| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
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| 1 | Turn the ignition key ON.With the engine off and all appliances off, the measured turbo pressure should be in a range between 0.9 and 1.1 bars and must be equal to the exterior pressure.Under the same conditions, turbo pressure AD/C should be in a range between 1.5 and 2.0 V | Move on to Step 3 |
| 2 | With the accelerator pedal slightly operated and engine speed equal to 3500 rpm, the measured Turbo pressure should be greater than 1.1 bars.Under the same conditions, turbo pressure AD/C must be greater than 2.0 V.The test can be considered over | Move on to Step 3 |
| 3 | Turn the ignition key OFF. Disconnect the wiring harness connector from the turbo sensor.Turn the ignition key ON.Measure the voltage between sensor Pin 1 See K082 SUPERCHARGING SENSOR and earth. Ensure that it is in a range between 4.8 and 5.2 V.Move on to Step 5 | Move on to Step 4 |
| 4 | 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 MANAGEMENT The test can be considered over | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 5 | Measure the voltage between sensor Pins 1 and 3 See K082 SUPERCHARGING SENSOR Ensure that it is in a range between 4.8 and 5.2 V. | Move on to Step 4 |
| 6 | Check that turbo pressure AD/C is in a range between 4.8 and 5.2 V.Move on to Step 8 | Move on to Step 7 |
| 7 | Check that turbo pressure AD/C is greater than 5.2 V.Move on to Step 4 | Repair or if necessary replace the electrical wiring between the engine control unit and the sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 8 | Turn the ignition key OFF.Connect a shunt connection cable with a fuse between Pins 1 and 4 of the sensor See K082 SUPERCHARGING SENSOR Turn the ignition key ON.Check that turbo pressure AD/C is less than 0.3 V. | Move on to Step 4 |
| 9 | Check the correct mechanical operation (seals, leaks, blockages, breaks) of the turbocharging circuit | Repair or, if necessary, replace the faulty components |
| 10 | Replace the turbo sensor Op. 1060G16 EXCESS PRESSURE SENSOR - R.R. | |