| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|
| 1 | Turn the ignition key ON.With the engine off and all users off, the Target Turbo Pressure must be within a range between 0.9 and 1.2 bars.Under the same conditions, the Turbo Pressure reading must be in a range between 0.9 and 1.2 bars and in any case must be approximately equal to the external pressure | Move on to Step 4 |
| 2 | With the engine idling and accelerator pedal not operated, the Target Turbo Pressure must be within a range between 0.9 and 1.2 bars.Under the same conditions, the Measured Turbo Pressure must be within a range between 0.9 and 1.2 bars. | Move on to Step 4 |
| 3 | With the accelerator pedal slightly operated and engine speed equal to 3000 rpm, the Target Turbo Pressure must be within a range between 10 and 23 bar.Under the same conditions, the Measured Turbo Pressure must be within a range between 10 and 23 bar.The test can be considered over | Move on to Step 4 |
| 4 | Turn the ignition key OFF.Disconnect the cable loom connector from the fuel pressure sensor. See K083 FUEL PRESSURE SENSORTurn the ignition key ON.Measure the voltage between regulator Pins 3 and 1 See N087 FUEL PRESSURE REGULATOR ON RAILEnsure that it is in a range between 4.8 and 5.2 V. | Move on to Step 6 |
| 5 | If faults are present, repair or if necessary replace the electrical wiring between the engine control unit and the sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENTThe test can be considered over | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 6 | Measure the voltage between sensor Pin 3 [EL_K083] See K083 FUEL PRESSURE SENSORand earth. Ensure that it is in a range between 4.9 and 6.0 V. | Move on to Step 5 |
| 7 | With the tester in Parameter modedisplay the Measured Turbo Pressure Ensure it is in a range between 4.8 and 5.2 V | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 8 | Connect a shunt cable with a fuse between sensor Pin 3 See K083 FUEL PRESSURE SENSORand the earth.Check that now the Measured Turbo Pressure is less than 0.3 V | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 9 | Replace the fuel pressure sensor Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R | |