| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Carry
out a preliminary test to check the conditions which give rise to
the noise | The noise does not reoccur:Continue to Step 3 | The noise increases considerably
with the steering in the end of travel position | See table S35 |
| The noise also occurs with the engine switched off (when
warm) | Continue to Step 1 |
| The noise increases during braking | Continue to Step 2 |
| 1 | MULTI-PURPOSE VALVE CHECK | All OK | Problems met | Operation |
|---|
| Check
the condition of the multi-purpose valve, located on the fuel supply
pipe | Continue to Step 3 | Valve faulty | Replace the valve Op. 1080E11 |
| 2 | BRAKE SERVO VACUUM VALVE CHECK | All OK | Problems met | Operation |
|---|
| Check
the condition of the one-way valve on the brake servo vacuum pipe | Continue to Step 3 | Brake servo valve faulty | Replace the valve Op. 3330D20 |
| 3 | 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' |