Fiat 1996 Brava Service Manual page 563

Bravo-Brava Braking system
EBD device
33.
ELECTRONICALLY OPERATED BRAKE FORCE DISTRIBUTION DEVICE (EBD)
TheTeves MK20 ABS system, described in the relevant chapter of this manual, is coupled with the EBD
function (Electronic Brake-force Distribution), which electro-hydraulically controls the distribution of
the pressure sent to the brakes between the front and rear axles.
This function is controlled by the ABS electronic control unit which uses the same sensors and
actuators as the ABS circuit to calculate and implement the distribution of the braking pressure.
The introduction of this function makes the use of the conventional mechanical load proportion­
ing valve superfluous and it is removed from the rear brake hydraulic circuit.
In addition, the optimum exploitation of the rear brakes is ensured as the device is capable of con­
stantly sending the ideal braking pressure to prevent the rear wheels from locking.
The diagrams overleaf illustrate the location of the device components, the majority of which are the
same as on the ABS system.
Key for diagrams showing braking system with ABS integrated with EBD function
Hydraulic circuit for right front and left rear brake
Hydraulic circuit for left front and right rear brake
1. Hydraulic control unit with electronic control unit incorporated
2. Brake pump
3. Brake servo
4. Brake fluid reservoir
5. Rpm sensors for front wheels
6. Front disc brakes
7. Warning light signalling ABS system failure
8. Brake lights switch
9. Handbrake lever
10. Handbrake warning light or low brake fluid level
11. Rpm sensors for rear wheels
12. Rear drum brakes (excluding 1998 20v)
13. Rear disc brakes (only for 1998 20v)
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