939003574 - D014 ENGINE GOING OFF ON IDLING (THEN RESTARTING)

The customer complains of: The engine cuts out during operation, it can be restarted
Results of the tests
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Check that the engine oil level is correct    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly    See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECKCheck the condition of the fuel supply circuit and make sure that it is working properly    See Test 1040OA FUEL SUPPLY CIRCUIT CHECKAlso check. wiring on engine correctly fastened to earth;. battery correctly fastened to earth;. positive battery pole and all leads connected to it correctly fastenedMove on to Step 1Oil level incorrectRestore the correct engine oil level    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
Supply fastenings slack or oxidizedRestore correct fastenings    See E1010 POWER SUPPLY
Earth fastenings slack or oxidizedRestore correct fastenings    See E1010 POWER SUPPLY
1AMBIENT PARAMETERS CHECKAll OKProblems encounteredOperation
Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit.Check the value of the following parameters:. Battery voltage    See Test 5530BB BATTERY VOLTAGE CHECK. Engine coolant temperature    See Test 1060OE CHECK ON OPERATION OF COOLANT TEMPERATURE SENSOR. Diesel temperature    See Test 1060EA DIESEL FUEL TEMPERATURE CHECK. Objective Diesel pressure. Measured Diesel pressure    See Test 1060GH DIESEL FUEL PRESSURE CHECK. Engine rpm    See Test 1060GI ENGINE SPEED CHECKMove on to Step 2
2PARTICLE FILTRATION SYSTEM CHECKSAll OKProblems encounteredOperation
Check that the DPF system is working properly    See Test 1080BE PARTICULATE FILTER SATURATION CHECKMove on to Step 3
3ELECTRICAL EQUIPMENT CHECKAll OKProblems encounteredOperation
Check that fuse F1 has not blown (it is the last one at the bottom of the vertical row).
The check on the following system is only necessary if the outside temperature is below 0 °C.
Move on to Step 5Fuse F1 has blownRestore the connections or, if necessary, replace the junction unit in the engine compartment    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
4INJECTOR HIGH PRESSURE CHECKAll OKProblems encounteredOperation
Check, as instructed in the    See Test 1060OC INJECTORS SEAL TEST that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another.Move on to Step 5Significant leak from one injectorReplace the injector    Op. 1060F10 FUEL INJECTORS - R.R.
5HIGH PRESSURE CHECKAll OKProblems encounteredOperation
Check as described in the    See Test 1060OD INSPECTION OF THE HIGH PRESSURE FUEL CIRCUITthat the diesel pressure parameter is correct.Move on to Step 14Pressure not correctMove on to Step 6
6LOW RETURN PRESSURE CHECKAll OKProblems encounteredOperation
Check as described in the    See Test 1060OA CHECK ON RETURN LOW PRESSURE FUEL CIRCUITthat the pressure in the return pipe to the tank is less than 1 bar.Move on to Step 7Pressure above the maximum limit: return pipe to the tank obstructedRepair the pipe, if necessary, replace it
7LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Check as described in the    See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUITthat the diesel pressure between the filter and the pressure pump is between 2 and 3 bar.Move on to Step 13Pressure below the minimum limit or above the maximum limitMove on to Step 8
8LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Constrict the return pipe downstream of the valve and carry out the test once again    See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUITwith the pipe constricted, checking that the filter outlet pressure remains below 2 barMove on to Step 9Pressure rises to 5 bar: pressure regulator valve on filter mounting incorrectly adjustedReplace the valveSee Test 1044B16
9LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Check that the difference in pressure upstream and downstream of the filter is less than 1 barMove on to Step 10Difference in pressure more than 1 barReplace the fuel filter cartridgeOp. 1044B20
10LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Check that the supply pump pressure at the filter inlet is more than 2.2 barMove on to Step 13Pressure below 2,2 barMove on to Step 11
11LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.3 barMove on to Step 12Difference in pressure more than 0.3 barReplace the pipe
12LOW SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Check that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 AOp. 1040AA SUPPLY VOLTAGE AND ABSORPTION CURRENT CHECKSMove on to Step 13Voltage lower than 12 VRenew electrical wiring    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
Current greater than 10 A: pump defectiveReplace the fuel pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
Current less than 2 A: pump obstructedReplace the fuel pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank
13CHECK ON CORRECT OPERATIONAll OKProblems encounteredOperation
Replace the DRV high pressure regulating valve    Op. 1060E50 PRESSURE REGULATOR ON PRESSURE PUMP - R.R. and check that the fault is no longer present.End of diagnosisFault persistsMove on to Step 16
14CHECK ON CORRECT OPERATIONAll OKProblems encounteredOperation
Replace the engine management control unit    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R and check that the fault is no longer presentEnd of diagnosisFault persistsContact technical service for further information on the problem