|  |  | Results of the tests | 
| 1 | CHECK GEAR OPERATION | All OK | Problems met | Operation | 
|---|
|  | Remove
the outer seat guard  Op. 7045A42. Check that there are no
obstacles or foreign material | Continue to Step 2 | Presence of obstacles
or dirt alogn the device mechanism | Clean the device and restore operation | 
| 2 | CHECK SEAT RETAINING SYSTEM | All OK | Problems met | Operation | 
|---|
|  | Check
condition of the lever retaining system and the seat lift ratchet | Continue to Step 3 | Lever or retaining elements
broken | Replace
the lever  Op. 7045A26or other affected parts | 
| Parts incorrectly fastened | Restore the correct fastening | 
| 3 | CHECKING SEAT LIFT DEVICE | All OK | Problems met | Operation | 
|---|
|  | Remove
the seat  Op.   7045A10   . Check the seat lifting device In particular,
check the condition of the device gear teeth and ensure it is properly secured. | Continue to Step 4 | Device faulty | Repair or replace the device  Op.   7045A34   . | 
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present |  | Fault persists | Search for the fault starting from another symptom' |