| | Test results |
| 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 front.Continue depending on the circumstances in which the noise occurs | End of diagnosis | The noise only occurs whilst moving | Move on to Step 1 |
| 1 | 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 casingAlso check the condition of the dust guard in the upper connection area with the spring. | Move on to Step 2 | 1. There is rubbing | 1. Replace the dust cover Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 2. Dust guard not intact in the upper area of connection with the spring. | 2. Replace the dust cover Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 2 | CHECKS IN THE ENGINE COMPARTMENT | All OK | Problems encountered | Operation |
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| Check that there are no pipes, cables or shields that could cause interference when the engine moves. | Move on to Step 3 | Components incorrectly positioned. | Reposition the components correctly. |
| 3 | UNDERFLOOR CHECK | All OK | Problems encountered | Operation |
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| Position the vehicle on a two column lift and raise it. | Move on to Step 4 | Pipes or heat shields incorrectly fastened | Renew the correct fastening. |
| 3 | UNDERFLOOR CHECK | All OK | PROBLEMS ENCOUNTERED | ACTION |
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| Position the vehicle on a two column lift and raise it.Check that there are no pipes or heat shields under the floor that are producing noiseAlso check that springs on the layout brackets are not a source of noise See Test 4410AF CHECK OF STATE OF SPRINGS ON LAYOUT BRACKETS | Move on to Step 4 | 1. Pipes or heat shields incorrectly fastened | 1. Renew the correct fastening. |
| 2. Springs or rubber mountings damaged. | 2. Replace the faulty components. |
| 4 | CHECK WISHBONE BUSHES AND PIN | All OK | Problems encountered | Operation |
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| Check for signs of rubbing between the front wishbone bush and its seatCheck also for signs of rubbing on the outer side (in the direction of motion) of the rear bush and its seat as shown in theSee Test 4410AA CHECK ON CORRECT FITTING OF END OF TRAVEL BUFFER ON FRONT SHOCK ABSORBER | Move on to Step 5 | 1. Signs of rubbing noticed between the front bushing and its seat. | 1. Lubricate the elements with silicone grease |
| 2. Signs of rubbing noted on the outer side (in the direction of motion) between the rear bushing and its seat. | 2. Replace the rear bushing Op. 4410B52 FRONT SUSPENSION LOWER TRACK CONTROL ARM REAR BUSH LEFT OR RIGHT - REPLACE AT BENCH | The use of unsuitable lubricants can adversely affect the operation of the component. |
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| 5 | ANTI-ROLL BAR CHECKS | All OK | Problems encountered | Operation |
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| Check that there are no faults with the anti-roll bar See Test 4410CA Verifiche sulla barra stabilizzatrice More specifically: - Anti-roll bar correctly positioned in relation to the centre-line of the vehicle
- condition (crumbling) of centre flexible mountings in the contact area with the bar;
- Front fastenings tightened to torque between bar and chassis
- Fastenings tightened to torque between bar and shock absorber connecting rod.
After disconnecting the upper ball joint of the shock absorber connection rod, also check that the antiroll bar does not show signs of squeaking/creaking in the central flexible blocks upon manual movement when a symmetrical load is applied. | Move on to Step 6 | 1. Torque tightenings not correct | 1. Restore the correct tightness |
| 2. Bar not correctly positioned | 2. Replace the anti-roll bar Op. 4410C10 |
| 3. Signs of tearing or damage to the central flexible mountings | 3. Replace the central flexible blocks. |
| 4. Signs of tearing on the ball joint gaiters | 4. Replace the anti-roll bar Op. 4410C10 FRONT SUSPENSION ANTI-ROLL BAR - R+R - CHECK WHEEL GEOMETRY SEPARATELY |
| 5. Loose rod operates jerkily | 5. Replace the rod Op. 4410C12 FRONT SUSPENSION ANTI ROLL BAR JOINT (END) (ONE), LH OR RH - R.R |
| 6. Creaking/squeaking of central bar flexible mounts upon manual movement. | 6. Replace the anti-roll bar Op. 4410C10 FRONT SUSPENSION ANTI-ROLL BAR - R+R - CHECK WHEEL GEOMETRY SEPARATELY |
| 6 | SPRING/SHOCK ABSORBER ASSEMBLY CHECK | All OK | Problems encountered | Operation |
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| Check the three bolts securing the block to the bod (on the shock absorber domes) are tightened to torque.Also check that the positioning and the fitting of the semi-corner assembly (spring-shock absorber assembly) is correct. See Test 4410AE CHECK ON CORRECT POSITIONING OF SPRING/SHOCK ABSORBER ASSEMBLYTo check this alignment, remove the semicorner fastening to the body and fastening to the knuckle.Check the condition of the lower spring ring and the rubber coating of the gaiter on the fastening above the spring.Check that there are no signs of rubbing on the suspension spring at its supports.Also 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 | 1. Semi corner units incorrectly positioned or fitted. | 1. Restore the correct fitting/positioning of the components |
| 2. Signs of tearing of lower rubber ring. | 2. Repalce the lower rubber ring and ensure it is correctly oriented Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 3. Signs of tearing in dust gaiter rubber coating on the upper part of the attachment with the spring. | 3. Replace the dust cover Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 4. Spring worn. | 4. Replace the shock absorber spring and check the consistency of the identification plate on the corresponding coil of the lower shock absorber spring plate. Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 5. Check the condition of the paint on the top part of the plate. | 5. Only replace the shock absorber if there is obvious abrasion Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |