1991 LEXUS SC400 heater

57
87
65
43
21
10 9
12 11
14 13
21
22 21
20 19
18 17
16 15
2
2
2
2
2
2
2
2
2
2
2 2 22
2
2
2
2
2
22
2 2
2
IF 4
1B
1
4
4 2
2
4
4
EB1
3
W
B
B
B
B±R R±L
B
B
L±O R±Y L±R
WR
B±Y W
L±Y
W±L R
R
R
R±G R±B
R±W
B
R±Y
B
B
B±R
2
B
W±B B
R
1
212
1 2
2
4
3
1
1
3 43
1
3
5
2
2
4 4
3
5
3
4
20A RADIO NO. 1
25A HAZ±HORN 30A EFI
10A DOME
15A TEL
7. 5A ALT SENCING 7. 5A TRAC
HEADLIGHT
RELAY STARTER
RELAY
60A HEATER
50A DEFOGGER DEFOGGER
RE LA Y
15A SEAT±HTR
15A HEAD
(
LH±UPR )
15A HEAD (
RH±UPR )
15A HEAD (
LH )(
FOR USA )
15A HEAD (
LH±LWR )(
FOR CANADA )
15A HEAD (
RH )(
FOR USA )
15A HEAD (
RH±LWR )(
FOR CANADA )
DIMMER
RELAY
SEAT HEATER
RELAY 10A MIR±HTR
W±B I1W±B
B
(
M/T )
( A/T )
( CA NA DA )
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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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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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