| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| After carrying out a road test during the diagnosis, a noise is heard from the front identifiable as knocking. See table S015 NOISE WHILST DRIVINGContinue depending on the circumstances in which the noise occurs | End of diagnosis | 1. The noise disappears when the brake pedal is operated.2. The noise only occurs whilst accelerating or braking with the wheels steered.3. The noise is also present in other conditions | 1. Check the clearances for the front brake calipers and lubricate the wheel bolt pins2. Replace the wheel bearing on the side where the problem occurs, positioning it with the magnetic race towards the steering knuckle ring. | This bearing is used by the ABS active sensors to calculate the wheel speed. It should NEVER come into contact with metal shavings because they could alter the gap and prevent a correct reading from the sensor |
3. Move on to Step 1 |
| 1 | OIL LEAKS CHECK | All OK | Problems encountered | Operation |
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| Raise the vehicle on a two column lift and check that there are no oil leaks from the shock absorber stem, lifting up the dust cover. | Slight dampness on the stem is considered normal because there is evaporation during the operation of the shock absorber. |
If there is a persistent oil leak on the shock absorber stem, make sure that it is not coming from other parts of the vehicle that are lubricated | Move on to Step 2 | 1. Leaks from other parts that are lubricated2. Leaks from the shock absorber stem | 1. Search for the cause of the leak following the appropriate diagnostic procedure2. Replace the shock absorber Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 2 | CHECK ON CONSTANT VELOCITY JOINT SLIDING | All OK | Problems encountered | Operation |
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| For the 1.3 JTD, 1.9 JTD;Raise the vehicle on a two column lift and rotate the front wheels by hand.Make sure that there are no impediments to the movement or noise during rotation | Move on to Step 3 | Constant velocity joint seized | Replace the constant velocity joint Op. 2710A10 DRIVESHAFT WITH JOINTS (ONE), L/H OR R/H - R + R |
| 2 | CHECK ON CONSTANT VELOCITY JOINT SLIDING | All OK | Problems encountered | Operation |
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| For the 1.2 8v, 1.4 8v;Raise the vehicle on a two column lift and rotate the front wheels by hand.Make sure that there are no impediments to the movement or noise during rotation | Move on to Step 3 | Constant velocity joint seized | Replace the constant velocity joint Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT |
| 3 | CHECK ON CORRECT TIGHTENING OF DIFFERENTIAL SIDE JOINT FLANGE | All OK | Problems encountered | Operation |
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| Check that the bolts fixing the differential side joint flange are correctly tightened | Move on to Step 4 | Torque tightenings not correct | Restore the correct tightening |
| 4 | CHECK ON INTERFERENCE BETWEEN DRIVESHAFTS AND SURROUNDING PARTS | All OK | Problems encountered | Operation |
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| Check that there is no interference between the driveshafts and adjacent parts (track control arms, front crossmember). | Move on to Step 5 | Interference between the driveshafts and adjacent parts | Restore the correct tightening of the elements causing interference |
| 5 | CHECK ON CONSTANT VELOCITY JOINT EFFICIENCY | All OK | Problems encountered | Operation |
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| For the 1.3 JTD, 1.9 JTD;Try and move the driveshaft and check that there is not excessive clearance for the constant velocity joints | Move on to Step 6 | 1. Gearbox side constant velocity joint chamber broken2. Wheel side constant velocity joint chamber broken3. Wheel side joint worn | 1. Replace the constant velocity joint Op. 2710A52 DIFFERENTIAL SIDE SLIDING JOINT (ONE) L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 2. Replace the constant velocity joint Op. 2710A52 DIFFERENTIAL SIDE SLIDING JOINT (ONE) L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 3.Replace the constant velocity joint Op. 2710A52 DIFFERENTIAL SIDE SLIDING JOINT (ONE) L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT |
| 5 | CHECK ON CONSTANT VELOCITY JOINT EFFICIENCY | All OK | Problems encountered | Operation |
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| For the 1.2 8v, 1.4 8v;Try and move the driveshaft and check that there is not excessive clearance for the constant velocity joints | Move on to Step 6 | 1. Gearbox side constant velocity joint chamber broken2. Wheel side constant velocity joint chamber broken3. Wheel side joint worn | 1. Replace the constant velocity joint Op. 2710A52 DIFFERENTIAL SIDE SLIDING JOINT (ONE) L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 2. Replace the constant velocity joint Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 3.Replace the constant velocity joint Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT |
| 6 | WHEEL SIDE BOOTS AND WHEEL BEARINGS CHECK | All OK | Problems encountered | Operation |
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| For the 1.3 JTD, 1.9 JTD;Check the condition of the wheel side boot.If it is not intact, check that there are no leaks or no grease in the actual bootIf everything is okay and the noise was more pronounced whilst steering, check the wheel bearings | Move on to Step 7 | 1. Boot broken2. Grease leaks/No grease3. Wheel bearing faulty | 1. Replace the boot Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 2. Renew the correct amount of grease of the appropriate type3. Replace the wheel bearing on the side where the problem occurs, positioning it with the magnetic race towards the steering knuckle ring. Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE |
| 6 | WHEEL SIDE BOOTS AND WHEEL BEARINGS CHECK | All OK | Problems encountered | Operation |
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| For the 1.2 8v, 1.4 8v;Check the condition of the wheel side boot.If it is not intact, check that there are no leaks or no grease in the actual bootIf everything is okay and the noise was more pronounced whilst steering, check the wheel bearings | Move on to Step 7 | 1. Boot broken2. Grease leaks/No grease3. Wheel bearing faulty | 1. Replace the boot Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 2. Renew the correct amount of grease of the appropriate type3. Replace the wheel bearing on the side where the problem occurs, positioning it with the magnetic race towards the steering knuckle ring. Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE |
| 7 | INTERFERENCE CHECK | All OK | Problems encountered | Operation |
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| Check that there are no signs of interference between the suspension elements or between the latter and the bodyshell.In particular, check that there are no signs of wear on the suspension springs and that they do not show signs of abrasion. | If the spring shows signs of abrasion, its mechanical properties could be weakened as a result of oxidation. |
| Move on to Step 8 | 1. Inteference due to incorrect fitting.2. Abrasions or non conformity of the spring | 1. Eliminate the interference and restore the correct fastening. If this is not possible, replace the defective components2. Replace the spring taking care to fit it correctly Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
| 8 | TRACK CONTROL ARM CHECK | All OK | Problems encountered | Operation |
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| Check that there is no clearance between the ball joint pin and the steering knuckle and between the ball joint flange and the track control arms and make sure that the boot is intact.In order to do this it is necessary to remove the guard under the engine, then loosen the bolt connecting the track control arm to the front steering knuckle. Op. 7055B54 UNDER ENGINE PROTECTION/GUARD - R.R. Also check the condition of the suspension bushes. | Move on to Step 9 | 1. Track control arm clearance2. Ball joint boot not intact3. Track control arm front bush not intact4. Track control arm rear bush not intact | 1. Replace the track rod end Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY 2. Replace the track rod end Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY 3. Replace the track control arm front bushOp. 4410B50 4. Replace the track control arm rear bushOp. 4410B52 |
| 9 | DIFFERENTIAL SIDE BOOT CHECK | All OK | Problems encountered | Operation |
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| For the 1.3 JTD, 1.9 JTD;Check the condition of the differential side boot.If it is not intact, check that there are no leaks or no grease in the actual boot | Move on to Step 10 | 1. Boot broken2. Grease leaks/No grease | 1. Replace the boot2. Renew the correct amount of grease of the appropriate type |
| 9 | DIFFERENTIAL SIDE BOOT CHECK | All OK | Problems encountered | Operation |
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| For the 1.2 8v, 1.4 8v;Check the condition of the differential side boot.If it is not intact, check that there are no leaks or no grease in the actual boot | Move on to Step 10 | 1. Boot broken2. Grease leaks/No grease | 1. Replace the boot Op. 2710A52 DIFFERENTIAL SIDE SLIDING JOINT (ONE) L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT 2. Renew the correct amount of grease of the appropriate type |
| 10 | WHEEL SIDE JOINT |
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