3360188 - C14 THE GEARS DO NOT ENGAGE

It skips a gear/the requested gear is not engaged.
If no errors are detected, the problem could be due to incorrect use of the vehicle by the customer.
Results of the tests
0OIL LEVEL CHECKAll OKProblems metOperation
Check the oil level See Test   2127B  OIL LEVEL CHECK Continue to Step 2Level below Max referenceTop up the oil levelContinue to Step 1
Level above Max referenceReduce to Max levelContinue to Step 2
1CHECK FOR OIL LEAKSAll OKProblems metOperation
Check that there are no oil leaks See Test   2127C  CHECK FOR FLUID LEAKS Continue to Step 2Oil leaks detectedReplace/repair the relevant parts, top up the oil levelContinue to Step 1
2CONTROL UNIT ERRORS CHECKAll OKProblems metOperation

Check that there are no control unit errors. In particular:

  • Engagement sensor error
  • Selection sensor error
Continue to Step 5Presence of one or more of the errors included in the list Continue to Step 3
3CHECKS ON FAULTS DETECTEDAll OKProblems metOperation
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 diagnosisFaulty 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
4AFTER THE CHECKS ON THE FAULTS DETECTEDAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 5
5PARAMETERS CHECK USING THE EXAMINERAll OKProblems metOperation
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 8These counters are at a value different from zeroMake a note of/print out the screen showing the failed engagement counters.Continue to Step 6
6SELF-CALIBRATIONAll OKProblems metOperation
With the Examiner Plus or Smart, in active diagnosis start end-of-line/Service self-calibrationEnd of diagnosisThe self-calibration is not successfulContinue according to the instructions for the diagnostic equipment
7ROAD TESTAll OKProblems metOperation
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 countersEnd of diagnosisThere is a significant increase for one or more countersReplace the gearbox Op.   2110A11 
8THE FAULT PERSISTSAll OKProblems metOperation
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 diagnosisFault persistsSearch for the fault starting from another symptom'