1991 LEXUS SC400 sensor

OVERALL ELECTRICAL WIRING DIAGRAM
1234
8 LEXUS SC300 (
Cont . ne xt pa ge )
4 ACC
IG1
ST1
AM1 2
1J
7 66 66 66 66
21J
5
1B
4 6666
66 66 66 2 1I
8
4 3 5 4
2
4 3
2
1 4
3
2
1 6
4
3
1
71124 1F 2F 3F
AABA A A B
C
B
A
B
A
A
A
A
A
A
BAABAABBB A A A A A B GGGF F
F
M
15 2 12 1 25 21 24 10 1 9
1 1326128 7 222 13 5 18 16 17 4 4 7IE2
1IO1
2 3
1 2
1
6
EB EA IJ M
2Bc2
12 IE2
H
4H 5H6H1H 2H3
I
2I 1J1
SFR SFL SRR SRL AST MT BSR BSM BSA
BS BM GND E2 PR VC SRC SMC SAC
MTT
BT M
EM2
BBBBBBBC
C
C
C
C
C
C
C
C
C
C
B
B
C 9IO1
EB1
6
10 IO1
3BW1 8BW1
6Bc2 5Bc2 2BW1 6BW1
7BW1
3B
1
221 1 112 2 320 741361511 7 81214 510
15 5 14 3 8 6 17
SFR SFL SRR SRL AST MT GND1 GND2 GND3 FL+ FL± FSS FR+ FR± RL+ RL± RSS RR+ RR± ALT LVL1 PKB W
B± Y
B±R
B±R R
VL
P± B
V±W R±B P
Y± B
LG
LG±B P± L
P± G
V±R
L
GR B
R± W
W±B (
SHIELDED )(
SHI ELDED)
B± R B± R
W± B L± Y G
V±Y
R± W
W± B MTT SR MR TMR E2 PR VC SRC SMC SAC TSR R± BAT I G STPTS WA TC D/G ABSO
RLORRO
FL OFRO
BRFA THFA
BRCBRP
TRCO NL PW±LR
Y
W
W
L±W B±R
R±B
L
Y R
V±Y
V±Y
V±Y
W
B±Y
R
R±W R
B±R
B±R
R
G± W
G±W B±Y
L±Y
R± B
Y
G
( SHI ELDED )
W
B
R
V± Y
V
V± W R± W R±W R±W
B±R V±Y W
W± L
V L
P±B
W± B W± B W± B
L±W Y± G
P± B P
B± Y
Y
L±W
L
W± B
W± B W± B
W
B
O±L
W± L W
O
O
W
W
O
L±GL±Y
L±G
L±Y Y±G Y±G
B
R±W
LR±W
B±Y V±R P± GP± L
LG±B LG
Y±B
P
R± B R±B V± W B±R B±R
V± Y
W±B W±B
(SHIELDED )
(
SHI EL DED )
(
SHI ELDED )I15
IGNITION SW
40A
IGSW
4 2 1456
R
T5
TRACTION PUMP
A N D MOT ORTRACTI ON BRAKE
ACTUATOR
ABS AND T RACTI ON ECU
60A MAIN
30A ABS NO. 2 60A ABS
NO. 1100A AM1
ABS
ACTUATOR
RELAY
ABS MOTOR
RELAY
TRACTION MOTOR
RELAY
TRACTION BRAKE
MAI N RELAY
10A DOME
6 BATTERY AB S A CT UA TOR
(SHI ELDED ) W± B
A7
ABS SPEED SENSOR
FRONT LH
A8
ABS SPEED SENSOR
FRONT RHA30
ABS SPEED SENSOR
REAR LH
F9
FUSE BLOCK
B±Y
From Stop Light
SW<4±6><5±6>
5BW1
A31
ABS SPEED SENSOR
REAR RH
From Alternator
º Lº < 1±2>
Power
Source ABS and Traction Control
B±R15A ECU±IGY
23 22 16 9 20 10 19
T3 ,T4
FG
(
SHI ELDED )
A4 , A5 , A6
HJ I A2 4 A , A25 B , A2 6 C
W
120A ALT
R
Fro nt s id e of
left fenderRight kick panel
Fr ont side of
right f ender
1
3
WhereEverybodyKnowsYourName

567 8
8LEXUSSC300(
Cont ' d )
22 11 4 14 8 1716 23
1B
5
3A
6 3E
3
3B
3 1E
11 3H 12
18 IK2 15 IK2 12 IJ 2 7IO1 8IO1
9IK2 5IK2 4IK2
2IK2 10IK1
23 E BRP
4E
TRCO 1D
BRC 5E
THFA 4D
BRFA 10 D
FRO 3D
FL O 12 D
RRO 5D
RLO 15 D
ABSO 8D
BAT 2E
IG1 6D
TC 16 E
TR5 11 D
IND 14 D
WT 5
K
15 K
1
K
7D P
16 D N
1EPKB
13 IK2 3H
7
From A/ T Indicat or SW
[ NEUTRAL START SW AND
BACK±UP LIGHT]< 3±7> 26 E
BCM
25 EB±
24 EB
11 E A
12 EA±
13 EACM
14 EGND
13 DCS W
3ES1
15 E
BM 2D
STP 21 E
TR2 6E
NE O 8E
VT H 19 E
VSH 10 E
IDL1 22 E
IDL2
6 2
16 IK2
13 IJ1 3H
14
1E
18 3A
2
1J
1
IJ IF EE
213645
BCM B± B A A± ACM 1J
52
3A
4
3D
13 1E
12 2 13 14
5EE1
1
L
To Engine and
ECT ECU< 2±8>
10A
GA U GE 7. 5A
TRAC
From Stop Light SW
<5±6><4±6>
From Trottle Position
Sensor< 2±8>
FromSubThrottlePosition
Sensor< 2±8>
WB±Y
L
V± R
P±G P±L
LG±B LG
Y±B P
R± B
V±W P±B L
V
R
B± R B± R
R±W L
GR
B
R±W GR
L V± W
P±B
WA TC TC ABS W TRC
B±Y
V± R
P±G P±L
LG±B LG
Y±B
P
R±B
R
B±R RR
R±B
B±Y
W
L±R Y
Y
L±R
G±W
Y± RP±L
V±Y
Y±L R
R±B
BR
Y± R
W± B
BR
G
W L
R Y B
B
W± B Y± R
W±B
W±B
W± B
BR L
GR
L
L
P±B
L±Y W
LG±R LG±R W P±B
V± W L±G
W
P±B
P±B
P±B
W±B
R± W
W
B±Y
TS WB
C3
CHECK
CONNECTOR T6
TDCL
(
Total Diagnstic
Communic ation Link )
TRACTION ECU ABS WARNI NG AND
TRACTION OFF INDICATOR
AND TRA CT I ON I NDI CA TOR
LI GHTABS
TRAC OFF
S8
SUB THROTTL E
ACTUATOR
T12
TRACTION CUT SW (
SHI ELDED )
ABS and Traction Control
To Parking Brake SW
(
Canada )
< 21±2>
To Brake Fluide Level SW
( USA )
< 21±2>
To Parking Brake SW
< 21±3>
C1 3 , C14 KL
T1 3 , T1 4 DE 7IJ2
L±R
ABS AND TRACTION ECU TRACTION ECUABS WARNING AND TRACTION OFF INDICATOR AND
TRA CT I ON I NDI CA TOR L I GHT
Right k ick panel Left k ickpanelRea r
side of
cylinder
head LH
G±W
E
E1
20
To Engine and
ECT ECU< 2± 8> BRBR
BR
1234 67891011
14 15 16 17 18 24
512
25 26
20
19 21 22 23 13 12345 7 891011
1214 15 16 17 18 22
6
19 20 21
13 12345678
16
15
14
13
12
11
10
9 12345678
16
15
14
13
12
11
10
9 1234 67891011
14 15 16 17 18 24
512
25 26
20
19 21 22 23 13
A
A2 4 B A2 5 CA26 DT13 DARK GRAY E T1 4 DARK GRAY
12 34 56 78
910 111213 141516 1718
17 18
1 2345 6789 10
23
22
21
20
19
15
14
13
12
11 16
K
C13 L C14 123
456
12
34
F
T 3 BLACK G T4 BLACK
WhereEverybodyKnowsYourName

OVERALL ELECTRICAL WIRING DIAGRAM
1234
9 LEXUS SC300
4ACC
IG1
ST 1
AM1 2
4 32
1
66 66
3H
12
1J
7
1B
4 666
66
3H
13 10IK1 25IK2 2IK2
5IO1 7IO1 1E
12 1I 82
1J
52
3A
4
3D
13 7IE2
3 BW1 8 BW1 7 BW1 2 BW1 6 BW1 5 BW1
2 Bc2 6 Bc2 5 Bc2
EB EA I J 12 IE2
M
4 3
5 4
2
6 6EB1
8 I O1 2 I O1
5A 4A 11A 21B 17B 6B 10B 11B 22B
1D 4D 3D 2D 5D
3C 1C16B 2B 13B 3A 10A 2A 1A 7A 14B 3B
1B6A12A8A9A 19 B 20 B
15
F 1
G
RR±
RR+
RL ±
RL+
FR±
FR+
FSS
FL ±
FL+
GN D3
GND2
PKB
MT
AST
SRR LY
B± R
ABS TC TC TS WAV±W
P± B
P±B VL
Y
B±R
R
L
L V
P±B
B±R
W±B
L±WB±R B±Y
R
V±Y
V± Y
W
W±L
R±YY± LL
B±R
W
Y
B±Y
P
Y±G
L±W
L±W
L
W± B
W± B
W± B
W± B
W± B
W
B W± B V±W
P±B
VL
O±L
W± L W
O W
O
L±G L±Y
L±Y
L±G
O
W
R
R± Y
V±Y
Y±L
221 1 112 2
14 4 111622
6 23
B±Y
W
L
R
W
SFR SFL
8BRS S
W± B V± Y
WB
40A I GSW I15
IGNITION SW
ABS MOTOR
RE LA Y ABS ACTUATOR
RELAY
T6
TDCL
(
Tot al Diagnos tic
Communic ation Link )
C3
CHECK CONNE CT OR
BATTERY F9
FUSE BL OCK
ABS ACTUATOR A7
ABS SPEED
SENSOR FRONT LHA8
ABS SPEED
SENSOR FRONT RHA3 0
ABS SPEED
SE NS OR RE A R L H A31
ABS SPEED
S ENSOR RE AR RH
ABS WARNING LIGHT
[COMB. METER]
10A
GAUGE
10A
DOME
15A
ECU±I G
ABS ECU (
w/oTractionControl )
ABS(
Anti±Lock Brake System )
To Par ki ng Brak e SW
< 21±2> R±W
( SHI ELDED )
( SHI ELDED )
( SHI ELDED )
(
SHIELDED ) (
SHI ELDED )
BAT
IG1
W
TS
TC
D/G
MR
R±
SR
60A MAIN
60A ABS
NO. 1
100A AM1
120A ALT
SFR SFL SRR AST MT
BM GND 3E
3
Power
Source4
2
7
6
R
BS
A4 , A33DC
B±R
C13 , C14 FG 2
1
A22 , A23 AB
W± B
W± B
W± B
P±B
ABS ECU
(w/oTractionControl )
ABS ACTUATOR ABS WARNING LIGHT
[COMB. MRTER]
Fro nt s id e of
left fender Fr ont side of
right f enderRight k ic k panel
C
4
D
A4
E
A5 GRAY
GRAY 1
3
1IO17
STP
G±W G±W
From Stop Light SW
< 5±6> < 4±6>B
2
1
34
1
2
3
45 6
WhereEverybodyKnowsYourName

OVERALL ELECTRICAL WIRING DIAGRAM
1234
11 LEXUS SC300
4ACC
IG1
ST1
AM1 2
1J
51C 6
1I
82
1J
7
1B
51C 1
1H
10
1B
4 1K
13 2
18 BT1 6Ba1
12 BT1 BT1 13 BT1 13 I F2 IF1 IF1 I F1
7B
GN D2
10 AUNSW
5AE1
4A ASW
16 A MSW
17 B
VC
11 A MRY
12 A M2
3A M1
8A ECUE
9A SO
1A SI
2A +
1B
IG 6B
P 18 A
BATT
IF IH 6BU1 47
68
3214
11
19 13 12 1B
2
1H
15
1C
8
1K
7
4B +B 2B
TEM+ 11 B
TEM±
10 B TIM+
6ATES
3B TIM±
7A TI S
M
M
10 1 5 6 3 4 1
WB
BR±B
B±R
R
L±W L±W R
GR
B±R
L±W L±Y L±B
R 6
5
BR 5W± L
W±L W
W
GR GR GR B±R
RR R
L±W
L±W
W
R± B
W± B
Y
B
W
BR±B
BR±B
R±WR±Y
R P
V±Y
V± W
B
W
BR±B
BR±B
P
R
R±Y
BR
P± L
R±L
R±B
Y±R
R±W
BR
L±Y
L±B
BR
W±B
60A MAIN
120A ALT 100A AM1F9
FUSE BLOCK 40A
IGSW
B±Y
GR B±R
BR±B
BR15A
ECU± I G 10A
DOME
Fr om A/ T Indicat or SW
< 3±6>
TI L T AND POWER TELESCOPI C ECU30A
POWER
30A
DOOR
TEL ESCO
LONG TILT
UP
TEL ESCO
SHORT TILT
DOWN
MANUAL SW AUTO SW
T I LT POSI TI ON
SENSOR
TI L T CONTROL MOTOR
TELESCOPIC POSITION
SENSOR
TE LE SCOP I C CONT ROL MOTOR No . 1
No . 2
SET
D1 2
DRIVING POSITION
MEMORY AND RETURN
SW
(
SHI ELDED )(
SHI ELEDED)
BATTERY
BR±B
T7
TELESCOPIC
POSI TI ON SENSOR
Power
Source Power Tilt and Power Telescopic
I15
IGNITION SW
6 74
To Unlock Warning SW
[IGNITION SW]< 4±4> < 5±4>
To Door Lock Mot or,
Door Unloc k Detec tion SW and
Door Open Detec tion SW LH< 17±4>
From Remote Cont rol Mirr or ECU
< 10±4> W
T10 A , T11 B
C17
TI LT AND POWER TELESCOPIC UNIT
[COMB. SW]
(
Cont . ne xt pa ge )
5
4
3
2
1
6789101112
12 34 56 78
9 10 1112 13 14 1516 1718
AA
T11 T10
TIL T AND POWER
TELESCOPI C ECU
W±L
Left kick panel Under t he ashtray LH2
1
3
4 1
2
To Parking Brake SW
< 21±2>
GR
( M/T )
(
A/T )
WhereEverybodyKnowsYourName

567 8
11 LEXUS SC300(
Cont ' d )
2 1
M
2
1M
2
1M
M BK
Ba 1 Ba1 Ba1
8Ba1 3Ba1
Ba 14Bb1BL
17 BX1 18 BX1
18 BX1
5Bb1 6Bb1 7Bb1
Ba1
7
1 21
42
3
23222 13651 1313
CDC
D
C C C C C C C DDDDDDDD
D DCD DDDC
M
21 M
12
D
C
C
2Ba1
346251
10 12 11
3
4
8
69
5
2
1
131
2
7
14
2
C
6 7 7152 9 4 111312145 10
193114122
16 6 14 3 10 5 15 8 17 1 8 18
B±R
R
L±W L±W R
GR
B±R
RL±W
R
L±W
VVV W±B W±B
BR±B
L±W
L±W
G±W
BR±B BR±B BR±B BR±B
BR± B
BR± BB
W Y±B BR BR BR
L±W
W± B BR BR
W±B W±B W±B
L
L±B V
LG
BR
BR
L±Y L±R
L±W
L±W
L±Y
L±R
V± R
W± B R
B
V± W
LG±R Y BR
BR
BR
B
R
L±W L±W
RB±R
B±R
L±W
V±B Y± R
Y±L
Y±G L±R
L±Y
L±B LL±W L±W
Y± L
Y± G L±RL±Y
L±B L
GR
G±W
LG
V
V
V Y±G
V± W
Y±R
Y±B
WB
W± B
W± B
BR±B
W± B
W
B
W± B
BR±B BR±B
BR±B
BR±B BR±B
G± W
B± R
SSRS PVCC SSSR RCL+ RCL± SSFV SSRV SI SO GND GND2 SGND
STOP I G SYSB P SLD+ SLD± FRV+ FRV± RRV+ RRV± +B2 +B
SL DFSLDR
FUPFDWN
RUPRDWN
RCLFRCLR
+B SYSB PRDC SLSW RRSW RFSW
SLDR SLDF GND SLD+ SLD± PVCC SSRS SGND 5 6 16 7 17 3 11 15 81 9 2 13 10
21
M
R
4912 13
G±R
G
P8
POWER SEAT CONTROL SW
(for Driver' s Seat )
From Stop Light SW
< 4±6> < 5±6>
POWER SEAT ECU (
Dr i ver ' s S sa t )
S20
SLI DE
POSITION
SENSOR LH P16
POWER
SEAT MOTOR
(
f or Driver' s
Seat Rclining
Contr ol ) F1 9
FRONT
VERTICAL
POSITI ON
SENSOR
R1 9
RE AR
VERT I CAL
POSI TI ON
SENSOR
P18
P OWE R S EA T MOT OR
(for Pass enger' s Seat
Reclining Control )
P9
POWER SEAT
CONTROL SW
(
for Pas senger ' S
Seat )
S21
SLIDE
POSI TION
SENSOR RH
P1 9
POWER SEAT MOTOR
(
for Passenger' s
Se at Sli d e
Co nt r o l )
T18
TENSION
REDUCER
SOLENOID LH
S1 9
SLIDE LIMIT SW
R2 0
RECLINING LIMIT SW
P12
POWER SEAT ECU (
Pas senger ' s Seat )
(
SHI ELDED )
Power Seat (
Driver' s ) Power Seat
(
Passenger' s )
and
Electric Tension Reducer
P15
POWER SEAT MOTOR
( for Driver' s Seat
Slide Control )
P13
POWER SEAT MOTOR
( for Driver' s Seat
Front Vertic al
Control )
P14
POWER SEAT MOTOR
( for Driver' s Seat
Rear Vertical
Control )
SL I DE F RONT SL I DE REARF. VER. UP
F . VE R. DOWN R. VER. UP
R. VER. DOWN RE C. F RONTRE C. RE AR
LUMBAR
SUPPORT FRONT
REAR
P14
POWER SEAT MOTOR
(
f or Driver' s Seat
Lumbar Suppor t
Cont rol )
D
LG±R
1 2BB±RT19
TE NS I ON REDUCER
SOLE NOI D RH
To Buc kl e
SW LH
<4±4><5±4>
D3
DIODE
(
f or Tens ion
Reducer )
B±L
L±W
RE AR
FRONT
VCC O/ P
GND
FRONT
RE AR
FRONT
RE AR
SLIDE RECLINING
B± R
P10 , P11 C
C 1 2
B±Y BRPBCL
12B5
BUCKLE SW RH2
134567
8 9 10 11 12 13 14 15 16
12 34 56 78
9 10 1112 13 14 1516 1718 D C
P10
P11
POWER SEAT ECU
(
Driver' s )
Under the center
pillar LH Under the center
pillar RH
2
1
WhereEverybodyKnowsYourName

1234
15 LEXUS SC300
4ACC
IG1
ST1
IG2
AM1
3
2
6
11 AM2
1J
7 1J
81J 51J 3
1B
4 1E
21E 17 1I9
1G
6 1G
10
3G
6 3A
5
7IG2 16 IJ26IJ2
16 IE1
4 9 14 13 1
6 42 3315 138453
2 4
7 8 3H
15
3A
1
12 IG1
1
2
IJ IF
4
1G
18
1E
13
1H 3
1G
1
IJ 1B
2
1G
11E 13
611
1211 10
11 10 12 9
1G
71G 9
3D
11
1E
31E 4
3A
3
3A
7
12
SPI RAL
CABLE
11
12
45 23 IK1
10 IK1 3B
2
3E
10
3E
33H 12
7
514
2
W
W± R
W±B
W±B
W±B
P±L
B±Y
B±O
L±R
L±R
L±R
B±R
B±R
L±R
B±O
W± R
W± R W± LB±O
B±Y
P±L
W± B P
LG±B
LG±R
W± B W± B R
W
GR B
YL
P± B
B±Y
B±Y
B±Y P±B
B±Y
P±B
B±Y P±B B± Y P± B
W± B W± B
V
P
LG±B
LG±R
G± W
V
W± B
W± B W
W±RW± L
W± L W± L W
W± R
40A
IGSW 15A
ECU± I G
15A
CI G
I15
IGNITION SW
100A AM1
120A ALT
30A AM2
30A INJ
SHI FT LOCK
SOLENOID
SHI FT LOCK
CONT ROL S W
F9
FUSE BLOCK S1 0
SHI FT LOCK ECU P2
PPS ECU
P1
PPS SOLENOI D
STP KLS+ E
E SPD SOL + SOL±
L±R
L G±RG
G±W
I15
KE Y I NTE RLOCK
SOLENOI D
[IGNITION SW]
Fr om Stop Light SW
<4±6><5±6>
From Combination
Meter< 21±5>
BATTERY E1 E2 +SL ±SL +SR ±SR D+ D± TC LA
+B
IG2
ACC
+B
IG
ACC
SLS+
SLS±
PT
P±
P2 7. 5A
IGN
15A
ECU± B
C12
AIRBAG
WARNING
LIGHT
[COMB. METER]
F1
FRONT AIRBAG
SENSOR LH F2
FRONT AI RBAG
SE NS OR RH
A29
AIRBAG SQUIB
T6
TDCL
(Total Diagnostic
Communicat ion Link )C3
CHECK CONNECTOR
TC AB TC AB
Power Source Shift Lock PPS SRS Airbag
C10
CENTER AIRBAG SENSOR ASSEMBLY
Right kick panel Left k ick panel
3
4
WhereEverybodyKnowsYourName

OVERALL ELECTRICAL WIRING DIAGRAM
1234
21 LEXUS SC300 (
Cont . ne xt pa ge )
4 ACC
IG1
ST 1
IG2
AM1
3
2
6
11 AM2
1J
7
1B
4 16 IE1
20 IK110 IK2
1IE1
1J
31J 51J821B 2
1E
1E
18
1E 1H1E 2 1E
131B
IG1 20 3D
3A 4
3D
2
3C
6
3A
2
3F
1 2 1 6
3F 5
3C
5
3A
IK16
IK1 7
10 IJ1
IE110
IG118
EB
19 IG1
ED EA 13 IE2 14 IG3 W± R
R
Y
B± O Y± B
V±R V± Y
R± W
L±R
W
R±Y B
V±W V
R
L±R
P± L
R
L±R L±R
P± L
P± L
Y
B±O B±YP±L
W± L
R± W
B
W± B R±W
B
W
W
W±L
W± L W±L
W
W±R
Y±B
V±R
V± Y
R±WV±Y V± R Y±B
W± R
W
W± R
B± O
R±W R± W
B
B
R±W R±W
R±W V±Y
BR
W± B
R±W Y
W±B Y
R4713
21 11
4
12
8
7
9
2
1
2
340A IGSW
100A AM1
120A ALT
60A MAIN
30A INJ
30A AM2
14
9 I15
IGNITION SW
7. 5A I GN
10A GAUGE
15A CIG
10A DOME
15A ECU±B
From ABS ECU
<9±2>
From ABS ECU
< 8±5>
(
* 1 )
(
* 2)
6
BATTERY
F9
FUSE BLOCK
12
O2
OI L P RE SS URE SW
C5
COOLANT LEUEL
WARNING SW E6
ENGI NE OI L L EVEL
WARNING SW
P3
PARKI NG
BRAKE SWD2
DIODE
(f or Par king
Brake )
B1
BRAKE FLUID
LEVEL SW
B
B
R±W R±WR±W
R±W
B
B B
( Canada )
(
Canada )
( US A )
(USA )
(
US A )
(
US A )
(
Canada )
(
Canada )(
Canada )
(
* 2
) (
* 1)
(
US A )(
US A)
(
USA )
R±W
R± W
Fro m Dayt i me
Running Light
Relay< 4±4>
Fr om Cr uise Control
ECU< 16±2> T1 5
TRIP SW AND THEFT DETERRENT
I NDI CA TOR L I GHT
S3
SPEED SENSOR No. 1
From Tr act ion ECU
<8±7>
2
W
12 12 2 54 11 13 *
1: (
w/ Tr action Contr ol )
* 2: (
w/oTractionControl )
Power
Source Combination Meter
R±WL±R
R
4 3
SECURITY
M
H
SET
RESET A/ B
W1
WASHER
LEVEL SW
P± L
L±R
R W± R
From ABS ECU
<8±5>
( * 1)
R
R
10 11 12 13 17 18 19 20 21 12345 6789
14 15 16 12 34 56 78
9 10 1112 13 14 1516 1718
17 18
1 2345 6789 10
23
22
21
20
19
15
14
13
12
11 16
AB C
C12 C13 C14 COMBINATION METER
1 1
23
DE
FUEL SENDER
F1 7 F1 8
Rear side of
c ylinder head LH Fr ont side of
right fender Fr ont s ide of
left f ender
2
1
2 2
1 1
1
B
S HORT CONNE CTOR
1
2 12F
S23
G
S22
7BU1
From Tilt and
Power Telesc opic
ECU< 11±2>
GR
B
( M/T ) 3
G±B
From Theft Det err ent and
Door Lock ECU< 17±2>
WhereEverybodyKnowsYourName

OVERALL ELECTRICAL WIRING DIAGRAM
1234
22 LEXUS SC300 (
Cont . ne xt pa ge )
4 ACC
IG1
ST 1
AM1 3
2
1J
7 21J
51K2
22 22
1B
4 2
1A
5
22 222 2 1
3
5 4
53
1
2
EB1 EB1 3IN1
2IN1
IN1
6
1IN1
12 IN1
EB I J 1 2
M
2 1 2
A 1
B
2
B
M
1A IJ1
2
5 4 216
4
6 12
4
74
3
W
B
P±L
B±Y
LW±G R W
P± L
R±L
L±W
G± Y
G±R R±L
R± W
BR±W G±W BR
R±Y V
W± G BR
G± Y
Y
B±R
BR±W G± W BR
R± Y V
W± B
L
BR
G±Y
RL±R
W± B
W± B W± B
W±B
W±B B
W± L W
W W
B
L
W
I15
IGNITION SW
40A IGSW
60A MAIN
120A ALT 100A AM1
F9
FUSE BLOCK
BATTERY
To Engine and
ECT ECU< 2±7>A/ C MAGNETI C
CL UTCH REL AY
10A HEATER 60A HEATER
To Radio and Player
< 19±3> < 20±2>
From Radio and Player
<19±3><20±1>
From Radio and Player
<19±3><20±1> To Radio and Player
< 19±3> < 20±2>
5 12
L±W
R±L
COOL
WARM
Power
Source Automatic Air Conditioner
R±L
R±LR±L
B
W±B W±B
B3
BLOWER
RESISTOR
(for Low
Speed )
A2
A/C LOCK SENSOR
AND A/C MAGNETIC
CLUTCH A17 , A18
A/C POWER TRANSISTOR
AB
A27
A I R MI X CONT ROL S ERV O MOTOR
HEATER
RELAY
B2
BLOWER
MOTOR Y
B±R A/ C POWER TRANSI ST OR
L±W
L±R
W
12
12
AB
A1 7 A1 8
A/C CONTROL ASSEMBLY
1 23 45 6
7 8 9 10 11 12 14 15
13 12 34
5 6 7 8 9 10 11 12 13 14 15 16 20 21 22 23 24 25 123456 7891011
17 18 19
EC D
A12 A13 A14
Front side of
lef t fender Ri gh t ki c k
panel
1
2
WhereEverybodyKnowsYourName