| | Results of the tests |
| 0 | OIL LEVEL CHECK | All OK | Problems met | Operation |
|---|
| Check the oil level as described in See Test See Test 2127B OIL LEVEL CHECK | Continue to Step 2 | Level below the Max reference | Top up the oil levelContinue to Step 1 |
| Level above the Max reference | Reduce to the Max levelContinue to Step 2 |
| 1 | CHECK FOR OIL LEAKS | All OK | Problems met | Operation |
|---|
| Check that there are no oil leaks as described in See Test See Test 2127C HYDRAULIC GEAR SELECTION SYSTEM | Continue to Step 2 | Oil leaks detected | Replace/repair the parts concerned, and top up the oil levelContinue to Step 1 |
| 2 | CONTROL UNIT ERRORS CHECK | All OK | Problems met | Operation |
|---|
| Check that there are no control unit errors. In particular: - Engagement sensor error
- Selection sensor error
- Engine speed error
- Clutch disc speed error
- Vehicle speed error
- Starting enablement relay error
- (CAN) message reception error
- CAN message transmission error
- No accelerator pedal information error
- Control unit broken error
- Brake switch error
- Microprocessor 2 error
| Continue to Step 6 | Presence of one or more of the errors included in the list | Continue to Step 3 |
| 3 | CHECKS ON FAULTS DETECTED | All OK | Problems met | Operation |
|---|
| Check the faults in accordance with See Test See Test 2127I What to do for error in Selespeed control unit | Continue to Step 4 | Faulty connections (Engagement sensor, Selection sensor, Clutch disc speed, CAN errors, No acelerator pedal information) | Repair/replace the wiringContinue to Step 4 |
| Faulty connection (Engine speed) | Repair/replace the part concernedContinue to Step 4 |
| Errors in ABS control unit | Continue according to the instructions for the diagnostic equipment |
| Errors in engine management control unit | Continue according to the instructions for the diagnostic equipment |
| CAN communication problems | Restore correct communication, if necessary replacing faulty componentsContinue to Step 4 |
| The change of state does not take place (starting enablement relay error) | Check the brake pedal switch, its attachment and the state of the wiring connections. Restore/replace the component/wiringContinue to Step 4 |
| One of the control units does not dialogue (Errors on CAN network) | Repair/replace the control unit concernedContinue to Step 4 |
| Having replaced the Robotized Gearbox control unit (Control unit broken error and/or microprocessor 2 error) | Continue to Step 4 |
| Faults detected (brake switch) | Restore/replace the component/wiringContinue to Step 4 |
| 4 | SENSOR REPLACEMENT | All OK | Problems met | Operation |
|---|
| If there is a gear engagement sensor error and no faults are detected at the connections/wiring, replace it Op. 2127E42and check that the position reading is correct by carrying out a series of C.M. | In some cases, when the sensor is dismantled, there may be iron filings deposited on the sensor head |
| It is advisable to fit tool n° 1870753001 before removing the potentiometer from the hydraulic unit |
If there is a gear selector sensor error and no faults are detected at the connections/wiring, replace it Op. 2127E40and check that the position reading is correct by carrying out a series of C.M.If there is a clutch disc speed error and no faults are detected at the connections/wiring, replace it Op. 2127E52and check that the position reading is correct by carrying out a series of C.M. | The sensor is located on the gearbox casing to the right of the reversing lights sensor |
| Continue to Step 5 | . | |
| 5 | AFTER THE CHECKS ON THE FAULTS DETECTED | All OK | Problems met | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists | Continue to Step 6 |
| 6 | CLUTCH DISC SPEED SENSOR CHECK | All OK | Problems met | Operation |
|---|
| Check the clutch disc speed signal according to the See Test See Test 2127A HYDRAULIC TRANSMISSION EXTERNAL LINKAGE | Continue to Step 9 | There are problems with the sensor signal | Continue to Step 7 |
| 7 | CHECK THE STATE OF THE CONNECTIONS | All OK | Problems met | Operation |
|---|
| Check the state of connections and wiring of the speed sensor. | In some cases, when the sensor is dismantled, there may be iron filings deposited on the sensor head |
| Continue to Step 8 | There are faults detected | Repair/replace the part that is not workingContinue to Step 9 |
| 8 | REPLACE THE CLUTCH DISC SPEED SENSOR | All OK | Problems met | Operation |
|---|
| Replace the clutch disc speed sensor Op. 2127E52 | Continue to Step 9 | . | |
| 9 | AFTER THE CHECK ON THE CLUTCH DISC SPEED SENSOR | All OK | Problems met | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists | Contact Technical Service for further information on the problem |