Honda Prelude 1993 Service Manual page 886

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Table of Contents

Anti-lock Brake System (ABS)

Features/Construction/Operation (cont'd)

It brake inputs (torce exened on brake pedal) are excessively large and a possibility of wheel locking occu,s, the ABS

control unit operates the solenoid valve, closing the outlet valve and openjng the inlet valve. As a result, the high

pressure is di.ected into chamber C, the piston is pushed upward, causing the slide piston to move upward and the cut-

off valve to close. As the cut-oft valve closes, the tlow from the master cylinder to the calipet is interrupted, the volume

ol chamber B. which is connected to the caliper, increases. and the fluid pressure in the caliper declines,

When both of the valves, inlet and outlet, are closed (when only the outlet valve is activated) the pressure in the caliper is

maintained constant.

When the possibility of wheel locking ceases, it is necessary to restore the pressure in the caliper. The solenoid valve is

therefore turned off (outlet valve: open, inlet valve: closed).

Caliper Pressure

Outlet Valve

Caliper pressure declining

Caliper oressure constant

Caliper pressure increasing

Troubleshooting