Fiat 1998 Marea Weekend, Service Manual

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Marea - Marea Weekend
Braking system
Anti-lock brakes
33.
The eight solenoid valves and the electric recovery pump are operated by the electronic control unit ac-
cording to the signals from the four rpm sensors. In particular, the pump allows the recovery of brake
fluid during the pressure reduction stage making it available once again upstream of the solenoid valves
for the subsequent pressure increase stage.
The low pressure accumulators make it possible to absorb brake fluid during the pressure reduction
stage.
The unit is connected to the braking system by means of connectors which can be identified by the codes
stamped on them as illustrated in the diagrams.
The electro-hydraulic control unit cannot be overhauled and should not be tampered with.
If a fault is confirmed, it should be replaced.
It is available as spares filled with brake fluid and with the solenoid valves not supplied.
The operation of bleeding and refilling the braking system is the same as for conventional systems.
NOTE To avoid errors when connecting the various braking system circuits during repair operations,
the electro-hydraulic unit connections are different sizes (M10x1 and M12x1) and also the
connectors can be identified by the codes on them as illustrated in the diagram.
P 4 F 0 S B O 0 1
Identification of electro-hydraulic control unit outlets
HZ1. Supply connector from brake pump M12x1 (primary circuit)
HZ2. Supply connector from brake pump M10x1 (secondary circuit)
VL. Supply connector to the left front brake caliper M12x1
HL. Supply connector to left rear brake caliper M12x1
VR. Supply connector to the right front brake caliper M10x1
HR. Supply connector to right rear brake caliper M10x1
1. Electro-hydraulic control unit
2. Electric recovery pump
J
3. Electronic control unit
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