| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|
| 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 CHECKCheck the condition of the fuel supply circuit and make sure that it is working properly See Test 1040OA FUEL SUPPLY CIRCUIT CHECKAlso check:1. wiring on engine correctly fastened to earth;2. battery correctly fastened to earth;3. positive battery terminal and all leads connected to it correctly fastened | Move on to Step 1 | Oil level incorrect | Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY |
| Supply fastenings slack or oxidized | Restore correct fastenings See E1010 POWER SUPPLY |
| Earth fastenings slack or oxidized | Restore correct fastenings See E1010 POWER SUPPLY |
| 1 | MODE PARAMETERS CHECK | All OK | Problems encountered | Operation |
|---|
| Select the following control unit at the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9).Check the value of the following parameters:· Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK· Engine rpm See Test 1060GI CHECK ENGINE SPEED- Target Diesel pressure- Measured Diesel pressure See Test 1060GH DIESEL PRESSURE CHECK | Move on to Step 2 | | |
| 2 | PREHEATING RELAY ACTIVE DIAGNOSIS | All OK | Problems encountered | Operation |
|---|
| Carry out the active diagnosis for the preheating relay, checking that the result is positive. | The check on the following system is only necessary if the outside temperature is below 0 °C. |
| Move on to Step 4 | The result of the active diagnosis is negative | Move on to Step 3 |
| 3 | HEATER PLUGS CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the glow heater plugs are working properly See Test 5520CA CHECK GLOW PLUG OPERATION | Move on to Step 4 | | |
| 4 | ELECTRICAL EQUIPMENT CHECK | All OK | Problems encountered | Operation |
|---|
| Check that fuse F59 has not blown (second from the left on the second row from the bottom) | Move on to Step 5 | Fuse F59 has blown | Restore the connections or, if necessary, replace the junction unit in the engine compartment Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 5 | DIESEL PREHEATING RELAY CHECK | All OK | Problems encountered | Operation |
|---|
| Check the diesel preheating relay circuitSee Test 5505AC | Move on to Step 6 | | |
| 6 | INJECTOR HIGH PRESSURE 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. See Test 1060OC INJECTOR SEAL TEST | Move on to Step 7 | Significant leak from one injector | Replace the injector Op. 1060F10 FUEL INJECTORS - R.R. |
| 7 | HIGH PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the diesel pressure parameter is correct. See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK | Move on to Step 15 | Pressure not correct | Move on to Step 8 |
| 8 | LOW RETURN PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the pressure in the return pipe to the tank is less than 1 bar See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECK | Move on to Step 9 | Pressure above the maximum limit: return pipe to the tank obstructed | Repair the pipe; if necessary, replace it |
| 9 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK | Move on to Step 14 | Pressure below the minimum limit or above the maximum limit | Move on to Step 10 |
| 10 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the difference in pressure upstream and downstream of the filter is less than 1 bar | Move on to Step 11 | Difference in pressure more than 1 bar | Replace the fuel filter cartridge Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE |
| 11 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the supply pump pressure at the filter inlet is more than 2.2 bar | Move on to Step 11 | Pressure below 2.2 bar | Move on to Step 12 |
| 12 | 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 0.3 bar | Move on to Step 13 | Difference in pressure more than 0.3 bar | Replace the pipe |
| 13 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE | Move on to Step 14 | Voltage lower than 12 V | Renew electrical wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| Current greater than 10 A: pump defective | Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R |
| Current less than 2 A: pump obstructed | Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank |
| 14 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Replace the DRV high pressure regulation valve and check that the fault is no longer present.Op. 1060E50 | End of diagnosis | Fault persists | Move on to Step 15 |
| 15 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Replace the engine management control unit and check that the fault is no longer present Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R | End of diagnosis | Fault persists | Contact technical service for further information on the problem |