| 1 | ERRORS IN CONTROL UNIT CHECK | All OK | Problems encountered | Operation |
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| Connect an Examiner, select "CAN information", and check for any control units in error | Move on to Step 2 | Presence of errors | Continue as instructed by the diagnostic equipment |
| 2 | GEAR LEVER CHECK | All OK | Problems encountered | Operation |
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| Connect an Examiner to the gearbox control unit and select GEAR LEVER POSITION in parameters modeMake all possible gear lever selections, checking the correct status change on ExaminerIf the display is not correct, check the connections, wiring continuity and the gear lever See E7051 ROBOTIZED GEARBOX Check that the gear lever is working properly, carrying out the See Test 2127OL GEAR LEVER CHECKCheck that the lever is working correctly and especially that it is secure in the automatic (Auto) to Manual position contacts | Move on to Step 3 | The lever states displayed are not correct. Lever contact not secure | Replace the gear lever Op. 2127A12 HAND LEVER FOR MANUAL GEARBOX WITH HYDRAULIC SELECTION - R.R. |
| Faulty lever wiring | Restore correct lever wiring. |
| 3 | GEARBOX CONTROL UNIT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check the condition of the connections and the continuity of the wiring between the lever and the gearbox control unit.Check that the gearbox control unit is working properly | End of diagnosis | Slack connections at the gearbox control unit | Renew the correct connections |
| Gearbox control unit faulty | Replace the gearbox control unit Op. 2127E10 HYDRAULIC SPEED SELECTION SYSTEM CONTROL UNIT - R.R. |
