Dacia Solenza (engine E7J). Service 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).
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