Lexus SC300 / Lexus SC400. Manual - part 994

OVERALL ELECTRICAL WIRING DIAGRAM

1

2

34

16

LE

XU

S

S

C

300

4

AC

C

IG

1

ST

1

IG

2

AM

1

2

1

11

A

M

2

3A
4

1J
7

1B
5

1J
5

2

1J
5

3C
4

1B
4

1E

12

1K

13

2

1K
4

3E
13

A

8

3D

13

1H

10

16

IE

1

15

IG

1

10

IK

1

2I

J

2

1I

J2

9

IJ

2

7

IG

2

4

3

2

IE2

6

IE2

1

IE2

5

IE

2

1

1

IE2

1

0

IE

2

M

EA

IG

1A

C1

4

A

3F
43

E

3

Y

Y

B–R

R

W –R

R

BR –Y

P

W

G–W

Y–B

P–B

R–W

R–L

L

W–B

R–B

LG–

R

P

LG

G–R

B–W

Y–B

Y–B

P–B

P–B

R –B

LG–R

P

LG

G –R

W–R

W –R

W

R

W –R

R

BR –Y

P

W–L

W

W

W–B

W–B

W–B

R –L

R–L

B–W

16

1

20

9

23

22

3

15

10

13

10

4

1

1

15

5

6

1

3

4

18

1

3

2

4

25

26

1

2

11

67

5

123

MC

MO

VR

3

VR

2

VR

1

GN

D

CC

S

CM

S

PK

B

TC

PI

100A

AM

1

120A

ALT

60A

MA

IN

30A

AM

2

30A

IN

J

B

B

AT

T

N

&

C

EC

T

ID

L

O

D

S

PD

S

T

P

+

S

T

P

–

L

Y–B

3H

12

B

(U

SA

)

(CA

NADA

)

6

W

4

W–

R

BA

T

T

ER

Y

CR

UI

S

E

CO

NT

RO

L

IND

ICA

T

O

R

L

IG

HT

[C

O

M

B.

M

E

TE

R

]

T6

TD

C

L

(T

ot

al

D

ia

gnos

tic

C

o

m

m

uni

c

at

io

n

Li

n

k)

C3

CH

E

C

K

CO

NN

E

CT

O

R

F9

F

U

SE

BL

O

C

K

C1

5

CR

UI

S

E

CO

NT

RO

L

S

W

[C

O

M

B.

SW

]

CA

NC

E

L

RE

S

U

M

E

/

AC

C

E

L

SE

T

/

C

O

AST

MA

IN

C8

CR

UI

S

E

CO

NT

R

O

L

A

CT

U

A

T

O

R

P

O

TE

N

TI

O

M

E

TE

R

MAG

NE

TIC

CLUT

C H

C1

9

CR

UI

S

E

CO

NT

RO

L

E

CU

S12

ST

OPL

IGH

TS

W

Fro

mS

top

Ligh

tS

W

<4–6

><5–6

>

Fro

m”

ST

O P

”

Fuse

<4–6

><5–6

>

From

C om

bin

ation

M et

er

<2

1–5>

From

Eng

ine

and

EC

TE

CU

<3–4

>

10A

GA

UG

E

15A

EC

U–I

G

10A

D O

ME

7.5A

ST

B–

W

B–

Y

W

40A

IG

SW

C

rui

se

C

ont

ro

l

14

5

47

14

9

Po

w

e

r

S

our

c

e

C1

2

B

,

C

1

4

A

TC

A/

D

T

C

To

Park

ing

Bra

ke

SW

<21–

2>

13

IG

1

P–B

P–B

To

Engin

ean

dE

C T

EC

U

<3–3

>

From

Eng

ine

and

EC

TE

CU

<3–2

>

8

I1

5

IG

N

IT

IO

N

S

W

Ins

tr

u

m

e

nt

p

ane

l

br

ac

e

LH

Fr

o

n

t

sid

e

o

f

ri

ght

fend

er

2

1

CR

UI

S

E

CO

NT

RO

L

IN

DI

CA

T

O

R

L

IG

H

T

[C

O

M

B

.

M

ET

ER

]

20

B

C1

2

B

VR

1

V

R

2

V

R

3

M

C

L

MO

GN

D

12

21

IJ

1

6

IJ

Z

10

B–

W

B–

W

B

B–

W

B–

W

B–W

B–W

B–W

2

(M/

T

)

(A/T

)

C2

3

CL

UT

C

H

ST

A

R

T

SW

C2

4

CR

UI

S

E

CO

NT

RO

L

CL

UT

CH

S

W

(M/

T

)

(A/T

)

10

11

12

13

17

1

8

19

2

0

21

12

34

5

6

78

9

14

15

1

6

17

1

8

1

2

345

6

789

1

0

23

22
21
20
19

15
14
13
12

11

16

MEMO

OVERALL ELECTRICAL WIRING DIAGRAM

1

2

34

17

LE

XU

S

S

C

300

(C

ont

.

ne

xt

pa

ge

)

4

AC

C

IG

1

ST

1

AM

1

3

2

1J
7

1B
21

J

51

J

82

2

1B
51

E

11

1E
51

K

7

1K

13

1I

14

22

1H

10

1B
4

1

4

9I

J

1

4I

J1

9I

E

1

8B

Y

1

8

B

T

1

1

4

IE

1

7

BT

1

9

IP

1

1

7

IG

1

1

5

IF

2

1

4

IF

2

1

2

8A

+B

2

2A

IG

7B

AC

C

4B

SH

20

A

+B

1

5B

HE

A

D

13

B

TA

IL

1A

SR

L

Y

11

B

HO

R

N

8B

DS

W

P

10

B

DS

W

L

12

B

DS

W

H

1B

LU

G

5A

TO

19

A

TS

W

6A

KSW

14

A

L1

10

A

UL

3

3

1

2

1

1

2

2

1

1

BL

BM

EA

IF

3F
7

3A
1

18

1E

10

1D

1

1J

16

A

E

15

A

UL

1

18

A

UL

2

17

A

LS

WP

5I

F

2

4I

F

2

5I

P

1

1

4I

P

1

8

IP

1

1

9

IP

1

12

A

PC

T

Y

7A

LS

W

P

4A

AC

T

+

3A

AC

T

–

11

A

LS

WD

13

A

DS

W

D

LO C

K

U N

LO

C K

IJ

IF

20

IP

1

2

31

1

3

2

LO C

K

U N

LO

C K

1

2

8

LO C

K

U N

LO

C K

1

3

2

LO C

K

U N

LO

C K

G–

W

G–

Y

Y

R–

B

W–

L

L–

W

L–

R

P–

B

R–

W

R

G–

Y

G–

W

W–B

W–B

W–

B

W–

B

W–

B

G–

Y

R–

B

G–

L

W

R

R–Y

G–W

L–O

G–R

Y–R

R –W

P–B

L–R

L–W

W–L

R–B

R

W

B–O

L–R

B–R

L–W

L–W

W

W

W

R

W

W–L

W

W –L

W–L

W

L–R

L–G

G–L

R–W

B

W–B

L

Y

G–Y

G

R–B

G–L

G–Y

G–W

G–W

G –Y

G –L

R–B

G –L

R–B

G

G –Y

W–B

W–B

W–B

W–B

R

W–B

W–B

W–B

W–B

W–B

R –L

B–Y

B–O

4

1

3

2

60A

MA

IN

100A

AM

1

120A

ALT

40

A

IG

S

W

F9

FU

S

E

B

L

O

C

K

I1

5

IG

N

IT

IO

N

S

W

30

A

DO

O

R

15

A

EC

U

–

IG

15

A

CI

G

25

A

HA

Z

–

HO

R

N

10

A

DO

M

E

T1

TH

EF

TD

ETER

R E

N T

H O

R N

T

H

E

F

T

D

ET

ER

R

E

N

T

A

N

D

D

O

O

R

L

O

C

K

EC

U

F10

FU E

LL

ID

OP

ENER

SW

L–R

L–G

G –L

R –W

B

L

BA

T

T

E

R

Y

F14

FU

ELL

ID

OPE

NE

R

SO LE

N O

ID

L5

LU

GGAGE

CO

MP

AR

TM

EN

T

KEY

U N

LO

CK

SW

E5

EN

G IN

EH

OO

D

C O

U R

TE

SY

SW

To

Lugg

ageC

om pa

rtm

ent

Ligh

tS

W <

6–

3>

L4

LU

GGAGE

COM

PA

RT

ME

NT

DO

OR

O P

ENER

MO

TO

R

L1

LU

G G

AG

EC

OM

PAR TM

EN T

D O

O R

O PEN

ERSW

To

UNLO

C K

WA

RN ING

SW

<4–4

><5–4

>

D7

DO

OR

KE

YL

O C

KA

N D

UN LO

CKS

WL

H

P5

DO

OR

LO

C K

C O

N T

R O

LS

WL

H

[P

OW

ER

W IN

DO

WM

AST

ERSW

]

From

H ea

dlight

R el

ay

<4–2

><5–3

>

Fro

mT

aillig

htR

ela

y

<4–3

><5–3

>

From

Ste

rte

rR

elay

<1–3

><2–2

>

Fro

mH

orn

Rel

ay

<1

3–1>

To

Pow

erM

ain

Rel

ay

<1

2–4>

D9

DO

OR

LO

C K

C O

N T

R L

SWR

H

D8

D O

O R

KE

YL

OC

KA

ND

U N

LO

C K

SW

RH

Po

w

e

r

S

our

c

e

Thef

t

D

et

er

rent

and

D

oor

Lock

C

ont

rol

W –L

B–Y

R –L

6

2

7

T8

B

,

T9

A

From

Tilt

and

Pow

er

Tel

escopi

cE

CU

<1

1–1>

Y

U

nde

r

th

e

ce

nt

e

r

pil

la

r

R

H

Ba

ck

pan

el

ce

n

te

r

Fr

o

n

t

si

d

e

o

f

ri

gh

t

fen

der

Lef

t

ki

c

k

pa

nel

Le

ft

k

ic

k

p

ane

l

R

ight

k

ic

k

pa

nel

R –B

M

6

5

5

6

2I

G

1

9A

ToT

rip

SW

and

Thef

tD

eter

rent

Indi

cat

orLi

ght

<21

–4>

G –B

G–

B

IN

D

5

6

7

8

17 LEXUS SC300(Cont’ d)

1I

16

4

4

1D

8

4

4

16 IF2

18 IF2

18 IP1

6 IP1

15 IP1

7 IF2

7 IP1

20 IP1

1D

10

1J

1

IF

IJ

6

4

5

5

4

6

3

1

2

2

1

3

M

M

16 BX1

9 BX1

8 BX1

2 BX1

11 BX1

15 BX1

3 BX1

7 BY1

3A

6

3E

7

2

4

5

6

10

9

3

1

7

2

3

BL

R

R–W

P–B

L–R

L–W

W–L

R–B

Y

G–Y

G–W

P–B

W–L

G–L

L–W

L–W

L–W

L–R

L–R

W–B

R–W

W–B

L–

W

R–

W

R–

W

R–

W

P–

B

L–

W

L–

W

L–

W

W–B

L–

R

L–

R

L–

R

W–B

W–

B

W–

B

R–

W

P–

B

L–

W

L–

R

R–

W

G

–

L

W–

L

L–

W

G–

W

G–

Y

Y

G–

L

W–

L

P–

B

R–

L

W–

B

W–

B

R–

L

P–

B

W–L

G–

L

Y

G–

Y

G–

W

L–

W

RR

L–

W

P–

B

2

2

1

1

DI

O

DE

DI

O

DE

D10
DOOR LOCK MOTOR,
DOOR UNLOCK DETECTION SW
AND DOOR OPEN DETECTION SW
LH

D11
DOOR LOCK MOTOR,
DOOR UNLOCK DETECTION SW
AND DOOR OPEN DETECTION SW
RH

LSWD

UL

L

ULSW

CTY

LSW2

LSWP

+B

GND

W 7
WIRELESS DOOR LOCK
MAIN SW

W 8
WIRELESS DOOR LOCK ECU

Theft Deterrent and Door Lock Control

F

rom

In

te

g

rat

io

n

R

el

ay

<

4–

3>

<

6–

3>

From Integration Relay
<4–3><5–3>

From Integration Relay
<4–3><5–3>

G–L

From Door Courtesy
Light LH<6–3>

R–W

From Integration Relay
<4–3><5–3>

L–

W

Wireless Door Lock Remote Control

P–B

THEFT DETERRENT AND DOOR LOCK ECU

6

4

3

2

1
7 8 9 10 11 12

14

5

13

1

3

2

4 5

6 7

8 9

10 11 12

13 14 15 16 17 18

19 20

T 8 B

T 9 A

ORANGE

ORANGE

Left kick panel

Right kick panel

Under the center
pillar RH