Lexus ES300 (2002 year). Manual — part 3

106

Headlight (w/ Daytime Running Light)

1

1

1

3

2

5

4

1

1

1

2

1

E 4

EC

DR

L

N

O

. 3

Re

la

y

B

9

B

11

A

1

A

2

3A

85

3A

55

H

ead

(US

A

)

H

igh B

eam

3B

82

3B

62

3B

72

3B

92

(* 1)
(* 2)

(* 1)
(* 2)

R(USA)

R–B

W–B

W–B

W–R

R–Y

H

eadl

ight

R

H

(Hi

g

h

)

H 7

IF7

10

IF5

6

A

F

B

D

J

unc

ti

on

C

onne

c

tor

J 8

(A

), J

9

(B

)

SB

R

R–

L

R–

L

R

R–

L

R

R–

W

R–

L

W–

L

W–

B

R–

B

W–B

W–

B

W–

B

SB

W–

L

SB

W

W–

B

R–

Y

(US

A

)

(US

A

)(

US

A

)

C

o

m

b

inat

ion Met

e

r

C 7

(A

), C 8

(B

)

* 1 : w/ VSC
* 2 : w/o VSC

P

B

7

P

(C

anad

a

)

(US

A

)

(US

A

)

2

1

D

a

y

ti

m

e R

unn

in

g

Li

ght

R

e

s

is

tor

D1

9

IF5

3

W–

L

W–

L

107

Daytime Running Light Operation

When the engine is started, a signal from the generator is input into TERMINAL (B) 18 of the body ECU. At this time, if the
parking brake pedal is depressed (Parking brake SW ON), the body ECU is not activated, and the daytime running light
system does not operate.
When the parking brake pedal is released (Parking brake SW OFF), a signal is input into TERMINAL 18 of the body ECU.
This activates the body ECU and the headlight turns on.

HEAD Relay

3–5 : Closed with the light control SW at HEAD position or dimmer SW at FLASH position

Closed with the engine running and the parking brake pedal depressed (Parking brake SW off)

B4 (A), B5 (B) Body ECU

1–Ground : Always approx. 12 volts

(B) 18–Ground : Approx. 12 volts with engine running

18–Ground : Continuity with parking brake pedal depressed
17–Ground : Continuity with the dimmer SW at HIGH or FLASH position

(A) 8–Ground : Continuity with the light control SW at TAIL or HEAD position

12, 24–Ground : Always continuity

: Parts Location

Code

See Page

Code

See Page

Code

See Page

B4

A

38

G2

36

H8

36

B5

B

38

H3

36

J4

39

C7

A

38

H4

36

J8

A

39

C8

B

38

H5

36

J9

B

39

C11

38

H6

36

P5

39

D19

36

H7

36

: Relay Blocks

Code

See Page

Relay Blocks (Relay Block Location)

1

22

Engine Room R/B (Engine Compartment Left)

: Junction Block and Wire Harness Connector

Code

See Page

Junction Block and Wire Harness (Connector Location)

1C

1E

1F

25

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

1G

g

g

(

g

)

1H

2B

28

Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

2F

28

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

2G

28

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

2M

29

Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

2R

29

Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

3A

34 (w/ VSC)

3A

35 (w/o VSC)

Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)

3B

34 (w/ VSC)

Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)

3B

35 (w/o VSC)

System Outline

Service Hints

108

Headlight (w/ Daytime Running Light)

: Connector Joining Wire Harness and Wire Harness

Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IF5

46

Engine Room Main Wire and Instrument Panel Wire (Right Side of Steering Column Tube)

IF7

46

Engine Room Main Wire and Instrument Panel Wire (Right Side of Steering Column Tube)

IL1

48

Engine Wire and Instrument Panel Wire (Behind the Glove Box)

: Ground Points

Code

See Page

Ground Points Location

EB

44

Right Fender

EC

44

Left Fender

IA

46

Instrument Panel Reinforcement LH

IB

46

Instrument Panel Brace LH

ID

46

Instrument Panel Brace RH

: Splice Points

Code

See Page

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

E1

44

Engine Room Main Wire

E4

44

Engine Room Main Wire

110

Headlight (w/o Daytime Running Light)

From Power Source System (See Page 56)

2

40A
MAIN

1

5

2

3

1H

11

1F

3

2F

3

OFF

Tail

Head

Low

High

Flash

Li

ght

C

ont

ro

l S

W

D

imme

r S

W

2A

3

A

9

A

10

7

13

8

16

A

IB

2R

8

2B

11

IA

ID

SGND

GND

HU

HF

HEAD

HRLY

17

12

24

10A
ECU–B

B

SIG

10A
ECU–IG

A

8

TAIL

14

1

9

15

H

EAD

R

e

la

y

1

R–

B

R

R–

Y

R

R–

B

R–

B

W–

B

BR

Body ECU

B 4(A)

Combination SW

C11

W–

B

W–

B

BR

R

R

W–B

1F

4

R

A

Junction
Connector

J 4

2N

6

R–

B

10 2G

2G

9

R–

B

W

R–B

R–B

W