184000002 - B10 ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES
The engine does not start. When the key is turned, the instruments light up, the starter motor turns to the Avv position, but the engine will not start. | The MIL warning light should come on with the ignition on and go out once the engine has started;If the Code is faulty, the CODE system failure will be indicated by the instrument panel. |
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
| Turn the ignition on and check that the CODE is working properly Check:
| Continue to Step 1 | CODE fault message present | Continue as instructed in the Table See table K52 CODE FAILURE WARNING LIGHT ON | |
| Operation of inertia switch | Restore correct operation | |||
| No fuel | Put fuel in the tank | |||
| Air filter dirty or partly obstructed | Replace the filter element Op. 1048A14 | |||
| Incorrect operation of flow modulating valve | Continue to Step 1 | |||
| Exhaust blocked | Repair the exhaust pipes | |||
| There are leaks | Eliminate the leaks | |||
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check:
| Continue to Step 2 | An error is detected in the control unit | Continue following the instructions for the diagnostic equipment | |
| Solenoid not working | Check the continuity of the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT and if necessary replace the solenoid Op. 1060G56 | |||
| 2 | CHECK ON FLOW MODULATING VALVE ACTUATOR | All OK | Problems met | Operation |
| Check operation of pneumatic actuator | Continue to Step 3 | Actuator not working | Replace electropneumatically-controlled throttle body Op. 1060G52 | |
| 3 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socketCheck as described in the test See Test 1060D Check high pressure fuel circuit that the diesel pressure parameter is correct. | Continue to Step 14 | Pressure not correct | Continue to Step 4 | |
| 4 | INJECTOR HIGH PRESSURE CHECK | All OK | Problems met | Operation |
| Check, as described in the test See Test 1060C Injector high pressure fuel circuit check , that diesel leaks from the injector recirculation connections are small and about the same as one another. | Continue to Step 5 | Large leak from one injector | Replace the injector Op. 1060F10 | |
| Consistent fall in pressure | Replace the pressure regulator Op. 1060E50 | |||
| 5 | CHECK ON RETURN LOW PRESSURE | All OK | Problems met | Operation |
| Check as described in the test See Test 1060A Low return fuel pressure circuit check that the pressure in the return pipe to the tank is under 1 bar | Continue to Step 6 | Pressure above maximum limit: return pipe to tank blocked | Repair the pipe; if necessary replace it | |
| 6 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
| Check as described in the test See Test 1060B Low fuel pressure supply circuit check that the diesel pressure between filter and pressure pump is between 2 and 3 bar | Continue to Step 12 | Pressure below minimum limit or above maximum limit | Continue to Step 12 | |
| 7 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
| Choke the return pipe below the valve and repeat the test See Test 1060B Low fuel pressure supply circuit check with the pipe choked, checking that the filter outlet pressure remains below 2 bar | Continue to Step 8 | Pressure rises to 5 bar: blocked pressure regulation valve on filter support | Replace the valve Op. 1044B16 | |
| 8 | LOW SUPPLY PRESSURE CHECK | 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 greater than 1 bar | Replace the fuel filter cartridge Op. 1044B20 | |
| 9 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
| Check that the supply pump pressure at the filter inlet is over 2.2 bar | Continue to Step 12 | Pressure below 2.2 bar | Continue to Step 10 | |
| 10 | CHECK DELIVERY LOW PRESSURE | All OK | Problems met | Operation |
| Measure the difference in pressure between electric pump outlet and filter inlet and check that it is less than 0.3 bar | Continue to Step 11 | Difference in pressure greater than 0.3 bar | Replace the pipe | |
| 11 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
| Check as described in the test See Test 1040AA Check supply voltage' and absorption current' that the pump's supply voltage is 12V and that the absorbed current is between 2 and 10 amp. | Continue to Step 12 | Voltage < 12 V | Check electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |
| Current > 10 Amp: pump defective | Replace the fuel pump assembly Op. 1040A70 | |||
| Current < 2 Amp.: pump blocked | Replace the fuel pump assembly Op. 1040A70 and clean the fuel tank | |||
| 12 | Continue as instructed by the tester | All OK | Problems met | Operation |
| Replace the DRV high-pressure regulating valve and check that the fault is no longer present. | End of diagnosis | Fault persists: | Continue to Step 13 | |
| 13 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Replace the pressure pump and check that the fault is no longer present | End of diagnosis | Fault persists | Contact Technical Service for further information on the problem | |
| 14 | Continue as instructed by the tester | All OK | Problems met | Operation |
| Replace the engine management control unit and check that the fault is no longer present | End of diagnosis | Fault persists | Contact Technical Service for further information on the problem | |