Diesel pressure check
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Diesel injection system › Diesel pressure check
DIESEL PRESSURE CHECK
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | With the engine idling and warm, with all users off and the accelerator pedal not operated, the target Diesel Pressure and the measured Diesel Pressure must be in a range between 200 and 500 bars | Move on to Step 3 |
| 2 | When the accelerator pedal is pumped several times, the measured Diesel Pressure must be in a range between 200 and 1500 bars. The test can be considered over | Move on to Step 3 |
| 3 | Turn the ignition key to the OFF position. Disconnect the wiring harness connector from the fuel pressure sensor. Turn the ignition key ON. Measure the voltage between Pin 3 (wiring side) of the sensor and Earth, checking that it is within 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 fuel pressure sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine management control unit |
| 5 | Measure the voltage between Pins 1 and 3 (wiring side) of the sensor. Check it is in a range between 4.8 and 5.2 V | Move on to Step 4 |
| 6 | Measure the voltage between Pin 2 (wiring side) of the sensor and Earth, ensuring it is in a range between 4.8 and 5.2 V. | Move on to Step 4 |
| 7 | Replace the pressure sensor and check the fault has disappeared Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R | Repair the original pressure sensor and replace the engine management control unit. |
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Turn the ignition key to the ON position. The measured diesel pressure must be greater than 200 bars | Move on to Step 4 |
| 2 | With the engine idling and warm, with all the appliances off and the accelerator pedal not operated, the target diesel pressure and the measured diesel pressure must be within a range between 230 and 270 bars. | Move on to Step 4 |
| 3 | When the accelerator pedal is operated several times, the measured diesel pressure must be greater than 250 bars The test can be considered over | Move on to Step 4 |
| 4 | Position the ignition key on OFF. Disconnect the wiring harness connector from the fuel pressure sensor. Turn the ignition key ON. Measure the voltage across pin 3 (wiring side) of the sensor wiring connector 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 5 |
| 5 | If faults are present, repair or if necessary replace the electrical wiring between the engine control unit and the fuel pressure sensor See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine management control unit |
| 6 | Measure the voltage between pins 1 and 3 of the sensor wiring connector (wiring side) Ensure that it is in a range between 4.8 and 5.2 V. | Move on to Step 5 |
| 7 | Measure the voltage across pin 2 (wiring side) of the sensor wiring connector and earth. Ensure that it is in a range between 4.8 and 5.2 V. | Move on to Step 5 |
| 8 | Replace pressure sensor Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R and check the fault has disappeared | Repair the original pressure sensor and replace the engine management control unit. |
Parts & tools for this job For 2005 Fiat Grande Punto
- PARTGlow plugsSearch: Fiat Grande Punto 2005 glow plugs
- TOOLGlow plug socketSearch: glow plug socket
- TOOLDiesel compression testerSearch: diesel compression tester
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