Lexus SC300 / Lexus SC400. Manual — part 1002
125
P 5
POWER WINDOW MASTER AND DOOR LOCK CONTROL SW LH
4–GROUND: APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
8–GROUND: ALWAYS CONTINUITY
10–GROUND: APPROX. 12 VOLTS WITH IGNITION SW ON AND MASTER SW (DRIVER’S WINDOW) AT UP POSITION
9–GROUND: APPROX. 12 VOLTS WITH IGNITION SW ON AND MASTER SW (DRIVER’S WINDOW) AT DOWN OR AUTO DOWN
POSITION
WINDOW LOCK SW
OPEN WITH WINDOW LOCK SW AT LOCK POSITION
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
D10
P 5
T 8
B
D11
P 6
T 9
A
P 4
P 7
: 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
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)
IF2
FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
IP1
FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
: 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 4
FRONT DOOR LH WIRE
SERVICE HINTS
186
PPS (PROGRESSIVE POWER STEERING)
1H
12
1E
12
1I
9
IJ1
10
IK1
7
IK1
6
IG2
7
IJ2
6
IJ2
16
1
2
10A
GAUGE
15A
ECU–IG
COMBINATION METER
SPEED
SENSOR
NO. 1
PPS SOLENOID
PPS ECU
3
2
1
5
4
2
3
1
OUT
VCC
GND
Y
SPD
E
SOL+
SOL–
+B
B–
R
Y
Y
PP
W–
B
LG
–B
LG
–
R
LG
–
B
LG
–R
W–
B
R
R
L–
R
Y
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
S 3
P 1
P 2
C14
BR
13
15
10
1
14
3D
13
3A
4
Y
IH
IJ
B
2
A
2
SHORT
CONNECTOR
L–
R
L–
R
S22
, S 23
B
A
1
10
15
14
13
1
2
1 2 3 4 5
1
2
3
GRAY
GRAY
C14
P 1
P 2
S 3
X
2
2
B
A
S22
S23
187
THE PPS (HYDRAULIC REACTION TYPE) CONTROLS THE HYDRAULIC PRESSURE APPLIED TO THE HYDRAULIC REACTION
CHAMBER IN THE GEAR BOX CONTROL UNIT USING THE PPS ECU, TO CHANGE THE STEERING FORCE AND PROVIDE OPTIMUM
STEERING FEELING AT ANY VEHICLE SPEED AND UNDER ANY STEERING CONDITIONS.
(PPS OPERATION)
WHEN THE IGNITION SW IS TURNED ON THE STARTING CURRENT FLOWS FROM THE ECU–IG FUSE TO TERMINAL 4 OF THE PPS
ECU. THE SPEED SENSOR MONITORS THE VEHICLE SPEED AND TRANSMITS CONTROL SIGNALS TO TERMINAL 3 OF THE ECU.
WHEN THE VEHICLE SPEED IS LOW, THE PPS ECU SENDS A HIGHER–VOLTAGE FROM TERMINAL 1 OF THE ECU
→
TERMINAL 1 OF
THE SOLENOID VALVE
→
TERMINAL 2
→
TERMINAL 5 OF THE ECU
→
TERMINAL 2
→
GROUND, INCREASING THE SOLENOID VALVE
OPENING ANGLE TO PROVIDE COMFORTABLE STEERING OPERATION. WHEN THE VEHICLE SPEED IS HIGH, THE PPS ECU
DECREASES THE SOLENOID VALVE OPENING ANGLE BY REDUCING THE VOLTAGE TO THE VALVE TO PROVIDE RESPONSIVE
STEERING FEELING.
P 1
PPS SOLENOID
1–2 : APPROX. 7.7
(25
°
C, 77
°
F)
P 2
PPS ECU
4–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
2–GROUND : ALWAYS CONTINUITY
1–5 :
APPROX. 0.8A WITH VEHICLE SPEED BELOW 20 KM/H (12 MPH)
APPROX. 0.45A WITH VEHICLE SPEED AT 80 KM/H (48 MPH)
APPROX. 0.2A WITH VEHICLE SPEED ABOVE 160 KM/H (96 MPH)
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
C14
P 2
S22
B
P 1
S 3
S23
A
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE
SEE PAGE
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E
INSTRUMENT PANEL WIRE
1H
COWL WIRE
1I
COWL WIRE
3A
INSTRUMENT PANEL WIRE
3D
INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE
SEE PAGE
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IG2
INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IJ1
ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
IJ2
ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
IK1
ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODE
SEE PAGE
GROUND POINTS LOCATION
IH
UNDER THE ASHTRAY LH
IJ
RIGHT KICK PANEL
SYSTEM OUTLINE
SERVICE HINTS
162
POWER SEAT (w/o DRIVING POSITION MEMORY)
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
30A
DOOR
1C
8
Ba2
4
BK
Ba2
5
POWER SEAT CONTROL SW
(FOR DRIVER’ S SEAT)
R
EAR
FR
O
N
T
HO
L
D
RE
L
E
A
S
E
1
2
12
7
UP
DO
W
N
FR
O
N
T
R
EAR
UP
DO
W
N
5
6
4
3
9
8
10
11
P 8
M
1
2
M
2
1
M
2
1
M
2
1
M
2
1
G–
R
G
L
L–
B
L–
Y
L–
R
Y–
R
Y–
B
Y–
G
Y–
L
L–
W
L–
W
W–
B
W–
B
POWER SEAT MOTOR
(FOR DRIVER’ S SEAT
SLIDE CONTROL)
POWER SEAT MOTOR
(FOR DRIVER’ S SEAT
FRONT VERTICAL
CONTROL)
POWER SEAT MOTOR
(FOR DRIVER’ S SEAT
RECLINING MOTOR
CONTROL)
POWER SEAT MOTOR
(FOR DRIVER’ S SEAT
REAR VERTICAL
CONTROL)
POWER SEAT MOTOR
(FOR DRIVER’ S SEAT
LUMBAR SUPPORT
CONTROL)
P17
P13
P16
P15
P14
SLIDE
FRONT VERTICAL
RECLINING
REAR VERTICAL
LUMBAR SUPPORT
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