Acura NSX 1991 Manual page 519

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Anti-lock Brake System (ABS) Description
Features/Construction/Operation (cont'd)
3. Responses when fluid is leaking
(1) In case of leaking from the primary system
Since the fluid pressure on the primary side does not rise, the primary piston is pushed by the fluid pressure of
the secondary piston and the tension of the piston spring until the end hits on the cylinder; the braking is per-
formed by the fluid pressure on the secondary side.
(2) In case of leaking from the secondary system
The secondary piston does not produce fluid pressure, keeps moving ahead, hits on the end surface of the
primary piston so that the primary piston is pushed under the same condition as an ordinary rod; the braking is
performed by the fluid pressure on the primary side.
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