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
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