Integra LS Coupe L4-1834cc 1.8L DOHC MFI (1997)
ABS Pump Motor: Description and Operation
NOTE: The Anti-lock Brake System (ABS) pump and motor are integral parts of the ABS modulator unit.
LOW PRESSURE OPERATION
As the motor rotates, it drives the plunger-type ABS Pump and raises the brake fluid pressure to approximately 25 mPa (3,600 psi). The eccentric
bearing is attached to the motor shaft end; it contacts the plunger of the pump plunger. The motor shaft's rotational motion is transmitted to the
reciprocating motion of the pump plunger.
HIGH PRESSURE OPERATION
When the plunger is pushed, the brake fluid in the plunger chamber is pressurized and fed to the accumulator, solenoid, and piston, via the check
valve. When the pressure in the accumulator exceeds 34 mPa (5,000 psi), the relief valve opens to release the excess brake fluid pressure to the
reservoir, thereby protecting the system.
