Engine Control System (Eobd) - Alfa Romeo 166 Booklet

ENGINE CONTROL
SYSTEM (EOBD)
(versions in compliance with Directive
98/69/EC – EURO3 or Directive
2001/1/EC level B – EURO4)
The EOBD (European On Board Diagno-
sis) system fitted on the car conforms with
the 98/69/EC (EURO3) Directive for 2.0
T.SPARK, 2.5 V6 24V, 3.0 V6 24V (S-
portronic), JTD, JTD 20V Multijet and JTD
20V Multijet (Sportronic) versions and
with the 2001/1/EC level B (EURO4) Di-
rective for 3.2 V6 24V version.
This system continuously monitors the
components of the vehicle related to e-
missions; it also indicates, when the U
warning light comes on on the instrument
panel, that the components in question
are in poor condition.
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The objective is the following:
– to keep under control the efficiency of
the system;
– to indicate when a malfunction caus-
es an increase in the emissions beyond
the threshold established by European
regulations;
– to indicate the need to replace the
deteriorated components.
The system also has a diagnostic con-
nector, which can be interfaced with ade-
quate instruments, that enables the error
codes stored in the control unit to be
read, together with a series of specific pa-
rameters concerning the operation and di-
agnosis of the engine.
If, when the ignition key
is turned to MAR, the
U warning light does
not come on or if, when driving, it
lights up and emits a fixed light
or a flashing one, contact an Alfa
Romeo Authorized Service Station
as soon as possible.
IMPORTANT After the problem has
been resolved, to completely check the
system, the Alfa Romeo Authorized Ser-
vice Station must carry out tests on a test
bench and, if necessary, road tests that
could be long.