Acura 2002 RSX Service Manual page 952

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Wheel Sensors

The wheel sensors are the magnetic contactless type. As the gear pulser teeth rotate past the wheel sensor's magnetic

coil. AC current is generated. The AC Jrequency changes in accordance with the wheel speed. The ABS control unit

detects the wheel sensor signal frequency and thereby detects the wheel speed.

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Wheel Spoed and Modulator Control

When the wheel speed drops sharply below the vehicle speed, the outlet valve opens momentarily to reduce the

caliper fluid pressure. The pump motor stans at this time. As the wheel speed is restored, the inlet valve opens

momentarily to increase the caliper fluid pressure.

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