1991 LEXUS SC400 CD player

73
* 1 : W/ CD PLAYER
* 3 : FOR USA SPEC. *2:W/OCDPLAYER
8 13 715 2
3411912 8 3
E20 I32
I32
IJ 1 1 IK1
3
IK1
4
IK1
5IK1 2
EB1
2II1 5
B
4 E11
B
69 E1
B
28 VF2
B
29 VF1
A
20 TE1
A
3 KD
A
17 TT
A
23
ACMG A
34
A/C
IF
ED
BR
WGB
L±Y
B±R BR
B±R B±R
B±RLG
GR±Y
W
L±O
L±R W
GR±Y LG
GR±Y LG
B±Y BR
GR±Y LG
G±R
G±Y G±R
L
BR
L±Y B±R
B
G
W
BR
W
E1
+B
IG±
FP
OX
E1
OX2 TE1 VF1 ENG TE1 TT TE2 E11 , E1 2
T6
C3
FROM A/C MAGNETIC
CLUTCH RELAY
FROM A/C CONTROL
ASSEMBLY
ENGINE ECU (
M/T )
CHECK CONNE CTOR TDCL
(TOTAL DIAGNOSTIC
COMMUNICATION LINK )
A
B
IJ 1 12
R±L
I33
I32
BR
15 VF2
14
BR
BR
EC
E9 ,E10
ENGINE AND ECT ECU
(
A/T )
AB
IH1
2 IJ2
17
1 2IH1
1
A
19 TE 2
G±Y
W±B W±B L L
( SHIELDED )
(
SHIELDED )
B±R
BR B±R
(
SHIELDED )
KICK DOWN
SW
K3
BR
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238
GROUND POINT
RADIO AND PLAYER
WOOFER SPEAKER
AMP LIFIER
STEREO POWER
AMP LIFIER
CHOKE COIL
HIGH MOUNT STOP
LIGHT
HIGH MOUNT STOP
LIGHT
FUEL LID OPENER
SOLENOID
WIRELESS DOOR LOCK
ECU
POWER SEAT CONTROL
SW(
FOR PASSENGER' S
SEAT )
POWER SEAT ECU
( FOR PASSENGER' S
SEAT )
SEAT HEATER RH
( FOR PASSENGER' S
SEAT BACK )
PPS ECU
REMOTE CONTROL
MIRROR ECU I31
II
BV2
8
IQ2
12
B23 : PIONEER
B24 : NAKAMICHI
BR
BR
BR BR
(
W/O CD PLAYER )
( W/ CD PLAYER ) BR
BR
A/C POWER
TRANSISTOR
BLOWER RESISTOR
(
FOR LOW SPEED )
ABS ECU
ABS AND
TRACTION
ECU
TRACTION ECU (
GND )
DOOR LOCK CONTROL
SW
MIRROR HEATER RH DOOR LOCK MOTOR,
D OOR UNL OC K
DETECTION SW AND
DOOR OPEN DETECTION
SW RH DOOR KEY LOCK AND
UNLOCK SW RH
HEADLIGHT LO LH
I25
I14 B33
B6
B7
HEADLIGHT LO RH
B20
B21
B29
E1
I11 I12 I13
IJ
BL
Bd1
2
Bb14
IJ113
IP1 20
IN1
1
IE2
12
IE1
19
BX1
10
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B W±B W±B W±B W±B
W±B
W±B W±B W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B W±B
W±B
(
W/ REAR SPOILER )
( W/O REAR SPOILER )
W±BW±B
W±B W±B
(
GN D2 )
( GN D3 )
( GN D2 )
( GN D3 )
(
GN D1 )
W±B
W±B
BR
I27
W±B
W±B
WOOFER SPEAKER
AMP LIFIER
BU28
(W/O CD PLAYER )
P±L BR
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91
IQ1
4 I29 I29
3 2 2 15
11
32
111
10 1
2
3G
2 3H
53F 13H13H 63H2
3H
10 3C
33F 33E63H 93E5
IQ1
2
B
10 A
2
A
9
C
5
G
G
G
G
G
G±O
G±O
G±O
G±O
G±O
W±G
W±G
W±G
W±G
W±G
W±G
W±G
W±G
W±G
W±G G
G
W±G W±G
HA ZARD S W
RADIO AND PLAYER
A/C CONTROL
AND RADIO SW
TRACTION CUT SW
AND SEAT HEATER SW
CIGARETTE LIGHTER
A/T INDICATOR LIGHT
( FOR SHIFT LEVER )
TRI P S W AND THEFT DE TE RRE NT
INDICATOR LIGHT ECT PATTERN
SELECT SW (
W/ CD PLAYER )
( W/O CD PLAYER )
H7
R4 , R5 ,R 6
A1 5
T12
C11
A21
T1 5 E8AB C
REOS TAIL
IQ1
18
L
W±G
W±G
L
L
A1 3
A/C CONTROL
ASSEMBLY25 6
G
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567 8
4LEXUSSC300(
Cont ' d )
1
2
1
2 1D
11 E 1I
10
3G
1
1B
2
3A
9
1C
10
1E
20
1H
1
9BU1
1Bd15IG7
11 Bc 1
Be1 2 1
1
2
3A
10
1 2
3 84
921117
3G
83A 2
3A
1
2
12
1
1
4
1
2 1
2
EA BM BL 2Bd14
1
3
8
2 10
3H
3
3C
3
3F
2
3G
5
3H
1
3F 6
1
2
1
3
2
2
9
5
1
10
F 5
G
IQ1
2
6
7 IQ1
4
12
3A 9
3E 6
3E 6
3E
6
3H 2
3H 1
3H 1
2
10 11 1 2
GW±G
G
G
GW±G W± GW±G
GW±G
G±O
G±O
G±O
G±O
G±O W±G W± G W± G
W± G W± G
W± G
G± W
W± BY Y
G±O
G
G
W± L
G
G
G
GW±BW± B W± B W± B
G
Y
V± G
V± G Y
G±W
G± W
W±B
GGGG
G
W
G± W
G± W
B
W± B R± W
B
G±W G±W G±O
G±O
W± B W
W±GBR
Y± V L±B L
W±B
W± B
W± B
W±B
W±B
G
G
W± G W± G
W±B
±PK ±STP E HS +STP
ETCRLRVREILL±
7
G± O
G± O
+PK BWRN
T
15A
STOP
F3
LH
F4
RH
FRONT
CLEARANCE LI GHT
L3
LI GHT FAILURE SENSOR
RE AR LI GHT WARNI NG
LI GHT[ COMB. MET ER]
S12
STOP LIGHT SW
To ABS ECU<8±3><9±4>
To Shif t Lock ECU< 15±2>
G2
GLOVE BOX
LI GHT SW
F5
LH
F6
RH
FRONT SIDE
MARKER LIGHT
L2
LI CE NCE
PLATE LIGHT
W± B W±B
W±BH9
HIGH MOUNT
STOP LIGHT
H8
HIGH MOUNT
STOP LIGHT A1
A/C CONTROL
ASSEMBLY
A15
A / C C ON TR OL SW
AND RADIO SW
RADIO AND PLAYER
( w/o CD Player )
R4
RADIO AND PLAYER
( w/ CD Player )
T1 2
TRACTION CUT SW AND
SEAT HEATER SW
C1 1
CIGARETTE LIGHTER
A21
A/T INDICATOR LIGHT E8
ECT PATTERN
SELECT SW
T1 5
TRIP SW AND THEFT DETERRENT
INDICATOR LI GHT
R9
RHEOSTAT
G1
GLOVE BOX
55
13 13W±B
W±B
W± B W± B W± B
R± W
G±R
R± W G±R G±RTAI L AND
STOP LIGHT
[REAR COMB.
LIGHT]
R1 0
LH
R1 1
RH
TAIL
ST OP
TAIL
ST OP
To Engine and ECT ECU< 2±3>
To Traction ECU< 8±8>
To Cr uise Control ECU< 16±4>
To Cruise c ont rol
ECU< 16±4>
To Po wer Se at E CU
(Driver' s )
< 11±5>
G± W
G±W
(
* 1 )
(
* 2 )
( * 2 )
(
* 1
)
C13 , C14
ED
H
H
H
H
I3C
1
17
2345
COMBINATI ON METER C12 , C14 IH R5 , R6
FG
12 34
5678910
12
3456
RADIO AND PLAYER
(
w/ o CD Pl ay er )
Taillight and Stop Light (
for USA )
Illumination(
for USA )
*2:
(
w/o Rear Spoiler )
*
1: (
w/ Rear Spoiler )
W
G±W
G± O
Fro nt s i de of
right fender Under t he
c ent er pillar RH
Back panel c ent er 23
G
W± G
H7
HA ZA RD SW
10 11 12 13 17 18 19 20 21
12345 6789
14 15 16
17 18
1 2345 6789 10
23
22
21
20
19
15
14
13
12
11 16 C1 2 I
C1 4 H
COMBI NATI ON METER
RE AR LI GHT WARNI NG
LI GHT[ COMB. MET ER]
WhereEverybodyKnowsYourName

567 8
5LEXUSSC300(
Cont ' d )
1
2
1
2 1D
11 E 1I
10
3G
1
1B
2
3A
9
1C
10
1E
20
1H
1
9BU1
1Bd15IG7
11 Bc 1
Bc1 2 1
1 2
3A
10
1 2
3 84
921117
3G
83A 2
3A
1
2
12
1
1
4
1
2 1
2
EA BM BL 2Bd14
1
3
8
2 3
3C
3
3F
5
3H
1
3F 1
2
1
3
2
9
5
1
10
F 5
G
6
7
12
3A 9
3E 6
3E 6
3E
6
3H 2
3H 1
3H 1
2
10 11 1 2
G
GW±G
W± G
GW±G
G±O
G±O
G±O
G±O
G±O W± G W± G W± G
W± G W± G
W± G
G± W
W± BY Y
G±O
G
G
W± L
G
G
G
GW±BW± B W± B W± B
G
Y
V± G
V± G Y
G±W
G± W
W± B
GGG
G
W
G± W
G± W
B
W± B R± W
B
G±W G± W G±O
G±O
W
±B W
W± GBR
Y±V L±B L
W± B
W± B
W± B
W± B
W± B
G
W± G
W± B
±PK ±STP E HS +STP
ETCRLRVREILL±
7
G± O
G± O
+PK BWRN
T
15A
STOP
F3
LH
F4
RH
FRONT
CLEARANCE LI GHT
L3
LI GHT FAI LURE SENSOR
RE AR LI GHT WARNI NG
LI GHT[ COMB. MET ER]
S12
STOP L I GHT SW
To ABS ECU<8±3><9±4>
To Shi f t Lock ECU< 15±2>
G2
GLOVE BOX
LI GHT SW
F5
LH
F6
RH
FRONT SI DE
MARKER L I GHT
L2
LI CE NCE
PLATE LI GHT
W± BW± B
W± BH9
HI GH MOUNT
STOP L I GHT
H8
HI GH MOUNT
STOP L I GHT A15
A / C C ON TR OL SW
AND RADI O SW
RADI O AND PLAYER
( w/ o CD Pl ayer )
R2
RADI O AND PLAYER
( w/ CD Pl ayer )
T1 2
TRACTI ON CUT SW AND
SEAT HEATER SW
C1 1
CI GARETTE LI GHTER
A21
A/ T I NDI CATOR LI GHT E8
ECT PATTERN
SELECT SW
T1 5
TRI P SW AND THEFT DETERRENT
I NDI CATOR LI GHT
R9
RHEOSTAT
G1
GLOVE BOX
55
13 13W± B
W± B
W± B W± B W± B
R± W
G± R
R± W G± R G±RTAI L AND
STOP LI GHT
[ REAR COMB.
LI GHT]
R1 0
LH
R1 1
RH
TAI L
ST OP
TAI L
ST OP
To Engi ne and ECT ECU< 2±3>
To Tr act i on ECU< 8±8>
To Cr ui se Cont r ol ECU< 16±4>
To Cr ui se c ont r ol
ECU< 16±4>
To Po wer Se at E CU
(Dr i ver ' s )
< 11±5>
G± W
G± W
(
* 2
)
( * 2
)
(
* 1
)
C13 , C14
ED
H
H
H
H
I3C
1
17
2345
COMBI NATI ON METER C12 , C14 IH R5 , R6
FG
12 34
5678910
12
3456
RADI O AND PLAYER
(
w/ o CD Pl ay er )
Taillight and Stop Light (
for Canada )
Illumination(
for Canada )
*2:
(
w/ o Rear Spoi l er )
*
1:
(
w/ Rear Spoi l er )
W 10 11 12 13 17 18 19 20 2112345 6789
14 15 16
17 18
1 2345 6789 10
23
22
21
20
19
15
14
13
12
11 16 C1 2 I
C1 4 H
COMBI NATI ON METER
G±W
W± L
G± O (
* 1
)
Fr o nt s i de of
r i ght f ender Fr o nt s i de o f
l ef t f ender Bac k panel cent er
RE AR LI GHT WARNI NG
LI GHT[ COMB. MET ER]
10
3H
2
3G 62
IQ1 2
IQ14
GW±G GW±G
G
W ±G
A1
A/ C CONTROL
ASSEMBLY
23G
W± GH7
HAZARD SW
R5 F G
R6
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OVERALL ELECTRICAL WIRING DIAGRAM
1234
18 LEXUS SC300
1J
7 2
3 1J
5
1B
4 2
4 1C
6
4
ACC
IG1
ST1
AM1 2
4
7 9A 10A
8BS1
10 19 22 25 23 18 12 11 24 6 1 394 105
416 5
612
4B 5A 12A 5B 12B 8A 8B 1B 6B 2B 7B 2A 7A
6 20 Bc1 4 Bc2 3 Bc2 19 Bc1 16 Bc1 5 Bc1 17 Bc1 6 Bc1 15 Bc1 7 Bc2 4 Bc1 8 Bc2
10 IP1 1 I P15BT1 6BT1 11 A
6A
1A
11 B
19 BT1
20 BT1
18 Bc1 4 BS1 81514317
EB
16543 8 7 2
52
3A
W± L W± L W
B±Y
B±R W
W
W± L
R
Y± B
B
Y
O R
BR
GR±W
G
R± W G
W
B
B
W±B
W± B W
BR
W
L±R W
W
L±R R±L
R±L L±O
L±Y
L±B
B±Y B±R L
LG
L
LG V
V
LG L
LG
L
B±R B± YL±B
L±Y
L±O L
R±B BR
G± W
R±W
L±W
B±W
LG
L
15A
ECU± I G
15A
TEL
40A
IGSW
G±B
R
60A MAIN 100A AM1
120A ALT
BATTERY
F9
FUSE BLOCK
From Radio and Player
(
w/ CD Player )
< 19±1>
Fr om Stereo Power
Amplifier
( w/o CD Player )
< 20±1>
To Radio and Player
< 19±1> < 20±3>
F12
FRONT DOOR
SPEAKER RH MIC+ GND
M1
MOBILE PHONE
TEL EP HONE TRA NS CE I VE R
C1 6
TELEPHONE
MICROPHONE
[COMB. SW]
TELEPHONE TRANSCEI VER AND SPEAKER RELAY
SPEAKER RELAY B
Power
Source Cellular Mobile Telephone
(
SHI ELDED )
(
SHIELDED )
(SHI ELDED )
(
SHIELDED )
(SHI ELDED )
(
SHIELDED )W
I15
IGNITION SW
T16 A , T17 B 2
3
5
7
8
9
10
12 4
11 1
6 5
4
3
2
1
6789101112
AB
TELEPHONE TRANSCEIVER AND SPEAKER RELAY
T16 T17
12 Fr ont s ide of
left fender
10
9
BR BR BR
BR±W BR±W BR±W
BR BR
BR±W
WhereEverybodyKnowsYourName

1234
19 LEXUS SC300
4ACC
IG1
ST1
AM1 3
2
3BV1
2 BV2 1 BV2 6 IQ2 7 I Q2 4 BV2 3 BV2 10 BV2 9 BV2 6 BV1 5 BV1 4 BV1
10 I F2 1 IF22IG2 1IG2 11Bc2 12Bc2
10 BV1
11 IQ2 3 IQ1
7 BV2 2 BV1 19 BV1 7 BV1 18 BV1
3IG2
1Bc2
10 Bc 1
9Bc1
8Bc1
23 Bc1
8 BV2
12 IQ2 24 Bc 1
II BM 1J
5
1J
8
2
1C
6
1E
10
2
1B
4 1J
7
AMP E
MU TE A MP RU ± RU +
7A
10 C
4C
8A
3A
4A
3D
1D
6D
2D
3C
1A
6 5A 2A 6A 1B 3B 2B 6B 1C 5C 9C 2C
74
MU TE
AMP
RU±
RU+
RL±
RL +
RR±
RR+
FL±
FL+
FR±
FR+ TLMT PWR VOL+ VOLC SGND B ACC ANT ANTA ANTB WP+ WP± ACC +B E ANTB ANTA ANT ACC B IG
6
3
8
5
2
1
7
3
4
9
10
26 5 1 47
B
W
P±L
R± B BR
R± B P±L
W B Y B
W R
V
V
V
R
W B
Y
B
W
P±L
BR
BR P± L
W± B Y± R
L±W
P±G GR
L±Y
B±R
R±W
B±W
GR
L±Y
BR
L±Y
GR L±Y
GR
P± G
L±W Y±R L±Y
G±RL±YGR
P± G
L±W Y±R
Y±R
L±WP±G GR
L±Y L±Y W
P±L
VV
G±RR±L
R± W G± Y W
W± L W
LG L
P
P
P
P
V LG
L W
BR
BR
B±Y
P±L
B±Y
E
1 11 2
2 22 1
60A MAIN
100A AM1
120A ALT
40A
IGSW I15
IGNITION SW
BATTERY 20A
RADIO No. 1
7. 5A
RA DI O No. 2
RADIO AND PLAYER
F9
FUSE BLOCK A3 2
AUTO ANTENNA MOT OR AND REL AY
W1 0
WOOF ER SPEAKER
AMPLIFIER
W9
WOOFER
SPEAKER
R12
REAR
SPEAKER LH
R13
REAR
SPEAKER RH
F1 0
FRONT DOOR
SPEAKER LH
15A
ECU±I G
To Telephone Tr ans ceiv er
and Speaker Relay
< 18±7>
To A/ C Cont rol Sw
and Radio Sw
< 22±4>
To A/ C Cont rol Sw
and Radio Sw
< 22±4>
To Telephone Transc eiver
and Speak er Relay
< 18±7>
Power
Source
Radio and Player
(
w/ o CD Player )
Auto Antenna
2IE1L±Y
( SHI ELDED )
P± L (
SHI EL DED )
R2 ,R3 ,R5 , R6
CDA B 12
5
34
678910 12
3456
12 34
5678910 12
3456
CD A B
R2 R3 R5 R6 RADIO AND PLAYER
L±Y
GR
3
4
Under the
as htr ay RHBack panel
center
8
7
BR
Y B
WhereEverybodyKnowsYourName

OVERALL ELECTRICAL WIRING DIAGRAM
1234
20 LEXUS SC300 (
Cont . ne xt pa ge )
4 ACC
IG1
ST1
AM1 3
2
1J
7
1B
4
5
BV3 4
BV3 15
BV3 14
BV3 13
BV3 12
BV3 1
BV3 8
BV3 11
BV3 10
BV3 3
BV3 2
BV3 16
BV3 10
BV1 11
IQ2 2
IE1
3
IG2 2
2
74 3F 8F 9F 10F 1F 6F 11F 2F 7F 4F 5F 12F 3E 2C 6C 1C 3C 4D
6 1G 3G 2G 6G 1H 5H 8H 2H 6H 9H 4H 3H
3
IQ1 7
BV2
2
BV1 1
BV1 19
BV1 7
BV1 18
BV1
1J
8
1E
10
7D 6D 15D 14D 5D 13D 12D 11D 1E 5E 1D 2E 8D 4E 10E
3D
13
BV1
12
BV1
16
BV1
15
BV1
11
BV1
14
BV1
8
BV1
17
BV1
6
BV1
5
BV1
4
BV1
9
BV1
3
BV1
7H
B± Y
GR
L±Y
L±W B±RL±G
Y±R
R±B L±B
P± L W
BR B
G Y
W
BR L
R
L±YW
P±L
B± Y
W
W± L
W
G±WG± OY±R Y± L
B
W
BR
L
R
Y±B
V±W G±B
V
L±Y L±Y W
P±L
L±Y
L±Y
GR
L±Y
L±Y
P± G
L±W
Y±R GR
GR
L±Y
L±W B± R
L±G
Y± R
G±Y
R±W R± L
G± R V
G± B
V±W Y± B R
L
BR W
B
Y± L
Y±R
G± O
G±W
R L
BR
WY
G
BR±B BR
B
W
P±L
R± B
P±L
W
B
BR G
Y
W
BR
L
R
L±B R± B
GR
To Luggage Compar tment
light SW< 6±3>
From Telephon Tr ans ceiv er
and Speaker Relay< 18±1>
To A/C Control SW and Radio SW
< 22±4>
From A/C Control SW and Radio SW
< 22±4>
40A
IGSW I15
IGNITION SW
R± W
TXM+ TXM± TXS+ TXS± CDR+ CDR± SGND CDL+ CDL± GND +B ACC SW
TXM+ TXM± TXS+ TXS± CDR+ CDR± SGND CDL+ CDL± GND +B
BATTERY
60A MAIN 100A AM1
120A ALTF9
FUSE BLOCK F¥
RF¥ LR¥RR¥ L MUTE B E EP GND S GND RU+ RU± A MP MUTE
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CD A UTOMAT I C CHA NGE R
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w/ CD Player )
(
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(
SHIELDED )
( SHIELDED )(
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( SHI EL DED )
( SHI EL DED )
(
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( PIONEER )
7 8
(
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C9 R2 , R3 , R4
F DCE
12
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12 34
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GH
CD AUTOMATIC CHANGER
C2 0 C2 1
C20 , C21 GH
123 45
6789101112 F
CD PLAYER
C9 123 45
6 7 8 9 10 11 12
12
3456D
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RADIO AND PLAYER
R2
R4 R3 C(
PI ONEER )
3
4
1234 567
8 9 10 11 12 13 14 15
BR BR
BR
BR
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