Dacia Solenza (engine E7J). Manual - part 32

IGNITION AND INJECTION

17 - 34

UPSTREAM OXYGEN SENSOR HEATING CIRCUIT
1DEF : Open circuit or short-circuit
CO : open circuit
CC.O : shot circuit at mass
CC.1 : short circuit at + 12 V.

DF018

PRESENT

MEMORIZED

Conditions for diagnostic application for memorized failure:
- Start the engine and ensure that state “AC261: Upstream O2 sensor
heating” is ACTIVE.
- Or act upon the actuator control “AC261: upstream 02 sensor heating”.
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 “ET117 : Canister purging control” corresponding to the OBD i

ndicator

lighting request is affirmative. In this case, proceed as per bellow mentioned
method.

RECOMMENDATIONS

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

Check the connection and the connector state of the oxygen sensor.
Change the connector if necessary.

Check the heating resistance of the oxygen sensor. Refer to chapter ”Help” for resistance values.
Replace the sensor if necessary.

Check the presence of +12 Volts on A way of the oxygen s

ensor.

Fix the electric connection between A way oxygen sensor and the actuators relay.

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

Pin 63 injection computer > pin B oxygen sensor

Fix if necessary.

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

IGNITION AND INJECTION

17 - 35

DF 022

PRESENT

INJECTION

COMPUTER

1 . DEF : Replace the computer

Nothing to mention.

Perform a road test followed then by a new checking by means of the CLIP tester.
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

RECOMMENDATIONS

Non-conform or damaged computer.
Check if the computer the one specific for that type of vehicle.
Do not immediately replace the computer without identifying precisely its damaging cause.

Perform the following procedure:
Set the contact on and enter in dialog with the computer.
Erase the failures memorized by the injection computer.
Set the contact off and wait for the interruption of the communication computer-CLIP tester.
Set the contact on and then enter in dialog with the computer
If the failure is persisting, replace the computer.

Diagnostic – Failures interpretation

IGNITION AND INJECTION

17 - 36

DF 032

PRESENT

MEMORIZED

WATER TEMPERATURE WARNING CIRCUIT
1DEF

: Open circuit or short-circuit

CO : open circuit
CC.O : short-circuit at mass
CC.1 : shot-circuit at + 12 volts

RECOMMENDATIONS

Conditions for diagnostic application for memorized failure:
Start the engine and maintain it at over 1500 rot/min until engine fun
starting or act upon control AC212: Water temperature warning indicator.

Check the connection and the condition of the conne

ctor on the line over-heating indicator.

Replace the connector if necessary.

Check the indicator condition ( if by chance this is on)
Replace it if necessary.

Check if there is +12V at indicator.
Fix if necessary, the supply electric routing between the water temperature warning indicator and
the corresponding fuse.

Connect the 90 ways terminal box and check the insulation and continuity on pin 9 line of the
injection computer.
Fix if necessary.

If the failure is persisting after this check, refer to Instrument panel 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.

Diagnostic – Failures interpretation

AFTER

REPARATION

IGNITION AND INJECTION

17 - 37

DF038

PRESENT

MEMORIZED

DOWNSTREAM OXYG

EN SENSOR HEATING CIRCUIT

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

AFTER

REPARATION

Conditions for diagnostic application for memorized failure:
- Start the engine and ensure that state “ET03: downstream O2 sensor
heating” is active wait for an engine fan starting, and then perform a slight
acceleration for one minute.
- Or act upon the actuator control “AC262: downstream O2 sensor heating”

* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET288 : Downstream oxygen sensor heating circuit” corresponding
to the OBD indicator lighting request is affirmative. In this case, proceed as
per bellow mentioned method.

RECOMMENDATIONS

Check the connection and the connector state of the oxygen sensor.
Change the connector if necessary.

Check the heating resistance of the oxygen sensor.
Refer to chapter ” Help” in order to compare the resistance-measured value with the recommend

one.
Replace the sensor if necessary.

Check the presence of +12 Volts on A pin of the oxygen sensor.
Fix the electric connection between oxygen sensor and the actuators relay, if necessary

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

Pin 65 injection computer > pin B oxygen sensor

Fix if necessary

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

Diagnostic – Failures interpretation

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