Del Sol Si VTEC L4-1590cc 1.6L DOHC (VTEC) MFI (1997)
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ABS Pump Assembly: Description and Operation
ABS Pump Assembly
The power unit consists of a motor, filter, guide, piston rod and cylinder body. Since a guide is positioned off-set to the center of the motor shaft, the
rotation of the motor and cylinder body provides the reciprocating motion to the piston rod. The brake fluid is thus pressurized and fed to the relief
valve, accumulator and modulator. As the pressure in the accumulator exceeds the prescribed level, the pressure switch is turned on. Approx. 0.5 seconds
after receiving the ON-signal, the ABS control unit stops the motor relay operation. In this state, the pressure in the accumulator reaches 23,000 kPa
(230 kg/cm2, 3,270 psi). If the pressure doesn't reach the prescribed value after the motor has operated continuously for a specified period, the ABS
control unit stops the motor and activates the ABS indicator light.
