| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|
| Check that the air intake/vacuum circuit is working properly. Also check: - Wiring on engine correctly fastened to earth;
- Battery correctly fastened to earth;
- Positive battery pole and all leads connected to it are correctly fastened
- Fuel Cut Off intervention
- Presence of fuel in the tank
- Air filter blocked
- Fuel filter blocked
| Move on to Step 1 | 1. Supply fastenings slack or oxidized2. Earth fastenings slack or oxidized3. Inertia switch operated4. Lack of fuel in the tank5. Air filter blocked6. Fuel filter blocked | 1. Restore correct fastenings See E1010 POWER SUPPLY 2. Restore correct fastenings See E1010 POWER SUPPLY 3. Carry out theSee Test 4. Refill with fuel5. Replace the air filter Op. 1048A10 AIR FILTER ASSEMBLY - R.R. 6. Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE |
| 1 | CHECK USING THE EXAMINER | All OK | Problems encountered | Operation |
|---|
| Connect to the engine control unit and check that there are no errors | Move on to Step 2 | Presence of errors | Continue as instructed by the diagnostic equipment. |
| 2 | ENGINE CONTROL UNIT POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the engine control unit is receiving the correct power supplyCheck that the main relay is working correctly See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | Move on to Step 3 | 1. Engine control unit power supply not correct2. Main relay defective | 1. Restore the control unit power supply2. Replace main relay |
| 3 | TIMING SENSOR CHECK | All OK | Problems encountered | Operation |
|---|
| Check the operation of the timing sensor, by carrying out the See Test 1060GC TIMING SENSOR OPERATION CHECK Check the wiring continuity See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | Move on to Step 4 | 1. Sensor faulty2. Wiring faulty | 1. Replace timing sensor Op. 1060G22 CAM ANGLE SENSOR - R.R 2. Restore correct wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 4 | RPM SENSOR CHECK | All OK | Problems encountered | Operation |
|---|
| Check the operation of the rpm sensor, by carrying out the See Test 1060GI ENGINE SPEED CHECKCheck the wiring continuity | Move on to Step 5 | 1. Sensor faulty2. Wiring faulty3. Phonic wheel damaged | 1. Replace the rpm sensor Op. 1060G20 ENGINE RPM SENSOR - R.R. 2. Restore correct wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT 3. Replace the phonic wheel and reset the parameters in the control unit using the Examiner |
| 5 | INJECTOR SEAL CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another, carrying out the See Test 1060OC INJECTOR SEAL TEST | Move on to Step 6 | Significant leak from one injector | Replace the injectorOp. 1060F10 |
| 6 | HIGH PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the high pressure diesel parameter is correct, carrying out the See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK | Move on to Step 13 | Pressure not correct | Move on to Step 7 |
| 7 | LOW RETURN PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check using the See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECKthat the pressure in the return pipe to the tank is less than 1 bar | Move on to Step 8 | Pressure above the maximum limit: return pipe to the tank obstructed | Repair the pipe; if necessary, replace it |
| 8 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the difference in pressure at the diesel filter outlet and high pressure pump inlet is less than 0.5 bar | Move on to Step 9 | Pressure below the minimum limit or above the maximum limit | Move on to Step 12 |
| 9 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check using theSee Test that the difference in pressure upstream and downstream of the filter is less than 1 bar | Move on to Step 10 | Difference in pressure more than 1 bar | Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE |
| 10 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check using the See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECKthat the supply pump pressure at the filter inlet is correct. | Move on to Step 11 | Pressure not correct | Move on to Step 12 |
| 11 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.5 bar | Move on to Step 12 | Pressure above 0.3 bar | Replace the pipe |
| 12 | ELECTRIC PUMP POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the pump power supply voltage is correctCheck that the pump demand is correct, carrying out theSee Test 1040AA | Move on to Step 13 | 1. Voltage lower than 12 Volts2. Pump demand value incorrect | 1. Renew electrical wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT 2. Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank |
| 13 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R , if the previous checks have not achieved results, and check that the fault is no longer present | End of diagnosis | | |
