2001 TOYOTA HIGHLANDER relay

2005 HIGHLANDER (EWD592U)
147
Automatic light control is designed for turning taillights and headlights on/off automatically according to the surroundings
brightness when the light control SW is on AUTO position under the condition that the ignition SW is on.
Automatic Light Control Operation
When the surrounding darkens (Darker than the value set for taillight lightning), taillight is automatically turned on under the
condition that the ignition SW is on with the light control SW being on AUTO position. When further darkens (Darker than the
value set for headlight lightning), the headlight is automatically turned on.
In addition, if the brightness reaches the value set for turning the each light off, each light is turned off.
C13 Combination SW
14-16 : Closed with the light control SW at TAIL or HEAD position
13-16 : Closed with the light control SW at HEAD position
12-16 : Closed with the light control SW at AUTO position
D7 Door Courtesy SW Front LH
1-Ground : Closed with the door open
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A2342B11C42D744
B9A42B12D42F738 (3MZ-FE)
B10B42C1342
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
323Engine Room R/B No.3 (Engine Compartment Rear Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A29Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1H29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1J28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A
2G27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2I
gg(g)
3A
3B30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3C
()
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA152Cowl Wire and Floor No.2 Wire (Left Kick Panel)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IA52Left Cowl Side Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E1048 (3MZ-FE)Engine Room Main Wire
System Outline
Service Hints

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148
Light Auto Turn Off System
7. 5A
ECU- B
2A 47. 5A
IG1
1K 10
140A ALT
2
1
F 7 W
1A 115 231J 4
3
TAILLIGHT
Relay 40A MAIN
2I 12G 4
2
13 13 253
DRL NO. 2
Relay
3
B WR-BR-B
41 322B 1HEAD LAMP
Relay
L- R
SB L- R
(
*1)
R- B(
*1) (
*2)
A 7C3IK3 4
R SB
L- R
(
*1)
L- R
(
*2)
TRLY HRLYD 9
G
1H 61G 10IC3 5
BR W- L
BECUA 5
BR
3B 53A 10
GR
IG
B 2KSW
D D
1 2
4L 74G 9
4N 1
IC1C 11
Tail
Head14 13
16 OFFB 18 B17
IA C13
D 7 K 4 J 6
Battery FL MAI N
3. 0W
G G W- B W- B
W- B
BB
V
LG W- B W- B
DCTY TAI L HEAD
* 1 : w/ Dayti me Running Light
* 2 : w/o Daytime Running Light(
*2)
E10
(
*1) (
*1)
IA1 9From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
Body ECU
Combination SW
Door Courtesy SW
Front LH
Fusible Link Block
Junction
Connector
Unlock Warning
SW
Light
Control SW

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With the ignition SW turned on, the current flows to TERMINAL (A) 5 of the body ECU through IG1 fuse.
Voltage is applied at all times to TERMINAL (A) 7 of the body ECU through the TAILLIGHT relay. Coil side, and to
TERMINAL (C) 3 through the HEAD LAMP relay coil side (w/o daytime running light) or through the DRL NO.2 relay (w/
daytime running light).
1. Normal Lighting Operation

With the light control SW turned to TAIL position, a signal is input into TERMINAL (B) 18 of the body ECU. Due to this signal,
the current flowing to TERMINAL (A) 7 of the body ECU flows to TERMINAL (B) 18 to TERMINAL 14 of the light control SW
to TERMINAL 16 to GROUND, and TAILLIGHT relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (B) 17 and (B) 18 of the body ECU. Due
to this signal, the current flowing to TERMINAL (C) 3 of the body ECU flows to TERMINAL (B) 17 to TERMINAL 13 of the
light control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes TAILLIGHT and HEAD LAMP (w/o
daytime running light) or DRL NO.2 relay (w/ daytime running light) to turn the lights on. The taillight circuit is same as above.
2. Light Auto Turn Off Operation
With light on and ignition SW turned off (Input signal goes to TERMINAL (A) 5 of the body ECU), when the driver's door is
opened (Input signal goes to TERMINAL (C) 11 of the body ECU), the ECU operates and the current is cut off which flows
from TERMINAL (A) 7 of the body ECU to TERMINAL (B) 18 in taillight circuit and from TERMINAL (C) 3 to TERMINAL (B)
17 in headlight circuit.
As a result, all lights are turned off automatically.
B9 (A), B10 (B), B12 (D) Body ECU
(D) 9-Ground : Always approx. 12 volts
(A) 5-Ground : Approx. 12 volts with the ignition SW at ON position
(B)17-Ground : Continuity with the light control SW at HEAD position
K4 Unlock Warning SW
2-1 : Closed with the ignition key in the cylinder
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B9A42C1342J643
B10B42D744K443
B11C42F738 (3MZ-FE)
B12D42F740 (2AZ-FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
323Engine Room R/B No.3 (Engine Compartment Rear Left)
System Outline
Service Hints

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Cruise Control for 3MZ-FE
1 11 4 12 5 10 8 2 3
G- YW P- L
+B BATT20A
EF1 NO. 1
B- W W- B
L- W
Y- R
Y- B
Y- G
L- Y
L- R
G- B
G- R
23 15
2B 4 2F 4 2B 52B7
Y
W
IK2 10 IK21110A
IGN
1G 6 20A
STOP
1E 1
4E 1
B BR
P
I 74M 4
EH1 2
4M 124L 3
1A A3A 9 B 19
A 8
BRW
D 10 D13 D11 D15 D17 D32 D 16 D 12 D14 9
L- B
E 1SL1- SL1+
18 D 19 D
B- WR- B
613IGSW STP
A
J 2MREL S4 SLT+ SLT- DSL SL2+ SL2-
W- B
SL3+ SL3- THO1
D
S15
EFI
Relay
IK3 13
B
B
9E
E
Y
G
GR
SB
LG
BR
R
OL
+B2 2A
WW
P W
B
SR
O
E
P V
B 12
ST1-4 3
R
10A
ETCS
2
W
B 6
+BMIC1 42 1
L- W
R
721G7. 5A
IG1
B 10
D 8IM1IM1 10
R Y
2
J 6P 1 V
THO SL3- SL3+ SL1- SL1+ SL2- SL2+ DSL SLT- SLT+ S4 SR
E2
7
BR D From Power Source System (
See Page 62)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
Electr onically Controlled Transmission SolenoidEngine Control Module
Junction
Connector
Junction
ConnectorA/T Indicator SW
Stop Light SW

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: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42E238 (3MZ-FE)P139 (3MZ-FE)
A11B42E5A42P544
A1742E6B42S1543
A2742E7E42S2739 (3MZ-FE)
B9A42E8D42S28A43
B10B42E9C42S29B43
C11A42G543S30A43
C12B42J239 (3MZ-FE)S31B43
C1642J643T1339 (3MZ-FE)
D342J743
E138 (3MZ-FE)J1643
: 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)
1E29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A
2B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2F
gg(g)
3A
3B
3C303D30
Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3EInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3F
3J313K31
4A
4D
4E33
4FCowl Wire and Passenger Side J/B (Right Side of Grove Box)
4H
g(g )
4L324M32
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IB252Front Door LH Wire and Cowl Wire (Left Kick Panel)
IC1
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IC4
g()
IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IK254Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IM154Engine Wire and Cowl Wire (Right Kick Panel)

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Cruise Control for 2AZ-FE
1 9 4 3 7 2 8
G- YW P- L
+B BATT20A
EF1 NO. 1
B- W W- B
L
Y- R
B- Y
Y- G
L- Y
L- R
23 15
2B 4 2F 4 2B 52B7
Y
W
IK2 10 IK21110A
IGN
1G 6 20A
STOP
1E 1
4E 1
B BR
P
I 74M 4
EH1 2
4M 124L 3
1A A3A 9 B 19
A 8
BRW
D 11 D13 D9D15 D32 D 12 D14
E10SL1- SL1+
18 D 19 D
B- WR- B
510IGSW STP
A
J 2MREL S4 SLT+ SLT- DSL SL2+ SL2-
W- B
THO
S15
EFI
Relay
IK3 13
B
B
E
E
R
O
G
G
Y
BR
O
+B2 2A
WW
P W
B
O
E
P V
B 12
ST1-4 3
R
10A
ETCS
2
W
B 6
+BMIC1 42 1
L- W
R
21G7. 5A
IG1
B 10
D 8IM1IM1 10
R Y
2
J 6P 1
BR THO SL1- SL1+ SL2- SL2+ DSL SLT- SLT+ S4
6 E2 7 D From Power Source System (
See Page 62)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
Engine Control Module
Electronically Controlled Transmission Solenoid
Junction
Connector
Junction
ConnectorA/T Indicator SW
Stop Light SW

2005 HIGHLANDER (EWD592U)
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: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42E5A42P141 (2AZ-FE)
A11B42E6B42P544
A1742E7E42S1543
A2742E8D42S2741 (2AZ-FE)
B9A42E9C42S28A43
B10B42E1040 (2AZ-FE)S29B43
C11A42G543S30A43
C12B42J241 (2AZ-FE)S31B43
C1642J643T1341 (2AZ-FE)
D342J743
E240 (2AZ-FE)J1643
: 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)
1E29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A
2B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2F
gg(g)
3A
3B
3C303D30
Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3EInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3F
3J313K31
4A
4D
4E33
4FCowl Wire and Passenger Side J/B (Right Side of Grove Box)
4H
g(g )
4L324M32
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IB252Front Door LH Wire and Cowl Wire (Left Kick Panel)
IC1
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IC4
g()
IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IK254Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IM154Engine Wire and Cowl Wire (Right Kick Panel)

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VSC and Tire Pressure Warning System
5
2 5
55IA1 IO2
MR 15 14
MRF1 2
IC2 6IC215
519 31
+BS RR+ RR-
1 2 FSW+
7
4J 3
4M 9
Y
R+ 45
B13
A25
28PKB
O
RL
1
S27
P 3ABS CUT RelayFL MAIN
3. 0W
Battery
WB
B- R
G- W
R- W B
GR
P Y
BRB B- OLG
B- R
2IO2
G- R
12 IA1
V RA24
RL- RL+6 2016 IC2 7IC22
1
Y- G
G
1 43CSW
41INIT
L- R
B- Y W W- B
W- B
IB
W- BT 6
4
121
P22
IC4 17 IC42
3J 44J6
ABS MTR Relay W- L
BM 25
1 89
50A ABS2 30A ABS1
5
5 5 51 51
32 32B- O
B
B
3F 13 4L74J 7
4N 1 4D 4 93G
IC
W- B
IL1 17 IC46
IF3 13
W
W- B
SB
P W- B
W- B W- B
IC4 11
LG
EH
W- B
1 GN D2
W- BF 7
(
*1) (
*1) (
*1) (
*1)
W- B 4C 3
W- B
ABS Speed Sensor Rear LH
ABS Speed Sensor Rear RH Br ake Pedal Load
Sensing SWFusible Link Block
Parking Brake SWPr essure SW
Skid Control ECU with Actuator
TRAC Off SW