3360353 - Z52 LEAN FUEL SYSTEM
.| Results of the tests | ||||
| 1 | INTAKE AND EXHAUST SYSTEM LEAKAGE CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| Check
the intake and exhaust system visually and by listening, to check
that there are no leaks downstream of the MAP sensor/flow meter. Also take into account:
| Continue to Step 2 | Leaks are present | Eliminate leaks from the system. Replace faulty parts if necessaryContinue to Step 5 | |
| 2 | PETROL PRESSURE CHECK | All OK | Problems met | Operation |
| Turn the key to MAR and check fuel pump activates.While the pump is active, check fuel pressure is not too low | Continue to Step 3 | Low pressure: fuel filter blocked/obstructed | Replace the fuel pump Op. 1040A70 Continue to Step 5 | |
| Low pressure: fuel filter blocked/obstructed | Renew or, if necessary, replace the pipes involved | |||
| Low pressure: fuel filter blocked/obstructed | Replace the fuel pump Op. 1040A70 Continue to Step 5 | |||
| Low pressure: fuel filter blocked/obstructed | Replace the fuel pump Op. 1040A70 Continue to Step 5 | |||
| Low pressure: fuel filter blocked/obstructed | Restore correct connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT If necessary, replace the fuel pump Op. 1040A70 Continue to Step 5 | |||
| Low pressure: fuel filter blocked/obstructed | Replace the fuel pump Op. 1040A70 Continue to Step 5 | |||
| 3 | CHECKING FUEL QUALITY | All OK | Problems met | Operation |
| Check that there is no water or other substances in the tank which are contaminating the fuel. | Continue to Step 4 | Impurities are present | Clean the tank Op. 1040A24and introduce new fuel. Continue to Step 5 | |
| 4 | UPSTREAM LAMBDA SENSOR CHECK | All OK | Problems met | Operation |
| Continue as instructed in Table Z056, starting from Step 3 | End of diagnosis | |||
| 5 | DELETING AND CHECKING ERROR | All OK | Problems met | Operation |
| Use a tester to cancel the errors in the control unit.Carry out a road test and ensure the error does not recur. | Continue to Step 6 | The fault persists | Continue to Step 8 | |
| 6 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | |||