Eobd System - Alfa Romeo 156 GTA Owner's Manual

EOBD SYSTEM

The EOBD (European On Board Diagnosis)
system fitted in the car conforms with the
EC 98/69 (EURO 3) Directive.
This system continuously monitors the com-
ponents of the vehicle related to emissions;
it also indicates, when the warning light
comes on on the instrument panel (together
with the message + symbol shown by the dis-
play) that the components in question are in
poor conditions.
The objective is the following:
– to keep under control the efficiency of
the system;
– to indicate when a malfunction causes
an increase in the emissions beyond the
threshold established by European regula-
tions;
– to indicate the need to replace the de-
teriorated components.
The system also has a diagnostic connec-
tor, which can be interfaced with adequate in-
struments, that enables the error codes stored
in the control unit to be read, together with
a series of specific parameters concerning the
operation and diagnosis of the engine. This
check can also be made by the traffic con-
trol agents.
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If, when the ignition key
is turned to MAR, the
warning light does not
come on or if, when driving, it
lights up and emits a fixed light or
a flashing one (together with the
message + symbol shown by the
display), contact an Alfa Romeo
Authorized Service Station as soon
U
as possible. The operation of the
U
warning light can also be
checked by means of special equip-
ment available to the traffic con-
trol officers. Comply with the reg-
ulations in force in country where
you drive your car.
IMPORTANT After the problem has beel
U
resolved, to completely check the system,
the Alfa Romeo Authorized Service Station
must carry out tests on a test bench and, if
necessary, road tests that could be long.