Glow plugs functional test
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Engine starting › Glow plugs functional test
GLOW PLUGS FUNCTIONAL TEST
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | Check that the glow plugs operate correctly | Replace the faulty glow plugs |
| 2 | Press the START/STOP button and turn off the engine. Disconnect the wiring harness connector from the glow plug control unit See M015 PLUG PREHEATING CONTROL UNIT Measure the voltage between Pin 3 of control unit wiring side connector A and Earth, ensuring it is greater than 11 V. See M015 PLUG PREHEATING CONTROL UNIT Move on to Step 6 | Move on to Step 3 |
| 3 | In the engine bay junction unti, remove fuse F11 from the block (third from the right in the lower row). Measure the voltage between the fuse input contact and earth, checking it is less than 11 V | Repair or if necessary replace the electrical wiring between the junction unit in the engine compartment and the glow plug control unit. |
| 4 | Restore the connections or, if necessary, replace the junction unit in the engine compartment Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. The test may be considered completed | |
| 5 | Measure the voltage between Pins 1 and 3 of control unit wiring side connector A and Earth, ensuring it is greater than 11 V. | Restore the earth connection of the glow plug control unit or if necessary replace the electrical wiring |
| 6 | Press the START/STOP button. Measure the voltage between Pin 1 of control unit wiring side connector A and Earth, ensuring it is greater than 11 V. | Repair or if necessary replace the electrical wiring between the junction unit in the engine compartment and the glow plug control unit. |
| 7 | Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit. Carry out the active diagnosis for the preheating relay, checking that the result is positive. Move on to Step 10 | Move on to Step 9 |
| 8 | If faults are present, repair or if necessary replace the electrical wiring between the glow plug preheating and the engine control unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine management control unit |
| 9 | Connect a shunt cable with fuse between pin 1 of control unit connector A and earth. See M015 PLUG PREHEATING CONTROL UNIT Carry out active diagnosis of the preheating relay to check whether it is successful or not | Move on to Step 8 |
| 10 | Press the START/STOP button. Disconnect the shunt connection. Disconnect the wiring harness connector from engine control unit connector A See M010 ENGINE MANAGEMENT ECU Press the START/STOP button. Measure the voltage between Pin 2 of control unit wiring side connector A and Earth, ensuring it is less than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine compartment control unit and the glow plug control unit. |
| 11 | Press the START/STOP button. Measure the resistance between Pin 2 of control unit wiring side connector A and Earth, ensuring it is greater than 500 V. | Repair or if necessary replace the electrical wiring between the engine compartment control unit and the glow plug control unit. |
| 12 | Measure the resistance between Pin 2 of control unit connector A and Pin 93 of control unit connector A to ensure it is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine compartment control unit and the glow plug control unit. |
| 13 | Disconnect the wiring harness connector from the first two glow plugs A and B. Turn the ignition key ON. Measure the voltage between Pins 1 and 2 of the control unit and Earth, ensuring it is less than 0.3 V. | Repair or if necessary replace the electrical wiring between the glow plug control unt and the glow plugs |
| 14 | Press the START/STOP button. Measure the resistance between Pins 1 and 2 of the control unit and glow plugs A and B, ensuring it is less than 5 Ohms. | Repair or if necessary replace the electrical wiring between the glow plug control unt and the glow plugs |
| 16 | Replace the glow plug control unti and ensure the fault disappears. Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R The test can be considered over | Move on to Step 16 |
| 16 | Repair the original glow plug control unit. Disconnect the wiring harness connector from the other two glow plugs C and D. Press the START/STOP button. Measure the voltage between Pins 3 and 4 of the control unit and Earth, ensuring it is less than 0.3 V. | Repair or if necessary replace the electrical wiring between the glow plug control unt and the glow plugs |
| 17 | Turn the ignition key OFF. Measure the resistance between Pins 3 and 4 of the control unit and glow plugs C and D, ensuring it is less than 5 Ohms. | Repair or if necessary replace the electrical wiring between the glow plug control unt and the glow plugs |
| 18 | Replace the engine management control unit |
Parts & tools for this job Staging For 2005 Alfa Romeo 159
- PARTGlow plugsSearch: Alfa Romeo 159 2005 glow plugs
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- TOOLDiesel compression testerSearch: diesel compression tester
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