1991 LEXUS SC400 fuse

[x] Cancel search: fuse

Page 3897 of 4087

LEXUS SC400 1991  Service Repair Manual 
130
ECT AND A/T INDICATOR
THIS SYSTEM, ELECTRICALLY CONTROLS THE LINE PRESSURE, THROTTLE PRESSURE, LOCK±UP PRESSURE AND\
 ACCUMULATOR
PRESSURE ETC. THROUGH THE SOLENOID VALVE. THE ECT IS A SYSTEM WH

Page 3901 of 4087

LEXUS SC400 1991  Service Repair Manual 
66
.
ENGINE CONTROL
THIS SYSTEM UTILIZES AN ECU AND MAINTAINS OVERALL CONTROL OF THE ENGINE, TRANSMISSION AND SO ON. AN OUTLINE O\
F
THE ENGINE CONTROL IS EXPLAINED HERE.
1. INPUT SIGNALS
(1) WATER T

Page 3903 of 4087

LEXUS SC400 1991  Service Repair Manual 
68
ENGINE CONTROL
1 2
1
2
1
2
1
2
1
2
1
2 1J
6
1J
7
1B
4 1K
4
6 13
14
9
7
4 IE1
16
B±R
W
B±Y L±R B
Y
W
W±RW±L
W W±R
W± R
B±O
B±O
B±O
B±O
B±O B±O W
W±R
Y
B
L±R
B±Y W
B±R
B± W
W
B±O

Page 3917 of 4087

LEXUS SC400 1991  Service Repair Manual 
METER, ANALOGCurrent flow activates a magnetic
coil which causes a needle to
move, thereby providing a relative
display against a background
calibration.
LED (LIGHT EMITTING DIODE)
Upon current flow,

Page 3925 of 4087

LEXUS SC400 1991  Service Repair Manual 
80
HEADLIGHT (FOR USA)
18
97 13
OFF
TA I L
HE AD
LOW
HIGH
FL AS H
LIGHT
CONTROL SW
DIMMER SW
COMBINATION
SW C15
1J
1
2
22
4
1K
5
2
1 21
2 1
21
2
IF
I8
I5
E2
E1
IJ
IE1
19 IG1 8
44
4
6 31 19 15
6
2
6 1

Page 3931 of 4087

LEXUS SC400 1991  Service Repair Manual 
Q
R
S
T
U
V
W
X
6
HOW TO USE THIS MANUAL
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 3 OF THE POWER\
 WINDOW MASTER SW, TERMINAL 2 OF THE POWER WINDOW CONTROL RELAY
AND TERMINAL 8 O

Page 3933 of 4087

LEXUS SC400 1991  Service Repair Manual 
*  The system shown here is an EXAMPLE ONLY.  It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
POWER SOURCE (Current Flow Chart)
The chart below shows the route by which cu

Page 3935 of 4087

LEXUS SC400 1991  Service Repair Manual 
90
ILLUMINATION
1B
2
1K
5 3G
83A 12
3A
2
3A
93G 13A10
1I
3
1K
11
1J
1 3A
1
OFF
TAIL
HEAD 2 1 1 2
1G1
5
IF 1E
18 RL RV RE TC
RL RE
826 RV
7 314
4
3
4
6
G±O
G±O
G±O
G±O
L±B
Y±V
BR L G±O
W±B
W±