2751027 - D21 ENGINE CUTS OUT WHILST DRIVING

The engine cuts out suddenly whilst driving. Later, after starting normally, it works again
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Preliminarily check:

  • that the earth is correctly fixed on the engine
  • that the battery earth is correctly fixed
  • correct fixing of the positive battery terminal and the leads connected to it
  • for any obstructions in the catalyzer
  • that there is no water or other fluids in the fuel tank
Continue to Step 1Earth leads incorrectly fixedRenew or, if necessary, replace the battery earth lead Op. 5505A38
Battery positive earth incorrectly fixedRestore battery positive lead Op. 5530B26
Catalyzer obstructedReplace the catalyzer Op.   1080B62 
Presence of dirt in the fuel tankClean the fuel tank Op. 1040A24
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

check

  • that there are no faults in the engine management control unit;
  • the plausibility of all the parameters.
Continue to Step 2An error is detected in the control unitContinue following the instructions for the diagnostic equipment
Inconsistent parameterContinue following the instructions for the diagnostic equipment
2ROAD TEST WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Road test the vehicle, reproducing the conditions in which the fault arises, keeping the diagnostic equipment connected.

check

  • that there are no faults in the engine management control unit;
  • the plausibility of all the parameters.
Continue to Step 3Error arises suddenly in the control unitContinue following the instructions for the diagnostic equipment
Error arises suddenly in the control unitContinue following the instructions for the diagnostic equipment
Error arises suddenly in the control unitRestore the control unit circuit supply See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
3CHECK ON FUEL PRESSURE ON ROADAll OKProblems metOperation
Road test the vehicle and check the fuel supply pressure Op.   0510C10 
Make sure that the conditions in which the problem occurs are reproduced
Continue to Step 4Pressure not correct: obstructions in fuel delivery pipeRemove the obstructions in the fuel pipe, and if necessary replace it Op. 1040B30
Pressure not correct: obstructions in fuel delivery pipeRestsore the tank ventilation
Pressure not correct: obstructions in fuel delivery pipeRepair fuel pump electrical circuit See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
Pressure not correct: obstructions in fuel delivery pipeReplace fuel pump assembly Op.   1040A70 
4Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persists: control unit faultyReplace control unit Op.   1056B82