Injector circuit operation check
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Diesel injection system › Injector circuit operation check
INJECTOR CIRCUIT OPERATION CHECK
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Check whether any of the errors are present using the diagnostic equipment:
Move on to Step 21 | Move on to Step 2 |
| 2 | Press the START/STOP button and turn on the panel. Check that the voltage across Pin 2 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 2 |
| 3 | Press the START/STOP button. Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 500 kOhm. Continue to Step 7 | Move on to Step 4 |
| 4 | Disconnect the wiring harness connector from injector 2. Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 5 | Check that the resistance across pin 31 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 6 | Replace the injector. The test is complete | |
| 7 | Disconnect the wiring harness connector from injector 2. Check that the resistance across pin 2 and 31 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 8 | Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 2 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 9 | Check that the resistance across pin 31 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 2 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 10 | Check that the resistance across pins 1 and 2 of injector 2 is between 0.3 and 0.7 Ohms | Replace the injector |
| 11 | Press the START/STOP button. Check that the voltage across Pin 1 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 3 |
| 12 | Press the START/STOP button. Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 16 | Move on to Step 13 |
| 13 | Disconnect the wiring harness connector from injector 3. Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 14 | Check that the resistance across pin 46 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 15 | Replace the injector. The test can be considered over | |
| 16 | Disconnect the wiring harness connector from injector 3. Check that the resistance across pin 1 and 46 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 17 | Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 3 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 18 | Check that the resistance across pin 46 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 3 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 19 | Check that the resistance across pins 1 and 2 of injector 3 is between 0.3 and 0.7 Ohms | Replace the injector |
| 20 | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R The test can be considered over | |
| 21 | Press the START/STOP button and turn on the panel. Check that the voltage across Pin 16 of engine control unit connector B 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 injector 1 |
| 22 | Press the START/STOP button. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 26 | Move on to Step 23 |
| 23 | Disconnect the wiring harness connector from injector 1. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 24 | Check that the resistance across pin 47 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 25 | Replace the injector. The test can be considered over | |
| 26 | Disconnect the wiring harness connector from injector 1. Check that the resistance across pin 16 and 47 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 27 | Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 1 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 28 | Check that the resistance across pin 47 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 1 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 29 | Check that the resistance across pins 1 and 2 of injector 1 is between 0.3 and 0.7 Ohms | Replace the injector |
| 30 | Press the START/STOP button. Check that the voltage across Pin 17 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 4 |
| 31 | Press the START/STOP button. Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 35 | Move on to Step 32 |
| 32 | Disconnect the wiring harness connector from injector 4. Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 33 | Check that the resistance across pin 33 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 34 | Replace the injector. The test is complete | |
| 35 | Disconnect the wiring harness connector from injector 4. Check that the resistance across pin 17 and 33 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 36 | Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 4 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 37 | Check that the resistance across pin 33 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 4 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 38 | Check that the resistance across pins 1 and 2 of injector 4 is between 0.3 and 0.7 Ohms | Replace the injector |
| 39 | Replace the engine management control unit |
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Check whether any of the errors are present using the diagnostic equipment:
Move on to Step 21 | Move on to Step 2 |
| 2 | Press the START/STOP button and turn on the panel. Check that the voltage across Pin 2 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 2 |
| 3 | Press the START/STOP button. Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 500 kOhm. Continue to Step 7 | Move on to Step 4 |
| 4 | Disconnect the wiring harness connector from injector 2. Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 5 | Check that the resistance across pin 31 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 6 | Replace the injector. The test is complete | |
| 7 | Disconnect the wiring harness connector from injector 2. Check that the resistance across pin 2 and 31 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 8 | Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 2 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 9 | Check that the resistance across pin 31 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 2 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 10 | Check that the resistance across pins 1 and 2 of injector 2 is between 0.3 and 0.7 Ohms | Replace the injector |
| 11 | Press the START/STOP button. Check that the voltage across Pin 18 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 3 |
| 12 | Press the START/STOP button. Check that the resistance across pin 18 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 16 | Move on to Step 13 |
| 13 | Disconnect the wiring harness connector from injector 3. Check that the resistance across pin 18 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 14 | Check that the resistance across pin 48 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 15 | Replace the injector. The test can be considered over | |
| 16 | Disconnect the wiring harness connector from injector 5. Check that the resistance across pin 18 and 48 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 17 | Check that the resistance across pin 18 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 3 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 18 | Check that the resistance across pin 48 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 5 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 19 | Check that the resistance across pins 1 and 2 of injector 5 is between 0.3 and 0.7 Ohms | Replace the injector |
| 20 | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R The test can be considered over | |
| 21 | Press the START/STOP button and turn on the panel. Check that the voltage across Pin 16 of engine control unit connector B 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 injector 1 |
| 22 | Press the START/STOP button. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 26 | Move on to Step 23 |
| 23 | Disconnect the wiring harness connector from injector 1. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 24 | Check that the resistance across pin 47 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 25 | Replace the injector. The test can be considered over | |
| 26 | Disconnect the wiring harness connector from injector 1. Check that the resistance across pin 16 and 47 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 27 | Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 1 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 28 | Check that the resistance across pin 47 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 1 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 29 | Check that the resistance across pins 1 and 2 of injector 1 is between 0.3 and 0.7 Ohms | Replace the injector |
| 30 | Press the START/STOP button. Check that the voltage across Pin 1 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 3 |
| 31 | Press the START/STOP button. Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 36 | Move on to Step 32 |
| 32 | Disconnect the wiring harness connector from injector 3. Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 33 | Check that the resistance across pin 46 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 34 | Replace the injector. The test is complete | |
| 35 | Disconnect the wiring harness connector from injector 3. Check that the resistance across pin 1 and 46 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring of the engine control unit |
| 36 | Check that the resistance across pin 1 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 3 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 37 | Check that the resistance across pin 46 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 3 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 38 | Check that the resistance across pins 1 and 2 of injector 3 is between 0.3 and 0.7 Ohms | Replace the injector |
| 39 | Press the START/STOP button. Check that the voltage across Pin 17 of engine control unit connector B See M010 ENGINE MANAGEMENT ECU and earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the engine control unit and injector 4 |
| 40 | Press the START/STOP button. Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. Move on to Step 44 | Move on to Step 41 |
| 41 | Disconnect the wiring harness connector from injector 4. Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 42 | Check that the resistance across pin 33 of control unit connector B See M010 ENGINE MANAGEMENT ECU and Earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 43 | Replace the injector. The test can be considered over | |
| 44 | Check that the resistance across pin 17 and 33 of the control unit See M010 ENGINE MANAGEMENT ECU is greater than 500 kOhms | Repair or if necessary replace the electrical wiring between the engine control unit |
| 45 | Check that the resistance across pin 17 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 1 of injector 4 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 46 | Check that the resistance across pin 33 of control unit connector B See M010 ENGINE MANAGEMENT ECU Pin 2 of injector 4 is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the engine control unit and the injector |
| 47 | Check that the resistance across pins 1 and 2 of injector 4 is between 0.3 and 0.7 Ohms | Replace the injector |
| 48 | Replace the engine management control unit |
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