184000405 - B13 ENGINE STARTS WITH DIFFICULTY'
The engine, especially when cold, starts with difficulty only after repeated attempts. When the key is turned, the instruments light up as normal, the starter motor turns, but the engine has difficulty in starting.| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Check, in order:
| Continue to Step 1 | Air intake circuit component | Repair or replace the defective component | |
| Filter blocked | Replace the air filter Op. 1048A10 | |||
| Filter blocked | Replace the diesel filter cartridge Op. 1044B20 | |||
| Leaks from the diesel pipes | Retighten the pipes, and if necessary replace them. | |||
| Presence of water, petrol, paraffin or dirt detected | Clean the tank and pipes and replace the diesel filter cartridge Op. 1044B20 | |||
| Obstruction in the exhaust system | Replace the damaged system component | |||
| 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 | |
| unreliable parameters | Continue following the instructions for the diagnostic equipment | |||
| 2 | CHECK FLOW METER | All OK | Problems met | Operation |
| Check the condition of the flow meter and the pipes connected to it. | Continue to Step 3 | Pipes damaged | Repair the pipe; if necessary replace it | |
| 3 | EGR SOLENOID VALVE CHECK | All OK | Problems met | Operation |
| Check it is working properly. without sticking or intermediate stops. for the solenoid valve.(This can be done by removing the valve from its position and releasing it from the pipes, leaving the electrical connection, however, in place; at this point, operate the active diagnosis stage using the EXAMINER to check that it is working properly) | Continue to Step 4 | Solenoid valve damaged | Repair the solenoid valve and, if necessary, replace it Op. 1080C24 | |
| 4 | HIGH PRESSURE CHECK | All OK | Problems met | Operation |
| 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 12 | Pressure too high | Continue to Step 5 | |
| Pressure too low | Replace the pressure regulator Op. 1060E50 then continueContinue to Step 5 | |||
| 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 the 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 | |
| 7 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
| Close the return pipe downstream of the low pressure regulator valve, located in the fuel filter cover, using the special tool and carry out the test See Test 1060B Low fuel pressure supply circuit check again with the pipe closed, 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 diesel filter cover 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 diesel 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 bar | Continue to Step 10 | |
| 10 | LOW SUPPLY PRESSURE CHECK | 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 | 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 amps. | 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 | CORRECT OPERATION CHECK | All OK | Problems met | Operation |
| Replace the DRV high-pressure regulator and check that the fault is no longer present | End of diagnosis | Fault persists | Continue to Step 13 | |
| 13 | CORRECT OPERATION CHECK | All OK | Problems met | Operation |
| Replace the pressure pump and check that the fault is no longer present | End of diagnosis | Fault persists | Continue to Step 14 | |
| 14 | CHECK ON CYLINDER COMPRESSION | All OK | Problems met | Operation |
| Carry out the cylinder compression test | Continue to Step 16 | Cylinder compression insufficient | Continue to Step 15 | |
| 15 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems met | Operation |
| Carry out R.R. on head to check the valve sealCheck the condition of the cylinders/piston rings | Continue to Step 16 | Insufficient valve seal | Overhaul the cylinder head Op. 1016E10 | |
| Cylinders/piston rings worn | Repair the leak | |||
| 16 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists: control unit faulty | Replace engine management control unit Op. 1060G80 Search for the fault starting from another symptom' | |