| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Having carried out the road test, see the Table S15 RUMOROSITA' in condizioni di marcia , there was a creaking noise from the rear.Continue depending on the circumstances in which the noise occurs | End of diagnosis | The noise occurs especially on unmade roads uphill, during acceleration or braking | Move on to Step 1 1 |
| The noise also occurs on smooth, undulating roads | Move on to Step 4 1 |
| 1 | BUSHES CHECK | All OK | Problems encountered | Operation |
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| Check that there are no signs of rubbing or contact between the bushes and thrust washers See Test 4420DA Verifica gioco boccole sospensioni posteriori | Move on to Step 2 1 | Signs of rubbing detected | Lubricate the elements with silicon grease | The use of unsuitable lubricants can adversely affect the operation of the component |
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| 2 | DUST COVER CHECK | All OK | Problems encountered | Operation |
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| Check that the dust cover is not rubbing against the shock absorber casing, by moving it and applying pressure and releasing it above the shock absorber casing | Move on to Step 3 | There is rubbing causing the ovalization of the dust cover | Replace the shock absorber Op. 4420A30 |
| 3 | CHECKS UNDER THE FLOOR | All OK | Problems encountered | Operation |
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| Position the vehicle on a two column lift and raise it.Check that there are no pipes, handbrake cable or heat shields under the floor that are producing noise.Also check that the handbrake bowden cables are correctly fitted in the track control arm housings | Move on to Step 4 1 | Pipes or heat shields incorrectly fastened | Renew the correct fastening |
| Handbrake cable noisy | Lubricate the handbrake cable |
| Handbrake bowden cables not correctly fastened | Renew the correct fastening |
| 4 | END OF TRAVEL BUFFER CHECK | All OK | Problems encountered | Operation |
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| Check that the end of travel buffer for the rear spring is not faulty carrying out the See Test 4420AA Verifica tampone di fine corsa molle sospensioni posteriori | Move on to Step 5 1 | Lower spring reaction mounting not correctly fitted causing absence/deterioration of plastic fixing lugs on the axle | Replace the end of travel buffer |
| Buffer deteriorated | Replace the end of travel buffer |
| 5 | RUBBER MOUNTING CHECK | All OK | Problems encountered | Operation |
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| Check that the rubber mountings securing the shock absorber do not show signs of wear on account of rubbing. Check that the lower rubber mounting is not producing creaking, in order to carry out this check the shock absorber upper fastening must be removed and the shock absorber rotated | Move on to Step 6 1 | Signs of rubbing on the rubber mountings | Lubricate the part with a layer of silicon grease | The use of unsuitable lubricants can adversely affect the operation of the component |
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| Damage to the rubber mountings | Replace the shock absorber Op. 4420A30 L/H OR R/H REAR SUSPENSION DAMPER (ONE) - R+R |
| Creaking of the lower rubber mounting | Lubricate with silicon grease, if the creaking persists, replace the shock absorber Op. 4420A30 L/H OR R/H REAR SUSPENSION DAMPER (ONE) - R+R |
| 6 | SPRING CHECK | All OK | Problems encountered | Operation |
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| Check that the spring shows no signs of wear | If the spring shows signs of abrasion, its mechanical properties could be weakened as a result of oxidation |
| End of diagnosis | Spring worn | Replace the shock absorber spring Op. 4420A48 REAR SUSPENSION COIL SPRINGS- R R |
| Upper spring rubber seal deteriorated | Replace the upper rubber seal |