3-30
DRIVE-CONTROL
COMPONENTS
-
ABS
<FWD>
ABS HYDRAULIC PRESSURE FUNCTION DIAGRAM
The ABS for FWD operates independently on the
right and left front wheels and controls each solenoid
hydraulic pressure is simultaneously reduced in both
valve by sensing each wheel speed sensor. It
con-
rear wheels through the use of a plunger valve.
trols the solenoid valve for the rear wheels by using
Select-low: this is a method of providing the same
the rear wheel speed sensor select-low for the right
hydraulic control to both wheels when either wheel
and left rear wheels. In other words, when either
is about to lock, matching it to the side about to
the right or left rear wheel is about to lock, the
lock, or a method to control by matching pressure
to the low side.
solenoid valve for the rear wheels is activated and
\
L)
I
Solenoid
I
7
valve
control
L
-
-
-
:
/
Wheel speed sensor
Left front
1
wheel
I
N
Master cylinder
valve
I-
control
Hydraulic unit
----_
14FOO13
Wheel speed sensor
f
I
L
Right
1
whee
I
I
frc
I
mt
left front
wheel
4
L
I
I
I
I
I
I
I
I
I
I
I
I
Solenoid
valve
r
control
I
I
/
F
(1
1
1
“1
Wheel speed sensor
Proportioning valve
”
‘ZD
.
Left rear wheel
Right rear wheel