Dacia Solenza (engine E7J). Manual — part 36

IGNITION AND INJECTION

17

17 - 50

DF102

PRESENT

OR

MEMORIZED

Check for leakage on exhaust line.

If the vehicle is mostly driven in town, perform an oxygen sensor cleaning.

Check the connection and condition of the oxygen sensor connector .
Replace the connector if necessary.

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

Pin 45 injection computer

> pin C upstream oxygen sensor

Pin 80 injection computer >

pin D upstream sensor

Pin 63 injection computer >

pin B upstream sensor

Fix it if necessary.

If the problem is persisting, replace the oxygen sensor.

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

Note any other functional failures.
Fix any other possible failures.

AFTER

REPARATION

RECOMMENDATIONS

OXYGEN SENSOR FUNCTIONAL FAILURE
It shows an incoherent information received b means of the upstream
oxygen sensor.

Apply this diagnostic if the failure is present or memorized.

Diagnostic – Failures interpretation

IGNITION AND INJECTION

17

17 - 51

DF 106

PRESENT

OR

MEMORIZED

RECOMME

NDATI

ONS

Note any other functional failures.
Fix any other possible failures.

AFTER

REPARATION

Apply this diagnostic if the failure is present or memorized.

CATALYST FUNCTIONAL

FAILURE

It shows an incoherent information received before and after catalyst by
means of the two oxygen sensors.

Check for leakage on exhaust line.
Fix it if necessary.

Perform a visual checking of the catalyst condition. O deformation may be the explanation for its
non-operation.
Check if the catalyst has not previously suffered thermal shocks.

If cold water is getting on a warm catalyst it may cause its damaging.

Check for oil or cooling fluid excessive consumption Ask the client if he has used an additive or a
similar product. This type of product may inhibit the catalyst and render it inefficient on short or
long term.

Check if there was any combustion misfires. These may damage the catalyst.

Check during a drive test for any noises during running.

If the damaging cause has been found, you may replace the catalyst. If you replace the catalyst
without detecting the cause, the new catalyst may be damaged also very quickly.

Diagnostic – Failures interpretation

IGNITION AND INJECTION

17

17 - 52

RECOMME

NDATI

ONS

Diagnostic – Failures interpretation

DF 109
DF 110

PRESENT

OR

MEMORIZED

POLLUTED COMBUSTION

MISFIRE

DESTRUCTIVE COMBUSTION MISFIRE

State ET014 : Recognition of the cylinder 1 must be active, in order to
identify each cylinder.
ET093 : combustion misfire on cylinder 1
ET094 : combustion misfire on cylinder 2
ET095 : combustion misfire on cylinder 3
ET096 : combustion misfire on cylinder 4
These will provide information regarding failure cause and location.

In this situation, the problem is probably due to an element that can act
only on one cylinder:
- Problem at injector

A cylinder is declared

- Problem at spark plug

damaged: ET093 or ET094

- Problem at high voltage cable.

or ET095 or ET096.

Before replacement, try the spark plug or cable changing to another
cylinder.

Cylinders 1 and 4 or

In this cylinders 2 and 3 declared situation, the problem is probably

damaged: ET093 and ET096

due to an element that can act only this pair of cylinders:

or ET094 and ET095.

- Problem at ignition coil, at the high voltage part.
- Problem at ignition coil, at the control part

In this situation, the problem is probably due to an element that can

Four cylinders declared

act only on all cylinders:

damaged: ET093 and

-Problem at fuel filter

ET094 or ET095 and ET096.

-Problem at fuel pump
-Problem on in use fuel type
-Problem of in use spark plugs

In case by using this method the problem is not solved, consult the failures diagnostic DF109 / DF

110 CONTINUA

TION

Ensure that all failures are solved. Erase all memorized failures.
There is no need to erase the “adaptive values” memorized by the injection computer.
In order to check the correct reparation of the system, the following conditions must be

AFTER

accomplished:

REPARATION - No more electrical failures;

- All “adaptive values” to be memorized by the injection computer;
- Warm engine (minimum 75°C);
- Run at idling, all consumers being in use for 20 minutes (1 minute DF110);
- If the failure is again occurring, repeat the diagnostic.

IGNITION AND INJECTION

17

17 - 53

Diagnostic – Failures interpretation

DF 109

DF 110

CONTINUATION

ET093 : combustion misfire on cylinder 1
ET094 : combustion misfire on cylinder 2

RECOMMENDATIONS

ET095 : combustion misfire on cylinder 3
ET096 : combustion misfire on cylinder 4
These will provide information regarding failure cause and location.

Check the ignition system ( refer to chapter “Help”).
Fix it if necessary.

Check the engine compression.
Fix it if necessary.

Check the flywheel condition , in order to get a correct information of the engine RPM.
Fix it if necessary.

If no failure has been found, there is a problem on the fuel supply circuit.
In this situation the following must be checked:
-

Fuel filter

-

Fuel pressure and flow

-

Fuel pump condition

-

Fuel tank cleaning condition]

-

Injectors conditions

Mend the fuel supply circuit.

Ensure that all failures are solved. Erase the memorized failures.
There is no need to erase the “adaptive values” memorized by the injection
computer. In order to check the correct reparation of the system, the following
conditions must be accomplished:

AFTER

- No more electrical failures.

REPARATION

- All “adaptive values” to be memorized by the injection computer.
- Warm engine (minimum 75°C)
- Run at idling, all consumers being in use for 20 minutes (1 minute
DF110).