Check that the engine oil level is correct

Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY

Check that the air intake/vacuum circuit is working properly by carrying out the

See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK

Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the

See Test 1040OA FUEL SUPPLY CIRCUIT CHECK

Also check:

. wiring on engine correctly fastened to earth;

. battery correctly fastened to earth;

. positive battery pole and all leads connected to it correctly fastened

Restore the correct engine oil level

Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY

Restore correct fastenings

See E1010 POWER SUPPLY

Restore correct fastenings

See E1010 POWER SUPPLY

Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit.

Check the value of the following parameters:

. Battery voltage

See Test 5530BB BATTERY VOLTAGE CHECK

. Engine rpm

See Test 1060GI ENGINE SPEED CHECK

Check that the DPF system is working properly, carrying out the

See Test 1080BE PARTICULATE FILTER SATURATION CHECK

Check that the fuses F1 (the last one at the bottom of the vertical row) and F20 (the first one on the right of the lower row) have not blown.

The check on the following system is only necessary if the outside temperature is below 0 °C.

Restore the connections or, if necessary, replace the junction unit in the engine compartment

Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.

Check the circuit for the protective fuse for the diesel preheating relay, carrying out the

See Test 5505AB CHECK DIESEL PREHEATING RELAY PROTECTIVE FUSE

Check the diesel preheating relay circuit, carrying out the

See Test 5505AC CHECK DIESEL PREHEATING RELAY

Check as described in the

See Test 1060OC INJECTORS SEAL TEST

that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another.

Replace the injector

Op. 1060F10 FUEL INJECTORS - R.R.

Check as described in the

See Test 1060OD INSPECTION OF THE HIGH PRESSURE FUEL CIRCUIT

that the diesel pressure parameter is correct.

Check as described in the

See Test 1060OA CHECK ON RETURN LOW PRESSURE FUEL CIRCUIT

that the pressure in the return pipe to the tank is less than 1 bar.

Check as described in the

See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT

that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar

Constrict the return pipe downstream of the valve and carry out the test once again

See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT

with the pipe constricted checking that the filter outlet pressure remains below 2 bar

Replace the valve

Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE

Replace the fuel filter cartridge

Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE

Check as described in the

See Test 1040AA SUPPLY VOLTAGE AND ABSORPTION CURRENT CHECKS

that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A

Renew electrical wiring

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

Replace the fuel pump

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

Replace the fuel pump

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

and clean the fuel tank

Replace the DRV high pressure regulating valve

Op. 1060E50 PRESSURE REGULATOR ON PRESSURE PUMP - R.R.

and check that the fault is no longer present.

Replace the engine management control unit

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R

and check that the fault is no longer present

First, check:

• correct earth fastening on engine;
• correct battery earth fastening;
• positive battery pole and all leads connected to it correctly fastened;
• possible catalytic converter obstruction
• that there is no water or other liquids in the fuel tank

Restore or, if necessary, replace the battery earth lead Op.

Op. 5530B22 BATTERY EARTH LEAD - R+R

Restore the positive battery lead Op.

Op. 5530B26 LEAD BETWEEN BATTERY AND STARTER MOTOR - R+R

Replace the exhaust manifold Op.

Op. 1072C16 EXHAUST MANIFOLD WITH CATALYTIC CONVERTER - R.R.

Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.

Check:

• that there are no faults in the engine management control unit;
• parameter plausibility

Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.

Check:

• that there are no faults in the engine management control unit;
• parameter plausibility

Restore the control unit circuit supply See

See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

Carry out a road test and check the fuel supply pressure Op.

Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE

Make sure that the conditions in which the problem occurs are reproduced

Remove the obstructions in the fuel pipe, replace it if necessary Op.

Op. 1040B32 FRONT FUEL DELIVERY LINE - R.R.

Restore fuel pump electric circuit See

See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

Replace the petrol pump assembly Op.

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

Replace the control unit Op.

Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

Search for the fault starting from another symptom