LEXUS SC400 1991 Service Repair Manual

211
1E
10 1C 62
Bc1
23 Bc1 8Bc19
BV2
6BV2 5 IG2
3
IQ2
6IQ2 7
Bc2
11 Bc2 12 IF1
2
IQ2
11
IQ1
3
BV1
2
BV1
18 BV1 7 BV119
Bc1
24 Bc2 1Bc110B19
B19
I31I31
B
3B 4B8B 9 B
3
B
2B 6
B
10 B 4A8A 3A4
L±Y
L±Y
GR
W±B
GR
L±Y
P±L
L±Y
L±Y
L±Y
L±Y
L±Y GR GR
GR
W±B
GR
L±Y P±L
L±YGR
Y±R
L±W
P±G
B±R
Y±R
L±W
P±G
P±G
L±W Y±R
P
P
P
VV
R
W B
Y
Y B
V
1256 438
7
112 2
AMP B ACC E
ANTB ANTA ANT IG AUTO ANTENNA MOTOR
AND RELAY
A32 FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
15A
ECU±IG 20A
RADIO
NO. 1
7. 5A
RA DIO
NO. 2
GR
V
V
ANTB ANTA ANT ACC B
TLMT
RADIO AND PLAYER R2
,R3
,R4
ABC
FL+ FL± FR± FR+
RR+ RR± RL+ RL± STEREO POWER AMPLIFIER
S13
,S1 4
AB
REAR SPEAKER
RH REAR SPEAKER
LH
R13
R12 FR+
FR± MUTE SP±
SP+
TELEPHONE TRANSCEIVER
AND SPEAKER RELAY
T16 ,
T17
AB
L±Y
L±Y
B±R
7 8
IG2
1IG2 2
IF2
1IF2 10
V
P
21
FRONT DOOR
SPEAKER LH
F11
V
P
B
12
B
5
B
5B 1
Bc2
3Bc2 4
A5
B5
SHORT CONNECTOR
S22
,S2 3
A
B
A
12 A 5
LGL
( W/ TEL )
(
W/ TEL )
BV1
10
BT1
5BT1 6
IP1
10 IP1 1 Bc1
20
B
4
V
L
LG
FRONT DOOR
SPEAKER RH F12
A
12 B
12SHORT CONNECTOR
S22
,S23
AB
LGL LG
L
LG
LG
L
(W/O TEL )
L
LL
( W/ TEL )
( W/ TEL )
( W/O TEL )
(
W/O TEL )
L
LG
12
( W/ TEL )
( W/O TEL )
BV2
7
L±Y
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212
RADIO AND PLAYER (w/ CD PLAYER)
BV3
5BV3 4BV315 BV3 11 BV314 BV3 13 BV3 1BV38BV3 12 BV310 BV3 3BV32BV316 Bc1 25
I31 I31
I31
B16 B16
B25
D
3D 8D9D10 D 1D6D 11 D2D7D 4D5D12
A
1A 3A2A 6B1B 5B 8B2B6B 9B4B 3B7
C
2C 6C1C3
1
G±RR±L
R±W
G±Y
R±W G±W
G±O
Y±RY±L
B
W
BR
L
R
Y±B
V±W G±B
R±W
G±W
G±O
Y±RY±L
B
W
BR L
R
Y±B
V±W G±B
12 13 14 11
TXM+ TXM± TXS+ TXS± CDR+ CDR±
TXM+ TXM± TXS+ TXS± CDR+ CDR±
SGND CDL+ CDL±
SGND CDL+ CDL±GND +B ACC SW
GND +B ACC
PWR
VOL+
VOLC
SGND
PWR VOL+ VOLC SGND
A/C CONTROL SW
AND RADIO SW A1 5 LUGGAGE
COMPARTMENT
LIGHT SW
L6
CD AUTOMATIC CHANGER
C20 ,
C21
A
B
R2 , R3 ,
R 4
A B C RADIO AND PLAYER C9
DCD PLAYER
BR BR
BR±W
BR±W
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213
R 4(A) RADIO AND PLAYER
(A) 3±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
(A) 4±GROUND : ALWAYS APPROX. 12 VOLTS
S14(B) STEREO POWER AMPLIFIER
(B) 7±GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1528L 630S14B31
A3230R 2B29S22A29
C 9D28R 3C29S23B29
C20A30R 4A29T16A31
C21B30R1231T17B31
F1130R1331W 931
F1230S13A31W1031
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C20INSTRUMENT PANEL WIRE
1E20FLOOR WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IF136FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
IF236FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
IG236INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IP138FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
IQ138INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)IQ238INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
BT140FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
BV1
BV240FLOOR NO. 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
BV3
40FLOOR NO. 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
Bc140FLOOR NO 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)Bc240FLOOR NO. 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
II36UNDER THE ASHTRAY RH
BM40BACK PANEL CENTER
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I3038CONSOLE BOX WIREB23
I3138CONSOLE BOX WIREB2440FLOOR NO. 3 WIRE
B16B25
40FLOOR NO. 3 WIRE
B1940FLOOR NO. 3 WIREB3540FLOOR MAIN WIRE
B22B3740FLOOR NO. 3 WIRE
SERVICE HINTS
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214
RADIO AND PLAYER (w/o CD PLAYER)
II
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
BV2
8Bc1 10 Bc21Bc1 24 BV1 4BV15BV16BV13
Bc1
23 Bc1 8Bc19 BV1 19 BV17BV118 BV2
2BV2 1
B19
B19
B16 B1 9
I31
IC
6
BM C
9A 5A1A2
C
8A 4A10 C 1C5
C
7
Bc2
4Bc2 3
P±L P±L P±L P±L
GR
L±Y GR
L±Y
P±L
P±G
L±W Y±R BR
LGL
B±R
GR
L±Y
B±R
GR
GR
L±Y
P±L L±Y
Y±R
L±W P±G
P±G
L±W Y±R BR
LGL
LG
L
LG W±B
BR
W±B
P±LWB
R±B P±L
W B P±B
R±W
B±W GR
L±Y GR
WOOFER SPEAKER AMPLIFIER W10
W9
WOOFER
SPEAKER
RADIO A ND P LA YER ABCD
R2 ,R3
,R5
,R
6
AUTO ANTENNA MOTOR
AND RELAY A32
AB
T16 T17
TELEPHONE
TRANSCEIVER AND
SPEAKER RELAY
651210 9
7125 43
3
8
6 7
15A
ECU±IG
AMP RU± RU+ MUTE WP+ WP±ACC +B
P±L
21
4
IG ACC
MUTE
ANTB ANTA FR±
AMP
IQ2
12
BR
BR
(W/ TEL )
(
W/O TEL )L
(
W/ TEL )
E
(
W/O TEL )
AMP RU± RU+
ANT ANT ANTA ANTB E FR+
FR±
B
FR+
(
SHIELDED )
(
SHIELDED )
A
5A 12
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215
TLMT
B
FL+ FL± RL+ RL±
RADIO AND PLAYER
RR+ RR±
IF2
10 IF2 1
IQ 2
6IQ2 7
BT1
5
BU1
6
BV1
10
BV2
10 BV2 9BV24BV2 3
Bc2
12
Bc2
11
IG2
1
IG 2
2
Bc1
20 B
3B 1B6B 2
11 14 13 12
B
4B 12 B5
A
3 C
2C 6D2D 6D1D 3
VOLC VOL+ PWR
MUTE SP± SP+ L
V
L
L
LG
P
B
Y
R
W V PP
V
B
Y
R
W G±R
R±L
R±W G±Y
A/C CONTROL SW AND RADIO SW
TELEPHONE
TRANSCEIVER AND
SPEAKER RELAY RH LHFRONT DOOR SPEAKER LH RH
REAR SPEAKER
A1 5
T16 ,
F12 F11R12 R13
R2 ,
R3 ,
R5
,R6
ABCD
AB 11
22
V
IP 1
10
IP1
1
A
12
A
5
B5
B
12
LG
(
W/ TEL )
LG
LG
(
W/ TEL )
(
W/O TEL )
LG L
L
LG T16 ,
SHORT CONNECTOR
SHORT
CO NNECTOR
L
P
V
B
Y
R
W
C
4C 3
BV2
7BV1 2IQ13IQ2 11
I31 IE1
2
IG2
3
1E
10 2
L±Y
GR
GR
L±Y
L±Y
GR GR
L±Y
L±Y
GR
L±Y
L±Y
L±Y
7. 5A
RADIO
NO. 220A
RA DIO
NO. 1
FROM POWER SOURCE SYSTEM
(
SEEPAGE56 )
SGND
VOLC
VOL+ PWR
11 22
7 8
SGND
ACC
V
T16
,B
B
(
W/O TEL ) V
T1 7
A
T1 7
A
7
T1
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216
RADIO AND PLAYER (w/o CD PLAYER)
R 5(A) RADIO AND PLAYER
(A) 3±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
(A) 4±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 7±GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1528R 3B29T16A31
A3230R 5C29T17B31
F1130R 6D29W 931
F1230R1231W1031
R 2A29R1331
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C20FLOOR WIRE
1E20INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IE136ENGINE ROOM MAIN WIRE AND COWL WIRE (R/B NO. 4)
IF236FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
IG236INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IP138FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
IQ138INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)IQ238INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
BT140FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
BU140INSTRUMENT PANEL WIRE AND FLOOR WIRE (LEFT KICK PANEL)
BV140FLOOR NO 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)BV240FLOOR NO. 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
Bc140FLOOR NO 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)Bc240FLOOR NO. 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
II36UNDER THE ASHTRAY RH
BM40BACK PANEL CENTER
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I3138CONSOLE BOX WIREB1940FLOOR NO. 3 WIRE
B1640FLOOR NO. 3 WIRE
SERVICE HINTS
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192
REAR WINDOW DEFOGGER AND MIRROR HEATER
1B
11C 71D 11H 4
3A
1
1J
1
22
2
1A
5
3G
3
1D
10
22
1E18
IE1
13
IQ1
13
IP1
20
IG1
16 IP1
4
Bc2
10
BL IF IJ
E9
A
10
B
7 2
34
1
12
W±B
BB
B
R±L
R±Y
R±Y
R±Y
R±Y
W±B
W±B L±R B
B
L±R
L±R
B
W±B W±B
W±B
W±B
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
10A
HTR 50A
DEFOGGER 10A
MIR±HTR
DEFOGGER
RE LA Y
REA R
WINDOW
DEFOGGER CHOKE
COILMIRROR
HEATER LH
MIRROR
HEATER RH
RDFGR GND
IQ1
10
W±B
DEFOGGER SW
[A/C CONTROLASSEMBLY]
A12 , A 1 3
C22
R16 R17
B
A
43
2 1EB
B
4 A
7
B
4 A
7
A
8
B
5 A
8
B
5 (
W/ MEMORY )
( W/O MEMORY )
( W/ MEMORY )
( W/O MEMORY )
B
W±B
NOISE FILTERN2
A
1
B
1
BL
R14 , R15 A
B
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7XXX XX X
10 12 12
87 BA
N2
C22
A1 3
A12
A(
W/ MEMORY )
R16, R17
54B
R16, R17 (
W/O MEMORY ) 1
R
14 ,
R15
AB
193
DEFOGGER RELAY
2±4 : CLOSED WITH IGNITION SW AT ON POSITION AND DEFOGGER SW (A/C CONTROL ASSEMBLY) ON
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A12B28R14A31R17A31
A13A28R15B31R17B31
C2230R16A31
N 227R16B31
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A20ENGINE ROOM MAIN WIRE1B20ENGINE ROOM MAIN WIRE
1C20FLOOR WIRE
1D20FRONT DOOR LH WIRE
1E20INSTRUMENT PANEL WIRE
1H20COWL WIRE1J20COWL WIRE
3A22INSTRUMENT PANEL WIRE3G22INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IE136ENGINE ROOM MAIN WIRE AND COWL WIRE (R/B NO. 4)
IG136INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IP138FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
IQ138INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
Bc240FLOOR NO. 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB34FRONT SIDE OF LEFT FENDER
IF36LEFT KICK PANEL
IJ36RIGHT KICK PANEL
BL40UNDER THE CENTER PILLAR RH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 934ENGINE ROOM MAIN WIRE
SERVICE HINTS
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190
SEAT HEATER
1
32 1
32
1
32 1
32
4
3A
1 3H
14
1E
18
1J
1 IG2
10
BY13
BU1 2 Bb1
14
IF BK BL
Ba1
12
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
15A
SEAT±HTR
1
GLL G
B
B
W±B
G
Y
W Y
W W±B
W±B
W±B
W±B
W±B W±B
SEAT HEATER
(
FOR DRIVE R' S
SEAT CUSION )
SEAT HEATER
(FOR PASSENGER' S
SEAT BACK )
SEAT HEATER
(
FOR DREVER' S
SEAT BACK ) SEAT HEATER
(
FOR PASSENGER' S
SEAT CUSION )
S16
S15 S18
S17
2
LH
RH
B
5 A
7
B
1
A
8 B
B
A
A
310
43
Ba2
2 Ba1
14
(
M/T )
( A/T )
(
W/ MEMORY POWER SEAT )
( W/O MEMORY POWER SEAT )
SEAT HEATER SW S24
,T12
B A
Ba2
5 (
W/ MEMORY POWER SEAT )
( W/O MEMORY POWER SEAT )
Bb1
4
G
G
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191
T12 SEAT HEATER SW
7±GROUND : APPROX. 12 VOLTS WITH SW AT ON POSITION
8±GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
S1532S1732S24B29
S1632S1832T12A29
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
423LEFT KICK PANEL (J/B NO. 1 LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE
1J20COWL WIRE
3A22INSTRUMENT PANEL WIRE3H22INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IG236INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
BU140FLOOR WIRE AND INSTRUMENT PANEL WIRE (LEFT KICK PANEL)
BY140INSTRUMENT PANEL WIRE AND FLOOR NO. 3 WIRE (RIGHT KICK PANEL)
Ba142FLOOR WIRE AND FRONT SEAT LH WIRE (UNDER THE FRONT LH SEAT)Ba242FLOOR WIRE AND FRONT SEAT LH WIRE (UNDER THE FRONT LH SEAT)
Bb142FLOOR NO. 3 WIRE AND FRONT SEAT RH WIRE (UNDER THE FRONT RH SEAT)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
BK40UNDER THE CENTER PILLAR LH
BL40UNDER THE CENTER PILLAR RH
13 2
1
2
3 3X
10 X
78X
S15, S17 S16, S18
ORANGE
1X3 45XBA
S24 T12
SERVICE HINTS
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