| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a test steering fully in various conditions to check the actual onset of the hardening in both directions.Visually inspect the power assisted steering fluid level in the reservoir. | Move on to Step 1 | 1. Hardening in one direction only | 1. Proceed as instructed in the See table H011 STEERING HARD / (IN ONE DIRECTION ONLY) |
| 2. Power assisted steering fluid level too low. | 2. Restore the correct level; if there are leaks, eliminate them |
| 1 | CHECK ON TYPE OF PROBLEM | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Carry out a test steering fully in various conditions: check the way in which the problem starts. | Continuous and constant hardening: move on to Step 2 | 1. Hardening only during idling. | 1. Check for constrictions in the system flexible and rigid pipes. If necessary, replace the damaged parts, replacing all the seals, see Assembly. |
| 2. Hardening in end of travel position. | 2. Restore the correct vehicle geometry, see Assembly Op. 4450A WHEEL GEOMETRY |
| 2 | STEERING RODS AND ARMS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the condition of the steering rods and arms. | Move on to Step 3 | 1. Rods damaged or worn. | 1. Replace the rods Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY |
| 2. Arms damaged or worn. | 2. Replace the steering box Op. 4130A10 POWER STEERING BOX - R+R |
| 3 | STEERING COLUMN BEARINGS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the condition of the steering column support bearings and that they are working properly. | Move on to Step 4 | Bearings worn or damaged | Restore the efficiency of the steering column. If necessary, replace the bearings involved. |
| 4 | RACK AND PINION CLEARANCE CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the rack and pinion clearance with the steering column detached and the wheels straight. | Move on to Step 5 | Rack and pinion clearance too large | Replace the steering box Op. 4130A10 POWER STEERING BOX - R+R |
| 5 | RACK CLEARANCE AND STEERING BOX FASTENINGS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the bushes-rack radial clearance.Check that the steering box fastening is correct. | Move on to Step 6 | 1. Rack-bushes clearance too large. | 1. Replace the steering box Op. 4130A10 POWER STEERING BOX - R+R |
| 2. Steering box fastening not correct. | 2. Restore correct fastenings. |
| 6 | CHECK ON CORRECT TENSION OF DRIVE BELT AND CORRECT OPERATION OF POWER ASSISTED STEERING PUMP | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the tension of the power assisted steering pump drive belt is correct and that it is not worn.Also check that the power assisted steering pump is working properly. | Move on to Step 7 | 1. Belt not correctly tensioned. | 1. Restore correct belt tension. Op. 1092C10 POWER STEERING AND/OR SELF-LEVELLING SUSPENSION PUMP DRIVE BELT - R + R |
| 2. Belt worn. | 2. Replace the belt. Op. 1092C10 POWER STEERING AND/OR SELF-LEVELLING SUSPENSION PUMP DRIVE BELT - R + R |
| 3. Power assisted steering pump malfunction. | 3. Replace the power assisted steering pump. Op. 4130B20 POWER STEERING PUMP - R.R. |
| 7 | STEERING WHEEL RETURN CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Refit all the components removed.Test the vehicle and check that the steering wheel returns correctly. | End of diagnosis | Poor steering wheel return. | Restore the correct front wheel geometry Op. 4450A10 FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARY |
