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 | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
First check:
| Continue to Step 1 | No fuel | Introduce fuel | |
| Fastenings slack or oxidized | Re-attach correctly | |||
| Presence of water in the fuel filter | Clean the tank and pipes and replace the filter element | |||
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socket. Verify:
| Continue to Step 2 | Error detected in the control unit | Continue following the instructions for the diagnostic equipment | |
| 2 | ROAD TEST WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Road
test the vehicle, reproducing the conditions in which the fault
arises, keeping the diagnostic equipment connected. Verify:
| Continue to Step 3 | Error detected in the control unit | Continue following the instructions for the diagnostic equipment | |
| 3 | INJECTOR HIGH PRESSURE CHECK | All OK | Problems met | Operation |
| Check that the diesel leaks from the injector recirculation connections are small and about the same as one another See Test 1060C Injector high pressure fuel circuit check . | Continue to Step 4 | Persistent leak from one injector | Replace the injector | |
| 4 | HIGH PRESSURE CHECK | All OK | Problems met | Operation |
| Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that the diesel pressure parameter is correct. See Test 1060D Check high pressure fuel circuit | Continue to Step 12 | Pressure not correct | Continue to Step 5 | |
| 5 | CHECK RETURN LOW PRESSURE | All OK | Problems met | Operation |
| Check that the pressure in the return pipe to the tank is less than 1 bar See Test 1060A Low return fuel pressure circuit check | Continue to Step 6 | Pressure above maximum limit: return pipe to tank blocked | Repair the pipe; if necessary replace it | |
| 6 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Check that the diesel pressure between filter and pressure pump is between 2 and 3 bar See Test 1060B Low fuel pressure supply circuit check | Continue to Step 12 | Pressure below minimum limit or above maximum limit | Continue to Step 7 | |
| 7 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Choke the return pipe from the pressure regulating valve and repeat the test See Test 1060B Low fuel pressure supply circuit check with the pipe choked, checking that the pressure at the filter outlet is below 2 bar | Continue to Step 8 | Pressure rises to 5 bar: pressure regulating valve on filter mounting out of adjustment | Replace the valve Op. 1044B16 | |
| 8 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Check that the difference in pressure upstream and downstream of the filter is less than 1 bar | Continue to Step 9 | Difference in pressure over 1 bar | Replace the diesel filter cartridge Op. 1044B20 | |
| 9 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Check that the pressure of the supply pump at the filter inlet is over 2.2 bar | Continue to Step 12 | Pressure below 2.2 bar | Continue to Step 10 | |
| 10 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Measure the difference in pressure between electric pump outlet and filter inlet, checking that it is less than 0.3 bar | Continue to Step 11 | Pressure difference greater than 0.3 bar | Replace the pipe | |
| 11 | CHECK ON DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Check that the pump supply voltage is 12 V and that the absorbed current is between 2 and 10 amp. See Test 1040AA Check supply voltage and absorption current | Continue to Step 12 | Voltage < 12 V | Check electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |
| Current > 10 amp: pump faulty | Replace fuel pump assembly Op. 1040A70 | |||
| Current < 2 Amp.: pump blocked | Replace fuel pump assembly Op. 1040A70 and clean the fuel tank | |||
| 12 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Replace the DRV high-pressure valve and check that the fault is no longer present | Fault persists | Continue to Step 13 | ||
| 13 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Replace the pressure pump and check that the fault is no longer present | Fault persists | Contact Technical Service for further information on the problemSearch for the fault starting from another symptom' | ||