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. Connect 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 P0641 – Power supply to sensors 1 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 A Turn the ignition key ON. Check that the resistance across pin 9 (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 |
| 3 | Check that the resistance across pin 30 (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 |
| 4 | 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. |
| 5 | Turn the ignition key OFF. Disconnect the wiring harness connector from the timing 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 P0641 – Power supply to sensors 1 is “Present”. | Replace the timing sensor |
| 6 | Turn the ignition key OFF. Disconnect the wiring harness connector from engine control unit connector A Turn the ignition key ON. Check that the resistance across pin 45 (wiring side) of the control unit See M010 ENGINE MANAGEMENT ECU and the earth is greater than 0.3 V. Move on to Step 8 | Move on to Step 7 |
| 7 | If faults are present, repair or if necessary replace the electrical wiring between the engine control unit and the accelerator pedal potentiometer. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Replace the wiring if necessary The test can be considered over | Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
| 8 | Turn the ignition key OFF. Check that the resistance between pin 30 (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 |
| 9 | Disconnect the wiring harness connector from engine control unit connector B Turn the ignition key ON. Check that the resistance across pin 11 (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 timing sensor and the engine control unit |
| 10 | Turn the ignition key OFF. Check that the resistance between pin 11 (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 timing sensor and the engine control unit |
| 11 | Replace the engine management control unit |
| 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 key ON. Select the following system on the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD). Check that error PO641 is "Present" | Replace the fuel pressure sensor Op. 1060G28 FUEL PRESSURE SENSOR ON FUEL MANIFOLD TO INJECTORS - R.R |
| 2 | Turn the ignition key OFF. Disconnect the wiring harness connector from the turbo pressure sensor. Turn the ignition key ON. Check that error PO641 is "Present" | Replace the turbo sensor |
| 3 | Turn the ignition key OFF. Disconnect the wiring harness connector from engine control unit connector B Turn the key ON. Check the voltage across control unit Pin 6 (wiring side) 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 | 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 |
| 5 | Turn the ignition key OFF. Check that the resistance between pin 8 (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 |
| 6 | Turn the ignition key ON. Check that the resistance across pin 24 (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 excess pressure 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 excess pressure sensor and the engine control unit |
| 8 | Turn the ignition key OFF. Check that the resistance between pin 23 (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 excess pressure sensor and the engine control unit |
| 9 | Replace the engine management control unit |
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