| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|
| Check: - Check that the air intake/vacuum circuit is working properly
- Air filter blocked
- Ducts blocked
- Leaks from intake ducts after the compressor
- Fuel leaks
| Move on to Step 1 | 1. Air intake circuit ducts blocked2. Filter blocked and water, petrol, paraffin or dirt found to be present3. Fuel leaks | 1. Renew the air intake circuit2. Water, water, paraffin or dirt found to be present3. Restore the fuel system seal |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|
| Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check that there are no errors present in the control unit | End of diagnosis | Presence of errors in control unit | Continue following the instructions on the diagnostic equipment |
| 2 | EGR VALVE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the EGR solenoid valve is not stuck openCheck that the EGR valve is working properly by carrying out the active diagnosis using the Examiner and checking that the valve does not remain open by carrying outSee Test 1080CB | Move on to Step 3 | Solenoid not working | Check the continuity of the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT replace the solenoid valve if necessary Op. 1080C82 E.G.R. - VALVE HEAT EXCHANGER ASSEMBLY - CONNECTOR PIPES - R.R. |
| 3 | DIESEL HIGH PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the high pressure value is correct by carrying out See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK | Move on to Step 7 | Pressure not correct | Move on to Step 4 |
| 4 | DIESEL LOW PRESSURE CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the low pressure value is correct by carrying out See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK | Move on to Step 5 | Pressure not correct | Move on to Step 6 |
| 5 | FUEL PUMP CHECK | All OK | Problems encountered | Operation |
|---|
| Using the Examiner check that the fuel pump absorption is correct by carrying outSee Test 1040AA | Move on to Step 6 | Electric pump defective | Replace the electric pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R |
| 6 | CHECK ON DIESEL PRESSURE SENSOR ON RAIL | All OK | Problems encountered | Operation |
|---|
| Check that the ressure sensor on the rail is working properly by carrying out See Test 1060GR FUEL PRESSURE SENSOR ON RAIL OPERATION CHECK | Move on to Step 7 | 1. Regulator wiring defective2. Pressure sensor defective | 1. Restore correct wiring2. Replace the pressure sensor Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R |
| 7 | FLOW METER CHECK | All OK | Problems encountered | Operation |
|---|
| Check the continuity of the wiring between the engine management control unit and the flow meterCheck that the flow meter is receiving the correct power supply [EL_5050] See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Check that the flow meter signal is correct using the Examiner by carrying out See Test 1060GS FLOW METER OPERATION CHECK | Move on to Step 8 | 1. Flow meter signal not correct2. Wiring between flow meter and engine management control unit broken3. Power supply interrupted | 1. Replace the flow meter Op. 1060G10 AIR FLOW METER - R.R. 2. Restore correct wiring.3. Restore correct power supply. |
| 8 | INJECTOR 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 by carrying out See Test 1060OC INJECTOR SEAL TESTCheck that the injectors are working properly by connecting to the engine management control unit in active diagnosis | Move on to Step 9 | 1. Injector with leaks/poor atomization2. Check the continuity of the wiring between the engine management control unit and the injectors | 1. Replace the injectorOp. 1060F10 2. Restore the correct wiring continuity. |
| 9 | CYLINDER COMPRESSION CHECK | All OK | Problems encountered | Operation |
|---|
| Carry out the cylinder compression checkOp. 0520G15 | Move on to Step 11 | Cylinder compression insufficient | Move on to Step 10 |
| 10 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems encountered | Operation |
|---|
| Carry outOp. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKETto check the valve sealCheck condition of cylinders/piston rings | End of diagnosis | 1. Valve seal insufficient2. Cylinder geometry/dimensions faulty3. Piston rings faulty | 1. Overhaul the cylinder head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL 2. Restore correct operation3. Restore correct operation |
| 11 | ENGINE CONTROL UNIT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Replace the engine 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 | Move on to Step 12 |
| 12 | CHECK ON CORRECT OPERATION OF HIGH PRESSURE PUMP | All OK | Problems encountered | Operation |
|---|
| Replace the high pressure pump Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R. | End of diagnosis | | |
