125000463 - B10 ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES

Results of the tests
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Turn the key ON and check that the initial check on the I.E. and CODE warning lights takes place.
The I.E. warning light should come on for about 4 seconds and then go out, whilst the CODE warning light should come on for around 1 second and then go out

Then check:

  • that the inertia switch has not been operated;
  • status of spark plugs and leads;
  • no obstructions in the catalytic converter;
  • no water in the fuel
Move on to Step 1The I.E. warning light stays onContinue following the instructions in the table    See table K50 I.E. FAILURE WARNING LIGHT ON
Both warning lights remain onContinue following the instructions in the table    See table K51 I.E. WARNING AND CODE WARNING LIGHT BOTH ON / ENGINE DOES NOT START
The CODE waring light stays onContinue following the instructions in the table    See table K52 CODE FAILURE WARNING LIGHT ON
The I.E. warning light does not carry out the intial testContinue following the instructions in the table    See table K53 I.E. FAILURE WARNING LIGHT OFF / (DO NOT CARRY OUT INITIAL TEST)
The CODE warning light does not carry out the intial testContinue following the instructions in the table    See table K54 CODE WARNING LIGHT OFF (INITIAL TEST NOT CARRIED OUT)
The warning lights do not carry out the initial testContinue following the instructions in the table    See table K49 I.E. FAILURE WARNING LIGHT AND CODE WARNING LIGHT BOTH OFF / ENGINE DOES NOT START
Intertia switch operatedRestore correct operation
Spark plugs dirty or wornReplace the spark plugs    Op. 5510D10 SPARK PLUGS - R+R
Spark plug leads damagedReplace the leads
Catalyzer(s) blockedReplace catalyzer(s)
Water in fuelClean the tank
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Check:

  • that there are no errors in the control unit;
  • parameter plausibility
Move on to Step 2Error detected in the control unitContinue following the instructions for the diagnostic equipment
Parameters not plausibleContinue following the instructions for the diagnostic equipment
2RPM SIGNAL CHECKAll OKProblems encounteredOperation
During starting, check for the correct rpm signal by carrying out Test 5510CF    See Test 5510 ENGINE IGNITIONMove on to Step 3RPM sensor defectiveChange rpm sensor
Rpm sensor wiring brokenRestore wiring
3FUEL PUMP ACTIVATE DIAGNOSISAll OKProblems encounteredOperation
Carry out the active diagnosis of the fuel pump and check that it is working properlyMove on to Step 4Pump not workingMove on to Step 5
4PETROL PUMP ELECTRIC CIRCUIT CHECKAll OKProblems encounteredOperation
Check the petrol pump power supply and earth by carrying out Test 1040AB    See Test 1040 FUEL TANK AND PIPESMove on to Step 5Connections not correctRepair the connections    See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
Pump faultyReplace the petrol pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R
5SUPPLY PRESSURE CHECKAll OKProblems encounteredOperation
Check that the fuel supply pressure is correct by carrying out Test 1056BY    See Test 1056 PETROL INJECTION SYSTEMMove on to Step 6Pressure not correctEliminate any obstruction in the supply pipe. If necessary, replace the pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R
6CHECK ON CORRECT OPERATIONAll OKProblems encounteredOperation
Check that the fault is no longer presentEnd of diagnosisFault persists: control unit defectiveReplace the control unit Op. 1056B82 CENTRALINA (UNICA) DELL''IMPIANTO INIEZIONE/ACCENSIONE - S.R.