| | Results
of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Turn
the ignition on and check that the CODE is working properly  | The I.E light should come on for
about 4 seconds and then switch off, while the CODE light should
come on for about 1 second and then switch off. |
Then check: - that the inertia switch has not been operated;
- that there is fuel in the tank
- that the air filter and air intake circuit are working
properly
- 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 1 | CODE fault message present | Continue according to the
instructionsSee table K52 |
| Operation of inertia switch | Restore correct operation |
| No fuel | Put fuel in the tank |
| Air filter dirty or partly obstructed | Replace the filter element Op. 1048A14 |
| Exhaust blocked | Repair the exhaust pipes |
| There are leaks | Eliminate the leaks |
| Presence of water, petrol, paraffin or dirt detected | Clean the tank and pipes and replace the diesel filter
cartridge Op. 1044B20 |
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Connect
the Examiner diagnostic equipment to the diagnostic socket. Check: - for errors in the control unit
| Continue to Step 2 | For the presence of one
of the following errors: P0262, P0265, P0268, P0271 | Continue to Step 8 |
| Presence of error P0093 | Continue to Step 6 |
| Simultaneous presence of errors P1191 and P1197 | Continue to Step 9 |
| Simultaneous presence of errors P1194 and P1197 | Continue to Step 9 |
| Presence of error P1191 | Continue to Step 7 |
| Presence of one of the following errors: P1193, P1195
P1196 | Continue to Step 7 |
| Presence of error P0335 | Continue to Step 3 |
| Presence of error P0340 | Continue to Step 4 |
| Presence of error P005 and/or P0230 | Check the condition of the wiring for the electric fuel
pump (in particular the operating relay), if necessary, restore
correct operation |
| Presence of error P0090 | Check the condition of the wiring for the fuel pressure
regulator, if necessary, restore correct operation |
| Presence of error P1194 | Continue to Step 7 |
| Presence of error P0683 and/or P0380 | Continue to Step 5 |
| Presence of other errors | Continue according to the instructions for the diagnostic
equipment |
| 2 | CHECK ON FLOW MODULATING VALVE
ACTUATOR | All
OK | Problems
met | Operation |
|---|
| Check: - No mechanical problems keeping the valve closed
- Pneumatic actuator operation
- Solenoid valve wiring
- Plausibility of status parameter using diagnostic equipment
| Continue to Step 3 | Mechanical problems | Restore correct operation |
| Actuator not working | Replace electropneumatically-controlled throttle body
Op. 1060G52 |
| Wiring faulty | Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 3 | RPM SENSOR CHECK | All OK | Problems met | Operation |
|---|
| Check
the operation of the rpm sensor carrying out See Test 1060GA Check on efficiency of rpm sensor and checking the condition
of the wiring | Continue to Step 4 | Sensor faulty | Replace sensor. |
| Wiring faulty | Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 4 | TIMING SENSOR CHECK | All OK | Problems met | Operation |
|---|
| 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 wiring | Continue to Step 5 | Sensor faulty | Replace sensor. |
| Wiring faulty | Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 5 | PRE-HEATING SYSTEM CHECK | All OK | Problems met | Operation |
|---|
| Check
the condition of the wiring and the operation of the pre-heating
system (heater plugs) | Continue to Step 6 | Wiring faulty | Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| Heater plugs faulty | Replace damaged heater plugs |
| 6 | HIGH RESSURE CIRCUIT CHECK | All OK | Problems met | Operation |
|---|
| 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 7 | There are leaks | Eliminate leaks from the
system |
| 7 | HIGH PRESSURE CHECK | All OK | Problems met | Operation |
|---|
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socketCheck as described in the See Test 1060D Check high pressure fuel circuit that the diesel pressure parameter is correct;Check the operation of the high pressure sensor on the rail carrying
out See Test 1060GE Check on operation of diesel high pressure sensor The operation of the pressure regulator through active diagnosis. | Continue to Step 8 | Sensor faulty | Replace sensor. |
| Pressure regulator faulty | Replace the pressure regulator |
| Pressure not correct | Continue to Step 9 |
| 8 | INJECTOR HIGH PRESSURE CHECK | All OK | Problems met | Operation |
|---|
| Check,
as described in the test See Test 1060C Injector high pressure fuel circuit check | Continue to Step 9 | Consistent leak from one
injector | Replace
the injector |
| 9 | 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 10 | Pressure above maximum
limit: return pipe to tank blocked | Repair the pipe; if necessary replace it |
| 10 | 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 filter and pressure
pump is between 2 and 3 bar | Continue to Step 16 | Pressure below minimum
limit or above maximum limit | Continue to Step 11 |
| 11 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
|---|
| 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 bar | Continue to Step 12 | Pressure rises to 5 bar:
blocked pressure regulation valve on filter support | Replace the valve Op. 1044B16 |
| 12 | 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 13 | Difference in pressure
greater than 1 bar | Replace the fuel filter cartridge Op. 1044B20 |
| 13 | 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 16 | Pressure below 2.2 bar | Continue to Step 14 |
| 14 | LOW SUPPLY PRESSURE CHECK | All OK | Problems met | Operation |
|---|
| 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 15 | Difference in pressure
greater than 0.3 bar | Replace the pipe |
| 15 | 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 13V
and that the absorbed current is less than or equal to 4.6 amps | Continue to Step 16 | Voltage below 12 V | Check electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| Current greater than 4.6 amps: pump faulty | Replace the fuel pump assembly Op. 1040A70 |
| 16 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
|