Lexus SC300 / Lexus SC400. Manual — part 987
1
2
X
X
X
9
10
D 4
I15
BLACK
107
LIQUID CRYSTAL INNER REAR VIEW MIRROR
2
1F
8
1B
5
B 2
1
2
R
Y
R
R
R
W–
B
10A
DOME
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
INNER MIRROR
UNLOCK
WARNING SW
[IGNITION SW]
D 4
I15
TO FRONT PERSONAL
LIGHT
DAY/NIGHT
SHIFT SW
1F
9
1I
15
9
10
1H
13
1J
1
1F
Y
W–B
1
2
D 4
DAY/NIGHT SHIFT SW
1 – GROUND: ALWAYS APPROX. 12 VOLTS
I15
UNLOCK WARNING SW [IGNITION SW]
10–9: CLOSED WITH IGNITION KEY IN CYLINDER
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
D 4
I15
: 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
1F
ROOF WIRE
1H
1I
COWL WIRE
1J
: GROUND POINTS
CODE
SEE PAGE
GROUND POINTS LOCATION
IF
LEFT KICK PANEL
: SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
B 2
ROOF WIRE
SERVICE HINTS
196
MOON ROOF
1B
5
1I
16
1K
7
1K
13
2
1D
8
1F
8
1H
10
IP1
20
IP1
15
BZ1
4
BZ1
5
BZ1
1
IJ
IF
B 3
B 1
6
3
6
3
M
R
Y–R
W–B
W–B
W–B
W–B
W–B
L
R
L–W
B–
R
R
Y–
R
W–
B
R–
B
R–
W
R–
W
R–
W
W–
B
W–
B
B
BR
LG
W
W–
Y
W–
B
B
W–
B
W–B
B–Y
11
4
5
8
9
12
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
30A
DOOR
15A
ECU–IG
10A
DOME
T
H
EF
T
D
E
T
ER
R
E
N
T
A
N
D
DO
O
R
L
O
CK
C
O
NT
RO
L
E
CU
KEY OFF POWER
CIRCUIT
DO
O
R
O
P
E
N
DE
T
E
C
T
IO
N
S
W
L
H
DO
O
R
O
P
E
N
DE
T
E
C
T
IO
N
S
W
R
H
M
OON
R
OOF
M
OT
OR
A
N
D
L
IM
IT
S
W
NO
.
1
MOON ROOF CONTROL
RELAY
MOON ROOF
MOTOR
NO
.
2
T8
,
T9
M 2
D1
0
D1
1
M4
BA
A
8
A
2
A
20
B
8
A
16
A
13
A
12
W–
B
W–
B
W–
B
4
5
1
3
2
6
BUZZER
1
2
2
1
3
GND
MTR+
MTR–
IS1
IS2
L
W
Y
A
M 4
B
197
1D
10
1J
1
1F
6
1F
5
1I
7
BZ1
3
BZ1
8
BZ1
7
BZ1
2
BZ1
6
4
W–B
W–B
W–B
W–B
Y–R
Y–R
L–Y
L–B
L–R
L–W
V
P
V–
W
P–
L
W–
B
W–
B
W–
B
L
R
1
2
7
3
POWER MAIN
RELAY
MOON ROOF CONTROL
RELAY
OP
E
N
CL
O
S
E
DO
W
N
UP
MOON ROOF
CONTROL SW
30A
POWER
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
M 3
M 2
5
2
3
1
Q
R
S
TIMER
S
R
Q
TI
M
E
R
6
2
3
1
5
1
2
198
MOON ROOF
CURRENT IS APPLIED AT ALL TIMES THROUGH POWER FUSE TO TERMINAL 5 OF POWER MAIN RELAY AND ALSO THROUGH DOME
FUSE TO TERMINAL 12 OF MOON ROOF CONTROL RELAY. WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TERMINAL 1
OF POWER MAIN RELAY
→
TERMINAL 2
→
TO GROUND THROUGH ECU–IG FUSE. AS A RESULT, POWER MAIN RELAY IS ACTIVATED
AND THE CURRENT TO TERMINAL 5 OF POWER MAIN RELAY FLOWS FROM TERMINAL 3 OF RELAY TO TERMINAL 6 OF MOON ROOF
CONTROL RELAY.
1. SLIDE OPEN OPERATION
WHEN THE IGNITION SW IS TURNED ON AND THE MOON ROOF CONTROL SW IS PUSHED TO THE OPEN POSITION, A SIGNAL IS
INPUT FROM TERMINAL 5 OF MOON ROOF CONTROL SW TO TERMINAL 1 OF MOON ROOF CONTROL RELAY. MOON ROOF LIMIT SW
NO. 2 IS ON AT THIS TIME.
WHEN THIS OCCURS, THE RELAY IS ACTIVATED AND THE CURRENT TO TERMINAL 6 OF MOON ROOF CONTROL RELAY FLOWS
FROM TERMINAL 5
→
TERMINAL 3 OF MOON ROOF MOTOR
→
TERMINAL 1
→
TERMINAL 4 OF MOON ROOF CONTROL RELAY
→
TERMINAL 11
→
TO GROUND AND ROTATES THE MOTOR TO OPEN THE MOON ROOF WHILE THE SW IS BEING PUSHED TO OPEN
POSITION.
2. SLIDE CLOSE OPERATION
WITH THE IGNITION SW TURNED ON, THE MOON ROOF COMPLETELY OPEN AND MOON ROOF LIMIT SW NO. 1 AND NO. 2 BOTH ON,
WHEN THE MOON ROOF CONTROL SW IS PUSHED TO THE CLOSE POSITION A SIGNAL IS INPUT FROM TERMINAL 2 OF MOON
ROOF CONTROL SW TO TERMINAL 2 OF MOON ROOF CONTROL RELAY.
WHEN THIS OCCURS, THE RELAY IS ACTIVATED AND THE CURRENT TO TERMINAL 6 OF MOON ROOF CONTROL RELAY FLOWS
FROM TERMINAL 4
→
TERMINAL 1 OF MOON ROOF MOTOR
→
TERMINAL 3
→
TERMINAL 5 OF MOON ROOF CONTROL RELAY
→
TERMINAL 11
→
TO GROUND AND ROTATES THE MOTOR TO CLOSE THE MOON ROOF WHITE THE SW IS BEING PUSHED TO CLOSE
POSITION.
MOON ROOF LIMIT SW NO. 1 TURNS OFF (LIMIT SW NO. 2 IS ON) AND AT 200MM (7.9IN) BEFORE FULLY CLOSED POSITION, SIGNAL
IS INPUT FROM TERMINAL 2 OF LIMIT SW NO. 1 TO TERMINAL 8 OF MOON ROOF CONTROL RELAY. THIS SIGNAL ACTIVATES THE
RELAY AND STOPS CONTINUITY FROM TERMINAL 6 OF MOON ROOF CONTROL RELAY TO TERMINAL 11. AS A RESULT, THE MOON
ROOF STOPS AT THIS POSITION.
TO CLOSE THE MOON ROOF COMPLETELY, PUSHING THE MOON ROOF CONTROL SW AGAIN TO THE CLOSE SIDE CAUSES A
SIGNAL TO BE INPUT AGAIN TO TERMINAL 2 OF MOON ROOF CONTROL RELAY. THIS ACTIVATES THE RELAY AND THE MOON ROOF
WILL CLOSE AS LONG AS THE MOON ROOF CONTROL SW IS BEING PUSHED, ALLOWING THE MOON ROOF TO FULLY CLOSE.
3. TILT UP OPERATION
WHEN THE MOON ROOF CONTROL SW IS PUSHED TO TILT UP POSITION, WITH THE IGNITION SW TURNED ON AND THE MOON
ROOF COMPLETELY CLOSED (MOON ROOF LIGHT SW NO.2 IS OFF), A SIGNAL IS INPUT FROM TERMINAL 1 OF MOON ROOF
CONTROL SW TO TERMINAL 3 OF MOON ROOF CONTROL RELAY. AS A RESULT, THE RELAY IS ACTIVATED AND THE CURRENT TO
TERMINAL 6 OF RELAY FLOWS FROM TERMINAL 4 OF THE RELAY
→
TERMINAL 1 OF MOON ROOF MOTOR
→
TERMINAL 3
→
TERMINAL 5 OF RELAY
→
TERMINAL 11 TO GROUND AND ROTATES THE MOTOR SO THAT TILT UP OPERATION OCCURS AS LONG
AS THE MOON ROOF CONTROL SW IS PUSHED ON THE TILT UP SIDE.
4. TILT DOWN OPERATION
WHEN THE MOON ROOF CONTROL SW IS PUSHED TO TILT DOWN POSITION, WITH THE IGNITION SW TURNED ON AND THE MOON
ROOF TILTED UP (NO. 1 AND NO. 2 MOON ROOF LIMIT SWITCHES ARE BOTH OFF), A SIGNAL IS INPUT FROM TERMINAL 3 OF MOON
ROOF CONTROL SW TO TERMINAL 7 OF MOON ROOF CONTROL RELAY.
AS A RESULT, THE RELAY IS ACTIVATED AND THE CURRENT TO TERMINAL 6 OF RELAY FLOWS FROM TERMINAL 5 OF RELAY
→
TERMINAL 3 OF MOON ROOF MOTOR
→
TERMINAL 1
→
TERMINAL 4 OF RELAY
→
TERMINAL 11
→
TO GROUND AND ROTATES THE
MOTOR SO THAT TILT DOWN OPERATION OCCURS AS LONG AS THE MOON ROOF CONTROL SW IS PUSHED ON THE TILT DOWN
SIDE. (DURING TILT DOWN, LIMIT SW NO. 1 IS CHANGED FROM OFF TO ON.)
5. KEY OFF MOON ROOF OPERATION
WITH THE IGNITION SW TURNED FROM ON TO OFF, THE THEFT DETERRENT ECU OPERATES AND CURRENT FLOWS FROM DOOR
FUSE TO TERMINAL (A)8 OF THE ECU OR DOME FUSE TO TERMINAL (A)20 OF THE ECU
→
TERMINAL (B)8
→
TERMINAL 1 OF
POWER MAIN RELAY
→
TERMINAL 2
→
TO GROUND FOR ABOUT 60 SECONDS. THE SAME AS NORMAL OPERATION, THE CURRENT
FLOWS FROM POWER FUSE
→
TERMINAL 5 OF THE POWER MAIN RELAY
→
TERMINAL 3
→
TERMINAL 6 OF THE MOON ROOF
CONTROL RELAY. AS A RESULT, FOR ABOUT 60 SECONDS AFTER THE IGNITION SW IS TURNED OFF, THE FUNCTIONING OF THIS
RELAY MAKES IT POSSIBLE TO OPEN AND CLOSE THE MOON ROOF. ALSO, BY OPENING THE FRONT DOOR (DOOR DETECT SW
ON) WITHIN ABOUT 60 SECONDS AFTER TURNING THE IGNITION SW TO OFF, A SIGNAL IS INPUT TO TERMINALS (A)12 OR (A)13 OF
THEFT DETERRENT ECU. AS A RESULT, THE ECU TURNS OFF AND OPEN AND CLOSE MOVEMENT OF THE MOON ROOF STOPS.
SYSTEM OUTLINE
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