939010198 - 1060GR CHECK OPERATION OF FUEL PRESSURE SENSOR ON RAIL
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Press the START/STOP button and turn off the engine.Disconnect the wiring harness connector from the fuel pressure regulator on the rail.Press the START/STOP button.Check that the voltage across pin 2 of the governor See N087 FUEL PRESSURE REGULATOR ON RAILand the earth is greater than 11 V.Move on to Step 4 | Move on to Step 2 |
| 2 | Press the START/STOP button.Disconnect the cable loom connector from the engine management control unit connector A.In the engine compartment junction unit, remove relay T9 (in the middle of the lower row)Connect a bridge with a fuse to Pins 30 and 87 of the socket for relay T9.Check that the voltage across pin 1 of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is greater than 11 V. | Repair or if necessary replace the electrical wiring between the engine compartment junction unit and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 3 | If faults are found, restore the wiring between the engine compartment junction unit and the engine compartment junction unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Replace it if necessary.The test can be considered over | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 4 | Press the START/STOP button.Disconnect the wiring harness connector from engine control unit connector BPress the START/STOP button. Check that the voltage across Pin 1 of the regulator See N087 FUEL PRESSURE REGULATOR ON RAILand the earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine compartment junction unit and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 5 | Press the START/STOP button.Check that the resistance across pin 1 of the regulator See N087 FUEL PRESSURE REGULATOR ON RAILand the earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine compartment junction unit and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 6 | Check that the resistance across pin 1 of the regulator See N087 FUEL PRESSURE REGULATOR ON RAILand Pin 34 of control unit connector B See M010 ENGINE MANAGEMENT ECU is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine compartment junction unit and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 7 | Replace the pressure regulator Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R | Repair the original regulator and replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |