| | Results
of the tests |
| 1 | CHECKING 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 | 'Supply system' error
detected | See
table Z50 |
| 'Misfire' error detected | See table Z53 |
| 'Catalytic converter' error detected | See table Z55 |
| 'Upstream lambda sensor' error detected | See table Z56 |
| 'Downstream lambda sensor' error detected | See table Z58 |
| Another error dected 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 |
| 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 injectors with the control unit |
| Injector faulty | Replace injector Op. 1056B70 |
| 3 | UPSTREAM LAMBDA SENSOR CHECK | All OK | Problems met | Operation |
|---|
| Check
that the upstream Lambda sensor is working properly. | Continue to Step 4 | Lambda sensor faulty | Replace the Lambda sensor Op. 1080B94 |
| 4 | DOWNSTREAM LAMDBA SENSOR CHECK | All OK | Problems met | Operation |
|---|
| Check
that the downstream Lambda sensor is working properly. | Continue to Step 5 | Lambda sensor faulty | Replace the Lambda sensor Op. 1080B95 |
| 5 | CHECKING AIR CIRCUIT | All OK | Problems met | Operation |
|---|
| Check
the condition of the air supply circuit | Continue to Step 6 | Circuit component damaged | Replace the component involved |
| 6 | CHECKING BLOW-BY CIRCUIT | All OK | Problems met | Operation |
|---|
| Check
the condition of the blow-by gas intake circuit, in particular,
check that there are no obstructions in the separator or the pipes | Continue to Step 7 | Faulty circuit | Restore the operation of
the system |
| Fault in the separator | Replace the separator |
| 7 | CHECK ON FUEL PRESSURE | All OK | Problems met | Operation |
|---|
| Check
the fuel supply pressure Op. 0510C10 | Continue to Step 8 | Pressure not correct | Replace the fuel pump |
| 8 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that the fault is no longer present | End of diagnosis | The fault persists | |