Acura NSX 1997 Service Manual page 664

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Anti-lock Brake System (ABS) Description
Features/Construction/Operation (cont'd)
Operation
1. Ordinary Braking Function
In ordinary brake operations, the cut-off out valve in the modulator is open to transmit the hydraulic pressure from the
master cylinder to the brake calipers via the chamber A and the chamber B.
The chamber C is connected to the reservoir through the outlet valve which is normally open. It is also connected to the
hydraulic pressure source (pump, accumulator, pressure switch, etc.) via the inlet valve which is normally closed. The
chamber D serves as an air chamber. Under these conditions, the pressures of the chambers C and D are maintained at
about the atmospheric pressure, permitting regular braking operations.
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