| TEST RESULTS |
| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the underbody on a lift as a precaution in order to be able to locate the fault since the various mechanical components are connected and some noises may be deceptive.Then check that the tyres are not worn irregularly | Move on to Step 1 | 1. Internal or external tyre wear2. Shiny parts due to rubbing3. Slack components4. Gaiters broken as a result of clearance or seizing5. Deformed components. | 1. Check the front geometry Op. 4450A10 FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARY If necessary, replace the tyres2. Replace the components that show signs of rubbing.3. Restore correct fastenings.4. Replace the steering box gaiters Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R 5. Replace the deformed parts. |
| 1 | CHECK WITH VEHICLE STATIONARY | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| With the vehicle stationary, turn the steering wheel, checking that no noises are produced. | Move on to Step 2 | 1. Vibrations coming from the area of the shock absorber due to the spring2. Vibrations coming from the area of the shock absorber due to the support. | 1. Fit a rubber tube on the spring.2. Engage or replace the components involved 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 END OF TRAVEL NOISE | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that no noise is produced when the vehicle is moved with the wheels turned completely to the left and to the right.Carry out the manoeuvre, accelerating and braking in order to subject the various bearings and joints to pressure | Move on to Step 3 | 1. There is a grinding noise2. There is a sharp bang3. Noise from wheel area4. There is a rotary noise5. There is a noise in the area of the brakes. | 1. Replace the wheel side constant velocity joint2. Fasten the joint to the hub3. Fasten the rim4. Overhaul the differential unit5. Replace the brake pad clips. |
| 3 | CHECK AT LOW SPEED OVER UNMADE SURFACE | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a road test to check that there is no noise at low speed on a good road surface.Check whether there are variations in the noise by steering gently to load the hub bearings. | Move on to Step 4 | 1. Rolling noise2. There is rubbing between the stem and half-axle3. Variations in the noise when steering. | 1. Carry out the test again with tyres of a different make. If the noise decreases a lot, change the tyres.2. Lubricate the affected parts3. Replace the hub bearingsOp. 4450C34 ONE FRONT WHEEL HUB BEARING, LEFT OR RIGHT - REPLACE WITH STEERING KNUCKLE REMOVED |
| 4 | CHECK ON NOISE AT TAKE OFF | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a road test to check that there is no noise at take off. | Move on to Step 5 | 1. Noise from the gearbox area.2. Noise from the side member area.3. Noise from the crossmember. | 1. Check the three-lobe joints and replace them if necessary2. Check the power unit supports. Restore correct fasteningsreplace them if necessary.3. Fasten the crossmember. |
| 5 | CHECK ON UNMADE ROAD | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a road test to check that there is no noise on an unmade road. | Move on to Step 6 | 1. Noise at the hubs 2. Noise from the steering area3. There is a rubber squeaking4. There is a plastic knocking5. There is a drumming noise from one of the front shock absorbers: oil leak6. There is a drumming noise from one of the rear shock absorbers: oil leak7. There is a creaking noise. | 1. Replace the ball joints. Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY 2. Replace the steering box Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R 3. Check or, if necessary, replace the anti-roll bar mountings4. Position the dust cover for the shock absorber5. 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 6. Replace the shock absorber Op. 4420A30 REAR SUSPENSION SHOCK ABSORBER (ONE), LEFT OR RIGHT - R.R. - CHECK WHEEL GEOMETRY SEPARATELY 7. Repair the cracks in the panels and/or unsoldered points |
| 6 | CHECK ON NOISE WHEN STEERING | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a road test to check that there is no noise when steering. | Move on to Step 7 | 1. Noise from one of the front shock absorbers2. Noise from one of the rear shock absorbers3. Noise from one of the arms. | 1. Fasten or, if necessary, 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. Fasten or, if necessary, replace the shock absorber Op. 4420A30 REAR SUSPENSION SHOCK ABSORBER (ONE), LEFT OR RIGHT - R.R. - CHECK WHEEL GEOMETRY SEPARATELY 3. Fasten or, if necessary, replace the arm Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY |
| 7 | CHECK AT HIGH SPEED | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a road test to check that there are no vibrations at a speed of 100 - 120 km/h round gentle bends. | End of diagnosis | 1. There are vibrations from the area of the front wheel: bearings with insufficient loading at the hub2. There are vibrations from the area of the rear wheel: bearings with insufficient loading at the hub. | 1. Replace the front hub Op. 4450C10 FRONT STEERING KNUCKLE (ONE), L/H OR R/H COMPLETE WITH WHEEL HUB - R+R WITH WHEEL REMOVED - CHECK WHEEL GEOMETRY SEPARATELY 2. Replace the rear hub Op. 4450D10 HUB FOR ONE REAR WHEEL, L/H OR R/H - R+R WITH WHEEL REMOVED - CHECK WHEEL GEOMETRY SEPARATELY |