Injector circuit operation check
- Make
- Fiat
- Model
- Croma Factory Service Manual
- Year
- 2005–2010
- 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 | Turn the ignition key ON. Check that the voltage across Pin 2 of engine control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT 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 | Turn the ignition key OFF. Check that the resistance across pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 500 kOhm. Continue to Step 7 | Move on to Step 4 |
| 4 | Disconnect the cable loom connector from injector 2. Check that the resistance between pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 5 | Check that the resistance between pin 31 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 6 | Replace the injector. The test is complete | |
| 7 | Disconnect the cable loom connector from injector 2. Check that the resistance across pin 2 and 31 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the electrical wiring of the engine control unit |
| 8 | Check that the resistance between pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 2 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 9 | Check that the resistance between pin 31 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 2 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 10 | Check that the resistance between pins 1 and 2 of injector 2 is between 0.3 and 0.7 Ohm | Replace the injector |
| 11 | Turn the ignition key ON. Check that the voltage between Pin 1 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 3 |
| 12 | Turn the ignition key OFF. Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 16 | Move on to Step 13 |
| 13 | Disconnect the cable loom connector from injector 3. Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 14 | Check that the resistance between pin 46 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 15 | Replace the injector. The test can be considered over | |
| 16 | Disconnect the cable loom connector from injector 3. Check that the resistance between pins 1 and 46 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the electrical wiring of the engine control unit |
| 17 | Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 3 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 18 | Check that the resistance between pin 46 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 3 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 19 | Check that the resistance between pins 1 and 2 of injector 3 is between 0.3 and 0.7 Ohm | 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 | Turn the ignition key ON. Check that the voltage between Pin 16 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and the earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 1 |
| 22 | Turn the ignition key OFF. Check that the resistance between pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 26 | Move on to Step 23 |
| 23 | Disconnect the cable loom connector from injector 1. Check that the resistance between pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 24 | Check that the resistance between pin 47 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 25 | Replace the injector. The test can be considered over | |
| 26 | Disconnect the cable loom connector from injector 1. Check that the resistance between pins 16 and 47 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 27 | Check that the resistance between pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 1 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 28 | Check that the resistance between pin 47 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 1 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 29 | Check that the resistance between pins 1 and 2 of injector 1 is between 0.3 and 0.7 Ohm | Replace the injector |
| 30 | Turn the ignition key ON. Check that the voltage between Pin 17 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 4 |
| 31 | Turn the ignition key OFF. Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 35 | Move on to Step 32 |
| 32 | Disconnect the cable loom connector from injector 4. Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 33 | Check that the resistance between pin 33 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 34 | Replace the injector. The test is complete | |
| 35 | Disconnect the cable loom connector from injector 4. Check that the resistance between pins 17 and 33 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 36 | Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 4 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 37 | Check that the resistance between pin 33 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 4 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 38 | Check that the resistance between pins 1 and 2 of injector 4 is between 0.3 and 0.7 Ohm | 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 | Turn the ignition key ON. Check that the voltage between Pin 2 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 2 |
| 3 | Turn the ignition key OFF. Check that the resistance between pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 500 kOhm. Move on to Step 7 | Move on to Step 4 |
| 4 | Disconnect the cable loom connector from injector 2. Check that the resistance between pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 5 | Check that the resistance between pin 31 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 6 | Replace the injector. The test is complete | |
| 7 | Disconnect the cable loom connector from injector 2. Check that the resistance between pins 2 and 31 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 8 | Check that the resistance between pin 2 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 2 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 9 | Check that the resistance between pin 31 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 2 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 10 | Check that the resistance between pins 1 and 2 of injector 2 is between 0.3 and 0.7 Ohm | Replace the injector |
| 11 | Turn the ignition key ON. Check that the voltage between Pin 18 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 3 |
| 12 | Turn the ignition key OFF. Check that the resistance between pin 18 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 16 | Move on to Step 13 |
| 13 | Disconnect the cable loom connector from injector 3. Check that the resistance between pin 18 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 14 | Check that the resistance between pin 48 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 15 | Replace the injector. The test can be considered over | |
| 16 | Disconnect the cable loom connector from injector 5. Check that the resistance between pins 18 and 48 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 17 | Check that the resistance between pin 18 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 3 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 18 | Check that the resistance across pin 48 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 5 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 19 | Check that the resistance between pins 1 and 2 of injector 5 is between 0.3 and 0.7 Ohm | 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 | Turn the ignition key ON. Check that the voltage between Pin 16 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and the earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 1 |
| 22 | Turn the ignition key OFF. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 26 | Move on to Step 23 |
| 23 | Disconnect the cable loom connector from injector 1. Check that the resistance across pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 24 | Check that the resistance between pin 47 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 25 | Replace the injector. The test can be considered over | |
| 26 | Disconnect the cable loom connector from injector 1. Check that the resistance between pins 16 and 47 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 27 | Check that the resistance between pin 16 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 1 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 28 | Check that the resistance between pin 47 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 1 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 29 | Check that the resistance between pins 1 and 2 of injector 1 is between 0.3 and 0.7 Ohm | Replace the injector |
| 30 | Turn the ignition key ON. Check that the voltage between Pin 1 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 3 |
| 31 | Turn the ignition key OFF. Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 36 | Move on to Step 32 |
| 32 | Disconnect the cable loom connector from injector 3. Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 33 | Check that the resistance between pin 46 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 34 | Replace the injector. The test is complete | |
| 35 | Disconnect the cable loom connector from injector 3. Check that the resistance between pins 1 and 46 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the wiring for the engine management control unit |
| 36 | Check that the resistance between pin 1 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 3 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 37 | Check that the resistance between pin 46 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 3 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 38 | Check that the resistance between pins 1 and 2 of injector 3 is between 0.3 and 0.7 Ohm | Replace the injector |
| 39 | Turn the ignition key ON. Check that the voltage between Pin 17 of engine management control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and earth is greater than 0.3 V. | Repair or, if necessary, replace the electrical wiring between the engine managment control unit and injector 4 |
| 40 | Turn the ignition key OFF. Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. Move on to Step 44 | Move on to Step 41 |
| 41 | Disconnect the cable loom connector from injector 4. Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 42 | Check that the resistance between pin 33 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT and Earth is more than 500 kOhm. | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 43 | Replace the injector. The test can be considered over | |
| 44 | Disconnect the cable loom connector from injector 4. Check that the resistance between pins 17 and 33 of the control unit See M010 ENGINE MANAGEMENT CONTROL UNIT is greater than 500 kOhm | Repair or, if necessary, replace the electrical wiring between the engine management control unit |
| 45 | Check that the resistance between pin 17 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 1 of injector 4 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 46 | Check that the resistance between pin 33 of control unit connector B See M010 ENGINE MANAGEMENT CONTROL UNIT Pin 2 of injector 4 is less than 5 Ohm | Repair or, if necessary, replace the electrical wiring between the engine management control unit and the injector |
| 47 | Check that the resistance between pins 1 and 2 of injector 4 is between 0.3 and 0.7 Ohm | Replace the injector |
| 48 | Replace the engine management control unit |
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