1995 Honda Accord Owner's Manual - Page 231

1995 Honda Accord Manual

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Anti-lock Brake System The Anti-lock Brake System (ABS) is standard equipment on the LX V-6, EX. EX V-6 models in the U.S. and the EX-R, EX V-6. EX-R V-6 models in Canada. It is optional on the LX model in the U.S. and the EX model in Canada. The ABS works by measuring how fast the wheels are turning during braking and comparing their speed. If any wheel is rotating much slower than the others (on the verge of locking up and skidding), the system reduces hydraulic pressure to that wheel's brake caliper. When that wheel's speed matches the other wheels, the system applies normal hydraulic pressure. This can take place several times per second at each wheel. You feel the ABS working as rapid pulsations in the brake pedal. Each wheel has a wheel speed sensor assembly. As the wheel rotates, the sensor sends electrical pulses to the ABS control unit. The pulse frequency varies with the wheel speed. The electrical output of the ABS control unit is connected to the modulator/solenoid unit. During braking, the ABS control unit monitors the pulse frequencies from the four wheels. When the control unit detects a wheel locking up, it energizes the appropriate solenoid in the modulator/solenoid unit. There are six solenoids: two for each front wheel, and two for the rear wheels. The energized solenoid reduces hydraulic pressure to one side of a modulator valve. This, in turn, reduces hydraulic pressure in the brake line going to the affected wheel. When that wheel speeds up because of the reduced braking effort, the control unit de-energizes the solenoid. This builds hydraulic pressure on the modulator valve. The pressure increases in the hydraulic line to the wheel. For the system to react quickly, the modulator/solenoid unit must have brake fluid under high pressure. This is supplied by a piston-type accumulator that is pressurized by an electric pump. A pressure-sensing switch on the accumulator controls this pump. The control unit also contains error detection circuitry. It monitors the operation of the wheel sensors, solenoids, pump, and electronics. If the control unit detects any faults, it shuts off power to the pump motor and solenoids. The light on the instrument panel comes on. The brakes then work like a conventional system without anti-lock capabilities. Technical Information

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Anti-lock Brake System
The Anti-lock Brake System (ABS)
is standard equipment on the LX V-6,
EX. EX V-6 models in the U.S. and
the EX-R, EX V-6. EX-R V-6 models
in Canada. It is optional on the LX
model in the U.S. and the EX model
in Canada.
The ABS works by measuring how
fast the wheels are turning during
braking and comparing their speed.
If any wheel is rotating much slower
than the others (on the verge of
locking up and skidding), the system
reduces hydraulic pressure to that
wheel's brake caliper. When that
wheel's speed matches the other
wheels, the system applies normal
hydraulic pressure. This can take
place several times per second at
each wheel. You feel the ABS
working as rapid pulsations in the
brake pedal.
Each wheel has a wheel speed
sensor assembly. As the wheel
rotates, the sensor sends electrical
pulses to the ABS control unit. The
pulse frequency varies with the
wheel speed.
The electrical output of the ABS
control unit is connected to the
modulator/solenoid unit. During
braking, the ABS control unit
monitors the pulse frequencies from
the four wheels. When the control
unit detects a wheel locking up, it
energizes the appropriate solenoid in
the modulator/solenoid unit. There
are six solenoids: two for each front
wheel, and two for the rear wheels.
The energized solenoid reduces
hydraulic pressure to one side of a
modulator valve. This, in turn,
reduces hydraulic pressure in the
brake line going to the affected
wheel. When that wheel speeds up
because of the reduced braking
effort, the control unit de-energizes
the solenoid. This builds hydraulic
pressure on the modulator valve.
The pressure increases in the
hydraulic line to the wheel.
For the system to react quickly, the
modulator/solenoid unit must have
brake fluid under high pressure.
This is supplied by a piston-type
accumulator that is pressurized by
an electric pump. A pressure-sensing
switch on the accumulator controls
this pump.
The control unit also contains error
detection circuitry. It monitors the
operation of the wheel sensors,
solenoids, pump, and electronics. If
the control unit detects any faults, it
shuts off power to the pump motor
and solenoids. The light on the
instrument panel comes on. The
brakes then work like a conventional
system without anti-lock capabilities.
Technical Information