Eobd System - Alfa Romeo 147 Owner's Manual

EOBD SYSTEM

(for versions/markets where
applicable)
The EOBD system (European On Board Di-
agnosis) allows continuous diagnosis of the
components on the car correlated with emis-
sions; it also alerts the driver, by turning on
the warning light U(on some versions to-
gether with the message + symbol on the
reconfigurable multifunction display) on the
instrument panel when these components
are no longer in peak conditions.
The objective is:
– to keep the system efficiency under con-
trol;
– warn when a fault causes emission lev-
els to increase over the threshold established
by European law;
– warn of the need to replace deteriorat-
ed components.
146
The system also has a diagnostic connector
that can be interfaced with appropriate tools,
which makes it possible to read the error codes
stored in the control unit, together with a se-
ries of specific parameters for engine opera-
tion and diagnosis.
If, turning the ignition key
to MAR, the warning light
U does not turn on or if,
while travelling it turns on glow-
ing steadily or flashing (on some
versions together with the mes-
sage + symbol on the reconfig-
urable multifunction display), con-
tact Alfa Romeo Authorised Ser-
vices as soon as possible.
IMPORTANT After eliminating the in-
convenience, to check the system com-
pletely, Alfa Romeo Authorised Services are
obliged to run a bench test and, if necessary,
road tests which may also call for a long jour-
ney.