3360210 - 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

First check:

  • that the earth is correctly fastened on the engnie; See   E1020  EARTHS
  • that the positive battery terminal and the cables connected to it are correctly fastened; See   E1010  SUPPLY
  • no water in the fuel filter
Continue to Step 1Earth lead incorrectly fastenedRenew or, if necessary, replace the battery earth lead Op. 5530B22
Battery postive incorrectly fastenedRestore battery positive lead Op. 5530B26
Presence of water in the fuel Replace the fuel
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Verify:

  • that there are no faults in the engine management control unit
  • the plausibility of all the parameters.
Continue to Step 2Error detected in the control unitContinue following the instructions for the diagnostic equipment
Incoherent 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.

Verify:

  • 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 according to the instructions for the diagnostic equipment
Incoherent parameterContinue according to the instructions for the diagnostic equipment
Loss of communication between the control unit and diagnostic instrumentRestore the control unit circuit supply See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
3FUEL PRESSURE ROAD TESTAll 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 4 Pressure not correct: obstructions in the pipe Remove the obstructions in the fuel pipe, and if necessary replace it
Pressure incorrect: fuel pump damagedReplace fuel pump assembly Op.   1040A70 
4CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persists: control unit defectiveReplace control unit Op.   1056B82  Search for the fault starting from another symptom'