169000047 - H005 POOR DRIVING COMFORT - AT FRONT

The customer complains of poor driving comfort especially noticeable at the front.
1ROAD TEST TO EVALUATE THE DRIVING COMFORTAll OKProblems encounteredOperation
Carry out a road test to evaluate the driving comfort of the front suspension    See Test 44A ROAD TEST FOR COMFORT EVALUATIONEnd of diagnosis

  • Subjective judgement compared with the reference vehicle 6
  • Subjective judgement compared with the reference vehicle 5.5
  • Subjective judgement compared with the reference vehicle 3-4

  • Acceptable behaviour of the vehicle
  • Move on to Step 2
  • Move on to Step 4
2END OF TRAVEL BUFFER CHECKAll OKProblems encounteredOperation
Raise the vehicle on a two column lift and check that the end of travel buffer is correctly inserted in its housing carrying out the    See Test 4410AA CHECKING CORRECT MOUNTING OF STOP PAD ON FRONT SHOCK-ABSORBERMove on to Step 3End of travel buffer not correctly insertedRefit the buffer correctly
3TRACK CONTROL ARM BUSHES CHECKAll OKProblems encounteredOperation
Check the condition of the track control arm bushesIn order to do so the guard under the engine must be removed    Op. 7055B54 UNDER-ENGINE GUARD - R RMove on to Step 4Track control arm bushes deterioratedReplace the track control arm    Op. 4410B40 LOWER WISHBONE (WITH BALLJOINT) OF LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R -CHECK WHEEL GEOMETRY SEPARATELY
4SHOCK ABSORBER EFFICIENCY CHECKAll OKProblems encounteredOperation
Check the efficiency of the shock absorbers by carrying out manual compression manoeuvres (resting on the bonnet by the centre of the wheel), which should be carried out on both sides of the vehicle.Move on to Step 5Sudden return without dampingReplace the shock absorber that is not working properly    Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/RE-BUILDING OF ASSEMBLY AT BENCH R R
5VEHICLE GEOMETRY CHECKAll OKProblems encounteredOperation
After replacing the shock absorbers, check the geometryEnd of diagnosisGeometry values do not conformRestore the geometry to the correct values