3360191 - C17 THE VEHICLE JERKS

It shudders when setting off from a standstillIt shudders during a gear changePreliminary check: If the vehicle has faults in other systems (warning lights in instrument panel relating to: engine management, ABS, ESP, etc.) check the causes of these problems. If this is not the case, proceed with the following chart
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 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
2OIL PRESSURE CHECKAll OKProblems metOperation
Check the oil pressure See Test   2127D  OIL PRESSURE CHECK Continue to Step 4Pressure < 40 barContinue to Step 3
3CHECK THE OPERATION OF THE PUMPAll OKProblems metOperation
Check that the pump is working properly See Test   2127E  ELECTRIC PUMP OPERATION CHECK Continue to Step 4Voltage below 11 VCheck the batteryContinue to Step 3
It is not possible to make gear changes from the leverActivate the 'clutch bleed' service from the Examiner Plus or Smart to activate the pumpContinue to Step 3
4CONTROL UNIT ERRORS CHECKAll OKProblems metOperation

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

  • Clutch position sensor
  • CAN network errors
Continue to Step 7Presence of one or more of the errors included in the list Continue to Step 5
5CHECKS 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 (Clutch sensor)Repair/replace the wiringContinue to Step 6
There are no faulty connections (Clutch sensor)Replace the clutch actuator (CSC) and check its operation by carrying out a gear changeContinue to Step 6
One of the control units does not dialogue (CAN network errors)Repair/replace the control unit concernedContinue to Step 6
6AFTER THE CHECKS ON THE FAULTS DETECTEDAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 7
7BLEED THE SYSTEM USING THE EXAMINERAll OKProblems metOperation
In active diagnosis carry out two system bleeding cycles using the 'clutch bleed' commandContinue to Step 8-
8CARRY OUT CLUTCH PARAMETER CALIBRATION USING THE EXAMINERAll OKProblems metOperation
In active diagnosis carry out the calibration of the clutch parameters through the 'clutch self-calibration enablement' Continue to Step 9-
9ROAD TESTAll OKProblems metOperation
Carry out a road test to check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 10
10CHECK CLUTCH SENSOR WIRING LAYOUTAll OKProblems metOperation
Check the state of the connections, continuity of the wiring (it is important to pay particular attention to the layout of the clutch position sensor wiring in the engine compartment: the wire must not be too taut, and must have sufficient slack)Continue to Step 12A fault is detectedRepair/replace the part that is not workingContinue to Step 11
11CHECK THAT THE FAULT IS NO LONGER PRESENTAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 12
12FURTHER CHECKS ON OTHER SYSTEMSAll OKProblems metOperation
Check that the problem has not been caused by other systems such as the engine, fuel system, etc.Continue to Step 13There are faults on other vehicle systemsContinue in accordance with the appropriate diagnostic table
13THE FAULT PERSISTSAll OKProblems metOperation
Contact Technical Service for further information on the problemEnd of diagnosisFault persistsSearch for the fault starting from another symptom'