125000490 - C28 THE ENGINE HAS CUT OUT

Whilst the vehicle is stopping Whilst the vehicle is setting off With vehicle stationary
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
2OIL PRESSURE CHECKAll OKProblems metOperation
Check the oil pressure as described in See Test    See Test 2127D OIL PRESSURE CHECKContinue to Step 4Pressure < 40 barContinue to Step 3
3ELECTRIC PUMP OPERATION CHECKAll OKProblems metOperation
Check the correct operation of the pump as described in See Test    See Test 2127E ELECTRIC SPEED SELECTION SYSTEMContinue 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 4
4CONTROL UNIT ERRORS CHECKAll OKProblems metOperation

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

  • Clutch sensor error
  • Clutch solenoid current error
  • Load relay error
  • Odd gear engagement (short circuit to Vbatt)
Even gear engagement (short circuit to Vbatt)
In the presence of these errors, for safety reasons (at speeds below 5 km/h) the Robotized Gearbox control unit could request the injection control unit to switch off the engine; it is therefore advisable to carry out an engine management fault diagnosis.
Continue to Step 9Presence of one or more of the errors included in the listContinue to Step 5
5CHECKS ON FAULTS DETECTEDAll OKProblems metOperation
Check the faults in accordance with See Test    See Test 2127I What to do for error in Selespeed control unitContinue to Step 7Faulty connectionsRepair/replace the wiringContinue to Step 7
The active diganosis is not successful and there are no faults detected at the wiring (Clutch solenoid valve and/or Even or odd gear engagement)Continue to Step 6
Battery run down (Load relay error)Restore the correct battery charge Op. 5530C14Continue to Step 5
6AFTER THE SOLENOID VALVE ACTIVE DIAGNOSISAll OKProblems metOperation
If this step has been reached for the active diagnosis of the clutch solenoid valve, replace it Op. 2127C56and check its operation by carrying out a C.M.If this step has been reached for the active diagnosis of the engagement solenoid valve, replace it Op. 2127C52and check its operationContinue to Step 7.
7POTENTIOMETER REPLACEMENTAll OKProblems metOperation
If there is a clutch sensor error and no faults are detected at the connections/wiring, replace the clutch potentiometer Op. 2127E44and check that the position reading is correct by carrying out a series of C.M.Continue to Step 8.
8AFTER THE CHECKS ON THE FAULTS DETECTEDAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 9
9CHECK THAT THE CLUTCH IS NOT DRAGGINGAll OKProblems metOperation
Check that the clutch is not dragging following See Test    See Test 2127K CLUTCH DRIVE CHECKContinue to Step 10The clutch dragsProceed with checking the clutch/flywheel kit and, if necessary, replace any components that do not conform.
10CHECK THAT THERE ARE NO ERRORS ON OTHER SYSTEMSAll OKProblems metOperation
Check that there are no errors or any problems in other vehicle systemsContinue to Step 11There are faults detectedContinue in accordance with the instructions for the diagnostic equipment
11THE FAULT PERSISTSAll OKProblems metOperation
Contact Technical Service for further information on the problemEnd of diagnosis.