Fiat 1996 Brava Service Manual page 567

Bravo-Brava
Braking system
EBD device
33.
ABS failure warning light
On vehicles equipped with ABS and an EBD
device, there is a special ABS failure warning
light.
The new type of warning light, known as "IN­
TELLIGENT", comprises an LED (D2) con­
trolled by an electronic circuit which, as illus­
trated in the diagram at the side, allows the
warning light to come on both if there is an ac­
tual failure in the ABS system and if the con­
nection between pin 16 of the control unit (1)
and the instrument panel (2) is interrupted or
short circuited to earth.
D1: Protective diode
D2: LED
R1 and R2: Load resistances
EBD function failure signal
A failure in the EBD function is signalled simultaneously by the braking system failure warning light (1)
in the dashboard and the ABS system failure warning light (2) both coming on.
P4A05BD02
The warning light (1) in the dashboard coming on without the ABS warning light (2) coming on means
that there is not an EBD malfunction, but that there is a different fault (low brake fluid level, handbrake
applied).
Conversely, the ABS warning light only coming on without the warning light (1) coming on, indicates a
failure in the ABS system as described in the relevant chapter of this manual without the operation of the
EBD device being adversely affected.
If there is a failure in the EBD function, the distribution of the brake force between the front and rear
axles starts to fail with the consequent risk of the rear wheels locking during braking.
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