| | Results of the tests |
| 0 | OIL LEVEL CHECK | All OK | Problems met | Operation |
|---|
| Check
the oil level See Test 2127B OIL LEVEL CHECK | Continue to Step 2 | Level below Max reference | Top up the oil levelContinue
to Step 1 |
| Level above Max reference | Reduce to Max levelContinue to Step 2 |
| 1 | CHECK FOR OIL LEAKS | All OK | Problems met | Operation |
|---|
| Check
that there are no oil leaks See Test 2127C CHECK FOR FLUID LEAKS | Continue to Step 2 | Oil leaks detected | Replace/repair the relevant
parts, 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
| Continue to Step 5 | 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 See Test 2127I What to do depending on the error' present in the Selespeed control unit No accelerator pedal information. | End of diagnosis | Faulty connections (Engagement
sensor, Selector sensor) | Repair/replace the wiringContinue
to Step 4 |
| There are no faulty connections (Engagement sensor) | Replace the engagement potentiometer and check the correct reading
of the position by carrying out a series of gear changes.Continue
to Step 4 |
| There are no faulty connections (Selection sensor) | Replace the selector potentiometer and check the correct reading
of the position by carrying out a series of gear changes.Continue
to Step 4 |
| 4 | 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 5 |
| 5 | 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 8 | These counters are at
a value different from zero | Make a note of/print out the screen showing the
failed engagement counters.Continue to Step 6 |
| 6 | SELF-CALIBRATION | All OK | Problems met | Operation |
|---|
| With
the Examiner Plus or Smart, in active diagnosis start end-of-line/Service
self-calibration | End of diagnosis | The self-calibration is
not successful | Continue according to the instructions for the diagnostic
equipment |
| 7 | 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 |
| 8 | 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 | Fault persists | Search for the
fault starting from another symptom' |
