| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|
| Check that the ignition circuit connection is correct and is working properly, paying special attention to: | Move on to Step 1 1 | Electrical circuit faulty | Restore the correct connections See See E5030 PETROL ENGINE ELECTRONIC MANAGEMENTReplace any fault components, if necessary.Move on to Step 10 1 |
| 1 | IGNITION COIL CHECK | All OK | Problems encountered | Operation |
|---|
| Visually inspect the operation of the coil connected to the cylinder involved using the Examiner spark gap 1806369000.In particular, check that there is a regular spark | Move on to Step 2 1 | The coil does not produce a regular spark | Move on to Step 9 1 |
| 2 | SPARK PLUG STATUS CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the spark plug electrode gap is within the permitted limits.Also check that the electrodes are not worn/broken | Move on to Step 3 1 | Spark plug faulty | Replace the spark plug Op. Op. 5510D10 SPARK PLUGS - R+RMove on to Step 10 1 |
| 3 | FUEL PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Carry out a fuel pressure test Op. Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE, by turning the ignition ON and waiting a few seconds. Then, start up normally and turn the ignition OFF after a few seconds.Check that the pressure remains at the normal values and there are no falls of more than 1.5 bar 15 minutes after switching off. Remove the injector flute complete with all the injectors Op. Op. 1056B60 TUBO COLLETTORE COMBUSTIBILE UNICO, COMPLETO DI ELETTROINIETTORI - S.R.Place a container under the injector flute. | Move on to Step 6 1 | The pressure is too low: constrictions at the supply pipe | Renew or, if necessary, replace the pipe.Move on to Step 10 1 |
| Excessive falls after switching off | Move on to Step 4 1 |
| Low pressure: fuel pump assembly faulty | Replace the fuel pump assembly Op. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + RMove on to Step 10 1 |
| 4 | INJECTOR SEAL CHECK | All OK | Problems encountered | Operation |
|---|
| Turn the ignition key ON and then OFF after a few seconds. Check that there are no fuel leaks from the injector involved by carrying out Test 1056BZ See Test 1056 PETROL INJECTION SYSTEMThen refit the injector flute Op. 1056B60 TUBO COLLETTORE COMBUSTIBILE UNICO, COMPLETO DI ELETTROINIETTORI - S.R. | Work very carefully and in safe conditions |
| Move on to Step 5 1 | The injector is leaking | Replace the injector Op. Op. 1056B70 ELETTROINIETTORE (UNO) - S.R. A TUBO COLLETTORE COMBUSTIBILE STACCATO - COMPRENDE LA SOST. DELLA GUARNIZIONEMove on to Step 10 1 |
| 5 | FUEL PUMP REPLACEMENT | All OK | Problems encountered | Operation |
|---|
| Replace the fuel pump assembly Op. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R | Move on to Step 10 1 | Fault persists | Move on to Step 10 1 |
| 6 | INJECTOR ACTIVE DIAGNOSIS | All OK | Problems encountered | Operation |
|---|
| Carry out the active diagnosis of the injector involved, checking that there is a spray from the injector during activation. Then refit the injector flute Op. Op. 1056B60 TUBO COLLETTORE COMBUSTIBILE UNICO, COMPLETO DI ELETTROINIETTORI - S.R. | Move on to Step 7 1 | Injector stuck shut | Replace the injector Op. Op. 1056B70 ELETTROINIETTORE (UNO) - S.R. A TUBO COLLETTORE COMBUSTIBILE STACCATO - COMPRENDE LA SOST. DELLA GUARNIZIONEMove on to Step 10 1 |
| 7 | CYLINDER COMPRESSION CHECK | All OK | Problems encountered | Operation |
|---|
| Carry out a compression test on the cylinder involved Op. Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS | Move on to Step 10 1 | Insufficient compression at the cylinder involved | Move on to Step 8 1 |
| 8 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems encountered | Operation |
|---|
| R/R head for valve leakage testCheck condition of cylinders/piston rings | End of diagnosis | Valve seal insufficient | Overhaul the cylinder head Op. Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAULMove on to Step 10 1 |
| Cylinders/piston rings worn | Restore the seal.Move on to Step 10 1 |
| 9 | COIL REPLACEMENT | All OK | Problems encountered | Operation |
|---|
| Exchange the coil involved with one for another cylinder Op. 5510C10 IGNITION COIL/S - R+Rand check that there is a regular spark using the Examiner spark gap 1806369000 | Move on to Step 10 1 | There is no regular spark | Repair the old coil and replace the engine management control unit Op. Op. 1056B82 CENTRALINA (UNICA) DELL''IMPIANTO INIEZIONE/ACCENSIONE - S.R.Move on to Step 10 1 |
| 10 | ERROR CANCELLING AND CHECK | All OK | Problems encountered | Operation |
|---|
| Using the diagnostic equipment, cancel the errors in the control unit.Road test the vehicle and check that the errror does not occur again | Move on to Step 11 1 | The fault persists, it is the first or second time that this Step is reached and the control unit has not yet been replaced | Move on to Step 0 1 |
| The fault persists, but it is the third time that this Step has been reached or the control unit has already been replaced | Contact the Service Department for further information on the problem |
| 11 | CHECK CORRECT OPERATION | All OK | Problems encountered | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | | |
