1996 HONDA CIVIC Hydraulic

I
NOTE: Wash the knuckle and hub thoroughly in
high flash point solvent before reassembly.
31. Press a new wheel bearing into the knuckle using
the specialtools and a press as shown
NOTE: Place the wheel bearing onto the knuckle
with the pack seal (metal color) toward the inside
Be careful not to damage the sleeve of the pack
seal.
Press
HANOI.E07749 - 001
DRIVERATTACHMENT58x72mm07947 - 6340201
DOUBLE LIP SEAL
{BLACK COLOR)
KNUCKLE
SUPPORT BASE07965 - SD90100
Installthe circlip securely in the knuckle groove'
Installthe splash guard, and tighten the screws.
scREws5 N.m (0.5 kgd m, 4lbt'ft)
32.
33.
l-,
18-15
34. lnstall the hub on the knuckle using the specialtools
shown and a hydraulic press as shown.
CAUTION: Take care not to distort tho splash gusrd'
HUB/ASSEMBLYGUIDE ATTACHMENT07GAF- SEflt2d)
KNUCKLE
FRONT HUB
SUPPORT BASE
07966 - StXx)100SPLASH GUARD
tnstall the knuckle in the reverse order of removal'
and pay particular attention to the following items:
. Be careful not to damage the ball joint boots
when installing the knuckle.
. Torque all mounting hardware to the specified
torque valugs.
. Torque the castls nuts to the low€r torque specl-
fications, then tighten them only far enough to
align the slot with the pin hole. Do not align the
castle nut by loosening.
. lnstall new cotter pins into the castle nuts after
torquing.
. Avoid twistin0 the sensor wires when installing
the wheel ssnsor.
. Before installing the brake disc, clean the mating
surfaces of the front hub and the inside of the
brake disc.
. Before installing the wheel, clean the mating sur-
face ofthe brake disc and the inside of the wheel
. Check the front wheel alignment, and adjust it if
necessary (see page 18-4).

Anti-lock Brake System {ABS)
Operation (cont'dl
ABS Modulator
The ABS modulator consists of the inlet solenoid valve, outlet solenoid valve, reservoir, pump, pump motor and thedamping chamber.
The modulator reduces the caliper fluid pressure directly, and it is also referred to as a circulating type because the brake fluidcirculates through the caliper, reservoir and the master cylinder.The hydraulic control has three modes: pressure reducing, pressure retaining, and pressure intensifying.The hydraulic circuit is the independent four channel type, one channel for each wheel.
RF LR
Pressure intensifying mode: Inlet valve open, outlet valve closed
Pressure retaining mode:
Pressure reducing mode:
Motor operation mode:
rN: INLETVALVE {NORMALtY OpENIOUT: OUTIET VALVE {NORMALIY CTOSED)Master cylinder fluid is pumped out to the caliDer.Inlet valve closed, outlet valve closedCaliper fluid is retained by the inlet valve and outlet valve.Inlet valve closed, outlet valve oDenCaliper fluid flows through the outlet valve to the reservoir.When starting the pressure reducing mode, the pump motor is ON.When stopping ABS operation, the pump motor is OFF.The reservoir fluid is pumped out by the pump, through the damping chamber, to the mastercvlinder.
PUMP MOTOR
19-48

- How the Circuit Works
The anti-lock brake system (ABS) prevents locking
of the wheels as a result of heavy braking and/or
poor lraction. A vehicle with locked wheels cannot
be steered. The anti-lock brake system controls the
application of the brakes, allowing the driver to
maintain control of the steering.
Under anti-lock conditions, the antilock brake
system (ABS) modulates the pressure of the brake
tluid to each brake caliper. This system is a four
channel system: the pressure at each caliper is
controlled independently of the pressure al any
other caliper. Whenever a wheel is likely to lock
dunng braking, the anti-lock brake system
modulates the brake oressure at that wheel. When
the brake pressure is reduced to the point where
there is no longer any possibility of wheel locking,
the system returns to the conventional braking
system mode of operation.
Battery voltage is applied at all times through fuse
63 to the ABS control unit. When the ignition switch
is in ON (ll), battery voltage is supplied to the
control unit through fuse 16. The control unit is case
grounded. Inputs are received from the brake switch
and the individual wheel sensors located at each
wheel. The ABS control unit uses these inputs to
control the modulator solenoid unit. The solenoids
adjust the hydraulic pressure applied to each
calioer.
The ABS control unit has a self-diagnosis function.
When the control unit detects a fault, it turns on the"ABS" indicator and disables the anti-lock brake
system. lf the fault is not in the conventional braking
system, the brakes will continue to operate normally
but without the anti-lock feature.
Refer to the Service Manual (Section '19,
Anti-Lock Brake System) for specific tests or
troubleshooting procedures.
44-3