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
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 exhaust pipes;
  • that there are no leaks from the high- and low-pressure fuel pipes;
  • that there is no petrol, water, paraffin or dirt in the diesel filter
Continue to Step 1CODE fault message presentCoolant leaks detectedSee table K52
Operation of inertia switchRestore correct operation
No fuelPut fuel in the tank
Air filter dirty or partly obstructedReplace the filter element Op. 1048A14
Exhaust blockedRepair the exhaust pipes
There are leaksEliminate the leaks
Presence of water, petrol, paraffin or dirt detectedClean the tank and pipes and replace the diesel filter cartridge Op. 1044B20
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner diagnostic equipment to the diagnostic socket.Check that there are no errors in the control unitContinue to Step 2Presence of one of the following errors: P0262, P0265, P0268, P0271Continue to Step 8
Presence of error P0093Continue to Step 6
Simultaneous presence of errors P1191 and P1197Continue to Step 9
Simultaneous presence of errors P1194 and P1197Continue to Step 9
Presence of error P1191Continue to Step 7
Presence of one of the following errors: P1193, P1195, P1196Continue to Step 7
Presence of error P0335Continue to Step 3
Presence of error P0340Continue to Step 4
Presence of error P005 and/or P0230Check the condition of the wiring for the electric fuel pump (in particular the operating relay), if necessary, restore correct operation
Presence of error P0090Check the condition of the wiring for the fuel pressure regulator, if necessary, restore correct operation
Presence of error P1194Continue to Step 7
Presence of error P0683 and/or P0380Continue to Step 5
Presence of other errorsContinue according to the instructions for the diagnostic equipment
2CHECK ON FLOW MODULATING VALVE ACTUATORAll OKProblems metOperation

check

  • No mechanical problems keeping the valve closed
  • pneumatic actuator operation
  • Solenoid valve wiring
  • Plausibility of status parameter using diagnostic equipment
Continue to Step 3Mechanical problemsRestore correct operation
Actuator not workingReplace electropneumatically-controlled throttle body Op. 1060G52
Wiring faultyRenew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
3RPM SENSOR CHECKAll OKProblems metOperation
Check the operation of the timing sensor and carry out Test 1060GA and check the condition of the wiringContinue to Step 4Sensor faultyReplace sensor
Wiring faultyRenew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
4TIMING SENSOR CHECKAll OKProblems metOperation
Check the operation of the timing sensor and carry out the test See Test 1060GC Check on operation of timing sensor and check the condition of the wiringContinue to Step 5Sensor faultyReplace sensor
Wiring faultyRenew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
5PRE-HEATING SYSTEM CHECKAll OKProblems metOperation
Check the condition of the wiring and the operation of the pre-heating system (heater plugs)Continue to Step 6Wiring faultyRenew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
Heater plugs faultyReplace damaged heater plugs
6HIGH RESSURE CIRCUIT CHECKAll OKProblems metOperation
Check the condition of and that there are no leaks from the rail, the radial jet pump, the injector pipes and all the high pressure lines.Continue to Step 7There are leaksEliminate leaks from the system
7HIGH PRESSURE CHECKAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) 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;
  • the operation of the rail high pressure sensor by carrying out the test See Test 1060GE Check on operation of diesel high pressure sensor
  • the operation of the pressure regulator through active diagnosis.
Continue to Step 8Sensor faultyReplace sensor
Pressure regulator faultyReplace the pressure regulator
Pressure not correctContinue to Step 9
8INJECTOR HIGH PRESSURE CHECKAll OKProblems metOperation
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 8Large leak from one injectorReplace the injector Op. 1060F10
9CHECK ON RETURN LOW PRESSUREAll OKProblems metOperation
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 barContinue to Step 10Pressure above maximum limit: return pipe to tank blockedRepair the pipe; if necessary replace it
10INJECTOR HIGH PRESSURE CHECKAll OKProblems metOperation
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 barContinue to Step 16Pressure below minimum limit or above maximum limitContinue to Step 11
11LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
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 barContinue to Step 12Pressure rises to 5 bar: blocked pressure regulation valve on filter supportReplace the valve Op. 1044B16
12LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
Check that the difference in pressure upstream and downstream of the filter is less than 1 barContinue to Step 13Difference in pressure greater than 1 barReplace the fuel filter cartridge Op. 1044B20
13CHECK DELIVERY LOW PRESSUREAll OKProblems metOperation
Check that the supply pump pressure at the filter inlet is over 2.2 barContinue to Step 16Pressure below 2.2 barContinue to Step 14
14LOW 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 barContinue to Step 15Difference in pressure greater than 0.3 barReplace the pipe
15LOW SUPPLY PRESSURE CHECKAll OKProblems metOperation
Check as described in the test See Test 1040AA Check supply voltage' and absorption current' that the pump's supply voltage is 13V and that the absorbed current is less than or equal to 4.6 ampsContinue to Step 16Voltage below 12 VCheck electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
Current greater than 4.6 amps: pump faultyReplace the fuel pump assembly Op. 1040A70
16CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Replace the high-pressure regulating valve and check that the fault is no longer present.End of diagnosisFault persists:Continue to Step 17
17Continue as instructed by the testerAll OKProblems metOperation
Replace the pressure pump and check that the fault is no longer presentEnd of diagnosisFault persistsContact Technical Service for further information on the problem
18Continue as instructed by the testerAll OKProblems metOperation
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