Honda 2004 Odyssey Service Manual page 1251

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ABS Components
System Description (cont'd)
Features
When the brake pedal is pressed during driving, the wheels can lock before the vehicle comes to a stop. In such an
event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is
reduced if the rear wheels are locked, creating an extremely unstable condition. The ABS precisely controls the slip
rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures maneuverability and stability
of the vehicle.
The ABS calculates the slip rate of the wheels based on the vehicle speed and the wheel speed, then it controls the
brake fluid pressure to reach the target slip rate.
Grip Force of Tire and Road Surface
FR
WHEEL
SENSOR
WHEEL
SENSOR
FL
19-50
COEFFICIENT OF
FRICTION
MASTER CYLINDER
DAMPING
NO
NO
CHAMBER
P
M
PUMP
MOTOR
NC
NC
RESERVOIR
MODULATOR UNIT
TARGET SLIP RATE
ROTATIONAL
DIRECTION
RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTION
SLIP RATE
NO
NO
ABS
P
CONTROL
PUMP
UNIT
NC
NC
RESERVOIR
RR
WHEEL
SENSOR
WHEEL
WHEEL
SENSOR
SENSOR
SIGNAL
SIGNAL
SOLENOID
VALVE
CONTROL
WHEEL
SOLENOID
SENSOR
VALVE
SIGNAL
CONTROL
WHEEL
SENSOR
SIGNAL
WHEEL
SENSOR
RL
NO: Normally Open
NC: Normally Closed

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