Lexus ES300 (1997 year). Manual - part 629

112

P 1 

BACK–UP LIGHT SW (PARK/NEUTRAL POSITION SW)

2–8 : CLOSED WITH THE SHIFT LEVER IN R POSITION

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

J25

29

J37

30

R 9

31

J28

A

29

P 1

27

J29

B

29

R 7

31

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

IJ

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1S

24

FLOOR WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1V

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE

SEE PAGE

JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)

IK2

38

ENGINE WIRE AND COWL WIRE (UNDER THE GLOVE BOX)

IK3

38

ENGINE WIRE AND COWL WIRE (UNDER THE GLOVE BOX)

: GROUND POINTS

CODE

SEE PAGE

GROUND POINTS LOCATION

BN

40

UNDER THE LEFT CENTER PILLAR

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

B 9

40

FLOOR WIRE

B14

40

FLOOR WIRE

C

C

D

D

X

X

(HINT : SEE PAGE 7)

X

X

F

F

(HINT : SEE PAGE 7)

A

A

A

A

A

A

(HINT : SEE PAGE 7)

X

2

8

3

1

3

1

J25

J37

P 1

GRAY

R 7

R 9

A

J28

B

J29

X

A

A

A

X

X

X

(HINT : SEE PAGE 7)

X

X

SERVICE HINTS

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

IJ1

7

IG1

10

B

E

A

E

IG1

1

E 2

F

2

F

1

C

1

A

1

B

B

A

B

R–B

G–R

R

R

R

R–

G

R–

G

W–

B

B–

G

B

B–

R

B–

R

B

–

R

G

–

R

R–

B

R–

B

JUNCTION
CONNECTOR

B–

R

R–

B

R–

B

G–

R

G–

R

J

UNC

T

IO

N

CO

NNE

CT

O

R

B

J3

4

, J3

5

A

C

, 

F

 8

J

U

NCT

IO

N

C

O

NNE

CT

O

R

UNCTION

ONNECTOR

9

JUNCTION
CONNECTOR

B

J10

, J11

A

10

0A

 A

L

T

F

U

SI

BL

E 

L

IN

K

 BL

O

C

K

F 6

A

F1

1

F

, 

FL MAIN
3. 0W

BATTERY

COURTESY

ONT LH

A

F

A

F

J

UNCT

IO

N

CO

NN

E

C

T

O

R

J10

A

1

A

II

J15
JUNCTION
CONNECTOR

2

1

5

7

A

E

C

A

3

6

A

C

E

A

R–

G

W–

J 5

J 2

J
C

J1

AUTOMATIC LIGHT
CONTROL SENSOR

A32

R–

L

DOOR 
SW FR

D 9

JUNCTION
CONNECTOR

J 8

T

H

IG

B

A

CTY

OFF

TAIL

HEAD

LI

G

H

T

CO

NT

RO

L

 S

W

AUTO

12

16

W–

B

R–

L

COMBINATION
SW

C11

15A
ECU–IG

1D

8

7. 5A
DOME

2J

12

1W

1

1G

8

3

2

1

2

2B

3

1

4

H

EAD

RE

L

A

Y

40

A

 MA

IN

2G

3

2K

8

1

2

3

1C

6

1B

4

5

TA

IL

L

IG

H

T R

E

L

A

Y

1G

1

1S

7

1J

8

1J

7

B

113

AUTOMATIC LIGHT CONTROL

114

WITH THE IGNITION SW TURNED ON, CURRENT FLOWS FROM THE ECU–IG FUSE TO TERMINAL 1 OF THE AUTOMATIC LIGHT
CONTROL SENSOR. VOLTAGE IS APPLIED AT ALL TIMES TO TERMINAL 2  OF THE AUTOMATIC LIGHT CONTROL SENSOR
THROUGH THE DOME FUSE, AND TO TERMINAL 7 OF THE AUTOMATIC LIGHT CONTROL SENSOR THROUGH THE TAILLIGHT
RELAY (COIL SIDE), AND TO TERMINAL 5 OF THE AUTOMATIC LIGHT CONTROL SENSOR THROUGH THE HEAD RELAY (COIL
SIDE).

AUTOMATIC LIGHT CONTROL

WHEN THE LIGHT CONTROL SW IS AT AUTO POSITION, IF THE AUTOMATIC LIGHT CONTROL SENSOR DETECTS A DECREASE
IN THE AMBIENT LIGHT (TO BETWEEN APPROX. 90 AND APPROX. 475 LUX), THE AUTOMATIC LIGHT CONTROL SENSOR IS
ACTIVATED. ABOUT 5 SECONDS AFTER IT IS ACTIVATED, CURRENT FLOWS FROM TERMINAL 6 OF THE SENSOR TO TERMINAL
12 OF THE LIGHT CONTROL SW 



 TERMINAL 16

  

 GROUND,  LIGHTING UP THE HEADLIGHT AND TAILLIGHT.

IF THE AMBIENT LIGHT DROPS BELOW APPROX. 90 LUX, THE AUTOMATIC LIGHT CONTROL SENSOR IS ACTIVATED AND
ABOUT 3 SECONDS LATER, CURRENT FLOWS FROM TERMINAL 6 OF THE SENSOR TO TERMINAL 12 OF THE LIGHT CONTROL
SW 



 TERMINAL 16

  

 GROUND,  LIGHTING UP THE HEADLIGHT AND TAILLIGHT.

WHEN THE LIGHT CONTROL SW IS AT AUTO POSITION AND ACTIVATION OF THE AUTOMATIC LIGHT CONTROL SENSOR HAS
TURNED ON THE HEADLIGHTS AND TAILLIGHTS, IF THE AUTOMATIC LIGHT CONTROL SENSOR DETECTS THE AMBIENT LIGHT
ABOVE APPROX. 1000 LUX, THE SENSOR IS TURNED OFF AFTER ABOUT 5 SECONDS. SO THE CURRENT FROM TERMINAL 6
OF THE SENSOR TO TERMNAL 12 OF THE LIGHT CONTROL SW IS CUT OFF, AND THE HEADLIGHTS AND TAILLIGHTS TURN OFF.

A32  

AUTOMATIC LIGHT CONTROL SENSOR

2–GROUND : ALWAYS APPROX. 12 VOLTS
1–GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
6–GROUND : CONTINUITY WITH THE LIGHT CONTROL SW AT AUTO POSITION
3–GROUND : CONTINUITY WITH THE DRIVER’S DOOR OPEN

C11

 COMBINATION SW

12–16 : CLOSED WITH THE LIGHT CONTROL SW AT AUTO POSITION

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

A32

28

F11

F

26

J11

B

29

C11

28

J 2

29

J15

29

D 9

30

J 5

29

J19

29

F 6

A

26

J 8

29

J34

A

29

F 8

C

26

J10

A

29

J35

B

29

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1B

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1C

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1D

24

INSTRUMENT PANEL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1G

24

INSTRUMENT PANEL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1J

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1S

24

FLOOR WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)

1W

24

COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL

2B

20

ENGINE ROOM MAIN WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)

2G

20

ENGINE ROOM MAIN WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)

2J

20

COWL WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)

2K

20

COWL WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE

SEE PAGE

JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)

IG1

36

INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT SIDE OF INSTRUMENT PANEL J/B)

IJ1

38

INSTRUMENT PANEL WIRE AND COWL WIRE (UNDER THE GLOVE BOX)

: GROUND POINTS

CODE

SEE PAGE

GROUND POINTS LOCATION

II

36

INSTRUMENT PANEL BRACE LH

SYSTEM OUTLINE

SERVICE HINTS

115

AUTOMATIC LIGHT CONTROL

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

E 2

34

COWL WIRE

1 2 3 X 5 6 7 X

X

X

12

X 16

X X

1

1

1

1

2

C C C

(HINT : SEE PAGE 7)

A

A

A

A

A

A

(HINT : SEE PAGE 7)

A

A

A

A

A

A

(HINT : SEE PAGE 7)

X

X

E

E

F

F

(HINT : SEE PAGE 7)

X

X

(HINT : SEE PAGE 7)

A

A

A

A

A

A

(HINT : SEE PAGE 7)

E

E

E

(HINT : SEE PAGE 7)

B

B

(HINT : SEE PAGE 7)

B

B

(HINT : SEE PAGE 7)

A32

BLACK

C11

D 9

J  2

BLACK

J  5

GRAY

J  8

GRAY

J15

J19

BLACK

A

F 6

C

F 8

A

J10

B

J11

F

F11

A

BLACK

J34

B

BLACK

J35

E

E