199000795 - H020 STEERING WHEEL OSCILLATIONS / VIBRATIONS / WHILST DRIVING

There are rapid oscillations in the steering on a straight road at speed
Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
First of all check the type, state and inflation pressure of the tyres. Check that the wheels are correctly fastenedMove on to Step 11. Tyre inflation pressure not correct2. Tyres unsuitable or worn3. Wheel not correctly fastened1. Restore the correct tyre inflation pressure2. Replace the tyres3. Tighten the wheels correctly
1WHEEL CHECKAll OKProblems encounteredOperation
Check:- That the wheels are correctly balanced;- The condition of the wheel rims (they should not show signs of dents or distortions)Move on to Step 21. Wheels not balanced2. Rims dented or distorted1. Balance the wheels2. Replace the rims
2WHEEL ALIGNMENT CHECKAll OKProblems encounteredOperation
Check the wheel alignmentMove on to Step 3Alignment not correctRestore the correct vehicle alignment
3ENGINE FLEXIBLE MOUNTINGS CHECKAll OKProblems encounteredOperation
Check the condition of the engine frame, supports and connecting rod connecting the engine to the mechanical crossmemberMove on to Step 41. Engine flexible mountings faulty2. Reaction connecting rod faulty3. Mechanical crossmember faulty1. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque.    Op. 1008A POWER UNIT FASTENING 2. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque.    Op. 1008C POWER UNIT REACTION ELEMENTS 3. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque.
4BUSHES AND FLEXIBLE MOUNTINGS CHECKAll OKProblems encounteredOperation
Check the condition of the bushes and mountings. In order:- steering box rod pin with joint;- lower wishbone bushes;- anti-roll bar flexible mountingsMove on to Step 51. Steering box rod pin with joint worn or damaged2. Bushes for wishbones worn or damaged3. Anti-roll bar flexible mountings worn or damaged1. Replace the rods    Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY 2. Replace the lower wishbones    Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY 3. Replace the flexible mountings
5SPRING SHOCK ABSORBER ASSEMBLY CHECKAll OKProblems encounteredOperation
Check:- The condition of the shock absorbers and springs and that they are working properly;- The fastenings for the spring/shock absorber assembly.Move on to Step 61. Tightening not correct2. Shock absorbers not working properly3. Springs not working properly.1. Restore the correct fastening2. Replace the shock absorber involved    Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R 3. Replace the spring involved    Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R
6STEERING RODS AND ARMS CHECKAll OKProblems encounteredOperation
Check the condition of the steering rods and armsMove on to Step 71. Rods damaged or worn2. Arms damaged or worn1. Replace the rods or joints    Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY 2. Replace the steering box
7STEERING COLUMN BEARINGS CHECKAll OKProblems encounteredOperation
Check the condition of the steering column support bearings and that they are working properlyEnd of diagnosisBearings worn or damagedRestore the efficiency of the steering column. If necessary, replace the bearings involved