Lexus SC300 / Lexus SC400. Manual — part 1018
113
M
6
4
5
3
1
2
1K
4
2
2
2
2
I11
B 7
B 7
I11
EB1
3
IE1
15
IP1
20
IP1
8
IP1
19
IP1
15
IP1
6
IP1
18
IP1
5
IP1
14
IE1
14
BT1
9
IP1
7
A
15
UL1
A
12
DSWP
A
7
LSWP
A
3
ACT–
A
4
ACT+
B
12
DSWH
A
5
TO
A
1
SRLY
2
5
1
3
2
3
1
2
3
1
IJ
EA
2
1
P
R
N
D
2
L
1
4
6
5
7
8
9
GR
R–
B
L
G–
W
G
W
A/T INDICATOR SW
[NEUTRAL START SW AND
BACK–UP LIGHT SW]
N 1
2
3
FROM POWER SOYURCE SYSTEM (SEE PAGE 56)
7. 5A
ST
P
N
STARTER
RELAY
THEFT DETERRENT AND DOOR LOCK ECU
LO
C
K
UN
L
O
C
K
LO
C
K
UN
L
O
C
K
D
O
O
R
KEY
L
O
C
K
A
N
D
UN
L
O
C
K
S
W
RH
D
O
O
R
L
O
CK
M
O
T
O
R,
D
O
O
R
U
N
L
O
CK
D
E
T
E
CT
IO
N
A
ND
D
OOR
OP
E
N
D
E
T
E
C
T
ION
S
W
R
H
D
OOR
L
OC
K
C
O
NT
RO
L
S
W
R
H
E
N
GI
N
E
H
OOD
C
O
U
R
T
ESY
S
W
L
U
GGA
GE
C
OM
P
A
R
T
M
E
N
T
D
O
O
R
O
PEN
ER
M
O
T
O
R
G–Y
G–L
R–B
L–W
L–R
W–B
L–R
L–R
B
Y
W
B
L–
O
B
B
L–O
B
G–
L
L–R
G–
L
B
W–
B
W–
B
L–
R
W–
B
W–
B
W–
B
W–
B
W–
B
L–
R
R–
B
G–
L
L–
W
P–
B
R–
W
G–
W
G–
Y
G–
Y
G–
W
R–
W
P–
B
L–
W
R–
B
G–
L
L–W
P–
B
R–
W
G–
W
L4
E5
D9
D1
1
D8
T 8
, T 9
B
A
M
1
IJ1
6
B–W
(A/T)
IJ2
8
B–W
B
(M/T)
(M/T)
B–
W
(A/
T
)
B–W
(M/T)
CL
UT
CH
S
T
A
RT
SW
(M/
T
)
C2
3
(A/
T
)
B33
W–
B
W–B
114
THEFT DETERRENT AND DOOR LOCK CONTROL
2
5
1K
7
1E
5
4
4
1I
7
1J
1
3
1
1
IE1
9
2
1
BM
IF
BL
BT1
8
BT1
7
IG1
2
IJ1
4
IJ1
9
B
11
HORN
B
4
SH
B
8
PRLY
A
8
+B2
B
1
LUG
B
10
DSWL
A
9
IND
4
I 7
2
1
2
1
4
3
3
15
10
1
2
BY1
8
IH
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
25A
HAZ–HORN
30A
POWER
30A
DOOR
POWER
MAIN
RELAY
W
W
W
W
G–
R
WW
B–
O
B–
O
Y–
R
W–
B
L–
W
L–
W
L–R
L–R
W–
B
W–
B
G–
B
R–
W
L–G
L–G
R–
W
G–
B
R
BR
W–
B
TRIP SW AND
THEFT DETERRENT
INDICATOR LIGHT
COMBINATION
METER
FU
E
L
L
ID
O
PEN
ER
SO
L
EN
O
ID
FU
E
L
L
ID
O
PEN
ER
S
W
THEFT
DETERRENT
HORN
HORN
RELAY
L
U
GGA
GE
C
OM
P
A
R
T
M
E
N
T
LIG
H
T
S
W
L
U
GGA
GE
C
OM
P
A
R
T
M
E
N
T
K
E
YU
N
L
O
C
KS
W
THEFT DETERRENT AND DOOR LOCK ECU
T 8
,
T 9
T 1
F1
0
F1
4
T15
C14
L6
L5
B
A
B
6
5
2
3
1
115
CURRENT ALWAYS FLOWS TO TERMINAL (A)8 OF THE DOOR LOCK ECU THROUGH THE DOOR FUSE, AND TO TERMINAL (A)20
THROUGH THE DOME FUSE.
WHEN THE IGNITION SW IS TURNED ON, THE CURRENT FLOWING THROUGH THE ECU–IG FUSE
→
TERMINAL (A)2 OF THE ECU
→
TERMINAL (B)8 FLOWS THROUGH THE COIL SIDE OF THE POWER MAIN RELAY TO GROUND, CAUSING THE RELAY TO OPERATE.
THE CURRENT FLOWING THROUGH THE POWER FUSE FLOWS TO THE DOOR LOCK CONTROL SW LH, CAUSING THE INDICATOR
LIGHT TO LIGHT UP.
1. MANUAL LOCK OPERATION
WHEN THE DOOR CONTROL SW OR KEY SW ARE PUSHED TO LOCK POSITION, A LOCK SIGNAL IS INPUT TO TERMINAL (A)17, (A)14
(FOR KEY SW) OF THE DOOR LOCK ECU AND CAUSES THE ECU TO FUNCTION. CURRENT FLOWS FROM TERMINAL (A)8 OF THE
ECU
→
TERMINAL (A)4
→
TERMINAL 5 OF THE DOOR LOCK MOTORS
→
TERMINAL 2
→
TERMINAL (A)3 OF THE ECU
→
TERMINAL
(A)16
→
TO GROUND AND THE DOOR LOCK MOTOR CAUSES THE DOOR TO LOCK.
2. MANUAL UNLOCK OPERATION
WHEN THE DOOR LOCK CONTROL SW OR KEY ARE PUSHED TO UNLOCK POSITION, AN UNLOCK SIGNAL IS INPUT TO TERMINAL
(A)18, (A)10 (FOR KEY SW LH) OR (A)15 (FOR KEY SW RH) OF THE DOOR LOCK ECU AND CAUSES THE ECU TO FUNCTION.
CURRENT FLOWS FROM TERMINAL (A)8 OF THE ECU
→
TERMINAL (A)3
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL
5
→
TERMINAL (A)4 OF THE ECU
→
TERMINAL (A)16
→
TO GROUND AND THE DOOR LOCK MOTOR CAUSES THE DOOR TO
UNLOCK.
WHEN UNLOCK OPERATION OCCURS USING THE LH DOOR KEY SW, PERFORMING THE UNLOCK OPERATION ONCE UNLOCKS
ONLY THE DRIVER’S DOOR. TO UNLOCK ALL THE OTHER DOORS TOGETHER, UNLOCK OPERATION MUST BE PERFORMED AGAIN
WITHIN 3 SECONDS OF THE FIRST OPERATION.
3. IGNITION KEY REMINDER OPERATION
* OPERATION OF DOOR LOCK BUTTON (OPERATION OF DOOR LOCK MOTORS)
WHEN THE IGNITION KEY IS IN THE CYLINDER (UNLOCK WARNING SW ON) AND THE DOOR IS OPENED AND LOCKED USING
DOOR LOCK BUTTON (DOOR LOCK MOTOR), THE DOOR IS LOCKED ONCE BUT EACH DOOR IS UNLOCKED SOON BY THE
OPERATION OF THE ECU. AS A RESULT OF ECU ACTIVATION, THE CURRENT FLOWS FROM TERMINAL (A)8 OF THE ECU
→
TERMINAL (A)3
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL 5
→
TERMINAL (A)4 OF THE ECU
→
TERMINAL (A)16
→
TO GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
THE SAME APPLIES TO OPERATION OF THE DOOR LOCK CONTROL SW AND DOOR LOCK KEY SW.
* KEY LESS LOCK OPERATION
WHEN THE IGNITION KEY IS STILL INSERTED IN THE CYLINDER (UNLOCK WARNING SW ON), THE DOOR IS OPEN AND UNLOCK
OPERATION IS PREVENTED BY KEEPING THE DOOR LOCK BUTTON PRESSED TO THE LOCK SIDE, THE DOOR IS KEPT IN THE
LOCK CONDITION. IF THE DOOR IS THEN CLOSED, A SIGNAL IS INPUT TO THE ECU FROM THE DOOR COURTESY SW. THIS
ACTIVATES THE ECU AND EACH DOOR IS UNLOCKED.
SYSTEM OUTLINE
116
THEFT DETERRENT AND DOOR LOCK CONTROL
D 7, D 8
DOOR KEY LOCK AND UNLOCK SW LH, RH
1–2 : CLOSED WITH DOOR LOCK CYLINDER UNLOCKED WITH KEY
3–2 : CLOSED WITH DOOR LOCK CYLINDER LOCKED WITH KEY
D10, D11
DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR OPEN DETECTION SW LH, RH
1–4: CLOSED
WITH
UNLOCK POSITION
E 5
ENGINE HOOD COURTESY SW
1–2:
CLOSED WITH ENGINE HOOD OPEN
I15
UNLOCK WARNING SW [IGNITION SW]
9–10: CLOSED WITH IGNITION KEY IN CYLINDER
L 5
LUGGAGE COMPARTMENT KEY UNLOCK SW
1–3:
CLOSED WITH DOOR LOCK CYLINDER UNLOCK WITH KEY
L 6
LUGGAGE COMPARTMENT LIGHT SW
1–GROUND: CLOSED WITH DOOR OPEN
T 8
(B) THEFT DETERRENT AND DOOR LOCK ECU
1–GROUND:
CONTINUITY WITH LUGGAGE COMPARTMENT DOOR TO UNLOCK POSITION
12–GROUND: CONTINUITY WITH ENGINE HOOD OPEN
10–GROUND: CONTINUITY WITH LUGGAGE COMPARTMENT DOOR OPEN
7–GROUND:
APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
T 9
(A)
THEFT DETERRENT AND DOOR LOCK ECU
1–GROUND:
APPROX. 12 VOLTS WITH SHIFT LEVER IN N OR P POSITION AND IGNITION SW AT ST POSITION
2–GROUND:
APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
6–GROUND:
CONTINUITY WITH IGNITION KEY IN CYLINDER
7–GROUND:
CONTINUITY WITH FRONT RH DOOR TO UNLOCK POSITION
8–GROUND:
ALWAYS APPROX. 12 VOLTS
10–GROUND: CONTINUITY WITH DOOR LOCK KEY SW LH TO UNLOCK POSITION
11–GROUND: CONTINUITY WITH FRONT LH DOOR TO UNLOCK POSITION
12–GROUND: CONTINUITY WITH FRONT RH DOOR OPENED
13–GROUND: CONTINUITY WITH FRONT LH DOOR OPENED
14–GROUND: CONTINUITY WITH DOOR LOCK KEY SW RH TO LOCK POSITION
15–GROUND: CONTINUITY WITH DOOR LOCK KEY SW RH TO UNLOCK POSITION
20–GROUND: ALWAYS
APPROX.
12
VOLTS
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
C14
F 9
N 1
C23
F10
P 5
D 7
F14
T 1
D 8
I15
T 8
B
D 9
L 1
T 9
A
D10
L 4
T15
D11
L 5
E 5
L 6
: RELAY BLOCKS
CODE
SEE PAGE
RELAY BLOCKS (RELAY BLOCK LOCATION)
2
ENGINE COMPARTMENT LEFT
4
LEFT KICK PANEL (J/B NO.1 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
1E
INSTRUMENT PANEL WIRE
1H
1I
COWL WIRE
1J
COWL WIRE
1K
3A
INSTRUMENT PANEL WIRE
3F
INSTRUMENT PANEL WIRE
SERVICE HINTS
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