| | Results of the tests |
| 1 | CHECK ON TYPE OF NOISE | All OK | Problems met | Operation |
|---|
| Check
that the noise is not the metallic/mechanical type over unmade roads | Continue to Step 6 | The noise is the metallic/mechanical
type | Continue
to Step 2 |
| 2 | MECHANICAL CHECK | All OK | Problems met | Operation |
|---|
| Check
the condition of the steering column gear and/or steering box supports. | Continue to Step 6 | The bearing is intact. | Replace the EPS system
steering column.) |
| The bearing is intact. | Replace the system electric motor Op. 4110D30 |
| 3 | CHECK ON CONDITIONS IN WHICH THE
FAULT OCCURS | All
OK | Problems
met | Operation |
|---|
| Check
whether the noise persists even without the driver's Air Bag | Continue to Step 4 | The fault does not occur
after the driver's Air Bag has been removed | Do not adjust the EPS system,
but the Air Bag system |
| 4 | CHECK ON CONDITIONS IN WHICH THE
FAULT OCCURS | All
OK | Problems
met | Operation |
|---|
| Check
that the noise continues unchanged after the steering wheel has
been turned in both directions | Continue to Step 5 | The noise lessens when
the steering wheel is turned in both directions | Replace the EPS system
intermediate shaft |
| 5 | CHECK ON CONDITIONS IN WHICH THE
FAULT OCCURS | All
OK | Problems
met | Operation |
|---|
| Check
whether the noise alters according to the steering conditions (clockwise
rotation, anti-clockwise, steering wheel aligned) | Continue to Step 6 | The noise is the same
in all steering conditions (clockwise rotation, anti-clockwise, steering
wheel aligned) | Replace the insulator (flexible coupling) |
| 4 | CHECK ON CONDITIONS IN WHICH THE
FAULT OCCURS | All
OK | Problems
met | Operation |
|---|
| Check
the intensity of the noise when steering in a clockwise direction | End of diagnosis | The noise lessens when
the steering wheel is turned in a clockwise direction | Replace the EPS system Op. 4110D20 |