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Dacia Solenza (engine E7J). Manual - part 33

IGNITION AND INJECTION

17 - 38

DF 044

PRESENT

MEMORIZED

RECOMMENDATIONS

ANTI-STARTING CIRCUIT
1 . DEF : Open circuit or short-circuit

Nothing to mention.

Check the connection and condition of the coded line, starting from injection computer pin 58
Replace the computer connector if necessary.

Connect the 90 ways terminal box instead of the injection computer then check the insulation and
the continuity of the coded line starting from injection computer pin 58.
Fix if necessary

If failure is persisting, refer to anti-starting system diagnostic.

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

Diagnostic – Failures interpretation

IGNITION AND INJECTION

17 - 39

DF 045

PRESENT

MEMORIZED

ATMOSPHERIC

PRESSURE SENSOR CIRCUIT

1 . DEF : Open circuit or short-circuit
2 DEF : Pressure evolution in manifold

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

IGNITION AND INJECTION

17 - 40

DF 052

PRESENT

MEMORIZED

AFTER

REPARATION

Check the connection and condition of the injector 1 connector.
Replace the connector if necessary.

Check the injector resistance. Refer to chapter “Help” in order to compare the resistance values.
Replace the injector if necessary.

When setting the contact on, check the presence of supplying +12 V on pin 1 of the injector 1.
Fix, if necessary the electric routing up to actuators relay.

Connect the 90 ways terminal box instead of the injection computer then check the insulation and
continuity on line:

pin 59 injection computer > pin 2 injector 1

Fix if necessary.

If after these checking the problem is persisting, treat the other failures then perform the conformity
checking

RECOMMENDATIONS

Conditions for diagnostic application to memorized failure:
Start the engine and especially stop it immediately the failure is becoming
present, so that catalyst-damaging risk is avoided.
In case of failures addition, treat as most important, failure “ DF009 actuators
relay control circuit”

* If the failure is memorized with OBD indicator on, check in the context
part, if state “ET278 : Cylinder injector circuit” corresponding to the OBD
indicator lighting request is affirmative. In this case, proceed as per bellow
mentioned method.

Diagnostic – Failures interpretation

CYLINDER 1 INJECTOR

CIRCUIT

1. DEF Open circuit or short-circuit
CO : open circuit
CC.O : shot circuit at mass
CC.1 : short circuit at + 12 V.

IGNITION AND INJECTION

17 - 41

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

DF 053

PRESENT

MEMORIZED

Check the connection and condition of the injector 2 connector.
Replace the connector if necessary.

Check the injector 2 resistance. Refer to chapter “Help” in order to compare the resistance values.
Replace the injector if necessary.

When setting the contact on, check the presence of supplying +12 V on pin 1 of the injector 2.
Fix, if necessary the electric routing up to actuators relay.

Connect the 90 ways terminal box instead of the injection computer then check the insulation and
continuity on line:

pin 90 injection computer > pin 2 injector 2

Fix if necessary.

If after these checking the problem is persisting, treat the other failures then perform the
conformity checking.

RECOMMENDATIONS

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET279 : Cylinder 2 injector circuit” corresponding to the OBD
indicator lighting request is affirmative. In this case, proceed as per bellow
mentioned method

Diagnostic – Failures interpretation

CYLINDER 2 INJECTOR

CIRCUIT

1. DEF : Open circuit or short-circuit
CO : open circuit
CC.O : shot circuit at mass
CC.1 : short circuit at + 12 V.

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