Fiat 1998 Marea Weekend, Service Manual

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Braking system
Anti-lock brakes
Marea - Marea Weekend
33.
The integration of the EBA function in the regular ABS system logic gives the possibility of two simulta-
neous strategies; the system usually intervenes to keep the creeping of the rear wheels within values
which are very close to the ideal figures, with the possibility, however, of intervening with the ABS strat-
egy when one of the rear wheels tends to lock (for example when driving over a surface with poor adhe-
sion).
The graph below illustrates the braking pressure implementation strategy, operated by the electronic
control unit, on the basis of the input data, represented by the signal for the rotation speed of the wheels
on the two axles.
E. Rear wheel speed
F. Front wheel speed
G. Front wheel pressure
H. Rear wheel pressure
EBA OPERATION
The braking pressure of the wheels on the rear axle are checked by the control unit in the same way as
described for the ABS operation in the "Pressure maintenance stage" and the "Pressure reduction
stage", with the difference being that the electric recovery pump is not activated and any excess hy-
draulic fluid is recovered in the low pressure accumulator. The fluid returns to the supply circuit when
the braking is over.
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