1991 LEXUS SC400 light

90
ILLUMINATION
1B
2
1K
5 3G
83A 12
3A
2
3A
93G 13A10
1I
3
1K
11
1J
1 3A
1
OFF
TAIL
HEAD 2 1 1 2
1G1
5
IF 1E
18 RL RV RE TC
RL RE
826 RV
7 314
4
3
4
6
G±O
G±O
G±O
G±O
L±B
Y±V
BR L G±O
W±B
W±G
W±B
L
W±B
WW±L
G±L
LG ±B G±W G±W W±L
LG±BG±W
W±B G±O
(US A )
( CANADA )
(USA )
TAILLIGHT
RELAY
INTE GRATION
RE LAY
BATTERY FUSE
BLOCK COMBINATION
SW
120A ALT 100A AM1
INTEGRATION
RE LAY
7. 5A
PANEL
GLOVE BOX
LIGHT SW GLOVE BOX LIGHT
RHEOSTATCOMBINATION METER
(
CANADA )
LIGHT
CONTROL SW
C15
F9
G2 G1I16I16
C12
R9
W
23 15 3C
1
A
17
B
3B 4B5B 2
A
,C14 B
G±O
(
USA )
( CANADA )
B
11
A
4
B
5
B
10
B3 12
(CANADA )
A
A
TC E I LL ± T
W±B
W±G
L
I18
L
L
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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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92
ILLUMINATION
TAILLIGHT RELAY5±3 : CLOSED WITH LIGHT CONTROL SW AT TAIL OR HEAD POSITION
C15 LIGHT CONTROL SW [COMB. SW]
3±4 : CLOSED WITH LIGHT CONTROL SW AT TAIL OR HEAD POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1328E 828R 4A29
A1528F 926R 5B29
A2128G 128R 6C29
C1128G 228R 929
C12A28H 729T1229
C14B28I16A29T1529
C1528I16B29
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE
1E20INSTRUMENT PANEL WIRE
1I
1J20COWL WIRE
1K
20COWL WIRE
3A
3C
3E22INSTRUMENT PANEL WIRE3F22INSTRUMENT PANEL WIRE
3G
3H
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IG136INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO.5)
IQ138INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I1838INSTRUMENT PANEL WIREI2938CONSOLE BOX WIRE
SERVICE HINTS
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94
INTERIOR LIGHT
21I
61E 91D10 1J 11F61F 21K1
4
1B
51H 10 1D61E11 1F 81H9
4
B6 IP 1
15
IP1 20
IJ IF
2 1 R
R
R
R
R
R±W
BR±W W±B
R±W
W±B
W±B
R
R R R R R
G±L
R±W
W±B
W±B
W±B
BR±W R±W
R±W
R±W
R±W
W±B
W±B
W±B
10A
GAUGE 7. 5A
RA DIO
NO. 210A
DOME
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
DIODE
DOOR OPEN
DETECTION SW RH
INTEGRATION
RELAY FADE OUT
CONTROL CIRCUIT1
R±W
D11
1
11
2
10
4
6
7 2
1D
8
B4
6 3 B4
4
1
4
1 A
1
B
1
A
2
B
3
IP 1
6
IF2
16
R±W P±B
L±W
R±W P±B
L±W
W±B
W±B
W±B
B7
(
USA )
( CA NADA )
DOOR KEY LOCK AND
UNLOCK SW LH
DOOR KEY LOCK AND
UNLOCK SW RH
DOOR OPEN
DETECTION SW LH D8 D7
D106 3
R±W
R±W
I16
,
AB
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95
B2I15
B2
B1 3A
6
3D
4
2 1 2
1 2
12
12
1
2 1
2
1
3
ON
DOOR
BX1
4
IP 1
17
Bc1
25
1
R
R
R
R
R
R±W
BR±W W±B
R±W
R±W
R±W
R
R
R
R
R
R
R
R
R
R
R
R R
R
R±W
R±W R±W R±W W±B W±B
BR±W
R±W R±W
R±W
W±B
IGNITION KEY CYLINDER
LIGHT
STEP LIGHT
PERSONAL LIGHT
VANITY LIGHT RH
VANITY LIGHT LHOPEN DOOR WARNING
LIGHT [COMB. METER]
DOOR COURTESY LIGHT
LH RH
LUGGAGE COMPARTMENT
LIGHT
1
2 A
11
B
12
I14
S11
P20
V6
V5
D5 D6
C12 , C 1 4
L6 BA
L7
LUGGAGE COMPARTMENT
LIGHT SW INTERIOR
MAP
MAP
OFF
I6
I7 B1
R
W±B
W±B
(
W/O M00N R00F )
( W/ M00N R00F )
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96
INTERIOR LIGHT
INTEGRATION RELAY (J/B NO. 1)(1B) 5±GROUND : ALWAYS APPROX. 12 VOLTS
(1D) 8±GROUND : CONTINUITY WITH FRONT LH DOOR OPEN
(1I) 6±GROUND : CONTINUITY WITH FRONT RH DOOR OPEN
D10, D11 DOOR OPEN DETECTION SW LH, RH
3±6 : CLOSED WITH DOOR OPEN
L 6 LUGGAGE COMPARTMENT LIGHT SW
1±GROUND : CLOSED WITH LUGGAGE COMPARTMENT DOOR OPEN
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C12B28D1030L 730
C14A28D1130P2032
D 530I1430S1129
D 630I16A30V 531
D 730I16B30V 631
D 830L 630
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
422LEFT KICK PANEL (J/B NO.1 LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE
1D20FRONT DOOR LH WIRE
1E20INSTRUMENT PANEL WIRE
1F20ROOF WIRE
1H
1I20COWL WIRE1J20COWL WIRE
1K
3A23INSTRUMENT PANEL WIRE3D23INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IF236ENGINE WIRE AND COWL WIRE (R/B NO. 4)
IP138FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
BX140FLOOR NO. 3 WIRE AND COWL WIRE (RIGHT KICK PANEL)
Bc140FLOOR NO. 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
IJ36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 6B 240ROOF WIRE
I 738COWL WIREB 440FRONT DOOR LH WIRE
I15
38COWL WIRE
B 640FRONT DOOR RH WIREB 140ROOF WIREB 740FRONT DOOR RH WIRE
SERVICE HINTS
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108
LIGHT AUTO TURN OFF
1K
11
2 2
1D
8
IF
1J
1 1K
5
1B
2
2
1B
5
4
4
4 B
11
A
3A 6
B
12
1D10
6
4
2
47
3124
3
313
6
13
1
IE1
6 10A
GA UGE
10A
DOME
R±Y
W
W±B
R±W
W±B
W±B
R±GG±L W
W±LW
W±G
R±Y R±Y
W±L
R
G±W
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
BATTERY
FUSE BLOCK INTEGRATION
RE LAYTAILLIGHT
RELAY
HEADLIGHT
RELAY
FROM CORNERING
LIGHT RELAY
TO DIMMER SW
LIGHT
CONTROL SW
DOOR OPEN
DE TE CTION SW LH 120A ALT
100A AM1 60A MAIN
Q
Q S
R
R S
OFF
TAIL
HEAD
COMB INATION SW
F9
C15
D10
I16
DIODE 32 51
B
A
R±Y
7
A
4
B
10 B 13
A
5
R±Y
(CANA DA )
(
USA )
( USA )
( CANADA ) 2
I5 1
10 6
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109
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 7 OF THE INTEGRATION RELAY THROUGH GAUGE
FUSE. VOLTAGE IS APPLIED AT ALL TIMES TO TERMINAL (A)4 (USA), (B)11 (CANADA) OF THE INTEGRATION RELAY THROUGH THE
TAILLIGHT RELAY COIL, AND TO TERMINAL (A)5 (USA), (B)12 (CANADA) THROUGH THE HEADLIGHT RELAY COIL.
1. NORMAL LIGHTING OPERATION
TURN TAILLIGHT ON
WITH LIGHT CONTROL SW TURNED TO TAILLIGHT POSITION, A SIGNAL IS INPUT INTO TERMINAL (A)3 (USA), (B)10 (CANADA) OF
THE INTEGRATION RELAY. DUE TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A)4 (USA), (B)11 (CANADA) OF THE RELAY
FLOWS TO TERMINAL (A)3 (USA), (B)10 (CANADA) " TERMINAL 3 OF THE LIGHT CONTROL SW "TERMINAL 4 " TO GROUND AND
TAILLIGHT RELAY CAUSES TAILLIGHT TO TURN ON.
TURN HEADLIGHT ON
WITH LIGHT CONTROL SW TURNED TO HEADLIGHT POSITION, A SIGNAL IS INPUT INTO TERMINALS (A)3 (USA). (B)10 (CANADA)
AND (A)6 (USA), (B)13 (CANADA) OF THE INTEGRATION RELAY. DUE TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A)5
(USA), (B)12 (CANADA) OF THE RELAY FLOWS TO TERMINAL (A)6 (USA), (B)13 (CANADA) " TERMINAL 13 OF THE LIGHT CONTROL
SW " TERMINAL 4 " TO GROUND IN THE HEADLIGHT CIRCUIT, AND CAUSES TAILLIGHT AND HEADLIGHT RELAY TO TURN ON. THE
TAILLIGHT CIRCUIT IS SAME AS ABOVE.
2. LIGHT AUTO TURN OFF OPERATION
WITH LIGHTS ON AND IGNITION SW TURNED OFF (INPUT SIGNAL GOES TO TERMINAL 7 OF THE RELAY), WHEN DOOR ON DRIVER'S
SIDE IS OPENED (INPUT SIGNAL GOES TO TERMINAL 6 OF THE RELAY), THE RELAY OPERATES AND THE CURRENT IS CUT OFF
WHICH FLOWS FROM TERMINAL (A)4 (USA), (B)11 (CANADA) OF THE RELAY TO TERMINAL (A)3 (USA), (B)10 (CANADA) IN TAILLIGHT
CIRCUIT AND FROM TERMINAL (A)5 (USA), (B)12 (CANADA) TO TERMINAL (A)6 (USA), (B)13 (CANADA) IN HEADLIGHT CIRCUIT.
AS A RESULT, ALL LIGHTS ARE TURNED OFF AUTOMATICALLY.
HEADLIGHT RELAY 1±2 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
TAILLIGHT RELAY 5±3 : CLOSED WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
I16(A)(B) INTEGRATION RELAY
7±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
6±GROUND : CONTINUITY WITH DOOR LH OPEN
(A) 4, (B) 11±GROUND: ALWAYS APPROX. 12 VOLTS
(A) 5, (B) 12±GROUND: ALWAYS APPROX. 12 VOLTS
(A) 6, (B) 13±GROUND: CONTINUITY WITH LIGHT CONTROL SW AT HEAD POSITION
(A) 3, (B) 10±GROUND: CONTINUITY WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
D10 DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR OPEN DETECTION SW LH
3±6 : CLOSED WITH DOOR LH OPEN
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1528F 926I16B29 (CANADA)
D1030I16A29 (USA)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
423LEFT KICK PANEL (J/B NO.1 LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE
1D20FRONT DOOR LH WIRE
1J20COWL WIRE1K20COWL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IE136ENGINE WIRE AND COWL WIRE (R/B NO.4)
SYSTEM OUTLINE
SERVICE HINTS
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