Flow modulator solenoid operation check
- Make
- Alfa Romeo
- Model
- Brera and Spider Factory Service Manual
- Year
- 2005–2010
- Section
- Diesel injection system › Flow modulator solenoid operation check
FLOW MODULATOR SOLENOID OPERATION CHECK
| 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 cable loom connector from the flow modifying solenoid valve. Press the START/STOP button. Check that the voltage across pin 6 of the solenoid See L064 FLOW MODIFYING SOLENOID VALVE and the earth is greater than 11 V. Move on to Step 4 | Move on to Step 2 |
| 2 | Press the START/STOP button. In the engine compartment junction unit remove fuse F11 (third from the right in the bottom row). Press the START/STOP button. Check the voltage between the inlet contact of fuse F11 and earth. Ensure it is greater than 11 V. | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 3 | If faults are found, restore the wiring between the junction unit and the solenoid See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT If necessary, replace the wiring. The test may be considered complete | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 4 | Check that the voltage across pin 6 and 2 of the solenoid See L064 FLOW MODIFYING SOLENOID VALVE is greater than 11 V. Move on to Step 6 | Move on to Step 5 |
| 5 | If faults are found, restore the wiring between the engine control unit and the solenoid See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Replace the wiring if necessary The test can be considered over | Replace the engine management control unit |
| 6 | Press the START/STOP button. Disconnect the wiring harness connector from engine control unit connector B Press the START/STOP button. Check that the voltage across pin 45 of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 7 | Press the START/STOP button. Check that the voltage across pin 45 of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 8 | Check that the voltage across pin 45 of the control unit See M010 ENGINE MANAGEMENT ECU and pin 1 of the solenoid See L064 FLOW MODIFYING SOLENOID VALVE is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 9 | Press the START/STOP button. Check that the voltage across pin 35 of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 10 | Press the START/STOP button. Check that the voltage across pin 35 of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 11 | Check that the voltage across pin 35 of the control unit See M010 ENGINE MANAGEMENT ECU and pin 5 of the solenoid See L064 FLOW MODIFYING SOLENOID VALVE is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the solenoid |
| 12 | Replace the flow bypass solenoid Op. 1060E20 and check the fault has disappeared | Restore the original solenoid valve and replace the engine management control unit |
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