Lexus ES300 (1997 year). Manual — part 634
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
IF1
4
ID1
5
BS2
3
BS2
4
BS2
1
BS2
2
1W
3
1V
10
B
20
B
22
B
9
B
8
B
18
B
13
B
14
B
19
B
15
B
17
B
16
B
12
BR
W–
R
W–
R
W–
R
B–
R
B
–
R
B–
R
B
–
R
G–
W
R–
G
G
G–
B
G–
W
Y–
G
L–
R
L–
Y
L
L–
B
R–
G
W–R
SEAT POSITION CONTROL ECU
B
S14
, S15
A
W–
R
W
DOOR COURTES
SW FRONT LH
D 9
SYSB
DCTY
RCLF
RCLR
RDWN
RUP
FDWN
FUP
SLDF
SLDR
IG
STOP
B 1
G–W
G–W
G–
W
G
–
W
TO
L
IG
H
T
F
A
IL
URE
S
E
NS
O
R
B 1
R–G
R–
G
FROM
INTEGRATION
RELAY
1
Y
B
B
JU
N
C
T
IO
N
C
O
NNE
CT
O
R
J 3
C
C
J
UNC
T
IO
N
CO
NN
E
C
T
O
R
J 5
1
2
S
T
OP
L
IGH
T
S
W
S1
0
POWER SEAT CONTROL SW
(DRIVER’ S SEAT)
P15
1
5
3
2
9
10
8
4
12
RCLF
RCLR
RDWN
RUP
FDWN
FUP
SLDF
SLDR
RE
C
L
IN
IN
G
R
EAR
VER
T
IC
A
L
FR
O
N
T
VER
T
IC
A
L
SL
ID
E
FR
O
N
T
R
EAR
DO
W
N
UP
DO
W
N
UP
FR
O
N
T
R
EAR
10A
ECU–B
2J
7
15A
STOP
1C
7
15A
ECU–IG
1D
8
1R
4
1S
2
132
POWER SEAT
IK2
2
B
B
A
A
2
BS2
10
IK2
4
B
3
B
11
B
21
B16
B16
B16
B16
B16
B16
BS2
9
IH
A
D
B
F
B
4
B
1
B
10
B
2
BR
BR
BR
BR
BR
R–L
R–L
R–
L
R–
L
G–
W
G–
W
V–
W
GR
LG
–
B
LG
–R
LG
BR
V–
W
V
–
W
V–
W
GR
V–
W
LG
–
B
V–
W
LG
–
R
V–
W
LG
BR
BR
BR
BR
BR
SEAT POSITION CONTROL ECU
B
S14
, S15
A
JUNCTION
CONNECTOR
J30
POSITION SW
ARK/NEUTRAL
OSITION SW]
P 1
JU
N
C
T
IO
N
CO
N
N
E
C
T
O
R
J2
5
PO
WER
SE
AT
P
R
( D
R
IV
E
R
’
S SE
RE
CL
IN
IN
G
CO
P2
8
PO
W
E
R
S
E
N
SO
R
(DRI
V
E
RE
A
R
R
O
L
)
P2
7
PO
W
E
R
S
E
N
SO
R
(DRI
V
E
FR
O
N
T
T
R
O
L
)
P2
6
PO
W
E
R
S
E
N
SO
R
( DRI
V
E
CO
NT
R
O
L
)
P2
9
J
UNCT
IO
N
CO
N
N
E
C
T
O
R
B
J2
8
, J2
9
A
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
7
2
2
2
2
G–
W
G–
W
BR
PVCC
SSRR
SSRV
SSFV
SSRS
SGND
P
B16
B16
B16
BR
B
R
BR
BR
BR
O
S
IT
IO
N
SEN
SO
AT
NT
R
O
L
)
SEAT
P
O
SI
T
IO
N
R
’
S SEAT
V
E
R
T
ICA
L
CO
N
T
SEAT
P
O
SI
T
IO
N
R
’
S SEAT
V
E
R
T
ICA
L
CO
N
SEAT
P
O
SI
T
IO
N
R
’
S SEAT
SL
ID
E
1
3
1
3
1
3
1
3
P
P
P
P
[
10A
GAUGE
1J
1
133
(DRIVER’S SEAT w/ DRIVING POSITION MEMORY)
A
1
A
2
A
5
A
6
A
9
A
10
A
3
A
4
B
5
B
6
B
7
M
1
2
M
1
2
M
1
2
M
2
1
SEAT POSITION CONTROL ECU
B
S14
, S15
A
SEAT MEMORY SW
P
O
WER
SEAT
M
O
T
O
R
(D
R
IVER
’
S
SEAT
SL
ID
E C
O
N
T
R
O
L
)
P2
1
P
O
WER
SEAT
M
O
T
O
R
(D
R
IVER
’
S
SEAT
F
R
O
N
T
V
E
R
T
ICA
L
CO
NT
RO
L
)
P1
7
P
O
WER
SEAT
M
O
T
O
R
(D
R
IVER
’
S
SEAT
R
EAR
V
E
R
T
ICA
L
CO
NT
RO
L
)
P1
9
P
O
WER
SEAT
M
O
T
O
R
(D
R
IVER
’
S
SEAT
RE
CL
IN
IN
G
CO
NT
RO
L
)
P2
0
Y
V
P
L
L–
B
R–
L
L–
R
L–
Y
R
R–
G
R–
B
BR
BR
RCL–
RCL+
RRV–
RRV+
FRV–
FRV+
SLD–
SLD+
SW1
SW2
MMRY
A
BN
J37
JUNCTION
CONNECTOR
IF2
8
BS2
7
BS2
8
A
8
A
7
L–
W
L–
W
L–
W
W–
B
W–
B
1
GND
+B
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
B16
L–
W
M
2
1
B16
W–
B
W–
B
L
LG
L–
W
POWER SEAT MOTOR
(DRIVER’ S SEAT
LUMBAR SUPPORT CONTROL)
P18
P14
W–B
S13
1
4
3
2
1
2
SE
T
1
2
MMRY
E
3
4
2
1
POWER SEAT CONTROL SW
(DRIVER’ S SEAT
LUMBAR SUPPORT CONTROL)
FR
O
N
T
R
EAR
30A
POWER
1D
3
2
134
POWER SEAT
135
(DRIVER’S SEAT w/ DRIVING POSITION MEMORY)
CURRENT IS ALWAYS APPLIED FROM ECU–B FUSE TO TERMINAL SYSB OF THE SEAT POSITION CONTROL ECU, FROM
POWER FUSE TO TERMINAL +B OF THE SEAT POSITION CONTROL ECU, AND FROM STOP FUSE TO TERMINAL 2 OF THE STOP
LIGHT SW.
WITH THE IGNITION SW TURNED ON, CURRENT FLOWS FROM ECU–IG FUSE TO TERMINAL IG OF THE SEAT POSITION
CONTROL ECU AND FROM THE GAUGE FUSE TO TERMINAL 2 OF THE P POSITION SW.
POWER SEAT OPERATION (DRIVER’S SEAT)
CURRENT IS ALWAYS APPLIED TO TERMINAL SYSB AND TERMINAL +B OF THE SEAT POSITION CONTROL ECU SO THAT SEAT
POSITION CONTROL ECU IS ALWAYS READY TO OPERATE.
WHEN THE POWER SEAT CONTROL SW IS PUSHED TO THE “FRONT SLIDE POSITION” SIDE, A SIGNAL IS INPUT INTO
TERMINAL SLDF OF THE SEAT POSITION CONTROL ECU, THE ECU OPERATES AND THE CURRENT TO TERMINAL +B OF THE
SEAT POSITION CONTROL ECU FLOWS FROM TERMINAL SLD+ OF THE SEAT POSITION CONTORL ECU
TERMINAL 1 OF THE
POWER SEAT MOTOR (DRIVER’S SEAD SLIDE CONTROL)
TERMINAL 2
TERMINAL SLD– OF THE SEAT POSITION CONTROL
ECU
TERMINAL GND
GROUND, ROTATING THE POWER SEAT MOTOR SO THAT THE SEAT SLIDES FORWARD WHILE THE
POWER SEAT CONTROL SW IS BEING PRESSED.
TO SLIDE THE DRIVER’S SEAT TO THE REAR, PUSHING THE POWER SEAT CONTROL SW TO THE “REAR SIDE POSITION” SIDE,
INPUTS A SIGNAL TO TERMINAL SLDR OF THE SEAT POSITION CONTROL ECU. THIS CAUSES THE CURRENT FLOWING FROM
THE ECU TO THE MOTOR TO FLOW FROM TERMINAL SLD– OF THE SEAT POSITION CONTROL ECU
TERMINAL 2 OF THE
POER SEAT MOTOR (DRIVER’S SEAT SLIDE CONTROL)
TERMINAL 1
TERMINAL SLD+ OF THE SEAT POSITION CONTROL
ECU, FLOWING THE REVERSE TO FRONT SLIDE OPERATION AND CAUSING THE MOTOR TO ROTATE IN REVERSE, SO THAT
THE DRIVER’S SEAT MOVES TO THE REAR.
THE MOVEMENT TO OTHER POSITIONS OCCURS SIMILARLY, SO ONLY THE FLOW OF CURRENT TO EACH MOTOR IS SHOWN:
FRONT VERTICAL CONTROL ‘UP’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL FRV+
TERMINAL 1 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT FRONT VERTICAL CONTROL)
TERMINAL 2
TERMINAL FRV– OF THE ECU
TERMINAL GND
GROUND.
FRONT VERTICAL CONTROL ‘DOWN’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL FRV–
TERMINAL 2 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT FRONT VERTICAL CONTROL)
TERMINAL 1
TERMINAL FRV+ OF THE ECU
TERMINAL GND
GROUND.
REAR VERTICAL CONTROL ‘UP’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL RRV+
TERMINAL 1 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT REAR VERTICAL CONTROL)
TERMINAL 2
TERMINAL RRV– OF THE ECU
TERMINAL GND
GROUND.
REAR VERTICAL CONTROL ‘DOWN’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL RRV–
TERMINAL 2 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT REAR VERTICAL CONTROL)
TERMINAL 1
TERMINAL RRV+ OF THE ECU
TERMINAL GND
GROUND.
RECLINING CONTROL OF ‘FRONT’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL RCL+
TERMINAL 2 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT RECLINING CONTROL)
TERMINAL 1
TERMINAL RCL– OF THE ECU
TERMINAL GND
GROUND.
RECLINING CONTROL OF ‘REAR’ OPERATION
TERMINAL +B OF THE SEAT POSITION CONTROL ECU
TERMINAL RCL–
TERMINAL 1 OF THE POWER SEAT MOTOR
(DRIVER’S SEAT RECLINING CONTROL)
TERMINAL 2
TERMINAL RCL+ OF THE ECU
TERMINAL GND
GROUND.
THE NUMBER OF TURNS OF EACH MOTOR (AMOUNT OF MOVEMENT OF EACH PART OF THE SEAT) IS DETECTED BY THE
POSITION SENSORS AND INPUT TO THE ECU, MAKING IT POSSIBLE TO PERFORM MEMORY AND RETURN FUNCTIONS FOR
THE SEAT POSITION USING THE SEAT MEMORY SWITCH.
SYSTEM OUTLINE
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