N73zN02M
3-50
DRIVE-CONTROL
COMPONENTS
-
ABS
<AWD>
ACTUATOR
HYDRAULIC UNIT (HU)
l
The HU, elastically supported by the shield plate
at the front left of the engine compartment, con-
sists of a motor pump, plunger valve, reservoir
and three solenoid valves.
l
The HU, positioned between the brake master
cylinder and each wheel cylinder, is a hydraulic
circuit split into two systems associated with
the normal X pipings when the ABS is inactive.
the wheel
cylinder.
When the ABS is active, the motor is operated
Lj
by a signal from the ABS-ECU to let the pump
generate a hydraulic pressure required to return
fluid against master cylinder pressure. At the
same time, three solenoid valves are operated
to control the hydraulic pressure that acts on
Solenoi
14x0305
Hydraulic unit
I-----
-
--------___
1
/
Wheel speed sensor
Master cylinder
-
-.
Solenoid valve and select-low valve
Refer to 1991 3000GT Technical Information Manual (Pub. No.
PXSE9001).
Relay box
Refer to P. 3-33.
MOTOR RELAY
Refer to P. 3-33.
VALVE RELAY
Refer to
P.
3-33.
ABS WARNING LIGHT
Refer to P. 3-33.
d
14FOO54
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