| | Results of the tests |
| 0 | 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
| Continue to Step 4 | Presence of one or more
of the errors included in the list | Continue to Step 1 |
| 1 | CHECKS ON FAULTS DETECTED | All OK | Problems met | Operation |
|---|
| Check
the faults described in Test 2127I | Continue to Step 2 | Faulty connections | Repair/replace the wiringContinue
to Step 2 |
| 2 | 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. 2127E42 and check
that the position reading is correct by carrying out a series of
C.M.If there is a gear selector sensor error and no faults are detected
at the connections/wiring, replace it Op. 2127E40 and check
that the position reading is correct by carrying out a series of
C.M. | It is advisable to mark the two
potentiometers in order to be able to recognize them once they have
been removed |
| Continue to Step 3 | . | |
| 3 | 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 4 |
| 4 | OIL LEVEL CHECK | All OK | Problems met | Operation |
|---|
| Check
the oil level as described in See Test 2127B OIL LEVEL CHECK | Continue to Step 6 | Level below the Max reference | Top up the oil levelContinue
to Step 5 |
| Level above the Max reference | Reduce to the Max levelContinue to Step 6 |
| 5 | CHECK FOR OIL LEAKS | All OK | Problems met | Operation |
|---|
| Check
that there are no oil leaks as described in See Test 2127C CHECK FOR OIL LEAKS | Continue to Step 6 | Oil leaks detected | Replace/repair the parts concerned,
and top up the oil levelContinue to Step 5 |
| 6 | PARAMETERS CHECK USING THE EXAMINER | All OK | Problems met | Operation |
|---|
| Check
that the failed engagements counters in the parameters environment
(failed engagement counters for: neutral, 1st-5th and reverse) are
all at zero. | Continue to Step 9 | These counters are at
a value different from zero | Make a note of/print out the screen showing the
failed engagement countersContinue to Step 7 |
| 7 | SELF CALIBRATION | All OK | Problems met | Operation |
|---|
| With
the Examiner Plus or Smart, in active diagnosis start end-of-line/Service
self-calibration | Continue to Step 8 | The self-calibration is
not successful | Continue according to the instructions for the diagnostic
equipment |
| 8 | ROAD TEST | All OK | Problems met | Operation |
|---|
| Carry
out a road test, making sure to make as many gear changes as possible
with all the available gears (under different engine speed and load conditions).Check the failed engagement counters in the parameters environment
(failed engagement counters in: neutral, 1st-5th and Reverse).Print out/make a note of the new counter values.Compare the new values of the parameters with those noted down
previously, checking that there is not a signficant increase for
one or several counters | End of diagnosis | There is a significant
increase for one or more counters | Replace the gearbox Op. 2110A11 |
| 9 | THE FAULT PERSISTS | All OK | Problems met | Operation |
|---|
| The fault may be caused by false
contacts on the gear lever: check the state of the connections and wiring
for the lever. - At all events, contact Technical Service for further information
on the problem.
| End of diagnosis | . | |