Check engine control unit connections
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Diesel injection system › Check engine control unit connections
CHECK ENGINE CONTROL UNIT CONNECTIONS
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Turn the ignition key OFF. Disconnect the wiring harness connector from the fuel pressure sensor. Turn the ignition key ON. Select the following system on the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9). Check that error P0651 – Power supply to sensors 2 is “Present”. Move on to Step 5 | Move on to Step 2 |
| 2 | Turn the ignition key OFF. Disconnect the wiring harness connector from engine control unit connector B Turn the ignition key ON. Check that the resistance across pin 43 (wiring side) 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 fuel pressure sensor and the engine control unit |
| 3 | Check that the resistance across pin 8 (wiring side) 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 fuel pressure sensor and the engine control unit |
| 4 | Replace the fuel pressure sensor Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R The test can be considered over | |
| 5 | Turn the ignition key OFF. Disconnect the wiring harness connector from the air temperature/pressure sensor. Turn the ignition key ON. Select the following system on the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9) Check that error P0651 – Power supply to sensors 2 is “Present”. Move on to Step 9 | Move on to Step 6 |
| 6 | Turn the ignition key OFF. Disconnect the wiring harness connector from engine control unit connector B Turn the ignition key ON. Check that the resistance across pin 40 (wiring side) 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 air pressure/temperature sensor and the engine control unit |
| 7 | Check that the resistance across pin 23 (wiring side) 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 air pressure/temperature sensor and the engine control unit |
| 8 | Replace the air temperature/pressure sensor Op. 1060G16 PRESSURE RELIEF SENSOR - R.R. The test can be considered over | |
| 9 | Turn the ignition key OFF. Disconnect the wiring harness connector from the accelerator pedal potentiometer Turn the ignition key ON. Select the following system on the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9). Check that error P0651 – Power supply to sensors 2 is “Present”. Move on to Step 13 | Move on to Step 10 |
| 10 | Turn the ignition key OFF. Disconnect the cable loom connector from control unit connector A Turn the ignition key ON. Check that the resistance across pin 31 (wiring side) 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 accelerator pedal potentiometer and the engine control unit |
| 11 | Check that the resistance across pin 8 (wiring side) 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 accelerator pedal potentiometer and the engine control unit |
| 12 | Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R and check the fault has disappeared. The test can be considered over | Repair the original accelerator pedal and replace the engine management control unit. |
| 13 | Turn the ignition key OFF. Disconnect the wiring harness connector from engine control unit connector B Turn the ignition key ON. Check that the resistance across pin 28 (wiring side) 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 fuel pressure sensor and the engine control unit |
| 14 | Turn the ignition key OFF. Check that the resistance between pin 28 (wiring side) 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 fuel pressure sensor and the engine control unit |
| 15 | Disconnect the cable loom connector from control unit connector A Turn the ignition key ON. Check that the resistance across pin 46 (wiring side) 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 accelerator pedal potentiometer and the engine control unit |
| 16 | Turn the ignition key OFF. Check that the resistance between pin 46 (wiring side) 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 accelerator pedal potentiometer and the engine control unit |
| 17 | Disconnect the cable loom connector from control unit connector B Turn the ignition key ON. Check that the resistance across pin 13 (wiring side) 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 air pressure/temperature sensor and the engine control unit |
| 18 | Check that the resistance between pin 13 (wiring side) 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 air pressure/temperature sensor and the engine control unit |
| 19 | Replace the engine management control unit |
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