| | Results
of the tests |
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Connect
diagnostic equipment (Examiner or other instruments) to the diagnostic
socket.Check that there are no faults in the engine management control
unit |
Continue to Step
2
| An error is detected in
the control unit | Continue following the instructions for the diagnostic
equipment |
| Lack of dialogue with the control unit |
Restore the connection between the engine management
control unit and the diagnostic connector (
See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
).
|
| 2 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC
EQUIPMENT | All
OK | Problems
met | Operation |
|---|
| Using
the diagnostic equipment (Examiner or other instruments) carry out
the active diagnosis of the injectors. |
Continue to Step
3
| Connections faulty |
Restore the connection of
the solenoid valve with the control unit (
See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
).
|
| Injectors faulty |
Replace injectors
Op. 1056B70 |
| 3 | CHECKING LAMBDA SENSOR | All OK | Problems met | Operation |
|---|
|
Check
that the Lambda sensor is working properly
See Test 1080BA Checking Lambda sensor |
Continue to Step
4
| Lambda sensor not working properly |
Replace the Lambda sensor
Op. 1080B60 |
| 4 | CHECKING AIR CIRCUIT | All OK | Problems met | Operation |
|---|
| Check
the condition and seal of the air supply circuit |
Continue to Step
5
| Circuit component damaged | Replace component (See
Assembly 1048A) |
| 5 | CHECKING BLOW-BY CIRCUIT | All OK | Problems met | Operation |
|---|
| Check
the condition of the blow-by gases intake circuit.In particular, check that there are no obstructions in the separator
or in the pipes |
Continue to Step
6
| Blow-by circuit faulty | Restore the operation of
the circuit; if necessary, replace the pipes (see Assembly 1080D) |
| Fault in the separator |
Replace the separator
Op. 1080D34 |
| 6 | CHECKING FUEL PRESSURE | All OK | Problems met | Operation |
|---|
|
Check
the fuel supply pressure
Op. 0510C10 |
Continue to Step
7
| Pressure not correct |
Replace the fuel pump assembly
Op. 1040A70 |
| 7 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that the fault is no longer present | End of diagnosis | Fault persists | Search for the
fault starting from another symptom' |