| 1 | INTERFERENCE CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check for possible interference between the seat lifting adjustment components that could create noise/creaking (cover, lever, ratchet(s), linkage). | Move on to Step 2 | Presence of noise/creaking through contact/interference between seat lifting components. | Move the parts in contact apart and, if necessary, lubricate the linkage where the creaking is located. | Do not lubricate the ratchet. |
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| 2 | CHECK ON FRAME RATCHET ASSEMBLY | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the ratchet(s) and frame are correctly assembled. | Move on to Step 3 | Presence of noise between lever(s) and ratchet(s) and between ratchet(s) and frame as a result of loose fastening. | Retighten the badly fastened components to the correct torque or those with clearance. |
| 3 | CHECK THAT THERE IS NO NOISE FROM THE RATCHET | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check for noise from the ratchet(s) and the frame in static and dynamic conditions (with or without the adjustment of the seat). | Move on to Step 4 | 1. Noise at the ratchet | 1. Replace the ratchet(s) Op. 7045A36 DRIVER'S SEAT MANUAL HEIGHT ADJUSTMENT DEVICE - R.R |
| 2. Presence of noise at the linkage or at the torsion bar. | 2. Lubricate parts in contact or renew welding. |
| 4 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the fault is no longer present. | End of diagnosis | The fault persists | Replace the seat frame Op. 7045A86 FRONT SEAT FRAME (ONE), LEFT OR RIGHT, R.R. |