Lexus ES300 (1997 year). Service manual — part 630

X

X

13 14 X 16

X X

1

1

1

1

2

1 2 3 4

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)

D D D

(HINT : SEE PAGE 7)

E E

E

(HINT : SEE PAGE 7)

A

F 6

C

F 8

F

F11

B

I15

A

BLACK

J18

B

BLACK

J19

C11

D 9

BLACK

J 2

J15

GRAY

J 8

116

LIGHT AUTO TURN OFF

A

1

C

1

F

1

F

2

E 2

FROM POWER SOURCE SYSTE

II

1J

7

1J

8

OFF

TAIL

HEAD

LI

G

H

T

CO

NT

R

O

L

S

W

1S

7

16

B–

G

B–

R

B–

R

B

B–

R

G–

R

G–

R

R

R–

B

R–

B

R–

G

R–

Y

W–

B

W–

B

W–

B

G

ON

CTOR

URTESY SW

H

TION

ECTOR

COMBINATION SW

C11

FUSIBLE LINK BLOCK

C

F 6

, F 8

A

INTEGRATION RELAY

I15

B

B

10A
GAUGE

BATTERY

13

14

, F11

FL MAIN
3. 0W

B

E

A

D

JUNCTION
CONNECTOR

B

J18

, J19

A

A

A

JUNCTION
CONNECTOR

J 8

100A
ALT

C

C

JUNC
CONN

J 2

A

JUNCTI
CONNE

J15

1

DOOR CO
FRONT L

D 9

40A
MAIN

2

1

2B

3

3

2

4

1

2K

8

7. 5A
DOME

M (SEE PAGE 56)

2J

12

HEAD
RELAY

2

3

1

5

1C

6

1B

4

TAILLIGHT
RELAY

1W

1

B

3

B

2

B

1

B

4

6

10

7

F

1

117

LIGHT AUTO TURN OFF

118

WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 7 OF THE INTEGRATION RELAY THROUGH GAUGE FUSE.
VOLTAGE IS APPLIED AT ALL TIMES TO TERMINAL B 2 OF THE INTEGRATION RELAY THROUGH THE TAILLIGHT RELAY (COIL
SIDE), AND TO TERMINAL B 3 THROUGH THE HEAD RELAY (COIL SIDE).

1. NORMAL LIGHTING OPERATION

(TURN TAILLIGHT ON).
WITH THE LIGHT CONTROL SW TURNED TO TAIL POSITION, A SIGNAL IS INPUT INTO TERMINAL B 1 OF THE INTEGRATION RELAY.
ACCORDING TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL B 2 OF THE REALY FLOWS FROM TERMINAL B 1

→

TERMINAL 14 OF THE LIGHT CONTROL SW

→

TERMINAL 16

→

TO GROUND AND TAILLIGHT RELAY CAUSES TAILLIGHT TO TURN ON.

(TURN HEADLIGHT ON)
WITH THE LIGHT CONTROL SW TURNED TO HEAD POSITION, THE SIGNALS ARE INPUT INTO TERMINALS B 1 AND B 4 OF THE
INTEGRATION RELAY. ACCORDING TO THESE SIGNALS, THE CURRENT FLOWING TO TERMINAL B 3 OF THE RELAY FLOWS TO
TERMINAL B 4

→

TERMINAL 13 OF THE LIGHT CONTROL SW

→

TERMINAL 16

→

TO GROUND IN THE HEADLIGHT CIRCUIT, AND

CAUSES TAILLIGHT AND HEAD RELAY TO TURN THE LIGHT ON. THE TAILLIGHT CIRCUIT IS SAME AS ABOVE.

2. LIGHT AUTO TURN OFF OPERATION

WITH THE LIGHTS ON AND THE IGNITION SW TURNED OFF (INPUT SIGNAL GOES TO TERMINAL 7 OF THE REALY), WHEN DOOR ON
FRONT LH SIDE IS OPENED (INPUT SIGNAL GOES TO TERMINAL 6 OF THE RELAY), THE RELAY OPERATES AND THE CURRENT IS CUT
OFF WHICH FLOWS FROM TERMINAL B 2 OF THE RELAY TO TERMINAL B 1 IN TAILLIGHT CIRCUIT AND FROM TERMINAL B 3 TO
TERMINAL B 4 IN HEADLIGHT CIRCUIT. AS A RESULT, ALL LIGHTS ARE TURNED OFF AUTOMATICALLY.

SYSTEM OUTLINE

I13

B

INTEGRATION RELAY

B

3–GROUND : APPROX. 12 VOLTS WITH THE LIGHT CONTROL SW AT OFF OR TAIL POSITION

B

2–GROUND : APPROX. 12 VOLTS WITH THE LIGHT CONTROL SW AT OFF POSITION

B

4–GROUND : CONTINUITY WITH THE LIGHT CONTROL SW AT HEAD POSITION

B

1–GROUND : CONTINUITY WITH THE LIGHT CONTROL SW AT TAIL OR HEAD POSITION
6–GROUND : CONTINUITY WITH THE FRONT LH DOOR OPEN
7–GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
1–GROUND : ALWAYS APPROX. 12 VOLTS

10–GROUND : ALWAYS CONTINUITY

SERVICE HINTS

119

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

C11

28

F11

F

26

J15

29

D 9

30

I15

B

28

J18

A

29

F 6

A

26

J 2

29

J19

B

29

F 8

C

26

J 8

29

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1B

1C

24

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

1J

24

(

)

1S

24

FLOOR WIIRE 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)

2J

20

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

2K

20

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

: GROUND POINTS

CODE

SEE PAGE

GROUND POINTS LOCATION

II

36

INSTRUMENT PANEL BRACE LH

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

E 2

34

COWL WIRE