Test results

First of all check the type, state and inflation pressure of the tyres. Check that the tyres are correctly fitted and the wheels are correctly fastened

Move on to Step 1

1. Tyre inflation pressure not correct

2. Tyres unsuitable or worn

3. Tyres not correctly fitted

4. Wheels not correctly fastened

1. Restore the correct tyre inflation pressure

2. Replace the tyres

3. Swap the front wheels round

4. Tighten the wheels correctly

Check:

- That the wheels are correctly balanced;

- That the wheels turn freely (brake callipers correctly fitted)

Move on to Step 2

1. Wheels not balanced

2. Front brake callipers not correctly fitted

3. Rear brake callipers not correctly fitted

1. Balance the wheels

2. Restore the correct fitting or replace the brake callipers

 Op. 3310A30 FRONT BRAKE CALIPER (ONE) - R.R

3. Restore the correct fitting or replace the brake callipers

 Op. 3310B36 REAR BRAKE CALIPER (ONE), LEFT OR RIGHT - R.R

Check the vehicle geometry and front wheel angles

 Op. 4450A10 FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARY

Move on to Step 3

1. Geometry not correct

2. Angles not correct

1. Replace the suspension springs

 Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R

2. Restore the correct angles where possible

Check the vehicle geometry and rear wheel angles

 Op. 4450A40 REAR WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT, INCLUDES ADJUSTMENT IF NECESSARY

Move on to Step 4

Geometry not correct

Replace the suspension springs

 Op. 4420A40 REAR SUSPENSION COIL SPRING (ONE), LEFT OR RIGHT - R.R.

Visually inspect the underbody.

Check that there are no accidental knocks, dents or bent suspension arms.

Move on to Step 5

Damage to the front suspension in particular

Restore or replace the damaged components

Check the condition and the operation of the wheel hub bearings

Move on to Step 6

1. Front wheel bearing worn or damaged

2. Rear wheel bearing worn or damaged

1. Replace the wheel hub bearing

 Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LEFT OR RIGHT - REPLACE

2. Replace the wheel hub bearing

 Op. 4450D10 HUB FOR ONE REAR WHEEL, L/H OR R/H - R+R WITH WHEEL REMOVED - CHECK WHEEL GEOMETRY SEPARATELY

Check the condition of the bushes and mountings. In order:

- steering box links;

- wishbone flexible supports;

- flexible mountings for anti-roll bar.

Move on to Step 7

1. Steering box links worn or damaged

2. Wishbone supports worn or damaged

3. Anti-roll bar mountings worn or damaged.

1. Replace the links

 Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY

2. Replace the supports

 Op. 4410B FRONT SUSPENSION TRACK CONTROL ARMS

3. Replace the mountings

Check the condition of the mountings for the power unit, the engine reaction rod connected to the mechanical crossmember and that the mechanical crossmember is correctly centred

Move on to Step 8

1. Power unit support mountings faulty

2. Reaction rod faulty

3. Mechanical crossmember faulty.

1. Bed-in the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque

 Op. 1008A POWER UNIT FASTENING

2. Bed-in the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque

 Op. 1008C POWER UNIT REACTION ELEMENTS

3. Bed-in the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque.

Check the condition of the differential: make sure, in particular, that there is no clearance

End of diagnosis

Irregular operation of the differential

Overhaul or replace the differential

 Op. 2110D MANUAL GEARBOX DIFFERENTIAL