Dacia Solenza 2004, Repair Manual

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IGNITION AND INJECTION
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At vehicles equipped with diagnostic system OBD (On Board Diagnostic), when detecting a
cause leading to an excessive pollution, on the instrument panel the OBD indicator will be on,
indicating to the driver that vehicle must be repaired to eliminate the pollution cause.
The OBD system is taking into consideration during its operation of the performing the follow-
ing diagnostics:
- electric diagnostics;
- combustion misfires diagnostics
- functional diagnostic of the upstream oxygen sensor;
- catalyst diagnostic.
Electric and combustion misfires diagnostics are permanently performed.
Functional diagnostic of the upstream oxygen sensor and catalyst diagnostic are performed one
time only during one driving, subject to reaching the imposed values of the following parameters, in
order to a.m. diagnostics commencement:
- water/air temperature conditions;
- vehicle speed condition (evaluation field);
- engine parameters conditions (inlet manifold pressure, values fields and stability);
- starting timer.
OBD information management is completing classical electric failures management.
In order to meet this requirement, it is obligatory the OBD operation as per following way:
- lighting (or blinking for some failures) of the OBD indicator;
- memorizing of the OBD failures by UCE injection.
EFFECTS ON DIAGNOSTIC AND REPARATIONS
During reparation of vehicles equipped with OBD system, a special attention will be given to
avoid the OBD indicator lighting after reparations performing and returning the vehicle to the end-
user.
Certain failures can be noticed only during driving, this being the moment when the adaptive
values are ”learned”, so: The reparation validation is obligatory imposed .
REMARK: all electric failures leading to pollution limit exceeding, will produce the OBD
indicator lighting.
ATTENTION: after each test performing, the contact setting on is imposed (key in M
position) before reading the results by means of the CLIP tester. Any contact setting off
before reading the test results, will lead to their wrong interpretation.
“On Board Diagnostic” system characteristics
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