Lexus SC300 / Lexus SC400. Manual — part 988
199
6. TILT UP REMINDER SYSTEM
WITH THE IGNITION SW IS TURNED TO ACC OR OFF WITH THE MOON ROOF STILL TILTED UP, KEY OFF MOON ROOF OPERATION
CAUSES CURRENT TO FLOW TO TERMINAL 6 OF THE MOON ROOF CONTROL RELAY FOR A PERIOD OF APPROX. 60 SECONDS OR
UNTIL THE DRIVER’S DOOR OR PASSENGER’S DOOR IS OPENED. WHEN KEY OFF MOON ROOF OPERATION ENDS AND THE
CURRENT FLOW IS STOPPED, THE MOON ROOF CONTROL RELAY RECEIVES A SIGNAL THAT THE IGNITION SW IS OFF. MOON
ROOF LIMIT SW NO. 1 AND NO. 2 ARE OFF AT THIS TIME, SO THE SIGNAL IS INPUT TO TERMINALS 8 AND 9 OF THE MOON ROOF
CONTROL RELAY, INDICATING THAT THE MOON ROOF IS IN THE TILT UP CONDITION. THIS CURRENT TO THE MOON ROOF
CONTROL RELAY FLOWS TO TERMINAL 12 OF RELAY
→
BUZZER
→
TERMINAL 11
→
GROUND, CAUSING THE BUZZER TO SOUND
FOR APPROX. 8 SECONDS. TO INFORM THE DRIVER THAT THE MOON ROOF IS IN THE TILT UP POSITION.
POWER MAIN RELAY
3–5 : CLOSED WITH IGNITION SW AT ON POSITION
M 2
MOON ROOF CONTROL RELAY
11–GROUND : ALWAYS CONTINUITY
6–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
4–GROUND : APPROX. 12 VOLTS WITH IGNITION SW ON, AND MOON ROOF CONTROL SW AT CLOSE OR UP POSITION
(EXCEPT APPROX. 200MM (7.9 IN) BEFORE FULLY CLOSED POSITION)
5–GROUND : APPROX. 12 VOLTS WITH IGNITION SW ON, AND MOON ROOF CONTROL SW AT OPEN OR DOWN POSITION
M 3
MOON ROOF CONTROL SW
1–4 : CLOSED WITH MOON ROOF CONTROL SW AT UP POSITION
2–4 : CLOSED WITH MOON ROOF CONTROL SW AT CLOSE POSITION
3–4 : CLOSED WITH MOON ROOF CONTROL SW AT DOWN POSITION
5–4 : CLOSED WITH MOON ROOF CONTROL SW AT OPEN POSITION
4–GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
D10
M 3
T 8
B
D11
M 4
A
T 9
A
M 2
M 4
B
: RELAY BLOCKS
CODE
SEE PAGE
RELAY BLOCKS (RELAY BLOCK LOCATION)
2
ENGINE COMPARTMENT LEFT
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE
SEE PAGE
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B
ENGINE ROOM MAIN WIRE
1D
FRONT DOOR LH WIRE
1F
ROOF WIRE
1H
1I
COWL WIRE
1J
COWL WIRE
1K
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE
SEE PAGE
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IP1
FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
BZ1
ROOF WIRE AND MOON ROOF WIRE (FRONT SIDE OF ROOF LEFT)
: GROUND POINTS
CODE
SEE PAGE
GROUND POINTS LOCATION
IF
LEFT KICK PANEL
IJ
RIGHT KICK PANEL
: SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
B 1
ROOF WIRE
B 3
MOON ROOF WIRE
SERVICE HINTS
200
MOON ROOF
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
1
LEXU
S
SC
30
0
(C
ont
.
ne
xt
pa
ge
)
2
1
5
3
1J
7
1J
31
J
5
3D
1
1B
4
1E
81
H
52
2
3D
2
16
IE
1
1E
B
2
1
5
IE
1
3E
B
1
2
5I
J2
1
3I
J2
2
E
B
2
1A
B
B
B
B
L
IG
S
1J
6
1K
4
1
C
1
D
4
AC
C
IG
1
ST
1
IG
2
AM
1
2
1
6
11
A
M
2
15
14
2
2
2
1I
G
3
W
W–
R
B–
Y
B–
W
B–
O
Y–
G
B–
Y
W
B
W –L
W
W–
R
W–R
B
W
B–Y
W
B
B
B
B–W
L–O
B
B–O
B
B–W
Y–G
Y–G
Y–G
B–Y
W
B
B
L–O
Y–G
B
W–R
4
7
9
14
13
5
6
120A
ALT
100A
AM
1
30A
IN
J
30A
AM
2
60A
MA
IN
F9
F
U
SE
BL
O
C
K
40A
IG
SW
I1
5
IG
N
ITIO
N
S
W
C1
2
CH
A
R
G
E
W
A
RN
ING
LI
G
H
T
7.
5
A
EN
G
IN
E
7.
5
A
AL
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SE
N
C
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G
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o
In
tegr
at
io
n
R
e
la
y
<
5
–4>
ST
AR
T
ER
RE
L
A
Y
7.
5
A
ST
N1
NE
UT
RA
L
ST
AR
T
S
W
To
The
ft
Det
err
ent
and
Door
Lock
EC
U
<18
–3>
To
Engin
ean
d
EC T
EC U
<2
–2>
ST
A
R
T
ER
AL
T
ER
N
A
T
O
R
BA
T
T
E
R
Y
2
3
1
C
har
gi
ng
S
tar
ting
B–
O
Y–G
3
4
S6
D
,
S
7
C
(C
anada
)
12
11
6I
J1
A1
0
B
,
A
1
1
A
1
23
1
BA
A1
0
A
1
1
BL
AC
K
AL
T
ER
N
AT
O
R
1
1
D
C
ST
A
R
T
ER
S6
S7
B
R
O
W
N
P
o
w
e
r
S
our
ce
Y–G
2
1
IJ
2
8
B
B
B–W
B–W
(A/
T)
(A/T
)
(M/
T)
(M/
T)
B
C 23
C LU
TC
H
STA
RT
SW
B
2
3
P
N
B–O
B–
O
5
6
7
8
1 LEXUS SC300(Cont’ d)
2 EC2
1 EC2
7 IJ1
1
3
4
5
1
2
B–O
B
B
B–O
2
1
B–
O
B–
O
B
L
B–
O
W–
L
B–
O
W–Y
Y–
G
W–Y
Y–G
To Engine and ECT ECU ” IGT1” <2–8>
To Engine and ECT ECU ” IGF1” <2–8>
To Check Connector ” IG–” <2–4>
IGF
IGT
+B
C–
TAC
I 2
IGNITER
NO. 1
I 4
IGNITION COIL
NO. 1
DISTRIBUTOR
N3
N
O
ISE
F
IL
T
E
R
( f
o
r
Ign
ition
S
y
st
e
m
)
Ignition
B–
O
8 IK1
To Comb. Meter ” TACHO” <21–7>
B–O
B
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