3233003 - 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 there is a fault in the reconfigurable matrix the CODE failure message comes on.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Turn the ignition on and check that the CODE is working properly

Check:

  • that the inertia switch has not cut in;
  • that there is fuel in the tank
  • air intake circuit;
  • correct operation of the flow modulating valve;
  • correct operation of the exhaust pipes.
  • that there are no leaks from the high- and low-pressure fuel pipes
Continue to Step 1 CODE fault message present See table   K52  CODE FAILURE WARNING LIGHT ON
Operation of inertia switchRestore correct operation
No fuelPut fuel in the tank
Air filter dirty or partly obstructed Replace the filter element Op.   1048A14 
Incorrect operation of flow modulating valveReplace the filter element Continue to Step 1
Exhaust blockedRepair the exhaust pipes
There are leaksEliminate the leaks
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment to the diagnostic socket

Check:

  • that there are no errors in the control unit
Carry out active diagnosis of flow modulating solenoid
Continue to Step 2 An error is detected in the control unitContinue 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
2CHECK ON FLOW MODULATING VALVE ACTUATORAll OKProblems metOperation
Check operation of pneumatic actuator Continue to Step 3 Actuator not working Replace electropneumatically-controlled throttle body Op.   1060G52 
3HIGH PRESSURE CHECKAll OKProblems metOperation
Connect the diagnostic equipment to the diagnostic socket. Check 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
4INJECTOR HIGH PRESSURE CHECKAll OKProblems metOperation
Check, as described in the test See Test   1060C  Check high pressure fuel circuit , that diesel leaks from the injector recirculation connections are small and about the same as one another. Continue to Step 5 Consistent leak from one injectorReplace the injector
5CHECK ON RETURN LOW PRESSUREAll OKProblems metOperation
Check as described in the test See Test   1060A  Check low pressure fuel circuit 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 blockedRepair the pipe; if necessary replace it
6LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
Check as described the test See Test   1060B  Check low pressure fuel circuit 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 7
7LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
Choke the return pipe below the valve and repeat the test See Test   1060B  Check low pressure fuel circuit 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 
8LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
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 
9CHECK DELIVERY LOW PRESSUREAll OKProblems metOperation
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
10LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
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 barReplace the pipe
11LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
Check as described in test 1040AA 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
12CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Replace the DRV high-pressure regulating valve and check that the fault is no longer present.End of diagnosisFault persists: Continue to Step 13
13CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Replace the pressure pump and check that the fault is no longer presentEnd of diagnosisFault persists: Contact Technical Service for further information on the problem
14CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Replace the engine management control unit and check that the fault is no longer presentEnd of diagnosisFault persists: Contact Technical Service for further information on the problem