Dacia Solenza 2004, Repair Manual

Page: 133 / 891

IGNITION AND INJECTION
17
17 - 39
DF 045
PRESENT
OR
MEMORIZED
ATMOSPHERIC PRESSURE SENSOR CIRCUIT
1 . DEF : Open circuit or short-circuit
2 DEF : Pressure evolution in manifold
Perform the operations from ” recommendations” for reparation confirmation
Fix any other possible failures
Erase the failures memorized by the injection computer.
Perform a conformity checking by means of the CLIP tester.
AFTER
REPARATION
If failure is present only when engine is running, check with the contact set on, the valve
position parameter coherence for: release acceleration pedal and maximum pressed pedal.
Easy push the acceleration pedal (from released pedal till maximum acceleration) and check that
valve position is regularly increasing.
If a.m. are not observed, the information is not conform. In such case, treat the diagnostic of this
parameter.
Check the
connector condition
of the atmospheric pressure sensor.
Replace the connector if necessary.
Check that pressure sensor is correctly connected from pneumatic point of view.
Check the pressure sensor resistance. Refer to chapter “Help” in order to compare the values of
the measured resistance with the recommended ones.
Replace the pressure sensor if necessary.
Connect the 90 ways terminal box instead of the injection computer then check the
insulation,
continuity and absence of the parasite resistance on lines:
Pin 16 injection computer > pin B atmospheric pressure sensor
Pin 15 injection computer > pin A atmospheric pressure sensor
Pin 78 injection computer > pin C atmospheric pressure sensor
Fix if necessary.
If the problem is not solved, use the recommended method for DF345 failure.
RECOMMENDATIONS
If failure “DF345”: Supply 5 volts potentiometers or sensors” is present or
memorized, this must be treated as most important.
Conditions for diagnostic application to memorized failure:
Set the contact off and wait until the communication CLIP tester-computer
is lost. Set the contact on again, and then enter in dialog with the computer.
If it is necessary, start the engine and accelerate to over 608 rot/min for a
period of minimum 10 seconds.
* If the failure is memorized with OBD indicator on, check in the context
part, if state “ET277 : Atmospheric pressure sensor circuit” corresponding
to the OBD indicator lighting request is affirmative. In this case, proceed as
per bellow mentioned method
Diagnostic – Failures interpretation
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