| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Visually inspect the power assisted steering fluid in the reservoir.Conduct a test by steering fully to one side and then releasing the steering wheel. | Move on to Step 1 | 1. Fluid level too low. | 1. Restore the correct level |
| 2. The noise increases towards the end of travel position and with the engine speed (roar) | 2. Move on to Step 1 |
| 3. The noise remains constant (hissing whilst steering, puffing on release) | 3. No intervention is nececssary: the noise is due to the by-pass valve that discharges the excess pressure |
| 1 | CHECK ON POWER ASSISTED STEERING FLUID QUALITY | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Visually inspect the power assisted steering fluid in the reservoir.Make sure that there is no emulsified fluid (fluid that is lighter in colour with bubbles) | Move on to Step 2 | Emulsified fluid. | Remove any air infiltrations from the power steering system pipes or replace the power steering reservoir Op. 4130B25 POWER STEERING PUMP ASSEMBLY R R FOR VERSIONS WITH AIR CONDITIONER |
| 2 | POWER ASSISTED STEERING PIPES CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check for constrictions in the flexible and rigid system pipes. | Move on to Step 3 | Pipes faulty. | Replace the damaged parts, replacing all the seals Op. 4130B POWER STEERING HYDRAULIC SYTEM |
| 3 | CHECK CORRECT OPERATION OF MPU (Motor Pump Unit) | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the MPU is working properly See Test 4110DC ELECTRIC PUMP CHECK | End of diagnosis | MPU malfunction | Replace MPU Op. 4130B25 POWER STEERING PUMP ASSEMBLY R R FOR VERSIONS WITH AIR CONDITIONER |
