Dacia Solenza 2004, Repair Manual

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IGNITION AND INJECTION
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This diagnostic may detect:
- spark plug fouling or smoking,
- fouling or modification from the normal value of the injectors flow,
- fuel supply system abnormalities (pressure controller, fuel pump,..)
- problems with the electric connections for controlling fuel supply circuits and the injection.
The diagnostic is performed by variations measurement of the engine prompt rotation speed.
Notice of a couple decrease is allowing the defective combustion recognition as failure cause.
This diagnostic is done almost permanently during driving. Non accomplishment of the diagnos-
tic or recognition of the existence of failure, is leading to other OBD diagnostics inhibition.
This diagnostic is enabling the identification of two types of failures:
- destructive combustion misfires, which are causing the catalyst damage. These are gener-
ating the immediate blinking of the OBD indicator.
- Polluting combustion misfires, leading to exceeding a pre-established OBD pollution limit.
These are generating the permanent lighting of the OBD indicator, if the cause detection is
taken place during three consecutive running.
DETECTION CONDITIONS
At the beginning, it must be checked if the “learning” stages of the adaptive values by the UCE
injection have been correctly performed. Also the preliminary conditions imposed when setting the
contact on and those from checking moment, must be accomplished.
Check by means of the CLIP tester if the bellow mentioned states are in the following configu-
ration:
ET014 Cylinder 1 recognition----------------------------------------------------------------- DONE
ET202 OBD diagnostic of combustion misfires taken into consideration--------------ACTIVE
Detection is accomplished after the water temperature is exceeding 75°C, at three rotation
steps, between idling and 4500 rot/min. It is also possible, test performing by maintaining the engine
at idling for a period of time of 11 minutes.
ATTENTION: after performing this test, 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.
If after test performing, the CLIP tester is noticing the presence of the combustion mis-
fires, refer to the diagnostic method related to this symptom.
CONFIRMATION OF THE REPARATION PERFORMING
- Check by means of the CLIP tester, the bellow states, which must have the following
configuration:
ET014 Cylinder 1 recognition -------------------------------------------------------------------- DONE
ET202 OBD diagnostic of combustion misfires taken into consideration ----------------- ACTIVE
- No failures is detected by the CLIP tester, and the OBD indicator must be off.
Diagnostic of combustion misfires detection
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