| | Test results |
| 0 | Preliminary checks | All OK | Problems encountered | Operation |
|---|
| Check that the engine oil level is correct [TEST_0010T11].Check that the air intake/vacuum circuit is working properly.Also check:Wiring on engine correctly fastened to earth;Battery correctly fastened to earth;That the positive battery terminal and all leads connected to it are correctly fastened. Activation of the inertia switchPresence of fuel in the tankAir filter blockedFuel filter blocked | Move on to Step 1. | 1.Oil level incorrect.2.Supply fastenings slack or oxidized.3.Earth fastenings slack or oxidized.4.Inertia switch operated.5.No fuel in the tank.6.Air filter blocked.7.Fuel filter blocked. | 1.Restore the correct engine oil level. Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY 2.Restore correct fastenings. See E1010 POWER SUPPLY 3.Restore correct fastenings. See E1020 EARTHS 4.Renew the inertia switch after having identified the cause5.Refill the fuel6.Replace the filter element. Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE. 7.Replace the fuel filter. Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE |
| 1 | Check using Examiner | All OK | Problems encountered | Operation |
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| Connect to the engine management control unit and check that there are no errors. | Move on to Step 3. | 1.Engine management control unit power supply incorrect2.Main relay defective. | 1.Restore control unit power supply.2.Replace main relay. |
| 2 | Engine management 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 management control unit power supply incorrect.2.Main relay defective. | 1.Restore control unit power supply.2.Replace main relay. |
| 3 | Injector seal check | All OK | Problems encountered | Operation |
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| Check See Test 1060OC INJECTOR SEAL TESTthat the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another. | Move on to Step 4. | Significant leak from one injector. | Replace the injector. Op. 1060F10 FUEL INJECTORS - R.R. |
| 4 | High pressure check | All OK | Problems encountered | Operation |
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| Check See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECKthat the diesel high pressure parameter is correct. | Move on to Step 10. | Pressure not correct. | Move on to Step 5. |
| 5 | Low return pressure check | All OK | Problems encountered | Operation |
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| Check 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 6. | Pressure above the maximum limit: return pipe to the tank obstructed. | Repair the pipe, if necessary, replace it. |
| 6 | Low supply pressure check | All OK | Problems encountered | Operation |
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| Check, as described in Test_1060OB, that the diesel pressure between the filter and the pressure pump is between 3.5 and 5 bar | Move on to Step 7. | Pressure below the minimum limit or above the maximum limit. | Move on to Step 10. |
| 7 | Low supply pressure check | All OK | Problems encountered | Operation |
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| Check that the difference in pressure upstream and downstream of the filter is less than 1 bar by carrying out Test_1060OF | Move on to Step 8. | Difference in pressure more than 1 bar. | Replace the fuel filter cartridge. Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE |
| 8 | Low supply pressure check | All OK | Problems encountered | Operation |
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| Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.3 bar. | Move on to Step 9. | Pressure above 0.3 bar. | Replace the pipe. |
| 9 | Electric pump supply check | All OK | Problems encountered | Operation |
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| Check See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKEthat the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A. | Move on to Step 10. | 1. Voltage lower than 12 V2. Current greater than 10 A: pump defective3. Current less than 2 A: pump obstructed | 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 3. Replace the fuel pump. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank. |
| 10 | Correct operation check | All OK | Problems encountered | Operation |
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| Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R and check that the fault is no longer present. | End of diagnosis. | The fault persists. | Contact the Service Department for further information on the problem. |