGT3
10 E
L- Y
IGT4
11 E
G- Y
IGT5
12 E
L- R
IGT6
13 E
Ignition Coil
and Igniters
G
TRC+
31 A
Y
TRC-
25 A
Skid Control ECU
with Actuator
R- W R- W(
*1)
V 7
L
(
*1)
(
*1) (
*1)
2 1
(
*1)
2
1
V 6
C 7
6D
I 6 E05I 6
26 C
L
R
I 6
ECE 6C7 E 7 C 22E04
7
ED D
W- B
W- B
W- B
GGR
MOPS E01 E02 E03
(
*1)
B- W W- B W- B
W- B
G
C 25 C24 C27
(
*1)
1
O 1
Y- B
VV2+ NE+ NE- VV1+2
1 3 14 2
B- W B- RA 6
(
*1)R- W
BRP P
C 4
W- B
ME01
I 6
W- B
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
Air Fuel Ratio Sensor
(
Bank 1 Sensor 1)
Air Fuel Ratio Sensor
(
Bank 2 Sensor 1)
Crankshaft Position
Sensor
Engine Control Module
Generator
Oil Pressure SW
VVT Sensor LH
VVT Sensor RH
HT AF+ HT AF++B AF- +B AF-

2005 HIGHLANDER (EWD592U)
79
A TCA A 20
ENG+ NEOA 17 A24
ENG-A 30
B
V
RSkid Control
ECU with Actuator
EOM
A 15
(
*1)
(
*1)
(
*1)
D 1
2
R
KNK2
(
*1)
(
*1)
BR
BR
(
*1)
(
*1)
(
*1) (
*1)
W
P
KNK1
B
D
2 2A
A 4LR
A29MPX2
11W
L B 5TACHI 8
EA1 4 EA13 EA11 EA1 2
11B 18 D 28 D 20 (
*1)
(
*1)
WG
WG
BR V
EKN2 EKNK MPX1
(
*1)
SIL
B R
GR K 3
K 2
GR A 19 A18
(
*1) SB
(
*1)
A
AA
WF SE
AIM1 4
R
(
*1)
R
(
*1)
O
AAA
(
*1)
(
*1)
B
J 7 6 12 4A
17SPD
Y
B
BRO
V
P
W- B
B
Y
W
W- B
P P
L
Y
* 1 : Shielded
E1E 1
BR
BR
A
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
Engine Contr ol ModuleJunction Connector
Knock Sensor
(
Bank 1) Knock Sensor
(
Bank 2)
IL2 10 IL29

2005 HIGHLANDER (EWD592U)
80
Engine Control for 3MZ-FE
A
AB
B
9TAC
4G 1A 2
WBA
1B
16 75
IC21 IL2MPX1
74L 114L54F
R SB
14N 64C7
1IL2
B 2 12 IL2
GR1
74F
8IB2
1IB2
5IF3
B 68
10 A 10 1E7. 5A
OBD
MPX+ MPX2
W
MPX2
MPX1
W- B
W- B
B
GR O
SB GR
SC SIL BAT
CG
4
W- B
V
G Y OGR
P 5
LY
SB
Y
L O 2B P
4AP
54H
W- B
D
D
15
J16
5
WFSE13
TC
P
11MPD14
MPD2 D 3G 5G
MPX-
V
9A
GV
O
R
W
R
O
V
P
W- B
B
Y
BR BR
BR
22MPX2
24MPX1 A17
(
*2)
(
*1) (
*1)
3E 1
3J 12
GY
* 1 : w/ Navigation System
* 2 : w/o Navigation System From Power Sour ce System (
See Page 62)
S30(
A)
, S31(
B)
A10(
A)
, A11(
B) B 9(
A)
, B10(
B)
A/C Control
Assembly
Airbag Sensor Assembly
Body ECU
Data Link Connector 3
Gateway ECUJunction
Connector
Power Window Master SW
with ECU
Short Connector

2005 HIGHLANDER (EWD592U)
81
Malfunction
Indicator Lamp
13 A 9IL1
SB SB P
P
SBY
B 4
L Y OB 6
W Y
93J
13B IF3 18
IC4 15
GR BR BR- R
12
SP1
S27OL
BR
10A
HEATER
1K 13 4 2A7. 5A
ECU- B
IC3 5
1G 10
1K 1 3A 4
3C 7
B P
LG W- LBR
3F 9
3D 3
VLG
4H 6
4D 11 10A
DOME
2A 3
R VV
V12 IK3
IL2 11
23K 12 3BA 11
R
1B 6B1
13 B
Speedometer
Tachometer
7V 5V A2A12A B 9A21
IB
Y SB
From Power Source System (
See Page 62)
C11(
A)
, C12(
B)
Combination Meter
Skid Contr ol ECU
with Actuator

2005 HIGHLANDER (EWD592U)
82
Engine Control for 3MZ-FE
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outline
of the engine control is given here.
1. Input Signals
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance, which
varies according to the engine coolant temp. The engine coolant temp. which is input into TERMINAL THW of the
engine control module as a control signal.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp. which is input as a
control signal to TERMINAL THA of the engine control module.
(3) Vehicle speed signal circuit
The vehicle speed signal is input from the ABS speed sensor to skid control ECU with actuator, and are sent to the
engine control module through communication control.
(4) RPM signal circuit
Camshaft position is detected by the VVT sensors and its signal is input to TERMINALS VV1+ and VV2+ of the engine
control module as a control signal. Also, engine RPM is detected by the crankshaft position sensor and is input as a
control signal to TERMINAL NE+.
(5) Throttle position signal circuit
The throttle control motor and sensor detects the throttle valve opening angle as a control signal, which is input into
TERMINALS VTA1 and VTA2 of the engine control module.
(6) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. With the ignition SW turned on, the
voltage for engine control module start-up power supply is applied to TERMINALS +B and +B2 of the engine control
module via the EFI relay.
The current flowing through the IGN fuse flows to TERMINAL IGSW of the engine control module.
(7) Intake air volume signal circuit
Intake air volume is detected by the mass air flow meter and the signal is input to TERMINAL VG of the engine control
module as a control signal.
(8) Stop light SW signal circuit
The stop light SW is used to detect whether the vehicle is braking or not and the signal is input into TERMINAL STP of
the engine control module as a control signal.
(9) Starter signal circuit
To confirm whether the engine is cranking, the voltage is applied to the starter motor during cranking is detected and the
signal is input into TERMINAL STA of the engine control module as a control signal.
(10) Engine knock signal circuit
Engine knocking is detected by knock sensors and the signal is input into TERMINALS KNK1 and KNK2 as a control
signal.
(11) Air fuel ration signal circuit
The air fuel ration is detected and input as a control signal into TERMINALS A1A+ and A2A+ of the engine control
module.
(12) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OX1B and OX2B of
the engine control module.
To maintain stable detection performance by the heated oxygen sensor, a heater is used for warning the sensor. The
heater is also controlled by the engine control module (HT1B and HT2B).
(13) Fuel cut in a collision
The system receives the collision signal from airbag sensor assembly in the vehicle has a collision and stops the fuel
pump operation on the side of the engine control module.
System Outline

2005 HIGHLANDER (EWD592U)
91
S15
C 224L 3
B Y- B
O 1
A 292
BR
EPA2 EPA2
12
1+BM
W
B 6A27
VPA2
VPA2
W
210A
ETCS
3
23 A
MOPS
R 4M
A A
B
GY
17 31 24TRC-
C 10
17E 20A
STOP
1E 1
E 6
P 2
TRC+ 1 2
A
Y BR R- L
W- B W- B
E02 E01 PSW
25 STPB 19
EFNEO
V
2
2
E 16
NSW
B- R
E 17
STA
B
54
NP7. 5A
STARTER
EB2 3
E 7
B- R L B- R P 1
R
P PENG+
A30
R
ENG-
A
Skid Control ECU
with Actuator
W- B W- B
A 271
L
VCP2 VCP2
A 285
R
EPA EPA
A 226
B
VPA VPA
A 264
G
VCPA VCPA
B 27
B
IMI
B 26
V
IMO
EFIO EFII67
T1 4 2
IC1 4
R
4C
W- B
ME01
I 6
W- G
G 14C 21RL
L W- BW- B
NC- NC+ NT- NT+
W- GY R- WWT 3
C 6
D 261
2
D 34 35 D 2 1
27 D
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C) Fr om Power Source System (
See Page 62)
Accel Position Sensor
Counter Gear Speed
Sensor
Engi ne Control Module
Gen erat or
Oil Pressur e SWPark/Neutral
Position SW
Power Steering Oil
Pressure SW
Stop Light SW
Turbine Speed Sensor
Transponder Key Computer

2005 HIGHLANDER (EWD592U)
93
O
L
Y
P5
W
Y
GR
IF3
A 10
B 6MPX2
MPX1
O
L 8
O
SBSBY
7
1IB2MPX1
MPX2
P 5 Y
8IB2
V
4A 5
4F 7
A 2 A 1B 1B2
IL2 12
V
114
MPD1
MPD2G 5G
B 2
A 9MPX+
MPX-A17
13E3J 12
(
*2) G
(
*3)
(
*2)R SB
R
BRBR
G Y
BR
BR
24
MPX122
MPX2P * 2 : w/ Navigation System
* 3 : w/o Navigation System W- B
BB BF AAABJ1 15
W- B W- B W- B
W- B
J1 9
A10(
A)
, A11(
B) B 9(
A)
, B10(
B)
S30(
A)
, S31(
B) A/C Control Assembly
Airbag Sensor Assembly
Body ECU
Gat eway ECU
Ju nctio n
Connector
Power Window Master SW
with ECU
Short Connector