Dacia Solenza (engine E7J). Instruction - page 30

IGNITION AND INJECTION

17

17 - 26

DF002

PRESENT

OR

MEMORIZED

VALVE POTENTIOMETER CIRCUIT
1. DEF : Open circuit or short-circuit

AFTER

REPARATION

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.

RECOMMENDATIONS

If failure “DF345 : Supply 5 volts potentiometers or transducers” is present
or memorized, this must be treated with priority.

Conditions for diagnostic application for memorized failure:
- Set the contact on and maintain it like this for 10 seconds in the released
pedal position.
- Easy alter the potentiometer valve position, from released pedal to maximum
acceleration.
- Maintain the pedal in the maximum pressed position for 10 seconds.
(The failure must pass to the present state, but it may become again memorized
immediately after finishing performing the previous operations).

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET284 : Valve potentiometer circuit” corresponding to the OBD
indicator lighting request is affirmative. In this case, proceed as per bellow
mentioned method.

Check the connection and the state of the valve potentiometer connector.
Replace its connector if necessary.

Perform measurement of the valve potentiometer resistance (resistance is zero or infinite in case of
sure failure).
Check that potentiometer resistance is progressively increasing, by acting upon the valve from
released acceleration pedal position to the maximal acceleration pedal.
(Use chapter “Help” in order to compare the measured resistance values compared with
recommended ones).
Check if the valve is well acting the potentiometer.
Make it working or replace the potentiometer 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 75 injection computer

> pin A valve potentiometer

Pin 74 injection computer

> pin B valve potentiometer

Pin 43 injection computer

> pin C valve potentiometer.

Fix if necessary

If the problem is persisting after these checking, use the fixing method for failure DF345.

Diagnostic – Failures interpretation

IGNITION AND INJECTION

17

17 - 27

DF003

PRESENT

OR

MEMORIZED

AIR TEMPERATURE SENSOR CIRCUIT
1. DEF : Open circuit or short-circuit

RECOMMENDATIONS

AFTER

REPARATION

Check the connection and the state of the air temperature sensor connector.
Replace the sensor’s connector if necessary.

Check that resistance of air temperature sensor is not zero or infinite (sensor sure failure).
(Use chapter “Help” in order to compare the measured resistance values compared with
recommended ones).

Replace the air temperature 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 77 injection computer

> pin 1 air temperature sensor

Pin 49 injection computer > pin 2 air temperature sensor

Fix if necessary

Check the correct evolution of the sensor resistance subject to air temperature.
Replace the air temperature sensor if necessary.

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

Diagnostic – Failures interpretation

If failure “DF345 : Supply 5 volts potentiometers or transducers” is present
or memorized, this must be treated with priority.

Conditions for failure detection by the computer:
- Set the contact on
- If the failure is only memorized, start the engine in order to obtain a temperature
variation ( an engine cooling fan starting).
(The failure must pass to the present state, but it may become again memorized
immediately after finishing performing the previous operations).

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET274 : Air temperature sensor circuit” corresponding to the OBD
indicator lighting request is affirmative. In this case, proceed as per bellow
mentioned method.

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.

IGNITION AND INJECTION

17

17 - 28

Diagnostic – Failures interpretation

DF004

PRESENT

OR

MEMORIZED

WATER TEMPERATURE SENSOR CIRCUIT
1. DEF : Open circuit or short-circuit

RECOMMENDATIONS

AFTER

REPARATION

Check the connection and the state of the air temperature sensor connector.
Replace the connector if necessary.

Check that resistance of water temperature sensor is not zero or infinite (sensor sure failure).
Use chapter “Help” in order to compare the measured resistance values compared with
recommended ones).
Replace the water temperature 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 73 injection computer > pin B1 water temperature sensor
Pin 13 injection computer > pin B2 water temperature sensor

Fix if necessary

Check the correct evolution of the sensor resistance subject to the temperature.
Replace the water temperature sensor if necessary.

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

If failure “DF345 : Supply 5 volts potentiometers or transducers” is present
or memorized, this must be treated with priority.

Conditions for failure detection by the compu

ter:

- Set the contact on
- If the failure is only memorized, start the engine in order to obtain a temperature
variation (an engine cooling fan starting).
(The failure must pass to the present state, but it may become again memorized
immediately after finishing performing the previous operations).

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET275 : Water temperature sensor circuit” corresponding to the
OBD indicator lighting request is affirmative. In this case, proceed as per
bellow mentioned method.

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.

IGNITION AND INJECTION

17

17 - 29

AFTER

REPARATION

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.

Check the connection and the state of the detonation sensor connector.
Replace the sensor’s connector if necessary.

Check the tightening of the RPM sensor on the engine block
Fix 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 20 injection computer > p

in 1 detonation sensor

Pin 79 injection computer > p

in 2 detonation sensor

Pin 19 injection computer >

RPM sensor screening

Fix if necessary

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

RECOMMENDATIONS

Conditions for diagnostic application for memorized failure:
Perform a road test with warm and in charge engine.

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET289 : Detonation sensor circuit” corresponding to the OBD
indicator lighting request is affirmative. In this case, proceed as per bellow
mentioned method.

Diagnostic – Failures interpretation

DF006

PRESENT

OR

MEMORIZED

DETONATION SENSOR CIRCUIT
1. DEF : Open circuit or short-circuit

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