125000472 - C09 THE GEARS DO NOT ENGAGE

When changing from 2nd-3rd it shift to 4th and when changing from 4th-3rd it shifts to 2nd with a sensation of slowness
If no errors are detected, the problem could be due to incorrect use of the vehicle by the customer. It is advisable to carry out a road test with the customer driving
Results of the tests
0OIL LEVEL CHECKAll OKProblems metOperation
Check the oil level as described in See Test    See Test 2127B OIL LEVEL CHECKContinue to Step 2Level below the Max referenceTop up the oil levelContinue to Step 1
Level above the Max referenceReduce to the Max levelContinue to Step 2
1CHECK FOR OIL LEAKSAll OKProblems metOperation
Check that there are no oil leaks as described in See Test    See Test 2127C HYDRAULIC GEAR SELECTION SYSTEMContinue to Step 2Oil leaks detectedReplace/repair the parts concerned, and top up the oil levelContinue to Step 1
2SLOW FINGER CHECKAll OKProblems metOperation
Using the Examiner Plus or Smart in active diagnosis, launch the procedure for checking the slow fingerContinue to Step 3The finger is slowReplace the finger fixing bolt
3PARAMETERS CHECK USING THE EXAMINERAll OKProblems metOperation
Check that the failed engagement counters in the parameters ambient (failed engagement counters from 1st to 5th) are all at zeroContinue to Step 6These counters are at a value different from zeroMake a note of/print out the screen showing the failed engagement countersContinue to Step 4
4SELF CALIBRATIONAll OKProblems metOperation
With the Examiner Plus or Smart, in active diagnosis start end-of-line Service self-calibrationContinue to Step 5The self-calibration is not successfulIntervene depending on the fault shown by the diagnostic equipment. After restoring the system, carry out the end of line service self-calibration procedure again.
5ROAD TESTAll OKProblems metOperation
Carry out a road test making sure to carry out as many gear changes as possible with all the available gears (under different engine rpm and load conditions).Check the failed engagement counters in the parameters environment (failed engagement counters from 1st-5th).
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 diagnosisThere is a significant increase for one or more countersContinue to Step 6
6THE FAULT PERSISTSAll OKProblems metOperation
The fault could be caused by false contacts at the gear lever or by the mechanical malfunction of the gearbox: in any case, make contact with the service department for further information about the problemEnd of diagnosis.