| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Visually
inspect the power assisted steering fluid level in the reservoirCarry out a test by steering on full lock and then releasing
the steering wheel |
Continue to Step
1
| Level too low | Restore the correct level
if there are leaks,
See table
X30
|
| The noise increases towards the end of travel position
and with the engine speed (roaring) |
Continue to Step
1
|
| The noise remains constant (hissing during steering,
puffing on release) | No intervention of any sort is needed: the noise is due
to the by-pass valve discharing excess pressure |
| 1 | POWER ASSISTED STEERING FLUID QUALITY
CHECK | All
OK | Problems
met | Operation |
|---|
| Visually
inspect the power assisted steering fluid in the reservoir. Make
sure that there is no emulsified oil (oil which is lighter in colour
and with bubbles) |
Continue to Step
2
| Emulsified fluid | Eliminate any air penetration
through the power assisted steering system pipes (see Assembly 4130B) |
| 2 | POWER ASSISTED STEERING PIPES CHECK | All OK | Problems met | Operation |
|---|
| Check
whether there are any restrictions in the system pipes, flexible
and rigid |
Continue to Step
3
| Pipes faulty | Replace the damaged parts,
replacing all the seals (see Assembly 4130B) |
| 3 | POWER ASSISTED STEERING PUMP CHECK | All OK | Problems met | Operation |
|---|
| Check
that the power assisted steering pump is working properly |
Continue to Step
4
| Power assisted steering
pump malfunction |
Replace the power assisted steering pump
Op. 4130B20 |
| 4 | HECK ON 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' |