| | Results
of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Check
the condition of the air filter Check the condition and seal of the air supply circuit | Continue to Step 1 | Filter element dirty or
damaged | Replace
the filter element Op. 1048A14 |
| Circuit component damaged | Replace the component (see Assembly 1048A) |
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socketCheck that there are no fault in the engine management control
unit | Continue to Step 2 | An error is detected in
the control unit | Continue according to 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 iinstruments) carry
out the active diagnosis of the iinjectors. | 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 the injectors Op. 1056B70 |
| 3 | LAMBDA SENSOR CHECK | All OK | Problems met | Operation |
|---|
| Check
that the Lambda sensor is working properly | Continue to Step 4 | Lambda sensor not working properly | Replace the Lambda sensor Op. 1080B60 |
| 4 | BLOW-BY CIRCUIT CHECK | 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 5 | Blow-by circuit faulty | Restore the correct operation
of the circuit: if necessary, replace the pipes (see Assembly 1080D) |
| Fault in the separator | Replace the separator Op. 1080D34 |
| 5 | FUEL PRESSURE CHECK | All OK | Problems met | Operation |
|---|
| Check
the fuel supply pressure Op. 0510C10 | Continue to Step 6 | Pressure not correct | Replace the fuel pump assembly Op. 1040A70 |
| 6 | CHECKING 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' |